Abstract: A double-headed tube structure comprises a tube body, a first tube head, an annular retaining member and a second tube head. The first tube head and a first end portion of the tube body are hermetically connected together. A second end portion of the tube body is sleeved on an outer circumference of the annular retaining member. The second end portion of the tube body, the annular retaining member and the second tube head are hermetically connected together. The annular retaining member communicates with the tube body and the second tube head. The first and second tube heads are sealedly welded at both ends of the tube body by a two-step forming process. Through the annular retaining member, the tube body is not deformed in the two-step forming process, thereby improving the welding and sealing effect.

Abstract: A double-headed tube structure and a double-headed tube structure are disclosed. The method includes the steps: a first tube head being sealedly welded to a first end portion of a tube body using a first mold, and then the first mold being removed; a second mold being inserted through the first tube head to a second end portion the tube body, the second end portion, an annular retaining member and a second tube head being sealedly welded together, and then the second mold being removed. The structure is that the second tube head is sealdedly welded to the tube body through the annular retaining member. The first and second tube heads are sealedly welded at both ends of the tube body by a two-step forming process. Through the annular retaining member, the tube body is not deformed in the two-step forming process, thereby improving the welding and sealing effect.

Abstract: A plastic or other film bag is formed from a continuous extruded tube. The tube is flattened and sealed across its width at intervals to form bag bottoms. The bags are joined to one another at a perforation line and folded in thirds lengthwise prior to being rolled into a compact roll, either with or without supporting core. After folding the bags may be chisel cut through the center of the perforation line to assist in dispensing of the bags. The chisel cut will extend through all layers of the bag when folded, resulting in three chisel cuts in the bag. The bags may be gusseted for part or as much as all of their width. The bags may also be corona treated and printed on their outer surfaces. The bags may be formed from partially recycled materials and various combinations of linear low density, medium and high density polyethylene.

Abstract: A plastic or other film bag is formed from a continuous extruded tube. The tube is flattened and sealed across its width at intervals to form bag bottoms. The bags are joined to one another at a perforation line and folded in thirds lengthwise prior to being rolled into a compact roll, either with or without supporting core. After folding the bags may be chisel cut through the center of the perforation line to assist in dispensing of the bags. The chisel cut will extend through all layers of the bag when folded, resulting in three chisel cuts in the bag. The bags may be gusseted for part or as much as all of their width. The bags may also be corona treated and printed on their outer surfaces. The bags may be formed from partially recycled materials and various combinations of linear low density, medium and high density polyethylene.

Abstract: A plastic motion sickness receptacle is disclosed having a seamless perimeter defined by a tubular member folded at a first closed end, and an open end including means for closing the receptacle after use. The plastic tubular member comprises integrally formed walls that terminate in a base at said closed end with the edges of the walls cooperating to form a fluid-tight relationship. An outer surface of the receptacle may include indicia printed thereon including instructions for using the bag upon the occurrence of motion sickness.

Abstract: A plastic or other film bag is formed from a continuous extruded tube. The tube is flattened and sealed across its width at intervals to form bag bottoms. The bags are joined to one another at a perforation line and folded in thirds lengthwise prior to being rolled into a compact roll, either with or without supporting core. After folding the bags may be chisel cut through the center of the perforation line to assist in dispensing of the bags. The chisel cut will extend through all layers of the bag when folded, resulting in three chisel cuts in the bag. The bags may be gusseted for part or as much as all of their width. The bags may also be corona treated and printed on their outer surfaces. The bags may be formed from partially recycled materials and various combinations of linear low density, medium and high density polyethylene.

Abstract: A bumper pad for use in cushioning and protecting packaged articles is provided. The bumper pad is made primarily from paper and comprises an arced top member glued or otherwise affixed to a flat base along longitudinal edges. The bumper pad can be placed around the packaged article between the article and the outer packaging, which can be a cardboard sleeve, stretch wrap film or other packaging material. The arced top member preferably is formed using a linear draw process.

Abstract: An apparatus for producing double-walled composite tubes, which have an outer wall with wave peaks and wave valleys and a smooth inner wall, includes two of rows first and second shaping-jaw halves which, along a common shaping section, form a shaping tunnel. The first shaping-jaw halves are located opposite each other in the shaping section and have an inner contour forming a tube socket portion. The second shaping-jaw halves, also located opposite each other, include transverse grooves alternating with transverse fins. A sizing mandrel, which defines narrow vacuum grooves spaced apart from one another in the axial direction on its outer lateral surface, projects into the shaping tunnel and forms the smooth inner wall of the composite tube. A vacuum control valve device provides for defined closure and reopening of the vacuum grooves when positioned in correspondence with the tube socket portion.

Abstract: A packaging container for a pressurized, liquid food, the packaging container being formed from a packaging laminate which includes at least one core layer of paper or paperboard displaying one major fibre orientation in a first direction thereof. According to the invention, said core layer is pre-strained in a second direction which is substantially at right angles to said first direction, with a view to reducing or eliminating expansion in the finished, filled packaging container during storage thereof. The present invention also encompasses a packaging laminate for the packaging container, as well as a method of producing the packaging container.

Abstract: A grinding apparatus for grinding away sharp edges on an end of a textile package having an inner edge and a spaced-apart outer edge formed on the end of the package. The apparatus has a base, a first grinding element mounted on the base for movement relative to the textile package and having a grinding surface with an angle oblique to the inner edge of the textile package for being urged against the inner edge of the textile package, and a second grinding element mounted on the base for movement relative to the textile package and having a grinding surface angle with an angle oblique to the outer edge of the textile package for being urged against the outer edge of the textile package. According to one preferred embodiment of the invention, a third grinding element is mounted on the base for movement relative to the textile package. The third grinding element has a grinding surface for engaging and grinding the end of the textile package between the inner and outer edges.

Abstract: Spirally-wound circular side walls may be re-formed into non-circular geometries which are then mechanically joined to conformably shaped non-circular closure disks and thereby produce non-circular two-piece paperboard container lids.

Abstract: An apparatus and method are disclosed for reducing the force required to expel a catamenial tampon from a tampon applicator. The tampon applicator is also disclosed. The tampon applicator includes a first member which is capable of housing an absorbent tampon. The first member has an inside diameter, first and second spaced apart ends, and an insertion tip formed adjacent to the first end. The insertion tip at least partially closes the first end of the first member and facilitates insertion of the tampon applicator into a woman's vagina. The insertion tip is opened, expanded and reclosed prior to positioning the tampon in the first member. This action allows the insertion tip to be reopened with a minimum amount of expulsion force. The apparatus includes a first punch having an outside diameter which is sized slightly less than the inside diameter of the first member. This enables the first punch to slide within the first member from the second end toward the first end.

Abstract: The invention provides a method and apparatus for the manufacture of helically wound paperboard tubes having a highly uniform outside diameter. The method of the invention involves the application of controlled compressive force to at least one of the paperboard plies fed to a helical winding operation in order to control the thickness of the ply or plies and thereby control the outside diameter of the helically wound tube. In one preferred apparatus embodiment of the invention, the compressive force applied to the paperboard ply is applied via a pair of cooperating compression rolls. The nip between the two cooperating rolls is controllably varied by mounting one of the rolls for rotation about a shaft which is rotatable about an eccentric axis which is parallel to and offset from the axis of rotation of the roll. The rotation of the shaft thus causes the roll to move toward or away from the other cooperating roll and thereby varies the nip spacing between the rolls.

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.

Abstract: A method and a device for scrap-free manufacture of coated profiles and thermoformed containers.A hollow pipe having a cross-section suitable for the desired profile is extruded.The extruded hollow profile is cut longitudinally.Thereafter the profile is planar laminated by a web formed material having desired characteristics.The cut, laminated profile thereafter is formed into the original shape thereof, or another suitable shape, and is formed into container casings.When thermoforming containers, a hollow profile is extruded from a thermoformable material in an extruder, this hollow profile is cut, in one or several longitudinal cuts. In web or roller form such cut profile is supplied to a so called scrap-free thermoforming machinery, where the thermoformed containers are manufactured.

Abstract: The invention provides a method of forming single or multi-wall plastic tubing and more particularly, in forming single or multi-wall plastic bags wherein the seal area is strengthened by utilizing a plurality of extruded layers of adhesive material in the seal area. This would particularly be the case for valved bags.

Abstract: An extruded cylinder of plastic material having open ends and die-cut flaps on opposite sides is a supporting holder for limp plastic bags. The holder is formed by an inexpensive process of extruding plastic and cutting the tube into cylinders of the proper length and simultaneously die-cutting the flaps in the sides of the cylinder. The holder is flattened during manufacture and packaged in the flattened condition.

Abstract: A self-raising post of a plastic material, such as PVC, for use as a roadside marking post, a traffic sign post, a lamp post, or for other comparable uses in road traffic environments, has a channel-shaped bending zone with substantially arcuate cross-section and with the convex side facing the on-coming traffic. The cross-sectional area of the bending zone increases progressively towards the lower end, whereby the flaring-out zone formed upon bending of the post will be larger below than above the line of bending. The greater inherent resiliency of the material below than above the line of bending will cause the post to bend back into an upright position after having been hit by a vehicle. Certain embodiments of the posts are manufactured by diagonally splitting lengths of extrusion-molded plastic tubing, forming two identically shaped posts from each tube length.

Abstract: Multi-layered enclosures are provided which include extruded tubing laminated between two extruded sheets of coextruded film in order to rapidly produce an unusually tough enclosure having longitudinal side walls that are free of internal seams while providing superior fluid barrier properties. When desired, the multi-layered enclosure is transformed into a multi-layered bag or pouch by sealing the multi-layered enclosure together along one or more locations interconnecting the longitudinal or side edges of the multi-layered enclosure to thereby cross seal together the sheets, the tubing, and the internal surfaces of the tubing.

Abstract: A method of simultaneously flanging and cutting tubular bodies by scoring the tubular bodies on each side of the cut is disclosed.

Abstract: A reinforced receptacle for bulk materials is constructed from a two-ply plastic tube having a reinforced sheet wrapped and overlapped about the two-ply plastic tube. The reinforced sheet is adhesively secured to the two-ply tube, and the lower end of the two-ply tube is folded and adhesively secured together to form a folded satchel bottom for the receptacle. The upper end of the two-ply tube is gathered and clamped to provide structure for lifting the receptacle.

Abstract: A method and apparatus for forming a smooth surface in the side seam area of the end of a convolute paperboard can body.