Adjustable mounting system for components of an article bagging and closing system and method
An adjustable mounting system is provided for a bag fastening system. The adjustable mounting system includes a conveyor table and a support assembly. The conveyor table has a frame. The support assembly is carried by the frame and is configured to support one or more components of a bag fastening system for adjustable positioning at selected elevational positions relative to the conveyor table. A method is also provided.
This application claims priority from U.S. Provisional Patent Application Ser. No. 60/685,263, which was filed May 26, 2005, and which is incorporated by reference herein.
TECHNICAL FIELDThis invention pertains to article bagging systems and methods. More particularly, the present invention relates to support frames and tables for machines that prepare a plastic bag to receive a closure device, or clip, about the neck of the bag after the bag has been filled with one or more items, such as a stack of thermoformed articles.
BACKGROUND OF THE INVENTIONPrevious machines are known for preparing and applying clips onto the neck of a plastic bag. For example, U.S. Pat. Nos. 3,163,969 and 3,163,972 disclose methods and apparatus for applying bag closures, or clips, onto the open neck portion of a plastic bag inside of which articles have previously been inserted. In the process of designing thermoforming lines and bagging machines for thermoformed articles, it has been realized that improvements are now needed in the design of support frames, or tables for supporting components of a bag fastening system in a product bagging operation in order to more accurately, quickly, and repeatedly align the components of the bag fastening system with packaged product during a bag closing operation so as to apply clips onto plastic bags that contain articles.
More particularly, present bag closing machines oftentimes do not properly or completely apply a clip onto an open neck portion of a plastic bag, such as a polyethylene bag. As the operating speeds of thermoforming machines and bagging machines have increased, this problem has been exacerbated as the increased speeds frequently lead to an increase in misapplied clips to bags. One aspect that contributes to this problem is generated when the number of articles in a stack that is being bagged is changed. This changes the optimally desired elevational position of a bag closing machine in relation to conveyed bags of articles that are being closed. By changing the number of articles in a stack (or even changing the type of articles), the optimal elevational position of the bagging machines also changes. However, this relative elevational position is built into existing machines and is not easily adjusted.
Accordingly, improvements are needed in the manner in which components of a bag fastening system are elevationally presented in relation to an open neck portion of a plastic bag that is being delivered, presented and prepared for delivery into the components, where a clip is applied onto the open neck portion of the bag to close the bag.
SUMMARY OF THE INVENTIONA support assembly is provided on a conveyor table for an article bagging system to support adjustable, elevational positioning of one or more components of a bag fastening system. For example, the support system can be provided on an article bagging and closing system used to package thermoformed articles into plastic bags and apply clips onto the open neck portion of each bag. The support assembly is provided on one side edge of a conveyor table and has a side mounting surface that is articulated between various raised and lowered positions by a kinematic linkage that is manipulated by an operator to place components of the article bagging and closing system into desired elevational positions. The components of an article bagging and closing system are positioned relative to a conveyor at desired elevational heights based upon the height of articles and the size of a bag. Accordingly, as the size of a stack of articles and/or the size of a bag is changed, the elevational positioning of the components for an article bagging and closing system can be adjusted relative to a top surface of a conveyor on the conveyor table.
According to one aspect, an adjustable mounting system is provided for a bag fastening system. The adjustable mounting system includes a conveyor table and a support assembly. The conveyor table has a frame. The support assembly is carried by the frame and is configured to support one or more components of a bag fastening system for adjustable positioning at selected elevational positions relative to the conveyor table.
According to another aspect, a bag fastening system table is provided with a table top, a frame, and a support plate. The table top is configured for supporting bags of articles during a bag closing operation. The frame is configured to support the table top. The support plate is carried by the frame and is configured to support a component of a bag fastening system for selective elevational positioning relative to the frame.
According to yet another aspect, a method is provided for positioning a bag processing machine relative to a conveyor on a bag conveyor table. The method includes: providing a bag conveyor table with a conveyor having a frame, a support member carried by the frame for mounting the bag processing machine and supported by the frame for selective elevational positioning of the bag processing machine relative to the conveyor; and adjusting positioning of the support member relative to the frame to realize a desired elevational position of the bag processing machine relative to the conveyor.
BRIEF DESCRIPTION OF THE DRAWINGSPreferred embodiments of the invention are described below with reference to the following accompanying drawings.
This disclosure of the invention is submitted in furtherance of the constitutional purposes of the U.S. Patent Laws “to promote the progress of science and useful arts” (Article 1, Section 8).
Reference will now be made to a preferred embodiment of Applicant's invention for a height adjustable mounting system for bag fastening devices on a conveyor table. While the invention is described by way of a preferred embodiment, it is understood that the description is not intended to limit the invention to such embodiment, but is intended to cover alternatives, equivalents, and modifications which may be broader than the embodiment, but which are included within the scope of the appended claims.
In an effort to prevent obscuring the invention at hand, only details germane to implementing the invention will be described in great detail, with presently understood peripheral details being incorporated by reference, as needed, as being presently understood in the art.
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More particularly, an alternating current (AC) motor 36 is configured to drive cylindrical brushes 32 and 33 in one direction, about a common axis, while driving brushes 34 and 35 in an opposite, counter-rotating direction along a second, common axis. Brushes 32, 34 and 33, 35 are driven so as to provide an entrance nip between the brushes on a side adjacent to guides 38 and 40. Accordingly, an open neck portion of a plastic bag is drawn in between brushes 32 and 34 until contents (such as articles) within the bag engage against guide bars 38 and 40, which forces the contents to the bottom of the bag and draws a resulting free portion of the open neck portion between the brushes where such open neck portion is flattened and generally smoothed out for presentment into bag accumulating device 16. According to one implementation, brushes 32, 34 and 33, 35 are rotated in opposite directions at 450 revolutions per minute (RPM). Other operating speeds are also possible.
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According to one construction, brushes 32 and 33 are driven by a common shaft having a chain sprocket that is driven by a drive chain. Likewise, brushes 34 and 35 are driven by a similar chain sprocket via the chain, which has a half-turn twist that drives brushes 34 and 35 in counter-rotation relative to brushes 32 and 33 with the help of an idler sprocket. Brushes 32-35 are each formed from groups of flexible synthetic plastic bristles.
According to one implementation, bag fastening system 10 is designed to be used downstream of a bagging machine that receives stacks of articles from a thermoforming line. For example, plates formed from thermoformable plastic foam sheet material are delivered from a thermoforming line in stacks of a pre-selected quantity. The stacks of plates are then conveyed onto a bagging machine where they are delivered into a folded film of material, after which bags are formed from the film about the stacks of plates. The bagged plates are then delivered into a bag fastening system 10 (see
Bag accumulating device 16 is provided downstream of bag arranging device with an upper drive assembly 42 and a lower drive assembly 44 that cooperate to bunch together the open neck-portion of bag 23 prior to applying a clip 26 via bag closing device 18. Upper drive assembly 42 and lower drive assembly 44 each have drive wheels and an o-ring drive band provided downstream of the drive wheel. Both pairs of wheels and bands co-act against an open neck-portion of a bag. The drive wheels move faster than the drive bands. Since the drive wheels have a faster surface speed than the bands, the open neck-portion of the bag is further bunched together as it progresses between the bands where it is then delivered to bag closing device 18.
Kinematic linkage 46 includes a pivot bracket assembly 47 that is pivotally carried between brackets 70 and 72. Pivot bracket assembly 47 includes a pair of pivot drive brackets 48 and 50 that are welded onto a medial portion of a central pivot tube 56, and a pair of pivot lifter brackets 52 and 54 (see
Kinematic linkage 46 also includes a pivoting, bronze nut 62 that is pivotally carried between brackets 48 and 50 and through which is provided a female threaded bore 63. Kinematic linkage 46 also includes a drive rod 60 having a threaded end portion that mates in complementary threaded engagement with the threaded inner bore of nut 62. Rod 60 is driven by a drive wheel 108 and a drive handle 110, extending from wheel 108, to rotate rod 60 within the complementary threaded bore of nut 62. Such rotation of rod 60 causes pivoting of pivot bracket assembly 47, so as to pivot lifter brackets 52 and 54, which correspondingly raises and lowers plate 58 and devices 14, 16 and 18. Hence, the elevational positioning of devices, 14, 16 and 18 can be adjusted relative to a top horizontal surface of conveyor belt 20 in order to optimize operation of devices 14, 16 and 18 based on the height of a stack of articles that are being closed within a bag during a bagging operation. Devices 14, 16 and 18 are removably mounted onto plate 58 using an array of threaded bores provided in plate 58.
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Each end of tube 56 is secured by a respective bracket 70 and 72, as shown in
More particularly, a pair of threaded fasteners 120 and 122 pivotally support assembly 112 to enable rotation of rod 60, as well as pivoting of the axis of rod 60, as seen between the views depicted in
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Similarly, mounting block 101 is bolted beneath mounting bracket 70. According to one construction, portions 154 and 156 of guide member 153 are made from common mild steel, such as 836 steel. Also according to one construction, mounting block 103 is made from aluminum. Optionally, mounting block 103 is made from bronze or mild steel. Additionally, narrowed core portion 156 has a pair of flat, parallel sides such that portion 156 conforms with the slot geometry in slot 106. Head portion 154 is enlarged and has a cylindrical configuration so as to entrap plate 58 between head 154 and frame member 83 for guided vertical positioning of plate 58 relative to slider plug assembly 102 and side frame member 83 of the conveyor table.
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In compliance with the statute, the invention has been described in language more or less specific as to structural and methodical features. It is to be understood, however, that the invention is not limited to the specific features shown and described, since the means herein disclosed comprise preferred forms of putting the invention into effect. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims appropriately interpreted in accordance with the doctrine of equivalents.
Claims
1. An adjustable mounting system for a bag fastening system, comprising:
- a conveyor table having a frame; and
- a support assembly carried by the frame and configured to support one or more components of a bag fastening system for adjustable positioning at selected elevational positions relative to the conveyor table.
2. The conveyor table of claim 1, wherein the support assembly comprises a kinematic linkage supported by the frame and a plate coupled to the kinematic linkage and supported by the frame for up and down positioning responsive to articulation of the kinematic linkage.
3. The conveyor table of claim 2, further comprising a plurality of bushings supported by the plate and at least one guide rod configured to guide the bushings and plate for vertical up and down positioning.
4. The conveyor table of claim 2, wherein the kinematic linkage comprises a pivot bracket with a threaded nut supported pivotally by the bracket and a drive rod supported for rotation and having a threaded portion configured to mate in threaded engagement with the threaded nut to pivot the pivot bracket, wherein a portion of the pivot bracket is pivotally affixed to the plate to raise and lower the plate relative to the table.
5. The conveyor table of claim 4, further comprising a wheel affixed to the drive rod to facilitate tactile rotation of the rod.
6. The conveyor table of claim 4, wherein the rod is supported at a position disposed from the threaded portion by the frame with a bushing that is pivotally supported by the frame to enable the rod to articulate in response to pivoting of the angle bracket.
7. The conveyor table of claim 4, wherein the pivot bracket is affixed to the side plate with a slotted connector assembly that enables vertical movement of the side plate in conjunction with pivoting of the pivot bracket.
8. The conveyor table of claim 1, wherein the support assembly is supported for vertical translation between selected positions.
9. The conveyor table of claim 1, wherein the conveyor table includes a conveyor belt.
10. A bag fastening system table, comprising:
- a table top for supporting bags of articles during a bag closing operation,
- a frame configured to support the table top; and
- a support plate carried by the frame for selective elevational positioning relative to the frame and configured to support a component of a bag fastening system.
11. The bag closing machine table of claim 10, further comprising a kinematic linkage configured to raise and lower the support plate relative to the frame.
12. The bag closing machine table of claim 10, further comprising at least one guide member configured to guide and retain the support plate for elevational positioning relative to the frame.
13. The bag closing machine table of claim 12, wherein the guide member comprises at least one vertical slot provided in the plate and at least one slider plug assembly provided on the frame and configured to slide along the slot to guide the plate in vertical up and down translation.
14. The bag closing machine table of claim 12, wherein the guide member comprises at least one vertical guide rod carried by the frame and at least one bushing carried by the support plate and configured to be slidably received along the guide rod to guide the support plate in vertical up and down translation.
15. The bag closing machine table of claim 11, wherein the kinematic linkage comprises a pivot bracket assembly communicating with the support plate and carrying a pivotal bushing nut, and further comprising a rotatable drive rod having a threaded end configured to mate with the nut so as to pivot the pivot bracket assembly responsive to rotation of the drive rod to raise and lower the support plate, respectively.
16. The bag closing machine table of claim 15, further comprising at least one of a drive wheel and a drive handle coupled with the drive rod to enable rotation of the drive rod by a user.
17. A method for positioning a bag processing machine relative to a conveyor on a bag conveyor table, comprising:
- providing a bag conveyor table with a conveyor having a frame, a support member carried by the frame for mounting the bag processing machine and supported by the frame for selective elevational positioning of the bag processing machine relative to the conveyor; and
- adjusting positioning of the support member relative to the frame to realize a desired elevational position of the bag processing machine relative to the conveyor.
18. The method of claim 17, wherein the bag conveyor table further comprises a kinematic linkage.
19. The method of claim 18, wherein adjusting comprises articulating the kinematic linkage to raise and lower the support member.
20. The method of claim 19, wherein the support member comprises a side support plate carried for vertical positioning along the conveyor table.
Type: Application
Filed: May 26, 2006
Publication Date: Dec 7, 2006
Inventor: Jere Irwin (Yakima, WA)
Application Number: 11/441,693
International Classification: B65B 51/04 (20060101);