Film wrapping machine simultaneously utilizing two film carriage assemblies

Abstract

A film wrapping machine comprises a pair of diametrically opposed film roll mounting and dispensing carriage assemblies, mounted upon a rotary ring member, for simultaneously dispensing wrapping film. A vertically movable frame member, upon which the rotary ring member is rotatably mounted, is effectively moved at a speed of ascent or descent that is approximately twice the speed as that of a vertically movable frame member incorporated within a conventional film wrapping machine so as to permit the dual film roll mounting and dispensing carriage assemblies to dispense the wrapping or packaging film within a time frame that is approximately twice as fast as that of the conventional film wrapping machine and yet in a slightly overlapped mode as desired for packaging purposes.

Description

FIELD OF THE INVENTION

The present invention relates generally to film wrapping or packaging machines for wrapping film around articles, packages, or palletized loads, and more particularly to a new and improved film wrapping or packaging machine that has a pair of diametrically opposed film roll mounting and dispensing carriage assemblies disposed upon the rotary ring member of the film wrapping machine, which rotates around an article, package, or palletized load disposed at a wrapping or packaging station and which is being wrapped within the film wrapping or packaging material, such that both of the diametrically opposed film roll mounting and dispensing carriage assemblies can simultaneously dispense the wrapping or packaging film to be wrapped around the article, package, or palletized load disposed at the wrapping station. The rotary ring member of the film wrapping machine is mounted upon a vertically movable frame member which is effectively moved at a predetermined speed which is approximately twice the normal speed of ascent or descent as that of a conventional film wrapping machine so that the wrapping or packaging film being dispensed from both film roll mounting and dispensing carriage assemblies will overlap to a predetermined degree, and in view of the fact that both of the diametrically opposed film roll mounting and dispensing carriage assemblies effectively cooperate together in connection with the wrapping or packaging of the article, package, or palletized load disposed at the wrapping or packaging station, not only is the article, package, or palletized load able to be wrapped or packaged approximately twice as fast as with a conventional film wrapping or packaging machine, but in addition, the pair of rolls of wrapping or packaging film, respectively disposed upon the pair of diametrically opposed film roll mounting and dispensing carriage assemblies, effectively last twice as long as normal whereby they need to be replaced less often. In addition, if film depletion, or a breakage in the wrapping or packaging film, occurs upon one of the film roll mounting and dispensing carriage assemblies, the other one of the film roll mounting and dispensing carriage assemblies will continue the article, package, or palletized load wrapping or packaging operation at a reduced vertical ascent or descent speed so as to effectively simulate a wrapping or packaging machine having a single film roll mounting and dispensing carriage assembly mounted thereon.

BACKGROUND OF THE INVENTION

Film wrapping or packaging machines or apparatus, for wrapping articles, packages, or palletized loads within wrapping film, are of course well known in the art. Examples of such film wrapping machines or apparatus are disclosed within U.S. Pat. No. 6,195,961 which issued to Turfan on Mar. 6, 2001, U.S. Pat. No. 5,787,691 which issued to Turfan on Aug. 4, 1998, U.S. Pat. No. 5,517,807 which issued to Morantz on May 21, 1996, and U.S. Pat. No. 4,587,796 which issued to Haloila on May 13, 1986. As disclosed within FIG. 1, which substantially corresponds to FIG. 1 of U.S. Pat. No. 6,195,961, and which is representative of the conventional film wrapping or packaging machines, a film wrapping or packaging machine is generally indicated by the reference character 10 and is seen to comprise a four-post upstanding framework 12 through which extends a conveyor 14 for conveying articles, packages, or palletized loads, to be wrapped or packaged, to a wrapping station 16 which is located substantially at the center of the region or area which is peripherally defined by means of the upstanding posts of the framework 12.

An upper frame member 18, vertically movable in a reciprocating manner with respect to the framework 12, rotatably supports a ring or circular track member 20 upon which is mounted a plastic film roll mounting and dispensing assembly or carriage 22 upon which is mounted a roll 24 of plastic wrapping film. Consequently, when the upper frame member 18 is moved in vertically upward and downward directions, and the ring or track member 20 is rotated with respect to the vertically movable upper frame member 18, film from the film roll 24, mounted upon the film roll mounting and dispensing assembly or carriage 22, can be withdrawn therefrom and applied onto the articles, packages, or palletized loads which are to be wrapped within film packaging material and which are disposed or located at the wrapping station 16.

While the aforenoted conventional film wrapping or packaging machine is satisfactory from an overall operational point of view, it is desirable to effectively shorten the cyclic time required to wrap or package each article, package, or palletized load within the wrapping or packaging film. In addition, it is also desirable to effectively lengthen or extend the service life of the roll of wrapping or packaging film such that the need to replace the roll of wrapping or packaging film occurs less often. In this manner, more articles, packages, or palletized loads can effectively be wrapped or packaged within wrapping or packaging film dispensed from a particular roll of wrapping or packaging film than has been previously possible whereby more continuous article, package, or palletized load wrapping or packaging operations can be performed and completed without the need to replenish depleted rolls of wrapping or packaging film which necessitates a predetermined amount of operational downtime through means of a suitable wrapping or packaging film roll exchange operation.

SUMMARY OF THE INVENTION

The foregoing and other objectives are achieved in accordance with the teachings and principles of the present invention through the provision of a new and improved film wrapping or packaging machine which has a pair of diametrically opposed film roll mounting and dispensing carriage assemblies disposed upon the rotary ring member of the film wrapping machine that rotates around the article, package, or palletized load which is disposed at the wrapping or packaging station and which is being wrapped within the film wrapping or packaging material. Both of the diametrically opposed film roll mounting and dispensing carriage assemblies simultaneously dispense wrapping or packaging film to be wrapped around the article, package, or palletized load disposed at the wrapping or packaging station, and the rotary ring member of the film wrapping or packaging machine is mounted upon a vertically movable frame member that is effectively moved at a speed of ascent or descent which is approximately twice the speed of ascent or descent as that of a vertically movable frame member disposed upon a conventional film wrapping or packaging machine wherein the speed of ascent or descent of the vertically movable frame member is in fact predetermined so as to permit the dual film roll mounting and dispensing carriage assemblies to dispense the wrapping or packaging film in a slightly overlapped mode. In view of the fact that both of the diametrically opposed film roll mounting and dispensing carriage assemblies effectively cooperate together in connection with the wrapping or packaging of the article, package, or palletized load disposed at the wrapping or packaging station, the article, package, or palletized load is able to be wrapped or packaged within a time frame which is approximately twice as fast as that which can be achieved with a conventional film wrapping or packaging machine.

In addition, the pair of rolls of wrapping or packaging film, respectively disposed upon the pair of diametrically opposed film roll mounting and dispensing carriage assemblies, effectively last twice as long as similarly sized rolls of wrapping or packaging film in view of the fact that film, from each one of the pair of rolls of wrapping or packaging film, is only being effectively utilized within each one half of each film wrapping or packaging layer. Accordingly, in view of the fact that the rolls of packaging or wrapping film are depleted at a substantially slower rate than that which would be experienced within a conventional film wrapping or packaging machine, the rolls of packaging or wrapping film need to be replaced less often than similar rolls of wrapping or packaging film disposed upon a conventional film wrapping or packaging machine. Accordingly, still further, more continuous film wrapping or packaging operations can be performed, in connection with the wrapping or packaging of multiple articles, packages, or palletized loads without necessitating or experiencing operational downtime that would normally be required in order to perform film roll replenishment, replacement, or exchange operations, and if film depletion or a breakage in the wrapping or packaging film occurs upon one of the film roll mounting and dispensing carriage assemblies, the other one of the film roll mounting and dispensing carriage assemblies will continue the article, package, or palletized load wrapping or packaging operation at a reduced vertical ascent or descent speed so as to effectively simulate a wrapping or packaging machine having a single film roll mounting and dispensing carriage assembly mounted thereon.

BRIEF DESCRIPTION OF THE DRAWINGS

Various other features and attendant advantages of the present invention will be more fully appreciated from the following detailed description when considered in connection with the accompanying drawings in which like reference characters designate like or corresponding parts throughout the several views, and wherein:

FIG. 1 is a perspective view of a conventional, PRIOR ART film wrapping machine;

FIG. 2 is a perspective view of a new and improved film wrapping machine as constructed in accordance with the principles and teachings of the present invention and showing the component parts thereof;

FIG. 3 is a side elevational view of the new and improved film wrapping machine, as disclosed within FIG. 2, showing the pair of diametrically opposed film roll mounting and dispensing carriage assemblies mounted upon the rotary ring member, and the pair of film clamp assemblies mounted upon oppositely disposed, longitudinally extending beam members which are movable in transverse directions toward and away from each other so as to move the pair of film clamp assemblies between their START and FINISH positions during a film wrapping or packaging cycle operation;

FIG. 3a is a partial, enlarged view of FIG. 3 showing the left wrapping or packaging film roll mounting and dispensing carriage assembly, the details of the left wrapping or packaging film clamping assembly, and an auxiliary film clamp mechanism which is adapted to transfer the leading end portion of the wrapping or packaging film between the film tail holder of the wrapping or packaging film roll mounting and dispensing carriage assembly and the wrapping or packaging film clamping assembly;

FIG. 4 is a top plan view of the new and improved film wrapping machine, as disclosed within FIGS. 2 and 3, showing the motor drive system for the vertically movable frame member upon which the rotary ring member, and the pair of diametrically opposed film roll mounting and dispensing carriage assemblies, are mounted;

FIG. 5 is a perspective view of the vertically movable frame member, and the rotary ring member and the pair of diametrically opposed film roll mounting and dispensing carriage assemblies mounted thereon;

FIG. 6 is a bottom plan view of the rotary ring member as mounted upon the vertically reciprocable frame member by means of the various mounting bracket and wheel assemblies for not only supporting the rotary ring member as mounted upon the vertically reciprocable frame member, but in addition, for rotatably guiding the rotary movement of the rotary ring member with respect to the vertically reciprocable frame member;

FIG. 7 is a partial, enlarged, perspective view of the undersurface portion of the vertically reciprocable frame member, as illustrated within FIG. 6, showing the drive motor, the idler rollers, and the drive belt utilized for driving the rotary ring member with respect to the vertically reciprocable frame member; and

FIG. 8 is a partial, enlarged perspective view, similar to that of FIG. 7, showing, however, the various motor drive components from a different perspective point of view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to the drawings, and more particularly to FIGS. 2-5 thereof, a new and improved film wrapping or packaging machine, constructed in accordance with the principles and teachings of the present invention, is disclosed and is generally indicated by the reference character 110. More particularly, the new and improved film wrapping or packaging machine 110 is generally or briefly seen to comprise a fixed, upstanding framework 112 through which extends a conveyor mechanism, which is not shown but which is similar to the conveyor 14 as disclosed within FIG. 1, for conveying articles, packages, or palletized loads, to be wrapped or packaged, in a conveying direction CD to a wrapping or packaging station 116 which is located substantially at the center of the region or area which is peripherally defined by means of the upstanding posts of the fixed upstanding framework 112. A frame member 118, which is vertically movable in a reciprocating manner with respect to the fixed upstanding framework 112, rotatably supports a ring or circular track member 120, and in accordance with a unique and novel feature or structure characteristic of the present invention, a pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, upon which rolls of wrapping or packaging film, not shown, are disposed, are fixedly secured upon the rotary ring member 120. In this manner, the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 will be movable with the rotary ring member 120 so as to move or rotate around the wrapping station 116 in order to package or wrap articles, packages, or palletized loads, disposed at the wrapping station 116, within the wrapping or packaging film which is being dispensed from the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 during the performance of a wrapping or packaging operation.

Continuing further, and with reference being specifically made to FIG. 2, it is seen that the fixed, upstanding framework 112 comprises four vertically oriented upstanding posts 126, 128, 130, 132, and that in order to properly control the conveyor mechanism, not shown, for conveying the articles, packages, or palletized loads into and out from the wrapping or packaging station 116, a first pair of phototransmitters 134, 136 are mounted upon a lower end portion of the upstanding post 128, while a first pair of photoreflectors 138, 140 are mounted upon a lower end portion of the oppositely disposed upstanding post 132 so as to be respectively disposed opposite the phototransmitters 134, 136. In a similar manner, three phototransmitters 142, 144, 146 are mounted upon a lower end portion of the upstanding post 126, while three photoreflectors 148, 150, 152 are mounted upon a lower end portion of the oppositely disposed upstanding post 130 so as to be respectively disposed opposite the phototransmitters 142, 144. More particularly, it is noted that the cooperative pairs of phototransmitters and photoreflectors 136, 140 and 142, 148 comprise safety sensor mechanisms so as to ensure that operator personnel are not within undesirable perimeter areas of the film wrapping or packaging machine 110 which are located adjacent to, for example, the conveyor mechanism, not shown, conveying the articles, packages, or palletized loads toward the wrapping or packaging station 116. Alternatively, for example, another article, package, or palletized load, other than the particular article, package, or palletized load disposed upon the conveyor and being conveyed toward the wrapping or packaging station 116, may be disposed within such perimeter areas of the film wrapping or packaging machine 110 so as to present a potential hazard to the operation of the film wrapping or packaging machine 110.

In either one of these instances, a signal would be sent to a programmable logic controller PLC, which is schematically illustrated and which controls all movements of all of the components of the film wrapping or packaging machine 110, so as to temporarily terminate operation of the film wrapping or packaging machine 110 until the aforenoted potentially hazardous situation or condition is corrected or satisfactorily resolved. Still yet further, the cooperative pair of phototransmitter and photoreflector 134, 138 comprise a first article, package, or palletized load sensor mechanism or system whereby the forward, leading, or downstream end portion of the article, package, or palletized load, disposed upon the conveyor mechanism, not shown, will be sensed as the article, package, or palletized load is being conveyed toward the wrapping or packaging station 116, and wherein further, the first article, package, or palletized load sensor mechanism or system, comprising the cooperative pair of phototransmitter and photoreflector components 134, 138, will therefore transmit a signal to the programmable logic controller PLC that a film wrapping or packaging operation is about to be commenced. In a similar manner, the cooperative pair of phototransmitter and photoreflector 146, 152 comprise a second article, package, or palletized load sensor mechanism or system whereby the forward, leading, or downstream end portion of the article, package, or palletized load, disposed upon the conveyor, not shown, will again be sensed as the article, package, or palletized load is being conveyed into and within the wrapping or packaging station 116, and wherein further, the second article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 146, 152 will therefore transmit a signal to the programmable logic controller PLC to the effect that the activation of the conveyor mechanism, not shown, should be terminated so as to effectively locate the article, package, or palletized load at a substantially central portion within the wrapping or packaging station 116 in order to properly perform a film wrapping or packaging operation.

Lastly, the cooperative pair of phototransmitter and photoreflector 144, 150 comprise, in effect, a third, failsafe article, package, or palletized load sensor mechanism or system. Accordingly, if the forward, leading, or down-stream end portion of the article, package, or palletized load, disposed upon the conveyor, not shown, is sensed by means of the third article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 144, 150, such as, for example, if the second article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 146, 152 experiences a failure, or alternatively, if the article, package, or palletized load, disposed upon the conveyor, should experience slippage relative to the conveyor when the movement of the conveyor is terminated, then the third article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 144, 148 will transmit a signal to the programmable logic controller PLC to the effect that not only should the activation of the conveyor mechanism, not shown, be terminated, but in addition, that the entire film wrapping or packaging machine 110 should effectively be temporarily shut down so as to not to commence a faulty film wrapping or packaging operation in connection with the article, package, or palletized load which is not properly located at the wrapping station 116.

This is similarly the case with the first article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 134, 138. More particularly, the first article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 134, 138 also acts or serves as a failsafe mechanism in that when the particular article, package, or palletized load has been conveyed toward the wrapping or packaging station 116, the rear, trailing, or upstream end portion of the article, package, or palletized load must likewise clear the first article, package, or palletized load sensor mechanism or system comprising the cooperative pair of phototransmitter and photoreflector components 134, 138 so as to effectively ensure that a properly sized article, package, or palletized load is in fact located, and properly positioned, at the wrapping or packaging station 116 so as to in fact be readied for undergoing a film wrapping or packaging operation.

As can also be best appreciated from FIG. 2, each one of the four vertically upstanding posts 126, 128, 130, 132 comprising the fixed, upstanding framework 112 is noted as comprising, in effect, an angle iron structure having a substantially L-shaped cross-sectional configuration such that inner surface portions of each one of the substantially L-shaped vertically upstanding posts 126, 128, 130, 132 are effectively disposed at 90°, or perpendicular, with respect to each other. In addition, and in connection with such inner surface portions of the plurality of vertically upstanding posts 126, 128, 130, 132 disposed perpendicular with respect to each other, each one of the external corner regions 154, 156, 158, 160 of the vertically movable frame member 118, which has a substantially square shaped configuration, has a pair of wheels, the axes of which are also correspondingly disposed at 90° or perpendicular with respect to each other, rotatably mounted upon such external corner region 154, 156, 158, 160 of the vertically movable frame member 118. More particularly, as can best be seen from FIG. 5, a first pair of wheels 162, 164 are rotatably mounted upon suitable mounting bracket structure fixedly mounted upon the external corner region 154 of the vertically movable frame member 118, while a second pair of wheels 166, 168 are rotatably mounted upon suitable mounting bracket structure fixedly mounted upon the external corner region 156 of the vertically movable frame member 118.

In a similar manner, a third pair of wheels, only one of which is visible at 170, are rotatably mounted upon suitable mounting bracket structure fixedly mounted upon the external corner region 158 of the vertically movable frame member 118, while a fourth pair of wheels, only one of which is visible at 172, are rotatably mounted upon suitable mounting bracket structure fixedly mounted upon the external corner region 160 of the vertically movable frame member 118. In this manner, the vertically movable frame member 118 is in fact able to be smoothly moved along the interior, vertically oriented surfaces of the substantially L-shaped, vertically upstanding posts 126, 128, 130, 132, in vertically upward and downward directions, in accordance with particular cyclically staged movements occurring during the performance of a particular article, package, or palletized load wrapping or packaging operation.

Continuing further, in order to drive or move the vertically movable frame member 118 between its uppermost and lowermost positions during a film wrapping or packaging operation, a first reversible drive motor 174 is fixedly mounted upon a first upper end frame member 176 of the fixed, upstanding framework 112 by means of a suitable mounting plate, mounting bracket, or mounting block 178 which is fixedly or integrally secured to the first upper end frame member 176 of the fixed, upstanding framework 112 as can best be seen in FIG. 4. In addition, it is also seen that the first reversible drive motor 174 is provided with first and second oppositely oriented output drive shafts 180, 182 upon which there is respectively disposed first and second output drive sprockets 184, 186. First and second output driven sprockets 188, 190 are respectively fixedly mounted upon first end portions of the first and second driven shafts 192, 194, and it is seen that the first and second driven shafts 192, 194 are respectively rotatably mounted within first and second bearing members 196, 198 which are, in turn, respectively mounted upon first and second bearing blocks or bearing brackets 200, 202 that are also fixedly mounted upon the first upper end frame member 176 of the fixed, upstanding framework 112.

The first and second output drive sprockets 184, 186, respectively disposed upon the first and second oppositely oriented output drive shafts 180, 182 of the reversible drive motor 174, are respectively operatively connected to the first and second output driven sprockets 188, 190, respectively disposed upon first end portions of the first and second driven shafts 192, 194, by means of first and second endless drive sprocket chains 204, 206, and it is further seen that the oppositely disposed second end portions of the first and second driven shafts 192, 194 are respectively rotatably mounted within third and fourth bearing members 208, 210 which are, in turn, respectively mounted upon third and fourth bearing blocks or bearing brackets 212, 214 which are also fixedly mounted upon the first upper end frame member 176. Still yet further, it is also seen that the distal or free end portions of the first and second driven shafts 192, 194 are respectively provided with third and fourth output driven sprockets 216, 218, while axially inboard regions of the first and second driven shafts 192, 194, disposed upon the opposite side of, and adjacent to, the third and fourth bearing members 208, 210, are respectively provided with fifth and sixth output driven sprockets 220, 222. Upon the opposite side of the overall fixed, upstanding framework 112, and in particular, upon a second upper end frame member 224 of the fixed, upstanding framework 112, which is disposed opposite the first upper end frame member 176 of the fixed, upstanding framework 112, third and fourth driven shafts 226, 228 are adapted to be rotatably mounted.

More particularly, it is seen that the axially outboard end portion of the third driven shaft 226 is rotatably mounted within a fifth bearing member 230 which is mounted upon a fifth bearing block or bearing bracket 232 that is fixedly mounted upon the second upper end frame member 224, and in a similar manner, the axially outboard end portion of the fourth driven shaft 228 is rotatably mounted within a sixth bearing member 234 which is mounted upon a sixth bearing block or bearing bracket 236 that is likewise fixedly mounted upon the second upper end frame member 224. Still further, it is also seen that the axially inboard end portion of the third driven shaft 226 is rotatably mounted within a seventh bearing member 238 which is mounted upon a seventh bearing block or bearing bracket 240 that is also fixedly mounted upon the second upper end frame member 224, and in a similar manner, the axially inboard end portion of the fourth driven shaft 228 is rotatably mounted within an eighth bearing member 242 which is mounted upon an eighth bearing block or bearing bracket 244 that is likewise fixedly mounted upon the second upper end frame member 224, the axially inboard end portions of the third and fourth driven shafts 226, 228 also being operatively connected together by means of a suitable coupling member 246.

Continuing still further, it is additionally seen that seventh and eighth output driven sprockets 248, 250 are respectively disposed upon the distal end portions of the third and fourth driven shafts 226, 228, and that ninth and tenth output driven sprockets 252, 254 are respectively disposed upon the axially inboard sides of the third and fourth driven shafts 226, 228 at positions adjacent to the fifth and sixth bearing members 230, 234. As can best be seen in FIGS. 2 and 3, and taken in conjunction with FIG. 4, a first vertically oriented endless driven sprocket chain 256, fixedly connected at an intermediate portion thereof to the frame member 118, has its upper end portion disposed around the third output driven sprocket 216 disposed upon the distal end portion of the first driven shaft 192, while the lower end portion of the first endless driven sprocket chain 256 is disposed within a first sprocket chain housing 258 mounted upon a lower end portion of the vertically oriented upstanding post 126 of the fixed upstanding framework 112. In a similar manner, a second vertically oriented endless driven sprocket chain 260, fixedly connected at an intermediate portion thereof to the frame member 118, has its upper end portion disposed around the fourth output driven sprocket 218 disposed upon the distal end portion of the second driven shaft 194, while the lower end portion of the second endless driven sprocket chain 260 is disposed within a second sprocket chain housing 262 mounted upon a lower end portion of the vertically oriented upstanding post 128 of the fixed upstanding framework 112.

Still further, a third vertically oriented endless driven sprocket chain 264, also fixedly connected at an intermediate portion thereof to the frame member 118, has its upper end portion disposed around the seventh output driven sprocket 248 disposed upon the distal end portion of the third driven shaft 226, while the lower end portion of the third endless driven sprocket chain 264 is disposed within a third sprocket chain housing 266 mounted upon a lower end portion of the vertically oriented upstanding post 130 of the fixed upstanding framework 112. Furthermore, a fourth vertically oriented endless driven sprocket chain 268, also fixedly connected at an intermediate portion thereof to the frame member 118, has its upper end portion disposed around the eighth output driven sprocket 250 disposed upon the distal end portion of the fourth driven shaft 228, while the lower end portion of the fourth endless driven sprocket chain 268 is disposed within a fourth sprocket chain housing 270 mounted upon a lower end portion of the vertically oriented upstanding post 132 of the fixed upstanding framework 112.

Still yet further, it is also seen that a first horizontally oriented sprocket chain 272 is disposed around the fifth and ninth output driven sprockets 220, 252, while a second horizontally oriented sprocket chain 274 is disposed around the sixth and tenth output driven sprockets 222, 254. Accordingly, when the first reversible drive motor 174 is actuated so as to, for example, drive the sprocket chains 256, 260, 264, 268 in either direction, that is, to lower or to raise the frame member 118, rotary drive to the vertically oriented sprocket chains 256, 260 will be achieved by means of the driven shafts 192, 194 and the driven sprockets 216, 218, whereas rotary drive to the vertically oriented sprocket chains 264, 268 will be achieved by means of the driven shafts 192, 194, the driven sprockets 220, 222, the horizontally oriented sprocket chains 272, 274, the driven sprockets 252, 254, the driven shafts 226, 228, and the sprockets 248, 250.

With reference now being made to FIGS. 3 and 5-8, the system for mounting the rotary ring member 120 upon the vertically reciprocable frame member 118, as well as the system for rotating the rotary ring member 120 with respect to the vertically reciprocable frame member 118, will now be described. More particularly, as can best be appreciated from FIG. 6, the vertically reciprocable frame member 118 has four substantially triangularly configured mounting brackets or mounting plates 276, 278, 280, 282 fixedly mounted thereon, and each one of the mounting brackets or mounting plates 276, 278, 280, 282 is respectively provided with a horizontally oriented wheel 284, 286, 288, 290 for engaging a vertically oriented external annular surface portion 292 of the rotary ring member 120. In addition, each one of the mounting brackets or mounting plates 276, 278, 280, 282 is also respectively provided with a vertically oriented wheel 294, 296, 298, 300 for engaging a horizontally oriented external undersurface portion 302 of the rotary ring member 120 whereby the rotary ring member 120 is in fact supported upon such vertically oriented wheels 294, 296, 298, 300. Still further, it is also seen that a first side beam member 304 of the frame member 118 is provided with a mounting bracket 306 upon which a fifth horizontally oriented wheel 308 is rotatably mounted so as to be rotatably engaged with the vertically oriented external annular surface portion 292 of the rotary ring member 120, as well as fifth and sixth vertically oriented wheels 310, 312 which are rotatably mounted upon the mounting bracket 306 so as to be rotatably engaged with the horizontally oriented external undersurface portion 302 of the rotary ring member 120. In a similar manner, a second oppositely disposed side beam member 314 of the frame member 118 is provided with a mounting bracket 316 upon which a sixth horizontally oriented wheel 318 is rotatably mounted so as to also be rotatably engaged with the vertically oriented external annular surface portion 292 of the rotary ring member 120, as well as seventh and eighth vertically oriented wheels 320, 322 which are rotatably mounted upon the mounting bracket 316 so as to be rotatably engaged with the horizontally oriented external undersurface portion 302 of the rotary ring member 120.

As can best be seen in FIG. 5, in order to provide for the relative rotation of the rotary ring member 120, and the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 mounted thereon, with respect to the vertically reciprocable frame member 118, a second, vertically oriented drive motor 324 is fixedly mounted in a dependent manner upon an undersurface portion of the first side beam member 304 of frame member 118 within the vicinity of the triangularly configured mounting bracket 276. In addition, as can best be seen from FIGS. 7 and 8, the output drive shaft 326 of the second, vertically oriented drive motor 324 has an output drive pulley 328 fixedly mounted thereon for rotation with the output drive shaft 326, and a pair of idler or driven pulleys 330, 332 are rotatably mounted upon a substantially L-shaped mounting bracket or mounting plate 333 which is pivotally mounted upon the frame member 118 about an axis which effectively coincides with the axis of the idler or driven pulley 330. In addition, an endless pulley drive belt 334 is disposed around the motor drive pulley 328, routed around an external circumferential portion of the idler or driven pulley 332, routed around the external peripheral portion of the rotary ring member 120, routed back around an external circumferential portion of the idler or driven pulley 330, and routed back around the motor drive pulley 328. It is lastly noted that a turnbuckle mechanism 336 is operatively connected to the substantially L-shaped mounting bracket or mounting plate 333, through means of a crank mechanism, not shown, whereby rotation of the turnbuckle mechanism 336 can pivotally adjust the relative disposition of the substantially L-shaped mounting bracket or mounting plate 333 and the idler or driven pulley 332 with respect to, for example, the motor drive pulley 328 and the idler or driven pulley 330. In this manner, a predetermined amount of tension can be impressed upon or imparted to the endless pulley belt 334 disposed around the external peripheral portion of the rotary ring member 120.

With reference now being made to FIGS. 3 and 5, it is seen that a pair of diametrically opposed wrapping or packaging film clamping assemblies 338, 340, which are adapted to be operatively associated with the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, as will become more apparent hereinafter, are respectively fixedly mounted in a dependent manner upon a pair of cross-beam members 342, 344. As can best be seen in FIGS. 4 and 5, the upper or left end portion of the cross-beam member 342, as viewed in FIGS. 4 and 5, is fixedly connected, such as, for example, by means of a suitable welding process, to a linear bearing housing member 346 containing a linear bearing member, not shown, and the linear bearing member, not shown, is operatively engaged with, or effectively rides upon, a rail or track member 348 so as to effectively be capable of linear translational movement along the same. In a similar manner, the right or lower end portion of the cross-beam member 344, as viewed in FIGS. 4 and 5, is fixedly connected to a linear bearing housing member 350 which likewise contains a linear bearing member, not shown, which is operatively engaged with a rail or track member 351, which can best be seen in FIG. 4, so as to likewise effectively be capable of linear translational movement therealong. A piston-cylinder assembly 352 is fixedly mounted upon the frame member 118 such that the free or distal end portion of the piston rod of the piston-cylinder assembly 352 is operatively connected to the linear bearing housing member 346, and in a similar manner, another piston-cylinder assembly 353, also best seen in FIG. 4, is fixedly mounted upon the frame member 118 such that the free or distal end portion of the piston rod of the piston-cylinder assembly 353 is operatively connected to the linear bearing housing member 350.

The upper or left end portion of the cross-beam member 344, as viewed in FIGS. 4 and 5, is movably mounted upon a track, or within a channel 355, as can best be seen in FIG. 4, which is disposed upon the frame member 118 beneath the piston-cylinder assembly 352, while in a similar manner, the lower or right end portion of the cross-beam member 342, as viewed in FIGS. 4 and 5, is likewise movably mounted upon a track, or within a channel 357, as best seen in FIG. 4, which is disposed upon the frame member 118 beneath the piston-cylinder assembly 353 operatively connected to the linear bearing housing member 350. In this manner, when the piston rods of the piston-cylinder assemblies 352, 353 are extended or retracted either independently or in unison, the cross-beam members 342, 344, having the wrapping or packaging film clamping assemblies 338, 340 disposed thereon, will be respectively moved toward and away from the side beam members 304, 314 so as to respectively position the wrapping or packaging film clamping assemblies 338, 340 away from or adjacent to the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124. The wrapping or packaging film clamping assemblies 338, 340 are substantially identical with respect to each other, and it is noted that they are disposed upon their respective cross-beam members 342, 344 in the same orientations so as to be capable of operation at their diametrically opposed positions with respect to their respective wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124.

In connection with the structural composition of each one of the wrapping or packaging film clamping assemblies 338, 340, and with wrapping or packaging film clamping assembly 338 being exemplary as can best be appreciated from FIGS. 3 and 3a, it is seen that the wrapping or packaging film clamping assembly 338 comprises a vertically oriented, semi-cylindrical hollow tubular member 354, and a vertically oriented cylindrically configured clamping rod 356. The entire film clamping assembly 338 is pivotally mounted upon a mounting bracket 358, as best seen in FIG. 5, so as to be movable between a first inoperative position, to which the film clamping assembly 338 will have been moved into the page as viewed in FIG. 3a, and a second operative position at which the film clamping assembly 338 will be disposed at its illustrated position within FIG. 3a. The upper end portion of the vertically oriented cylindrically configured clamping rod 356 is also pivotally mounted upon the mounting bracket 358 so as to effectively be movable, by means of suitable mechanisms not shown, with respect to the semi-cylindrical tubular member 354 between an OPEN film insertion position, wherein the vertically oriented cylindrically configured clamping rod 356 is effectively disposed out of the page as illustrated within FIG. 3a, and a CLOSED film clamping position as illustrated within FIG. 3a.

In addition, an auxiliary film clamping mechanism 360 is pivotally mounted upon the mounting bracket 358 for effectively transferring the leading end or film tail portion of the wrapping or packaging film, disposed upon the wrapping or packaging film roll mounting and dispensing carriage assembly 122, from a film tail holder, not shown, of the wrapping or packaging film roll mounting and dispensing carriage assembly 122 to a position at which the package wrapping or packaging operation can be commenced after a new or fresh roll of wrapping or packaging film is mounted upon the wrapping or packaging film roll mounting and dispensing carriage assembly 122, all as more fully set forth within copending patent application entitled AUTOMATIC FILM CHANGER FOR A FILM WRAPPING MACHINE, Ser. No. ______, which is hereby incorporated herein by reference. Still further, a film cutting device, in the form of a heated wire 362, is also mounted upon the wrapping or packaging film clamping assembly 338, at a position adjacent to the film clamping tubular member 354 and clamping rod 356, so as to effectively sever the wrapping or packaging film upon completion of a package wrapping or packaging cycle, and still yet further, a plurality of vertically spaced heated sealers 364 are provided for sealing the severed trailing end portion of the wrapping or packaging film onto the wrapped or packaged load.

Having described all of the pertinent structural components of the new and improved film wrapping or packaging machine 110 constructed in accordance with the principles and teachings of the present invention, a brief description of the operation of the same will now be set forth. More particularly, assuming that a package, to be wrapped or packaged within wrapping or packaging film, is already disposed at the wrapping or packaging station 116, the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 are disposed at their START positions, as illustrated within FIG. 5, so as to both begin or commence a package wrapping or packaging cycle, that is, during a package wrapping or packaging cycle or operation, wrapping or packaging film will be simultaneously dispensed from both of the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124. It is noted, at this point in time, that the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 have, for example, been provided with new or fresh rolls of wrapping or packaging film, wherein the free, leading end or film tail portions of the new or fresh rolls of wrapping or packaging film are disposed within the auxiliary film clamp mechanisms 360, which are operatively associated with the wrapping or packaging film clamping assemblies 338, 340, as a result of the programmable logic controller PLC having caused the auxiliary film clamp mechanisms 360 to have grasped the free, leading end or film tail portions of the wrapping or packaging film, disposed within the film tail holders, not shown, of the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, and having subsequently pivoted the auxiliary film clamp mechanisms 360 so as to move such free, leading end or film tail portions from the film tail holders to positions at which the film wrapping or packaging operation can be commenced. Alternatively, after having completed a previous package wrapping or packaging cycle or operation, the free end portions of the rolls of wrapping or packaging film, already disposed upon the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, will be disposed within the wrapping or packaging film clamping assemblies 338, 340, that is, secured between the clamping rod 356 and the film clamping tubular member 354.

Subsequently, the programmable logic controller PLC initiates operation of the second, vertically oriented drive motor 324 so as to cause rotation of the rotary ring member 120, and the pair of diametrically opposed wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 disposed thereon, in the counterclockwise direction, and in addition, and at substantially the same time, the programmable logic controller PLC also initiates operation of the first reversible drive motor 174 so as to drive or move the vertically movable frame member 118, having the rotary ring member 120 rotatably mounted thereon, between its uppermost and lowermost positions during the film wrapping or packaging operation. It is to be noted that, depending upon predetermined or particular wrapping or packaging preferences, operational modes, or the packages or articles to be wrapped or packaged, the vertically movable frame member 118 may initially be disposed at its lowermost position such that the same will ascend during a package wrapping or packaging operation, or alternatively, the vertically movable frame member 118 may initially be disposed at its uppermost position whereby the same will descend during a package wrapping or packaging operation.

In accordance with the unique principles and teachings of the present invention, it is further noted that the vertically movable frame member 118 is effectively moved at a predetermined speed, as controlled by means of the programmable logic controller PLC, which is approximately twice the normal speed of ascent or descent as that of a conventional film wrapping machine so that the wrapping or packaging film being dispensed from both of the film roll mounting and dispensing carriage assemblies 122, 124 will only overlap a predetermined amount or degree. It can therefore be appreciated that since both of the diametrically opposed film roll mounting and dispensing carriage assemblies 122, 124 effectively cooperate together in connection with the wrapping or packaging of the article, package, or palletized load disposed at the wrapping or packaging station 116, not only is the article, package, or palletized load able to be wrapped or packaged approximately twice as fast as that able to be accomplished by means of a conventional film wrapping or packaging machine, but in addition, the pair of rolls of wrapping or packaging film, respectively disposed upon the pair of diametrically opposed film roll mounting and dispensing carriage assemblies 122, 124, effectively last twice as long as normal, that is, they can be utilized in connection with approximately twice the number of package wrapping or packaging operations, whereby they need to be replaced less often.

Continuing further, at the conclusion of a particular package wrapping or packaging cycle or operation, the programmable logic controller PLC will actuate the piston-cylinder assemblies 352, 353 so as to move the cross-beams 342, 344 away from each other and thereby cause the wrapping or packaging film clamping assemblies 338, 340 to be disposed adjacent to the film roll mounting and dispensing carriage assemblies 122, 124 that have been stopped at, or effectively returned to, their START positions as illustrated within FIG. 5. Subsequently, the programmable logic controller PLC will actuate the mechanisms, not shown, controlling the pivotal movements of the film clamping tubular member and clamping rod components 354, 356 of the wrapping or packaging film clamping mechanisms 338, 340 so as to pivotally move the same to their downward positions, and still further, the programmable logic controller PLC will also actuate the mechanisms, not shown, for controlling the pivotal movements of the clamping rods 356, that are respectively disposed upon the wrapping or packaging film clamping assemblies 338, 340, so as to effectively move the clamping rods 356, out of the page as illustrated within FIG. 3a, to their OPEN positions with respect to their semi-cylindrical hollow tubular members 354. The programmable logic controller PLC will then actuate the second, vertically oriented drive motor 324 so as to again cause rotation of the rotary ring member 120 in the counterclockwise direction so as to move the pair of wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 to predetermined angular positions just past or beyond the wrapping or packaging film clamping assemblies 338, 340.

Subsequently still further, the programmable logic controller PLC will again actuate the mechanisms, not shown, controlling the pivotal movements of the clamping rods 356 so as to now effectively move the clamping rods 356, back into the page as illustrated in FIG. 3a, to their CLOSED positions with respect to their semi-cylindrical hollow tubular members 354 so as to effectively clamp portions of the packaging or wrapping film therebetween, and in addition, the programmable logic controller PLC will again actuate the second, vertically oriented drive motor 324 so as to cause rotation of the rotary ring member 120 in the reverse or clockwise direction so as to effectively move or return the pair of wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124 back to their START positions. Accordingly, it can be appreciated that the wrapping or packaging film effectively becomes wrapped around the clamping rods 356 of the wrapping or packaging film clamping assemblies 338, 340. Still yet further, at substantially this point in time, the programmable logic controller PLC will also cause the film cutting wires 362 to be heated such that as the clamping rods 356 are moved toward their CLOSED positions, portions of the wrapping or packaging film will be forced into contact with the heated wires 362 thereby severing the wrapping or packaging films. The trailing end portions of the wrapping or packaging films, which form part of the wrapping or packaging film disposed upon or wrapped around the wrapped or packaged articles, packages, or palletized loads, will then be wiped, pressed, and sealed onto the wrapped or packaged articles, packages, or palletized loads by, for example, the plurality of vertically spaced heated sealers 364, so as to effectively complete the wrapping or packaging operation with respect to the article, package, or palletized load that has just been wrapped or packaged, while leading end portions of the wrapping or packaging films will be retained within the wrapping or packaging film clamping assemblies 338, 340, by means of the tubular cylinders and clamping rods 354, 364, in preparation for the commencement or start of a new wrapping or packaging cycle or operation. It is of course to be understood that at the commencement or start of such a new wrapping or packaging cycle or operation, after a predetermined number of wrapping or packaging film layers have been wrapped around the article or object to be wrapped or packaged, the tubular cylinders and clamping rods 354, 364 of the film clamping assemblies 338, 340 will release the leading end portions of the wrapping or packaging films.

Lastly, it is also to be noted that if one of the rolls of film, disposed upon either one of the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, becomes depleted or experiences a breakage, such a condition will be sensed, such as, for example, by means of a tension roller, not shown but disclosed within the aforenoted copending patent application entitled AUTOMATIC FILM CHANGER FOR A FILM WRAPPING MACHINE, Ser. No. ______ Subsequently, a signal will be sent from the tension roller to the programmable logic controller PLC, and accordingly, the programmable logic controller PLC will send an appropriate signal to the first reversible drive motor 174 in order to adjust the rate of ascent or descent of the vertically movable frame member 118 so as to effectively simulate a conventional film wrapping or packaging machine comprising only a single wrapping or packaging film roll mounting and dispensing carriage assembly. In this manner, despite the occurrence of the depletion or breakage of the wrapping or packaging film upon one of the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124, the package wrapping or packaging cycle or operation can continue until the package wrapping or packaging cycle or operation is completed. At such point in time, the depleted roll of wrapping or packaging film can be replaced with a new or fresh roll of wrapping or packaging film, or alternatively, the roll of wrapping or packaging film which experienced the breakage in the film can effectively have its leading end or film tail portion reinserted within the film tail holder operatively associated with the particular one of the wrapping or packaging film clamping assemblies 338, 340 disposed upon the particular one of the wrapping or packaging film roll mounting and dispensing carriage assemblies 122, 124.

Thus, it may be seen that in accordance with the principles and teachings of the present invention, there has been disclosed a new and improved film wrapping or packaging machine wherein the pair of diametrically opposed film roll mounting and dispensing carriage assemblies simultaneously dispense the wrapping or packaging film, and wherein further, the vertically movable frame member is effectively moved at a speed of ascent or descent which is approximately twice the speed of ascent or descent as that of a vertically movable frame member disposed upon a conventional film wrapping or packaging machine so as to nevertheless permit the dual film roll mounting and dispensing carriage assemblies to dispense the wrapping or packaging film in a slightly overlapped mode. In view of the fact that both of the diametrically opposed film roll mounting and dispensing carriage assemblies effectively cooperate together, the article, package, or palletized load is able to be wrapped or packaged within a time frame which is approximately twice as fast as that which can be achieved with a conventional film wrapping or packaging machine.

In addition, the pair of rolls of wrapping or packaging film effectively last twice as long as similarly sized rolls of wrapping or packaging film in view of the fact that film, from each one of the pair of rolls of wrapping or packaging film, is only being effectively utilized within each one half of each film wrapping or packaging layer. Accordingly, in view of the fact that the rolls of packaging or wrapping film are depleted at a substantially slower rate than that which would be experienced within a conventional film wrapping or packaging machine, the rolls of packaging or wrapping film need to be replaced less often than similar rolls of wrapping or packaging film disposed upon a conventional film wrapping or packaging machine. Accordingly, still further, more continuous film wrapping or packaging operations can be performed, in connection with the wrapping or packaging of multiple articles, packages, or palletized loads without necessitating or experiencing operational downtime that would normally be required in order to perform film roll replenishment, replacement, or exchange operations. Lastly, if film depletion, or a breakage in the wrapping or packaging film, occurs within one of the film rolls of one of the film roll mounting and dispensing carriage assemblies, the other one of the film roll mounting and dispensing carriage assemblies will continue the article, package, or palletized load wrapping or packaging operation at a reduced vertical ascent or descent speed so as to effectively simulate a wrapping or packaging machine having a single film roll mounting and dispensing carriage assembly mounted thereon.

Obviously, many variations and modifications of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the present invention may be practiced otherwise than as specifically described herein.

Claims

1. A film wrapping machine for wrapping articles within wrapping film, comprising:

an upstanding framework;

a wrapping station, defined within said upstanding framework, at which an article to be wrapped is adapted to be disposed during an article wrapping operation;

a vertically movable frame member mounted upon said upstanding framework;

first motor drive means for moving said vertically movable frame member in a vertically reciprocal manner;

a rotary ring member mounted upon said vertically movable frame member;

second motor drive means for causing said rotary ring member to undergo rotary movement around said wrapping station at which the article to be wrapped is disposed; and

multiple film roll mounting and dispensing carriage assembly means mounted upon said rotary ring member for simultaneously dispensing wrapping film so as to simultaneously wrap the article, to be wrapped and disposed at said wrapping station, within wrapping film.

2. The film wrapping machine as set forth in claim 1, wherein:

said multiple film roll mounting and dispensing carriage assembly means comprises a pair of film roll mounting and dispensing carriage assemblies.

3. The film wrapping machine as set forth in claim 2, wherein:

said pair of film roll mounting and dispensing carriage assemblies are mounted upon said rotary ring member at diametrically opposed positions.

4. The film wrapping machine as set forth in claim 3, further comprising:

control means for controlling said first motor drive means such that said first motor drive means moves said vertically movable frame member at a first predetermined rate of speed which permits said pair of film roll mounting and dispensing carriage assemblies to simultaneously dispense the wrapping film, so as to simultaneously wrap the article to be wrapped and disposed at said wrapping station, in wrapping film within a time frame which is substantially shorter than that which would otherwise be achieved utilizing a single film roll mounting and dispensing carriage assembly.

5. The film wrapping machine as set forth in claim 4, wherein:

said control means comprises a programmable logic controller.

6. The film wrapping machine as set forth in claim 4, wherein:

said control means for controlling said first motor drive means will control said first motor drive means such that said first motor drive means moves said vertically movable frame member at a second predetermined rate of speed that is approximately one half of said first predetermined rate of speed so as to permit a first one of said pair of film roll mounting and dispensing carriage assemblies to continue wrapping the article, to be wrapped and disposed at said wrapping station, in wrapping film if the wrapping film disposed upon a second one of said pair of film roll mounting and dispensing carriage assemblies experiences a condition comprising one of depletion and breakage.

7. The film wrapping machine as set forth in claim 2, further comprising:

a pair of film clamping mechanisms respectively operatively associated with said pair of film roll mounting and dispensing assemblies for holding leading end portions of the wrapping films in order to commence film wrapping operations.

8. The film wrapping machine as set forth in claim 7, further comprising:

a pair of beam members upon which said pair of film clamping mechanisms are respectively mounted; and

means for movably mounting said pair of beam members upon said vertically movable frame member so as to move said pair of beam members, and said pair of film clamping mechanisms mounted thereon, toward and away from said pair of film roll mounting and dispensing assemblies.

9. The film wrapping machine as set forth in claim 8, wherein:

said means for movably mounting said pair of beam members comprises piston-cylinder assemblies.

10. The film wrapping machine as set forth in claim 8, further comprising:

a pair of auxiliary film clamping means respectively mounted upon said pair of beam members for removing film tail portions of the wrapping films from said pair of film roll mounting and dispensing assemblies in order to prepare for the commencement of film wrapping operations utilizing new rolls of wrapping film.

11. A method of wrapping articles within wrapping film, comprising the steps of:

providing an upstanding framework;

defining a wrapping station within said upstanding framework at which an article to be wrapped is adapted to be disposed during an article wrapping operation;

mounting a vertically movable frame member upon said upstanding framework;

mounting a rotary ring member upon said vertically movable frame member;

mounting multiple film roll mounting and dispensing carriage assemblies upon said rotary ring member; and

vertically moving said vertically movable frame member while rotating said rotary ring member such that said multiple film roll mounting and dispensing carriage assemblies, mounted upon said rotary ring member, can simultaneously dispense wrapping film so as to simultaneously wrap the article, to be wrapped and disposed at said wrapping station, within wrapping film.

12. The method as set forth in claim 11, further comprising the step of:

using a pair of film roll mounting and dispensing carriage assemblies as said multiple film roll mounting and dispensing carriage assemblies.

13. The method as set forth in claim 12, further comprising the step of:

mounting said pair of film roll mounting and dispensing carriage assemblies at diametrically opposed positions upon said rotary ring member.

14. The method as set forth in claim 13, further comprising the step of:

controlling the vertical movement of said vertically movable frame member at a first predetermined rate of speed which permits said pair of film roll mounting and dispensing carriage assemblies to simultaneously dispense the wrapping film, so as to simultaneously wrap the article to be wrapped and disposed at said wrapping station, in wrapping film within a time frame which is substantially shorter than that which would otherwise be achieved utilizing a single film roll mounting and dispensing carriage assembly.

15. The method as set forth in claim 14, further comprising the steps of:

utilizing a variable speed drive motor to drive said vertically movable frame member; and

utilizing a programmable logic controller to control said variable speed drive motor.

16. The method as set forth in claim 14, further comprising the step of:

controlling the vertical movement of said vertically movable frame member at a second predetermined rate of speed that is approximately one half of said first predetermined rate of speed so as to permit a first one of said pair of film roll mounting and dispensing carriage assemblies to continue wrapping the article, to be wrapped and disposed at said wrapping station, in wrapping film if the wrapping film disposed upon a second one of said pair of film roll mounting and dispensing carriage assemblies experiences a condition comprising one of depletion and breakage.

17. The method as set forth in claim 12, further comprising the step of:

respectively providing a pair of film clamping mechanisms to be operatively associated with said pair of film roll mounting and dispensing assemblies for holding leading end portions of the wrapping films in order to commence film wrapping operations.

18. The method as set forth in claim 17, further comprising the steps of:

respectively mounting said pair of film clamping mechanisms upon a pair of beam members; and

movably mounting said pair of beam members upon said vertically movable frame member such that said pair of beam members, and said pair of film clamping mechanisms mounted thereon, are movable toward and away from said pair of film roll mounting and dispensing assemblies.

19. The method as set forth in claim 18, further comprising the step of:

utilizing piston-cylinder assemblies, mounted upon said vertically movable frame member, for reciprocally moving said pair of beam members, and said pair of film clamping mechanisms mounted thereon, toward and away from said pair of film roll mounting and dispensing assemblies.

20. The method as set forth in claim 18, further comprising the step of:

respectively mounting a pair of auxiliary film clamping mechanisms upon said pair of beam members for removing film tail portions of the wrapping films from said pair of film roll mounting and dispensing assemblies in order to prepare for the commencement of film wrapping operations utilizing new rolls of wrapping film.