At Separate Station From Heat Sealing Patents (Class 493/195)
  • Patent number: 10011410
    Abstract: The invention discloses a flexible container sleeve structure, which includes an elongated sleeve defining in series containers and having front and back panels joined to each other along their elongated sides; a first gusset formation provided between the front and back panels forming a base; a second gusset formation provided between the front and back panels forming a top; and a curvature provided in the sides of the front and back panels. The containers being defined by the front and back panels and the gusset formations. The front panel may be imprinted with a graphic of a wine barrel or beer keg. The curvature is convexly curved from the top to the base, thereby adapted to assist in creating the impression of a barrel or keg.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: July 3, 2018
    Assignee: MAVERICK INTERNATIONAL (PTY) LTD
    Inventor: Derek Martin Fay
  • Patent number: 9884465
    Abstract: A dunnage conversion machine provides an improved electronic monitoring and control system for detecting and resolving many jamming conditions before they require significant operator intervention. The machine includes a conversion assembly with a feeding device that feeds the sheet stock material through the machine, and a sensing device downstream of the feeding device to monitor movement of the stock material downstream of the feeding device and to output a corresponding signal. A controller controls operation of the feeding device in response to the signal from the sensing device. The controller uses the signal to detect a potential jam condition and controls the feeding device to prevent or minimize the occurrence or severity of the jam condition, thereby minimizing the amount and degree of required operator intervention.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: February 6, 2018
    Assignee: RANPAK CORP.
    Inventor: Jiri G. Sip
  • Patent number: 9322703
    Abstract: A spectroscopic instrument comprising a compartment (2) for housing instrument components (3) and desiccant (4) to protect the instrument components, and a deformable container (5) having at least one wall portion which is movable within the compartment (2) so as to vary the volume of the compartment (2) that is occupied by the deformable container as the container is deformed. The interior of the deformable container (5) is in fluid communication with the surroundings of the instrument, such that a difference in pressure between the compartment and the surroundings tends to cause the deformable container to deform, moving the wall portion.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: April 26, 2016
    Assignee: PerkinElmer Singapore PTE Ltd.
    Inventors: Robert Alan Hoult, Ralph Lance Carter
  • Patent number: 9039591
    Abstract: A bag manufacturing system has at least one tube forming device which forms a tube and separates the tube into tube pieces, and at least one bottom forming device which provides the tube pieces with a bottom and thus forms the bags. The system has a storage device for storing the tube pieces on at least two levels. At least two charging and removing devices are provided with which the tube pieces can be supplied to and/or removed from at least two different points of the levels of the storage device.
    Type: Grant
    Filed: May 4, 2005
    Date of Patent: May 26, 2015
    Assignee: WINDMOELLER & HOELSCHER KG
    Inventor: Hans-Dieter Welp
  • Publication number: 20150072849
    Abstract: An apparatus for making a self-opening bag pack includes a supply of film material. An extruder forms a continuous tube of film. A flattener flattens the tube. A corona treater treats at least one surface of the flattened tube. A first sealer forms a bottom seam across a width of the flattened tube. A cutter cuts the flattened tube into bag blanks at a predetermined distance from the bottom seam. A stacker forms the bag blanks into a bag pack. An adhesion knife penetrates the bag pack and adheres adjacent bag blanks together in the bag pack. An aperture maker forms means for suspending the bag pack from a dispensing rack. The pack is attached to the dispensing rack and the front wall of the subsequent bag will be adhered to the rear wall of a first bag, thereby causing the first bag to open when pulled from the rack.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventor: Gregorio Lim Tan
  • Publication number: 20140128235
    Abstract: A system and method of manufacturing reinforced bags having reinforcing elements applied about the bags to support the bags in an opened and/or upstanding configuration. A web of bag material can be fed from a supply and can be folded and secured to form the bags. A series of reinforcing strips can be fed through an adhesive application station for application of an adhesive material thereto in a desired pattern. The reinforcing strips and bags are brought into registration and are adhesively attached to form the reinforced bags.
    Type: Application
    Filed: March 14, 2013
    Publication date: May 8, 2014
    Applicant: Graphic Packaging International, Inc,
    Inventors: Joseph C. Walsh, JR., Jeffrey T. Sloat
  • Publication number: 20110019942
    Abstract: A flat bottom, stand-up bag and a method of manufacturing the bag is provided. The bag includes a bottom wall, opposing front and rear walls and two side walls. The side walls connect the front and rear walls and the bottom wall is connected to the other walls at their lower edge. The bag preferably incorporates a continuous polymer web material forming the front wall and rear wall of the bag, as well as the bottom wall. The side walls include gussets and a triangular base portion formed at the intersection between the bottom wall and the side walls.
    Type: Application
    Filed: July 22, 2009
    Publication date: January 27, 2011
    Inventor: Carmelo Piraneo
  • Patent number: 7722517
    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.
    Type: Grant
    Filed: February 25, 2008
    Date of Patent: May 25, 2010
    Inventor: Chun-Shan Chen
  • Patent number: 7465265
    Abstract: A method for installing a closure in the mouth of a pre-made flexible bag. The closure may, for example, be a shrouded plastic zipper with or without a slider. The bag may, for example, have side gussets. In the disclosed embodiment, the bag is made using a laminated material comprising an interior layer of thermoplastic material and a non-interior layer of non-thermoplastic material, such as paper. The package is made by a method comprising the following steps: method for providing a bag with a closure, comprising the following steps: (a) slitting the bag along first and second lines so that a top marginal portion of one wall of the bag disposed between the first and second lines forms a flap; (b) folding back the flap to uncover a topmost portion of the other wall; (c) joining one side of a closure to at least a portion of the topmost portion of the other wall uncovered by step (b); and (d) joining a portion of the flap to the other side of the closure after steps (a)-(c) have been performed.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: December 16, 2008
    Assignee: Illinois Tool Works Inc.
    Inventor: Steven Edwin Hinesley
  • Publication number: 20040092375
    Abstract: The present invention relates to a method and apparatus for folding and sealing a web of material to form an item with a contoured seal such as a valve bag. Folding apparatus form the web of film into a continuous tubular web having upper and lower sections, a closed side and an open side. The open side has two folded flaps that extend into an inside area of the tubular web. A longitudinal sealer includes a floating sealer located inside the tubular web. The floating sealer and its contoured heating element are selectively and intermittently pressed against the overlapping flaps to form a contoured seal that bonds the flaps together. The contoured seal defines a self-sealing valve port through which product is poured to fill the bag. Pairs of repelling magnets biasingly elevate the floating sealer above the overlapping flaps when the longitudinal sealer is in its release position.
    Type: Application
    Filed: October 31, 2003
    Publication date: May 13, 2004
    Inventors: Donald J. Pansier, Kurt R. Holtz, John M. Hathaway, Greg S. Winicki
  • Patent number: 6635002
    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.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: October 21, 2003
    Inventor: Yong-Tsang Yeh
  • Patent number: 6471818
    Abstract: A process for applying a portion of a closed zipper inside a container of flexible material, in which a segment or portion of a closed zipper-strip is first applied by a fixing device upon the inner sides of a film of flexible material, prior to cutting of the zipper strip portion from the remainder of the zipper strip. The zipper portion is applied in such a position that it will not interfere with the subsequent sealing along transverse seal lines defining the opposite sides of the container.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: October 29, 2002
    Assignee: ICA S.p.A.
    Inventor: Gino Rapparini
  • Patent number: 6139479
    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.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: October 31, 2000
    Assignee: Reynolds Consumer Products, Inc.
    Inventor: Richard Heiliger
  • Patent number: 6059707
    Abstract: A method of forming a plurality of easy to open handle bags including the steps of providing a flattened tube of thermoplastic material oriented in a generally longitudinal direction. The flattened tube has a first longitudinal side edge and a second longitudinal side edge, a transverse lower heat seal, and a transverse upper heat seal. The tube also has first, second, and third sections. The second section being disposed between the first and third sections. The first section is joined to the second section along a generally longitudinal first fold line. The second section is joined to the third section along a generally longitudinal second fold line. The second section is cut along a generally transverse first cut line extending between the first and second fold lines. The first section is folded over the second section along the first fold line.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: May 9, 2000
    Assignee: Tenneco Packaging Inc.
    Inventors: William P. Belias, Robert T. Maddock
  • Patent number: 5860905
    Abstract: A system for receiving tubular formed film comprising two facing walls and forming plastic bags having headers, open mouths and sealed bottoms into a block or stack of bags. The system includes an opener means for severing a spaced perforation on only one wall of the film to make a bag with an open mouth.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: January 19, 1999
    Inventor: Edward C. Bruno
  • Patent number: 5810706
    Abstract: A bag includes a first panel with at least one access hole in it, and a second panel without a hole corresponding to the at least one hole of the first panel. Preferably, two holes are present, preferably near the bag mouth. The panels are substantially equal in length. The bag can be easily opened by described bag opening means, without the need for vacuum or air to open the bag. The bag can be used in conjunction with otherwise conventional taped bag systems. A method of making the bag, a bag opening system, a method of opening the bag, and a packaging system are also disclosed.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: September 22, 1998
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Gregory E. McDonald, Andrew W. Moehlenbrock, John Carson
  • Patent number: 5759333
    Abstract: An apparatus for use in removing hazardous material I from an elongated pipe P comprises an elongated upper work section 41 from which a plurality of in-line lower debris collection and disposal bags 47 depend. The upper work section and the bags are made of flexible sheet material. The upper work section has a bottom formed with a plurality of in-line chutes 52 that extend between adjacent bags. A plurality of gloves 48 are mounted to the upper work section. Upon wrapping and securing the upper work section about a pipe with the chutes inclined therefrom, insulation may be manually worked from the pipe and channeled by the chutes into the bags for collection and storage. A method of manufacturing the apparatus from two continuous webs of flexible material is also disclosed.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: June 2, 1998
    Assignee: Grayling Industries, Inc.
    Inventor: Kurt D. Ross
  • Patent number: 5741208
    Abstract: A waste container liner and method of manufacture thereof are provided. The method involves the steps of flattening a continuous tubular web of pliable material to form two adjoining layers of material and then slitting one of the longitudinal edges of the flattened web. The adjoining layers are then sealed at regular intervals across their width and perforations are formed across the seals. The web is twice folded longitudinally prior to rolling and detachment of individual liners along the perforations. The waste container liner is made of a unitary piece of pliable material and includes two adjoining layers joined at a longitudinal edge. Each of the adjoining layers has a free longitudinal edge and is sealed at its lateral edge with the other adjoining layer.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: April 21, 1998
    Assignee: Industrial Transportation, Inc.
    Inventor: Landal B. Moak
  • Patent number: 5709641
    Abstract: A thermoplastic bag structure and method for making and packaging thermoplastic bags such that their tops are easily identified and the bags are easily opened. The method for producing these bags begins with cutting a flattened thermoplastic tube into two portions. At least one of the two portions is then collapsed to form a sheet of material having a pair of thermoplastic layers, a straight folded bottom edge and a pair of top edges, at least one of which has a skewed-cut. Bag side structures are formed in the sheet of material at about bag-width distances apart. The bags are then folded a predetermined number of times, in a direction transverse to the bag side structures, so that the skewed-cut top edge(s) of each of the bags remains exposed.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: January 20, 1998
    Assignee: Tenneco Packaging Inc.
    Inventor: Edward A. Vaquero
  • Patent number: 5690600
    Abstract: An apparatus (31) and a method are disclosed for temporarily separating multiple webs (51,53) while performing an operation (123,125,133) thereon, including the feeding of multiple webs (51,53), the provision of a retractable web separator (68) for temporarily separating the webs, the performance of an operation (123,125,133)) upon the webs, the provision of a gripping device (65) for gripping the webs and assisting in moving the webs (51,53) along a predetermined path (83), and the provision of a sealing device (71) for sealing the webs together to form a package seal (73). The retractable separators (68) are mounted on a conveyor (83) and each separator (68) in turn temporarily separates the webs (51,53), for insertion of a port (45), fitting or the like, whereupon the separator (68) may be retracted and the port (45) may be sealed into the packages (41) being manufactured. The preferred separator (68) has a shaped head (170) on the end of a reciprocating shaft (158).
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: November 25, 1997
    Assignee: Baxter International Inc.
    Inventors: Sungwook Yang, Dale R. Severs, David Frankenberger, Michael Kemp
  • Patent number: 5683340
    Abstract: There is provided a thermoplastic film bag having at least two integral members that facilitate opening the bag. The bag is manufactured from a flattened tube of thermoplastic material which may be distinctively severed along independent phase shifted sinusoidal oscillating paths down the center of the collapsed tube. The bag may have two opposed tie members which are offset from the vertical center axis of the bag and from each other. The tie members may be grasped and pulled apart to facilitate the easy opening of the bag. The tie members may then be tied together to form a strong member by which the bag may be picked up and carried. In alternate embodiments the shape of the integral tie members can be modified to create a bag having only the easy open feature with no tie members. A method for making the bag is also described.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: November 4, 1997
    Assignee: Tenneco Plastics Company
    Inventors: William P. Belias, Edward M. Bullard, Carl R. Letendre
  • Patent number: 5662576
    Abstract: A method and apparatus for manufacturing an improved bag for the cultivation of mushroom spawn is provided. The bags have continuous gas permeable sealing strips sealed to the inside walls of the bags which cover openings in the bag, so as to allow the bag to be vented without loss of moisture. The openings and sealing strips are positioned close to the top and bottom of the bag so as to maximize air flow through the mushroom spawn without creating dry spots, thereby improving spawn yield. The apparatus includes rollers for dispensing plastic film and at least one continuous hydrophobic strip of material. A series of apertures are punched by cutting dies in the film, and a vacuum system removes the cut out portions. The strip of material is positioned over the apertures and sealed by sealing dies over them, so as to enclose the apertures. A cutting dies cuts off the film and strips. A conventional bag making machine then forms the bags.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: September 2, 1997
    Assignee: Compac International, Inc.
    Inventors: Gregory S. Sprehe, Lester Siebert, William Towne
  • Patent number: 5630779
    Abstract: A system for suspending a pack of thermoplastic bags, loading bags, removing loaded bags and for automatically opening the next bag preparatory to loading it by having a pack of handled bags suspended from laterally spaced elongated rods of a rack. A novel gradually releasably adherent bond is created between the rear wall of a leading bag and the front wall of a following bag in the bag pack. As the leading bag is removed from a bag rack, the bond will gradually and fully open the mouth and body of the following bag for loading.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: May 20, 1997
    Assignee: Tenneco Packaging
    Inventors: Lawrence J. Glod, Richard E. Leone
  • Patent number: 5542902
    Abstract: A vented pouch arrangement is described which comprises: first and second opposed panel sections; a base gusset member; and, a gas filter arrangement oriented in one of the panel sections. The gusset member is preferably oriented between the panel sections; along ends thereof, to form a base by which the arrangement can be stood up during use. Preferably, the arrangement is provided with a rib and trough closure arrangement extending thereacross. In this manner, opening and reclosing the bag construction, for access to material therein, is facilitated. A method for formation of such a pouch arrangement, and methods of use, are also described.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: August 6, 1996
    Assignee: Kapak Corporation
    Inventors: Cecil Richison, Gary M. Bell
  • Patent number: 5540644
    Abstract: A bag for packing a light-sensitive material is disclosed. The bag has an outermost surface and an innermost surface and is essentially consisting of a material for making the bag which comprises not less than 70% by weight of polyethylene and 1 to 10% by weight of a light shielding material based on the weight of the material, in which a Vicat softening point of the outermost surface is higher by not less than 20.degree. C. than a Vicat softening point of the inner most surface. Further a method for producing a bag is disclosed.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: July 30, 1996
    Assignee: Konica Corporation
    Inventors: Naohita Naraoka, Junichi Tamura
  • Patent number: 5507713
    Abstract: A system for suspending a pack of thermoplastic bags, loading bags, removing loaded bags and for automatically opening the next bag preparatory to loading it by having a pack of handled bags suspended from laterally spaced elongated rods of a rack. The bags have been corona discharge treated to such an extent that the application of pressure will cause adjacently facing regions to releasably adhere together until a moderate force separates them. During removal of a bag from the bag pack at least a portion of the front wall of the next bag will follow the bag being removed for a short distance before separation thereby opening said next bag rendering it ready for loading. An improved means for applying the requisite pressure is disclosed herein.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: April 16, 1996
    Assignee: Tenneco Plastics, Inc.
    Inventors: Lawrence J. Glod, Sr., Richard E. Leone
  • Patent number: 5286248
    Abstract: A flexible pouch formed from a single sheet of plastic material folded over upon itself along an umbrella like fold assembly to provide the opposed walls of a chamber for storing a product and an optional second sheet to form the bottom of the chamber. The walls and the bottom are sealed along their periphery to form the chamber. The pouch has a self-opening spout formed in part by the fold assembly which expands and springs open when the sealed end of the spout is cut off. The fold assembly not only provides a large spout opening, but also provides a spring force which keeps the spout open so that all the product may be emptied from the chamber.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: February 15, 1994
    Assignee: Colgate-Palmolive Company
    Inventor: David P. Dunton
  • Patent number: 5273514
    Abstract: A flexible pouch is made having a gusseted bottom structure and an inwardly folded top structure from two webs. A first web is folded over on itself to form an inverted U-shape portion and excess web material is pushed inwardly at the top of the fold to create a U-shaped fold at the top of the pouch. A second web is moved into contact with the open end to form the gusseted bottom. The webs are sealed and served to form the individual pouches.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: December 28, 1993
    Assignee: Colgate-Palmolive Company
    Inventor: Knud N. Kristensen
  • Patent number: 5273362
    Abstract: Containers are produced from a sheet of flexible material having a thermally bondable inside surface. In one embodiment flaps are formed and folded outwardly to form two windows in the sheet. Pleats are formed and bonded to transverse the windows so that a pleat ply closes the windows. The pleats are folded to bring the flaps against the window closing pleat plies and bonded. In another emobdiment holes are cut in the sheet located in one ply of the pleats.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: December 28, 1993
    Assignee: Jebco Packaging Systems, Inc.
    Inventor: Jerry E. Buchanan
  • Patent number: 5273511
    Abstract: A method for providing a welded side seam area in a plastic bag or package having interlocking male and female profile sections on plies of plastic sheeting material includes the provision of cut-outs through one of the male and female profile sections and contiguous plastic sheeting material at preselected intervals therealong. The welds, which may be provided by a seal bar or jaws, are provided along lines including or passing through the cut-outs. A thinner and more leak-resistant side seam area between bags or packages is the result.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: December 28, 1993
    Assignee: Illinois Tool Works Inc.
    Inventor: Hugo Boeckman
  • Patent number: 5254073
    Abstract: A vented pouch is described which comprises: first and second opposed panels; a base gusset; and, a gas filter arrangement oriented in one of the panels. The gusset member is preferably oriented between the panels, along edges thereof, to form a base by which the pouch can be stood up during use. Preferably, the pouch is provided with a rib and trough closure arrangement extending there across. A preferred method for formation of preferred such pouches is also described.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: October 19, 1993
    Assignee: Kapak Corporation
    Inventors: Cecil Richison, Gary M. Bell
  • Patent number: 5244450
    Abstract: To make blocks of bags having blocked stubs, which are joined by perforation lines substantially only to the lower opening-defining edge of each block, which lower edge is separated by a substantially continuous slit from the upper opening-defining edge, a tubular web of synthetic thermoplastic material is formed in partial regions with perforation lines extending through both plies. Only the upper ply is cut to form separating slits extending substantially throughout the width of that upper ply. The bags are then separated from the tubular web by hot-wire welding and are stacked.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: September 14, 1993
    Assignee: Windmoller & Holscher
    Inventor: Uwe Koehn
  • Patent number: 5242365
    Abstract: A package having a separable overlay is formed by a high speed web roll manufacturing method and adapted for multiple marketing of retail goods. The package has at least three layered sheets of flexible material, the outermost sheet being quickly and easily removable from the remainder of the package without disruption thereof. The package may thus be converted from one for marketing goods under a label of a seasonal or special nature to a package for marketing goods under a label of a general or everyday nature, to thereby extend the profitable shelf-life of the package.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: September 7, 1993
    Assignees: Anco Collector Supplies, Inc., Zim's Bagging Company, Inc.
    Inventors: Mary C. Counts, Harry Zimmerman, Jr.
  • Patent number: 5226858
    Abstract: A method and apparatus for producing bags interconnected at their open ends by forming transverse seals across a flattened longitudinal tube of film material and utilizing a cutting die to cut a transverse weakened line across the tube intermediate the transverse seals and to cut a pair of handle openings, one on each side of the transverse weakened line.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: July 13, 1993
    Assignee: Equitable Bag Co., Inc.
    Inventor: Michael Snowdon
  • Patent number: 5203758
    Abstract: This invention relates to a method for manufacturing a sack or bag with a bottom being rectangular in the filled state and with a handle portion, and it also relates to sacks or bags manufactured in accordance with this method. For the solution of the problem to simplify already known methods, onto a continuously advanced flat web two strips of sealing-wax which are in parallel to each other and perpendicular to the lateral edges are applied on one side at distances of one bag length, respectively, and at corresponding locations of the back side of the flat web four short strips of sealing-wax are applied, and between the strips of sealing-wax two reinforcements are glued thereto with their whole surface. Below the first reinforcement a folded sheet with a leg is glued, whereas the other leg is folded back thereonto. Below the second reinforcement an area is provided with glue which in size corresponds to the leg. On one side of the flat web an adhesive strip is applied.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: April 20, 1993
    Assignee: Windmoller & Holscher
    Inventors: Fritz Achelpohl, Werner Jurgens
  • Patent number: 5147272
    Abstract: A vented pouch is described which comprises: first and second opposed panels; a base gusset; and, a gas filter arrangement oriented in one of the panels. The gusset member is preferably oriented between the panels, along edges thereof, to form a base by which the pouch can be stood-up during use. Preferably, the pouch is provided with a rib and trough closure arrangement extending thereacross. A preferred method for formation of preferred such pouches is also described.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: September 15, 1992
    Assignee: Kapak Corporation
    Inventors: Cecil Richison, Gary M. Bell
  • Patent number: 5127893
    Abstract: A reinforced collapsible bag and method of making it from blanks of a flexible woven material which are cut from an elongate web substantially without wasting any material between adjacent blanks with pairs of reinforced strips extending along the side edges and through the central portion of the sides and top and bottom of the bag, thereby reinforcing the bottom, top, sides and corners of the bag. Each blank has a circumferentially continuous central portion and four isosceles triangular portions at each end of the blank. Adjacent sides of adjacent triangular portions are connected together to provide, when the bag is expanded or filled, generally square ends which are interconnected by generally rectangular side walls. Lifting straps can be attached to the reinforced strips along the side edges of the bag. An access opening is provided in an end of the bag by terminating the connections of its triangular portions short of their apexes.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: July 7, 1992
    Assignee: Custom Packaging Systems, Inc.
    Inventor: Lee Lafleur
  • Patent number: 5098364
    Abstract: A method for manufacturing a liner for a waste container is provided, comprising the steps of extruding a flexible envelope, the envelope having ends; flattening the envelope so as to form a top side and a bottom side; cutting a lengthwise slit in the top side of the envelope substantially along the centerline of the envelope; sealing the ends of the envelope; folding the envelope along the centerline; and rolling one end toward the other to form a rolled bundle. A waste container liner may be formed by this process, comprising a flexible envelope including a top side; a bottom side; first and second ends; gusseted side panels connecting the top side and the bottom side; a lengthwise slit in the top side between the first and second ends substantially along the centerline of the envelope; and wherein the top and bottom sides are sealed together at the first and second ends.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: March 24, 1992
    Assignee: Pactec, Inc.
    Inventor: Michael R. Schilling
  • Patent number: 5096516
    Abstract: Dual flexible plastic pouches and a method of making the pouches where the pouches are reuseable and reclosable and have a double fastener strip arranged along the center between the pouches, the double strip is formed with a lower layer and upper pull flanges folded in from the edge of the lower layer with the pull flanges having reclosable rib and groove elements between the flanges and lower layer, an upper film web is juxtaposed over the lower web and bonded thereto over the peripheral edge to form pouches, the flanges are heat sealed to the upper web with a heat blocking thermal barrier between the flanges and lower layer of the fastener to prevent unintentional bonding.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: March 17, 1992
    Assignee: Zip-Pak, Incorporated
    Inventors: Daniel P. McDonald, Donald L. Van Erden
  • Patent number: 5080643
    Abstract: An improved method of making a stand-up plastic bag in which the side seam seals are formed at the same time as the gusset wall seals. The method includes the steps of supplying the film, folding the film to form the gusset, simultaneously forming the heat seals for the gusset walls and the side seams at one temperature, forming the heat seals to join the gusset walls together at a higher temperature, and separating the film into completed bags. The improved method provides greater efficiency and increased production rates.
    Type: Grant
    Filed: June 5, 1990
    Date of Patent: January 14, 1992
    Assignee: Dow Brands Inc.
    Inventors: David W. Mitchell, Roger D. Vrooman
  • Patent number: 5078667
    Abstract: The instant invention relates to a handled thermoplastic bag made of a thermoplastic film comprising a high density polyethylene or a major amount of high density polyethylene and a minor amount of one or more other polymers, e.g., linear low density polyethylene. The handled bag is characterized by a front and rear bag wall, a closed bottom and an open mouth top portion having a pair of laterally spaced handles, said front and rear bag walls, between said handles defining an open bag mouth and is further characterized as comprising a smoother cut-out edge at corner portions of the open bag mouth than provided at said lower mouth edge whereby the smoother cut-out edge of the corner portion reduces the tendency of the thermoplastic film to tear at the corner when subjected to stress.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: January 7, 1992
    Assignee: First Brands Corporation
    Inventor: John W. Williams
  • Patent number: 4997416
    Abstract: An improved method of making a stand-up plastic bag in which heated pins are used to seal the gusset walls. The pins are heated at a temperature lower than melting point of the thermoplastic which forms the exterior contiguous portions of the gusset walls. The method includes the steps of supplying the film, folding the film to form the gusset, forming the heat seals for the gusset walls and the heat seals for the side seams at one temperature, forming the heat seals joining the gusset walls together at the same temperature using a heated pin seal bar, and separating the film into completed bags. The improved method provides greater efficiency and increased production rates.
    Type: Grant
    Filed: June 5, 1990
    Date of Patent: March 5, 1991
    Assignee: Dow Brands Inc.
    Inventors: David W. Mitchell, Roger D. Vrooman
  • Patent number: 4995860
    Abstract: An easy opening bag pack and supporting rack system is provided which includes a plurality of gussetted bags of the T-shirt type or of the flat top type provided with bag mounting apertures through all of the bag walls on opposed sides thereof and additional cuts in the front wall portion and the front section of the gussetted side wall portions and in communication with the bag mounting apertures therein for effectively enlarging such apertures. A rack mounts the bag pack through the mounting apertures and includes stub shaft supports laterally spaced from each other and being a length less than the outwardly extending dimensions of an open bag and greater than the thickness of the bag pack and include an enlarged portion on the free outer ends thereof of greater dimensions than the bag mounting apertures.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: February 26, 1991
    Assignee: Sonoco Products Company
    Inventor: Harry B. Wilfong, Jr.
  • Patent number: 4976674
    Abstract: The bottom of a gusseted, square-bottom bag is sealed by applying a fin seal, a cross seal which intersects the fin seal, and a third seal at the intersection of the fin seal and the cross seal.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: December 11, 1990
    Assignee: American Packaging Corporation
    Inventors: Gilbert N. Yannuzzi, Jr., Jeffrey D. Muhs
  • Patent number: 4974968
    Abstract: A tubular bag is made of synthetic thermoplastic material preferably provided with side gussets. The bag is closed at one end by a transverse seam weld and at the other end has an opening which is defined by edge portions of respective side walls of the bag which lie one on the other when the bag is collapsed. One side wall of the bag is provided with narrow lugs, which protrude from the opening-defining edge portion of one side wall and which are formed with holes for retaining pins on which the bag can be suspended.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: December 4, 1990
    Assignee: Windmoller & Holscher
    Inventors: Friedhelm Mandus, Fritz Achelphol
  • Patent number: 4954124
    Abstract: A stand-up plastic bag has a pair of front and rear side walls defining an open bag mouth at upper edges thereof, and a pair of front and rear bottom gusset walls being disposed between the side walls. The walls are composed of a multi-layered film of different, heat-sealable, coextruded thermoplastics, such as polyethylene and Nylon. Polyethylene is on the interior surfaces and Nylon is on the exterior surfaces of the walls. The gusset walls have upper portions interconnected together to form a bottom wall extending between the front and rear side walls. The gusset walls also have lower portions joined by heat seals to lower portion of the front and rear side walls at contiguous portions of polyethylene material on their interior surfaces to form a support band which connects to and extends below the bottom wall.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: September 4, 1990
    Assignee: The Dow Chemical Company
    Inventors: Laurence R. Erickson, R. Douglas Behr, Roger D. Vrooman
  • Patent number: 4950217
    Abstract: An arrangement in a bag-making machine for forming bag-defining lines of perforation and weld lines in an elongate web (7) comprises a driven roller nip including a nip roller (4) and a backup roller (5), by means of which the web (7) is fed through the machine (1), an elongate cutter (10) which is parallel to the rollers (4, 5) and rotatable about its longitudinal axis, and which when rotated is moved into engagement with the back-up roller (5) for making the lines of perforation, and two welding units (8) with sealing jaws (22) for making the weld lines. In order to allow optional adjustement of the spacing between consecutive lines of perforation and weld lines, the cutter (10) is separately connectible and disconnectible independently of the operation of the roller nip (4, 5) or of other drive means in the machine (1).
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: August 21, 1990
    Assignee: Fas Converting Machinery Aktiebolag
    Inventor: Jan N. Stenqvist
  • Patent number: 4946431
    Abstract: A method for making block of side-gussetted, bottom-weld bags. Each bag has an opening on one side to fascilitate the removal of individual bags from the block.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: August 7, 1990
    Assignee: Katana Corporation
    Inventor: Harold A. Jensen
  • Patent number: 4931034
    Abstract: A process for the production of bags from thermoplastic synthetic resin sheeting with a bottom seam and/or a lateral seam fashioned as a cutoff weld seam obtained by severing tubular film sheets in the bottom zone, wherein there is produced by heat contact welding, at a station upstream of a transverse seam cutoff welding of the bottom seam or lateral seam, a wide flush weld seam over the entire width of the tubular film sheet and/or of the bag bottom to be produced, and subsequently the transverse cutoff weld seam is formed over the flush weld seam, extending within the flush weld seam.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: June 5, 1990
    Assignee: Stiegler GmbH Maschinenfabrik
    Inventor: Robert Wagner
  • Patent number: 4931033
    Abstract: A method of making plastic bags in an in-line production stream having hand holes reinforced by double ply plastic material in which the molecular orientation of the plastic material extends across the bags and generally parallel to the upper ends of the bags. The method includes forming a longitudinal gusset along the upper ends of the bags in the machine direction of the plastic extrusion, slitting the inner fold line of the gusset, sealing the inner slit ends longitudinally to the adjacent front and back walls of the bags, forming transverse seals to close the side edges of the bags and separating the bags along the transverse seals.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: June 5, 1990
    Assignee: Equitable Bag Co., Inc.
    Inventor: Dennis Leeds