Abstract: Pet food bags, and methods of making the same, contain a seal that resists air exchange more than conventional bags thereby protecting nutritional ingredients that are susceptible to oxidation.

Abstract: A method of induction welding a first thermoplastic composite (TPC) to a second thermoplastic composite (TPC) includes inductively heating a weld interface area between the first TPC and the second TPC, and cooling a surface of the first TPC opposite the weld interface area while inductively heating the weld interface area.

Abstract: The present disclosure provides a seal bar. In an embodiment, the seal bar comprises a base member having a flat front surface and a flat recessed surface a distance (d) behind the front surface. The front surface defines an x-axis, X. The flat recessed surface has a first endpoint (A1), wherein an axis that is perpendicular to the flat recessed surface at the first endpoint (A1) defines a first y-axis (Y1). The seal bar has a concave surface extending the distance (d) between the first endpoint (A1) and a point (B1) on the flat front surface. The concave surface defines a quadrant arc segment of an ellipse between the first endpoint (A1) and the point (B1).

Abstract: A method and a device for producing and filling sacks with at least four longitudinal seams provide a more cost-effective approach to producing and filling sacks. The material that forms the sacks is supplied from an unwinding device in the form of a tubular material to a sack forming device. The tubular material is provided with longitudinal seams in the sack forming device, with the seams extending over a major part of the sacks.

Abstract: For the continuous production of tobacco bags from a sheet-material web (19), the latter is, in the first instance, folded in the region of a folding device (30) to form a continuous web leg (20) corresponding to a pocket of the bag. The web (19) prepared in this way is directed through a sealing subassembly for the purpose of providing transversely directed connecting seams as a lateral boundary to the pockets of successive bags. The sealing subassembly (31) is arranged in an upright position with sealing devices one beneath the other. The web (19) is directed through the sealing subassembly (31) in an upright plane and is largely free of tensioning during the sealing operation.

Abstract: An apparatus for manufacturing a cushioning package containing an article to be packaged, characterized by comprising an article storage space forming unit that forms an article storage space by overlapping a cushioning sheet that includes small cells that inflates with air filled therein, a sheet adhering unit that adheres the overlapped cushioning sheet together and closes an article storage opening, an article disposing unit that disposes an article to be packaged in the article storage space, and an air-filling unit that fills air in the small cells.

Abstract: Air conducting connector with simplified wiring layout and water-proofing. Connector 2 has air conduction path 3, having a first opening 3a and a second opening 3b. A heater wire 5, air conducting wire and terminal 6 of ECU side are inserted into the first opening 3a, while an air-conducting heater wire 7 and terminal 8 of sensor side are inserted into second opening 3b. Within the air conduction path 3, the ECU side terminal 6 and the sensor side terminal 8 are electrically interconnected. First opening 3a is sealed with resin. The rear part of the air conduction path 3 is sealed with a sealing material 8b. The sensor side terminal 8 and the ECU side terminal 6 are electrically interconnected on insertion to communicate an air conducting part of the sensor side heater wire 7 with an air conducting part of the ECU side heater wire 5 through air conduction path 3.

Abstract: A technique involves making mono-axially oriented draw tape. The technique involves forming a solid sheet of thermoplastic material from molten thermoplastic material, and producing a set of draw tape feeds from the solid sheet of thermoplastic material. The technique further involves stretching and annealing the set of draw tape feeds to orient molecules within the set of draw tape feeds such that tensile strength of each draw tape feed is greater in a first direction than in a second direction which is substantially perpendicular to the first direction. As a result, the draw tape feeds are extremely strong in the first direction and well-suited for use in draw tape bags.

Abstract: A method and apparatus for forming a bottom closure of a container employing multiple assembly lines and including a universally foldable seal fin as a part of the bottom closure. A novel blank for the container is disclosed.

Abstract: A fastener tape for use in the manufacture of reclosable plastic bags is provided. The fastener tape comprises an intermediate layer and a reclosable fastener profile thereon. The intermediate layer includes three layers of co-extruded plastic, with not more than 4% EVA as the outer two layers and HDPE as the middle layer. The intermediate layer is folded so as to bring portions of the intermediate layer into an opposing relationship. These opposing portions are then sealed together by a pair of seal bars. By carefully controlling the sealing temperature, a consistent peel seal is created between the opposing portions of the intermediate layer without the need for an adhesive.

Abstract: A tube-forming apparatus in a bag-forming, filling, and sealing machine has a longitudinal seam heat-sealing device for connecting edge regions of the packing material belt that are placed against each other inside surface to inside surface. In order to achieve a sufficient sealing temperature in a short time, a heating body that is embodied in a lamella-like fashion protrudes like a tongue between the edge regions. In order to aid the heating body, similar heating bodies rest against the outside of the edge regions. The heating bodies have a U-shaped electric resistance wire with elongated legs which is embedded in a longitudinally folded casing made of a thin, temperature-proof woven cloth.

Abstract: A process of cold sealing two layers of plastic film material together is used as part of the structural element of a plastic bag made from plastic film. The bag has a closed bottom, a continuous closed periphery, and an open top. The improvement provides the bag with a cold seal, which cold seal does not form a part of the closed bottom and continuous closed periphery of the bag. In the improved process, it is required that the first and second plastic films of the bag be confronted to one another in a disposition for sealing. Compression dies are provided on at least one side of the juxtaposed first and second plastic films, the compression dies are provided with the size and shape of the cold seal desired. Impressing of the compression dies across the juxtaposed first and second plastic films occurs. This impressing is at a temperature and pressure sufficient to fuse the first and second plastic films together.

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: 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.

Abstract: The two separable elements of a conventional plastic zipper are advanced through a zipper guide slot from the inlet to the outlet end of a machine, simultaneously with two sections of a plastic film or web, one section of which overlies one of the zipper elements, and the other section of which overlies the other zipper element. Intermittently two jaws are advanced toward the web sections to squeeze them against opposite sides of the zipper, at which time a pair of registering hot bars that are resiliently mounted on the jaws adjacent the inlet end of the machine fuse each web section to a different one of the two zipper elements. At the same time, a pair of cold bars carried by the jaws adjacent the outlet end of the machine engage and cool portions of web sections which were previously fused to the two zipper elements. Idler rolls inclined to the zipper guide slot retain the folded web tautly over opposite sides of the zipper guide slot.

Abstract: The present invention relates to a method of heat sealing fitment tubes to pouches or bags of flexible film using a pair of hot bars. Also disclosed is the use of warm bars or cold bars to cool the hot bar seal. An apparatus for producing pouches with fitment tubes sealed thereto as well as the pouches so produced is also disclosed.

Abstract: The present invention relates to a method of heat sealing fitment tubes to pouches or bags of flexible film using a pair of hot bars. Also disclosed is the use of warm bars or cold bars to cool the hot bar seal. An apparatus for producing pouches with fitment tubes sealed thereto as well as the pouches so produced is also disclosed.

Abstract: An apparatus for manufacturing air-cushion dispatch packages, the apparatus comprising an unwinding mechanism for paper webs and air-cushion foil webs. The apparatus introduces air-cushion foil webs between the paper webs and seals each paper web to a foil web over a large area. Transverse and longitudinal sealers seal the edges of the packages. After each sealing operation, the webs are subsequently cooled. Pulling rollers press the paper webs in the edge regions of the packages and advance the webs. Cutters cut the dispatch packages to the desired format. Web controllers correct deviation of the paper webs. A cycle controller is included.

Abstract: A process and apparatus for sealing plies of thermoplastic material included in laminated sheets having thickened sections in a manner such that strong side seals result with substantially no delamination of one or more plies of a laminated sheet comprises performing a first blocking operation on the laminated sheets by application of heat and pressure through a first pair of seal bars having an effectively matched cross-section such that the laminated sheets remain substantially planar during the first blocking operation. A second blocking operation is performed over the previously blocked areas by the application of heat and a soft pressure through a second pair of seal bars having an effectively matched cross section such that the laminated sheets remain substantially planar during the second blocking operation.

Abstract: To make plastic carrying bags or sacks, sections are cut or are severed by hot wire welding from a gusseted tubular film by a formation of transverse seam welds and transverse severing cuts or by hot wire-welded transverse seam welds. At least in their bottom portion the sections are provided with corner seam welds, which are separately formed in the two folds and which diverge obliquely from the outer fold lines toward the top and/or bottom seam weld and terminate short of the inner fold line and merge into the latter. To prevent in the making of the carrying bags an elongation of the intermediate portion of the tubular film, the latter is initially formed with corner seam welds only in one fold of each of the two gussets before the transverse seam welds and transverse severing cuts or hot wire-welded transverse seam welds are formed. When said corner seam welds have cooled, congruent corner seam welds are formed in the respective other folds.

Abstract: The blanks punched out from a film web and folded to form the jacket are then heated for a short time and cooled again in order to eliminate stresses in the jacket material which give rise to deformations and are also produced by the action of heat during processing of the material.

Abstract: This invention relates to a transverse sealing mechanism for use in producing bag-packed products by packing products in tubular film. The transverse sealing mechanism comprises compression-and-heat sealing means and compression-cooling and compression-cutting means disposed immediately below said sealing means, each of these means having a mechanism which can increase its compressive force infinitely. The packed bag transverse sealing mechanism provides for storing and perfect seals.

Abstract: A thermoplastic tape having thick and wide end portions with a relatively thin and narrow stretched central portion between them is produced by a first pair of nip rolls running at a slow speed, and a second pair of nip rolls running at a higher speed. The tape between the nip rolls is intermittently moved away from, and toward said first nip rolls to stretch it to produce the relatively thin and narrow central portion. The second pair of nip rolls is mounted on a pivoted arm so that they are movable toward, and away from said first nip rolls. Alternatively, an idler roll between the two pairs is moved toward, and away from, the first nip rolls.

Abstract: A machine for making plastic bags, such as trash or garbage bags, includes a rotary sealing drum of variable diameter, the drum including one or more sealing bars for cross-sealing a flattened plastic film tube passing through the machine. A blanket tensioning system surrounds the drum and is adjustable to compensate for different drum diameters. The sealed film passes over a chill roll after leaving the drum-blanket assembly and is drawn over folding boards by pull rolls. The sealed and folded film is then perforated by a fly knife and is preferably also cut on the sides to produce a connected series of bags which may easily be separated from one another to make the bags suitable for easy dispensing packages. A variator assembly may also be provided to insure a proper skirt length between the cut-perforation and the bag seal.

Abstract: A method and apparatus for hermetically heat sealing flexible containers, and particularly pouch-like containers, is disclosed. A filled pouch is positioned between a pair of heated bars, with the bars being constructed and arranged to maintain a gap therebetween, such that pressure is not applied to the pouch. Thereafter, the pouch is positioned between a pair of chilled sealing bars and the chilled bars are constructed and arranged to apply sealing pressure to the edge of the pouch, where the edge region of the pouch is sealed and cooled. If desired, a plurality of gapped heated bar stations may be provided prior to the chill bar position.

Abstract: Process for forming a scrim-reinforced film wherein a molten, film-forming plastic, such as polyethylene, in a high state of fluidity is fed onto an unsupported scrim and solidified by cooling to produce a scrim at least substantially completely enclosed and surrounded by the plastic. The film, thus produced, can be formed into a high strength bag container by a folding and cutting operation utilizing hot knife means capable of fusing and thus sealing the plastic. In a preferred embodiment, the plastic is extruded onto the scrim.

Abstract: This relates to a drive system for selectively positioning a heat sealer and a cooler relative to mandrels supporting bags or pouches, which mandrels are carried by a turret and indexed thereby. A simple oscillating shaft driven by a cam oscillates a double ended lever which, in turn, serves to oscillate wedge shaped cam members so as to simultaneously actuate two sets of heat sealers and coolers with each heat sealer and cooler being carried by a separate support arm.