Abstract: Apparatus for manufacturing an open-mouth bag of at least one layer of a flexible bag material, and method of manufacturing a bag by such apparatus. The apparatus includes a shaping device with a shaping box in the contour of the bag shape to be formed, with a top end and a bottom end, a conveying device for transporting the bag material along the shaping box, a closing device for joining the bag material along the shaping box to form a tube, and a closing station for generating a bag bottom, which is disposed beneath the bottom end of the shaping box. A partial vacuum device is configured to generate intermittently, a partial vacuum. When manufacturing a bag, the bag material is draped around the shaping box in the contour of the bag shape to be formed as continuous material and is joined to form a tube by the closing device.

Abstract: A forming apparatus for producing paperboard pressware includes servo-driven blanking and product forming subsystems, and a computerized control system to provide independent control of the servo-driven subsystems for improved timing and positional accuracy. Independent and individual electronic control of the various component subsystem enables remote control and monitoring of production and machine functions.

Abstract: A machine and a method for forming a two-compartment pouch having a lower compartment and an upper compartment The method includes the steps of drawing a film over a pair of fill tubes; sealing side edges of the film to form a sleeve; forming a bottom seal on the sleeve; pulling the sleeve downwardly; filling a bottom portion of the pouch using one of the fill tubes; forming a second seal over the filled bottom portion; filling an upper portion of the pouch using the other fill tube; and sealing the upper portion.

Abstract: Various device embodiments perform a sealing operation on a moving web, and comprise, among other things a plate assembly with an air cylinder assembly. The air cylinder assembly comprises a mount, a back plate, at least one air cylinder positioned between the mount and the back plate. The first plate assembly further includes a linear servo motor for linearly moving the air cylinder assembly with respect to the first base, and a first tooling plate with a sealing surface area. The first tooling plate coupled to the back plate.

Abstract: A bag machine, and method of making bags, has a sealing station a perforating station, and a downstream seal and perforation inspection station, or a perforation detection station and/or a seal inspection station is disclosed. Control of the perforating and sealing stations is preferably closed loop. The seal and perforation inspection station preferably includes a perforation detector that triggers a vision system and/or a camera, and the film is illuminated. Preferably, the inspection station is enclosed in an opaque housing, or the ambient light is otherwise blocked. The seal and perforation inspection station preferably provides an image output a display visible to a user. The vision system preferably includes a perforation location module and/or determines the distance between the seal and perforation. A downstream processing station can be provided, and can have a detected fault input, connected to a fault detect output from the seal and perforation inspection station.

Abstract: A sheet of side gusset material 3 is folded into halves, superposed into two layers and interposed between webs of panel material 1 and 2. One of the webs of panel material 1 is folded along a longitudinal folded line 8 to make the webs of panel material 1 and 2 open and make an open surface formed on the webs of panel material 1 and 2. One of the layers of side gusset material 3 is folded along the longitudinal folded line 8 to make the layers of side gusset material 3 open along with an auxiliary gusset portion 7 and make an open surface formed on the layers of auxiliary gusset portion 7. A web of bottom gusset material 4 is superposed on the open surfaces of panel material 1 and 2 and auxiliary gusset portion 7.

Abstract: A rotary bag machine and method for making bags from a film are disclosed. They include a rotary drum, an accumulation nip, a blanket that positions the film against the drum, and a blanket tensioner located away from the accumulation nip. The drum includes at least one seal bar mounted thereon, and the accumulation nip provides the film to the drum. Various aspects include the accumulation nip being in a fixed position independent of changes of the drum diameter, and/or the path from the accumulation nip to the drum being fixed in length, independent of changes of the drum diameter. An accumulation sensor and a controller that controls the accumulation nip speed and the drum speed in response to the sensor are provided in one embodiment. The speed control is in response to the speed of the film, the rate of change of a function of the input, response history, and/or a setpoint, in various alternatives.

Abstract: A plastic bag sealing device includes a work table, a sealing device having a silicon rubber roller, a material intake press roller and a material outlet press roller fixed beside the silicon rubber roller to press thereon, plural rotating shafts fixed outside around the silicon rubber roller and respectively mounted with a sealing blade, plural guide rollers employed to conduct plastic bags, a dot-cutting device, an opening-cutting device, and a press roller fixed beside the dot-cutting device and the opening-cutting device. With the sealing blades to carry out multiple sealing at the same location, a plastic bag can be quickly and firmly sealed, and with the dot-cutting device and the opening-cutting device installed on the work table to respectively execute dot-cutting and opening-cutting, the work table can be comparatively downsized, thus greatly elevating economic gain.

Abstract: A device for producing container blanks from a material web having a plurality of tools supported by a rotary tool holder. The tool holder is on rotation arranged to move each tool along a working path along which each tool is engageable with the material web for joining of opposite wall portions of the material web along connecting portions, and a return path along which each tool is disengageable from the material web. Each tool is arranged to be moved together with the material web when the tool is moved along the working path and the tool holder acts as a deflector for the material web when this moves together with the respective tools along the working path. The present invention also relates to a corresponding method for producing container blanks.

Abstract: An flexible pouch forming apparatus includes a transport means for transporting front and back panel films. A straw hole punch punches a straw hole with predetermined diameter in the front panel film. A seal material transport means unrolls a roll of seal material tape. A temporal hole punch punches a temporal hole in the seal material tape, and a guide means aligns the temporally punched section of seal material tape with the straw hole. A temporal heat sealing device temporally seals a periphery of the temporally punched section of seal tape material to the back side of the front panel film. An alignment station aligns the films to form the pouch body. A final heat seal means applies a final seal over the temporal heat seal at a lower temperature and pressure than the temporal heat seal. A seal means seals the edges, and a finishing station finishes the pouch.

Abstract: A machine and method for making bags is described and includes a web traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have, connected thereto, a source of power that is at an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire may be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.

Abstract: A method and apparatus for making and winding bags is disclosed. The bag machine includes an unwind section, a forming section, and a winder. The winder has an infeed nip and two spindles. Each spindle is located along a respective one of two alternative film paths. The spindles can be fixed position spindles and the alternative film paths can be predominantly downward. An over speed nip may be provided between the infeed nip and the alternative film paths to separate rolls or to separate all bags. An overlapper can be included. Rods that travel in an elliptical orbit, and/or air nozzles can be part of the overlapper. Air nozzles can also be used to direct the film to the appropriate alternative path. Conveyor belts along the alternative film paths can be used to guide the film. Static pinners can be used to help bold the bags to the conveyor, or the last bag to the roll. Pop-up fingers and air horns can help start the roll on a spindle. Paper banders can be use, as can pneumatic devices.

Abstract: Various device embodiments include first and second plate assemblies. Each plate assembly includes a base, a seal plate, one or more air bladders and a servo motor to provide a linear motion of the seal plate with respect to the base. The device further includes at least one plate assembly motor operably linked to the bases of the plate assemblies to provide a linear motion of the first and second plate assemblies toward each other to perform a sealing operation and away from each other. The device further includes a controller connected to the at least one plate assembly motor and to the first and second servo motors to coordinate the motion of the first and second seal plates to perform a seal operation on a web while traveling with the web.

Abstract: A machine and method for making bags is described and includes a web , traveling from an input section to a rotary drum, to an output section. The rotary drum includes at least one seal bar, having a first sealing zone, and an adjacent weakening zone. The weakening zone may be a heated perforator, includes a heating wire, or be disposed to create an auxiliary sealed area. The heating wire can have, connected thereto, a source of power that is at an adjustable voltage or magnitude, and/or pulsed, and/or a feedback loop. The heating wire may be an NiCr wire and make intermittent contact with the web and be disposed in an insert. The weakening zone may create a line of weakness that is uniform or varies in intensity, is a separating zone, or includes a heat film, a toothed blade, a row of pins, a source of air, or a source of vacuum. The sealing zones may include temperature zones, cartridge heaters, cooling air, or heated air, or a source of ultrasonic, microwave or radiative energy.

Abstract: A method of manufacturing a pouch with a straw hole is provided that includes the steps of feeding a front-side film forming one panel of the pouch and a back-side film forming an other panel, from a roll of material, and punching a straw hole in one panel of the pouch. The method also includes the steps of feeding a seal material tape with a plurality of temporally punched portions, and each temporal punched portion has a size slightly larger than that of the straw hole, to a rear side of the panel with the straw hole. The method further includes the steps of temporally sealing the temporally punched portion of the seal material tape over the straw hole by aligning one temporally punched portion of the seal material tape with the straw hole, separating the temporally punched portion from the seal material tape and temporally sealing the temporally punched portion to the one panel.

Abstract: A plastic bag making machine is disclosed, and includes a dancer assembly that receives film from which the bags are to be made. The film travels from the dancer assembly to a drum-in nip and then to a sealing drum. After the sealing drum, the film travels to a drum-out nip. Then the film travels to a device-in nip, vertically through a processing device, and then to a device-out nip. A controller is connected to and controls the drum-in nip, the drum-out nip, the device-in nip, the device out nip, the dancer assembly and the sealing drum (including the seal bars and/or the sealing blanket drives). The controller includes a memory in which at least one set of operating parameters used to control the machine is stored.

Abstract: A process for manufacturing a tetrahedral-shaped pouch (100 from a flexible strip of film material is such that a tube (13) is formed from a strip (32) in a continuous manner involving the creation of a longitudinal sealing seam (12), and a tetrahedral shaped pouch (10) is formed from the tube (13) by means of alternating forming a first transverse sealing seam (14) running transverse to the longitudinal seam (12) and second transverse sealing seam (16) running essentially perpendicular to and a distance from the first transverse seam (14), whereby the second transverse seams (16) are situated in the region of a tetrahedral corner (18) of the pouch (10), such that an essentially tube outlet part (20) for pouring that is closed as its free end (22) is formed projecting out from the pouch (10).

Abstract: A process for manufacturing a, tetrahedral-shaped pouch (100 from a flexible strip of film material is such that a tube (13) is formed from a strip (32) in a continuous manner involving the creation of a longitudinal sealing seam (12), and the tetrahedral shaped pouch (10) is formed from the tube (13) by means of alternatingly forming a first transverse sealing seam (14) running transverse to the longitudinal seam (12) and second transverse sealing seam (16) running essentially perpendicular to and a distance from the first transverse seam (14), whereby the second transverse seams (16) are situated in the region of a tetrahedral corner (18) of the pouch (10), such that an essentially tube outlet part (20) for pouring that is closed at its free end (22) is formed projecting out from the pouch (10).

Abstract: A method of making a multicompartment reclosable thermoplastic bag having at least two compartments is disclosed. Each compartment has a top, a bottom, two side edges, and two opposing sidewalls joined at the side edges and the bottom. Each compartment has a closure across the top thereof, which are arranged back-to-back and aligned. The compartments are attached together proximate the tops of the compartments, and the bottoms of the compartments are free from being attached to each other. Processes for making such bags from one or more webs are also disclosed.

Abstract: Devices for cross-welding or cross-separating welding plastic films (2) are used in a manner known per se in machines for producing bags, said devices comprising a welding roller (3) and a heated welder terminal (4) which can be moved reciprocally and between which the plastic films (2) are guided for welding. According to the invention, the welding roller (3) is covered by a continuous belt (5).

Abstract: A method and apparatus for making pouches is disclosed. It includes continuously moving the film through an intake section and then through a shuttle section. The film passes a plurality of successive sealing stations in the shuttle section, and while the film moves continuously, the film is at times generally stationary with respect to the sealing stations and at times moving with respect to the sealing stations. A plurality of successive seals is applied with the plurality of sealing stations, while the film is generally stationary with respect to the sealing stations. The film is then moved through an output section.

Abstract: A bag-making apparatus of a bag-making and packaging machine, the bag-making apparatus being changeable in its bag-making speed and including a sealing device that performs sealing on a film that is to be formed into bags. The sealing device is made of a pair of hot plates and a driving mechanism that causes the hot plates to contact and separate from each other at an operating speed that is linked to the bag-making speed via a transmission mechanism, and the hot plates are caused to contact with and separate from each other with a stroke that is adjusted by the transmission mechanism, and a contact time of the hot plates is maintained at a constant value by way of adjusting the stroke when the operating speed of the driving mechanism is changed.

Abstract: A hinge is disclosed for a plastic film. This film has a predetermined thickness sufficient for the plastic film to remain planar in an absence of a first bending moment applied across the plastic film. The hinge includes at least one linear groove configured in the plastic film to reduce the predetermined thickness of the plastic film at the linear groove. The hinge permits preferential hinging of the plastic film at the linear groove responsive to a bending moment at the linear groove across the plastic film less than the first bending moment. The linear groove has insufficient depth to sever the plastic film and enables the hinge film to retain sufficient remaining thickness at the linear groove to permit hinging and not tearing of the plastic film at the linear groove. When the hinge is placed across a plastic film, and the film bent at the hinge, the film defines a first panel and a second panel with each panel disposed at an angle to one another at the hinge.

Abstract: A seal cutter for a plastic bag includes a folding device, a conveyor device, a point cut-off device, a tension control device, and a coreless winding device. The folding device includes a rectangular guide plate, a triangular guide plate rested on the rectangular guide plate, and an oblique drive rod located above the triangular guide plate. The tension control device includes a fixed roller set, a movable roller set, and a chain set for moving the movable roller set to engage the fixed roller set. The coreless winding device includes a piston rod structure, and a clamping structure.

Abstract: A cross sealer for a plastic bag making machine includes a frame with an upper moveable seal bar unit and an opposed lower stationary seal bar unit. The movable unit is a lightweight construction seal beam. A rotating shaft spans the cross sealer and is connected by a plurality of eccentric linkages to the seal beam. The linkages moves a seal bar into sealing engagement across the width of the web to the seal bar unit constructed with a support beam and a seal bar connected to the beam. The seal bar unit is mounted as a substantially stationary unit during sealing and is supported by a plurality of air cylinder units for positioning from standby to an operating position. Each air cylinder unit includes an adjustable stop unit secured to the back of the cylinder unit and connected to the cylinder piston for adjusting the movement of the piston and thereby the operative sealing position of the stationary seal bar unit.

Abstract: The line plastic bag machine comprises: first and second side walls; a plurality of rollers mounted between the side walls for receiving a web of plastic film that is trained through the machine over and around the rollers; a main drive motor; a main drive shaft driven by the main drive motor; the rollers including a main drive or chrome roller and a pair of spaced apart shuttle rollers mounted in a shuttle assembly; a drive train for driving from main chrome roller from the main drive shaft; the shuttle assembly being mounted for back and forth movement thereby to position an incremental width of the web of film traveling over the shuttle rollers in a momentary stationary position as the web of film is moving through the machine so that the incremental width of the film is momentarily stationery relative to the side walls; drive apparatus for moving the shuttle assembly; a perforating and sealing head which is movably mounted relative to the side walls for moving upwardly and downwardly over and relative to

Abstract: The method entails unwinding portion of film stored in roll form. The film is made of a heat-sealable single- or multilayer flexible material. The flaps for the unwound portion are folded until they are side by side or overlapped along a narrow band. The resulting new lateral edges are folded further so as to form longitudinal accordion-like portions and the bottom is then formed with a transverse heat-sealed portion which is produced simultaneously with a median cut relative to the heat-sealed portion, successively separating two pairs of adjacent containers. The heat-sealed bottom is inserted into the container by an extent which is equal to half the width of the lateral accordion-like portion and a longitudinal heat-sealed portion is then produced in the region where the flaps lie side by side and/or overlap, blocking the bottom and the accordion-like portion, simultaneously with a complete or partial cutting of the longitudinal heat-sealed portion.

Abstract: In the case of a method for producing a packing material from plastic film or a similar weldable material in the form of a bag or sack with side folds, the front and rear walls, as well as the side walls are formed from separate sections of material, which are connected with one another by welded seams. The material sections of the front wall and the rear wall are formed from a first and a second flat main sheet of material which, after a mutual overlapping is brought about, are conveyed in a first, common conveying direction. A third flat sheet of material is folded into a web with side folds, severed from the sections with side folds at a specified length and conveyed in a second direction transversely to the first conveying direction and placed upon one of the two main sheets of material.

Abstract: A cross sealer for a bag making machine includes a frame with an upper seal bar unit and a lower seal bar unit in aligned opposed relation. One is movable seal bar unit which includes a rigid support beam of a lightweight construction and a light weight seal bar connected to the beam by a plurality of adjustable stud units for adjusting the position of the seal bar. A rotating shaft spans the cross sealer and is connected by a plurality of eccentric linkages to the beam between side plates of the frame. The linkages support the beam and seal bar and transfers the sealing force onto the beam and bar for moving the bar into sealing engagement across the width of the web. The opposed seal bar unit is similarly constructed with a beam and a seal bar with the units interconnected by adjustable stud connectors.

Abstract: The present invention relates to a sealing apparatus for sealing foil material, the apparatus comprising a foil conveying means and a sealing means including a sealing head which has at least one sealing position for performing the foil sealing operation, an intermediate position in which the sealing head has a predetermined distance from the sealing position, and an inoperative position in which the sealing head has a second predetermined distance from the sealing position that is greater than the first distance. Furthermore, the invention relates to a corresponding sealing method which can be carried out with the sealing apparatus, wherein the sealing head is removed from the foil material to a first distance during the further transporation of the foil material and is removed from the foil material to a second greater distance when the foil sealing operation is interrupted.

Abstract: An apparatus for manufacturing containers or bags includes a sealer that produces seals on a moving film. These seals are spaced at intervals that determine the length of the containers. An operator can change the desired container length while the film is moving. In response to such changes, a control arrangement adjusts the speed at which the sealer rotates and, in turn, the spacing of the seals and the length of the containers.

Abstract: A plastic bag making machine is disclosed, and includes a dancer assembly that receives film from which the bags are to be made. The film travels from the dancer assembly to a drum-in nip and then to a sealing drum. After the sealing drum, the film travels to a drum-out nip. Then the film travels to a device-in nip, vertically through a processing device, and then to a device-out nip. A controller is connected to and controls the drum-in nip, the drum-out nip, the device-in nip, the device out nip, the dancer assembly and the sealing drum (including the seal bars and/or the sealing blanket drives). The controller includes a memory in which at least one set of operating parameters used to control the machine is stored.

Abstract: A bag making and packaging machine has a pair of transverse sealing members on opposite sides of a film path for transversely sealing a bag-making film moving longitudinally along this path. A pair of support members supports these transverse sealing members and is driven so as to bring the transverse sealing members towards each other to contact with the film and away to separate them from each other. At least one elastic member is interposed between at least one of the support members and the corresponding one of the transverse sealing members. This elastic member is in a contracted condition when the transverse sealing members are in contact with the film on the film path and thereby applying on the film a sealing pressure corresponding to the distance by which the elastic member is contracted.

Abstract: A cross-laminated synthetic resin fabric mesh material is formed into wicket-top produce bags for use with automatic bag filling equipment. A longitudinally moving sheet of the mesh is folded and formed into a folded, gusseted tubular web. Laterally spaced holes for wicket pin attachment and slots are formed at selected positions along the length of the moving web according to the desired bag height. A wicket-top attachment is then formed on the web near the wicket pin holes. The web is then cut into bag length sleeves, which are thereafter closed at an opposite end to form the bag.

Abstract: A method and apparatus for forming flat-bottomed plastic bags uses a flattened plastic tubing as a raw material. The tubing is unwound from a roll, and is passed around a gusset plate assembly, where guide members on opposite sides of the gusset plate assembly guide outside edges of the tubing inwardly between a pair of gusset plates to form gussets in the tubing. In a preferred embodiment, microperforations are formed in the bag material to provide ventilation to the finished bags.

Abstract: An automated machine for making standardized disk jackets of consistent quality from non-woven cloth and polypropylene materials includes a machine table, and a raw material mount, a feed roller unit, a first cutter unit, an ultrasonic closure unit, a second cutter unit, a scrap drawing unit, and a conveyor unit disposed in sequence on the machine table. Non-woven cloth and polypropylene material rolls are mounted on the raw material mount. They are drawn, overlapped, cut, sealed using ultrasonic waves, cut into shape, and output as disk jackets for receiving compact disks.

Abstract: An apparatus for manufacturing gusseted bulk bag liners having a continuous web of gusseted bulk bag liner material, wherein the continuous web is advanced along a predetermined path, includes four simultaneous cutting and resealing apparatus that engage longitudinally extending fold lines of the continuous web during the movement of the web. The simultaneous cutting and sealing apparatuses are moved transversely to the direction of movement of the web of gusseted bulk bag liner material in accordance with a predetermined program, thereby forming a gusseted bulk bag liner comprising a sidewall, a top wall, a bottom, an inlet chute and discharge chute.

Abstract: A method for making a non-peelable, sterilizable receptacle having a low particulate count for receiving articles for storage in pharmaceutical intermediate processing. This method involves providing a continuous first web of polyolefin film, providing a continuous second porous web of spun-bonded polyolefin film. The webs are advanced through cleaning processes that include an anti-static device, an ultrasonic vibrating device and a vacuum device. The two clean webs are then brought together and passed into the heat sealing section. The webs are heated welded together by forming continuous seams on the webs to form an open pouch. The seams are made by applying opposing platens at a pressure between about 30 to about 40 psi to both the webs and a heat welding element at a temperature of about 330.degree. to about 380.degree. F. against only the first web. This causes the first web to melt into the pores of the second web.

Abstract: This invention pertains to draw tape equipment, and methods for incorporating draw tapes into plastic and like bags. In general, a continuous plastic web is slit at a slitting station to form layers, and respective free edges. The web then passes to a hole forming station where holes are punched in the top and bottom layers adjacent the free edges. After the holes are punched, edge regions of the top and bottom layers are separated from each other, followed by forming of hems in the separated layers at hem forming stations arranged in parallel with each other. Concurrent with forming of the hems, continuous draw tapes are fed to the hem forming stations and the hems are formed about the draw tapes. The formed hems, with the draw tapes incorporated therein, optionally pass through first temperature control stations where the temperature of the plastic web is controlled to a desired temperature before hem sealing. The formed hems are then sealed to the main bodies of the respective top and bottom layers.

Abstract: There is provided a torque control assembly for use on a continuous motion bag machine comprising torque driven means and a drive for driving a motor wherein the torque driven means is operatively connected to the motor for lowering a tension in a web prior to the web entering a sealing assembly on the bag machine. There is also provided a continuous motion bag machine comprising the torque control assembly.

Abstract: An apparatus for manufacturing gusseted bulk bag liners having a continuous web of gusseted bulk bag liner material, wherein the continuous web is advanced along a predetermined path, includes four simultaneous cutting and resealing apparatus that engage longitudinally extending fold lines of the continuous web during the movement of the web. The simultaneous cutting and sealing apparatuses are moved transversely to the direction of movement of the web of gusseted bulk bag liner material in accordance with a predetermined program, thereby forming a gusseted bulk bag liner comprising a sidewall, a top wall, a bottom, an inlet chute and discharge chute.

Abstract: A tube of polyethylene or similar polymeric material having a continuous sidewall is extruded using conventional technology. Two horizontal gussets are formed from the sidewall of the tube, one on each side. The tube is flattened into a substantially flat workpiece. The workpiece is heat sealed at locations predetermined by the configuration of the container in which it is to be inserted. Concurrently with the heat sealing pass, or shortly thereafter, cuts are made to separate manufacturing waste material from the tube. The waste material is recycled into the feedstock of the extruder. The sealed workpiece is split axially into two substantially equal portions, each containing a complete gusset, thereby forming two completed liners.Alternatively, one horizontal gusset is formed in the sidewall of the tube. As in the first embodiment, the workpiece is heat sealed at locations predetermined by the configuration of the container in which it is to be inserted.

Abstract: An apparatus and method for maintaining the confidentiality of information contained in a printed document is accomplished by enclosing the document in an envelope, or similar enclosure, before the document is discharged from the apparatus. The apparatus generally includes: a printer, which may be a facsimile machine, photocopier, or computer printer; a document positioner for positioning the document, so that the document may be enclosed in an envelope; and a document encloser, which encloses the document in the envelope so that the document may later be removed from the envelope for viewing only by the intended recipient. The functions and sequencing of the apparatus are controlled by a suitable control system. A label printer, for printing the name of the intended recipient on the envelope, or the other desired information, may also be included.

Abstract: A method for continuously forming bags comprising continuous steps of heat-sealing a continuous tubular plastic film, such as a continuously formed inflation tube or the like, widthwise at given positions thereof while the tubular film is being conveyed, cutting sequentially the tubular film along the heat-seals into bag-shaped containers, and conveying the tubular film over a set distance to a following step while the heat-seals of the heat-sealed tubular film being press-held and cooled. Also the present invention relates to an apparatus for continuously forming bags for heat-sealing a continuous tubular plastic film, such as a continuously formed inflation tube or the like, widthwise at given positions thereof while the tubular film is being conveyed, and then cutting the tubular film along the heat-seals into bag-shaped containers.

Abstract: In a method of manufacturing gusseted bulk bag liners, a continuous web of gusseted bulk bag liner material having longitudinally extending fold line is advanced along a predetermined path. Simultaneous cutting and resealing apparatus are engaged with the longitudinally extending fold lines of the length of gusseted bulk bag liner material during the movement thereof. The simultaneous cutting and resealing apparatus are positioned transversely to the direction of movement of the continuous web of gusseted bulk bag liner material in accordance with a predetermined program, thereby forming a gusseted bulk bag liner having a predetermined comprising a sidewall, a top wall, a bottom, an inlet chute and discharge chute.

Abstract: An automated continuous heat sealing apparatus and method are disclosed having dedicated operating stations for fabricating continuous hermetically sealed tubular structures and individual bags from rolls of continuous webs of polymer material, the first web including TYVEK.RTM., as breather bags adapted for gas and steam sterilization. The breather bags are customized to any length depending on the settings of the apparatus. A feeding station holding the rolls of continuous webs longitudinally feeds the continuous webs to a first operating station having a slitter for providing a continuous longitudinal strip of apertures in the second continuous web for cutting material from the slitted second continuous web, and for continuously heat sealing a first set of seams to join the first and second webs. A second operating station continuously heat seals a second set of seams to join the second and third continuous webs for forming a continuous tubular structure.

Abstract: An automated continuous heat sealing apparatus and method are disclosed having dedicated operating stations for fabricating continuous hermetically sealed tubular structures and individual bags from rolls of continuous webs of polymer material, the first web including TYVEK.RTM., as breather bags adapted for gas and steam sterilization. The breather bags are customized to any length depending on the settings of the apparatus. A feeding station holding the rolls of continuous webs longitudinally feeds the continuous webs to a first operating station having a slitter for providing a continuous longitudinal strip of apertures in the second continuous web for cutting material from the slitted second continuous web, and for continuously heat sealing a first set of seams to join the first and second webs. A second operating station continuously heat seals a second set of seams to join the second and third continuous webs for forming a continuous tubular structure.

Abstract: An apparatus and method for producing zipper closure bags from a continuous tube which includes advancing the tube along a continuous path for travel with a rotating metering roll, the metering roll having circumferentially spaced apart ports corresponding to a bag width, and a receiving conveyor having vacuum port-equipped sealing bars for receipt of the tube from the metering roll and for providing across seals defining adjacent paths.

Abstract: Methods of converting pitch on a pouch machine include using a standard drive table with above table change parts including sealer wheel, filler wheel and knife. The sealer wheels and filler wheels are retained at respectively the same diameters to facilitate use of the common drive and to facilitate maintenance of the pouch web path through the machine for all pouch pitch ranges. Pouch stations on the sealer and filler wheels are not limited to whole degree movements and pouch web speeds are preferably maintained constantly for all pouch pitch ranges.

Abstract: In an apparatus for making plastic bags or the like from a continuous film of material comprising a sealing drum having at least one seal bar for imparting transverse seals to the film at regularly spaced intervals and a perforator having a rotatable perforator blade for imparting transverse perforations to the film at regularly spaced intervals, the film comprising print marks appearing thereon at regularly spaced intervals, an apparatus and method are disclosed for tracking the positions of each print mark and each perforation and comparing the difference between these positions to a desired difference and thereafter adjusting the angular position of the perforator blade until the difference between the positions of each print mark and each perforation is equal to the desired difference to thereby maintain a desired spacing between each print mark and each perforation.