Abstract: A thermoplastic bag with side or bottom gussets each defined by a pair of overlying panels having selected ends thereof sealed together and between the sealed edges of the front and rear walls of the bag. Each gusset includes a transverse tear line inward of the sealed lower ends of the panels of the gusset, and a transverse glue line bonding the two panels of the gusset to each other inward of the tear line and across the width of the gusset.

Abstract: A carton divider formed of crossing partitions interlocked by interengaged slots extending partially through the partitions from the opposite edges thereof. The slots include continuous hook slots having communicating inner, outer, and intermediate portions, and arrow slots divided into inner and outer portions by cross bars. Each hook slot intermediate portion defines a laterally directed tab extending through the inner portions of an arrow slot. The cross bar of the arrow slot in turn extends through the inner portion of the hook slot and is retained therein by a shoulder defined by the hook slot immediately inward of the tab and overlying the inner portion of the hook slot. The inner portions of both slots include areas narrower than the width of the remainder of the respective slots.

Abstract: An improved fibrous laminate is formed by impregnating a paper-like material with a substantially anhydrous emulsifiable methylene diisocyanate (EMDI) and allowing the EMDI to cure at ambient or higher temperature. EMDI-impregnated laminates, such as tubes and cones show improved strength compared with prior art products and are especially resistant to water.

Abstract: A plastic bag having front and rear walls, an open bag mouth, and a detachable tab upwardly projecting from the front and rear walls centrally along the bag mouth. The tab is integral with the bag walls at a pair of opposed readily severable areas below the bag mouth, and non-integral with the bag walls between the severable areas. The bags are provided in packs with the bag secured at the tabs.

Abstract: A carton divider incorporating planar partitions with internesting slots for a right angular interlocking of the partitions. One partition slot is of a constant width and includes a laterally arcing inner portion. The mating or nesting slot includes an enlarged inner portion with a tab flexibly attached to the inner end thereof, the tab having an elongated opening aligned with the slot and defining spaced side bars interconnected by a cross bar. Upon a nesting of the slots the tab is laterally deflected or cammed by the inner portion of the first slot and the side bars positioned laterally to each side of the other partition, a portion or portions of which are received between the side bars whereby relative rotation between the partitions is prevented.

Abstract: A thermoplastic bag having front and rear walls with smooth upper edges defining an open bag mouth. A pair of laterally spaced integral loop handles extend upward from the bag mouth and include detachable mounting tabs projecting laterally inward from the handles at an intermediate point along the height thereof. The tabs are remote from the bag mouth and, in a bag pack, form the securing area for the bags.

Abstract: A composite tube for yarn winding or the like incorporating a body or base defined by a plurality of spirally wound plies of paperboard or the like, and a structural reinforcement ply about the body. The reinforcement ply, spirally wound in the manner of the body plies, includes adjoining square skived abutting edges forming a continuous spiralled groove which defines the seam area of the ply. A reinforcing and sealing strip is laid as a continuous member within the formed groove, filling the groove and being bonded to all surfaces thereof. The height of the strip is substantially equal to or slightly less than the depth of the groove. The tube is completed by surface defining plies including an inner ply of machine glazed kraft paper and an outer ply of parchment.

Abstract: In a container for accommodating hot liquid fills, an end closure capable of inward deflection in response to a decrease in internal pressure created by thermal contraction as the liquid fill cools. The closure is formed of conventional metal stock and includes, as formed, a central portion domed to define either a concave configuration or a convex configuration as viewed from the exterior of the container. The domed portion, as a step or steps prior to filling, is predeflected, either once or twice depending upon its initial configuration, to arrive at an outwardly domed configuration preparatory to inward deflection in response to the cooling of the product and for the accommodation of an internally generated vacuum.

Abstract: A tampon insertion device comprising an elongated tube of spirally wound laminated paper construction provided with a domed insertion end defined by a series of generally hemispherically cupped petals. The petals are formed in a generally triangular configuration through the removal of tube material by appropriate punch and die apparatus. The insertion end of the tube, preferably prior to the defining of the petals in the tube end, is provided with longitudinal scores oriented to locate a single score extending centrally along each of the formed petals. Additionally, multiple circumferential scores are provided about the insertion end of the tube whereby each formed petal will incorporate multiple transversely extending scores.

Abstract: A system of forming an in situ sleeve of concrete about a pile to provide protective reinforcement for the pile. The system utilizes spirally wound paper molding tubes to define the structural components of the concrete receiving casing or mold, with the mold consisting of a pair of cooperating arcuate tube sections formed from the molding tubes through removal of predetermined width full length portions thereof. The portion removed from the first tube is of a width less than one half of the circumference of the tube and forms a section with an opening of a width normally only sufficient to receive the pile therethrough. The removed portion of the second tube is substantially greater and provides a retained section greater than the defined opening in the first formed section to lie thereover.

Abstract: In die cutting the impression roll is maintained at constant peripheral velocity and the web, while engaged by the die, travels at the peripheral velocity of the impression roll. As the trailing edge of the die approaches the nip formed by the impression and complementary rolls, one or both of the feed rolls driven by the web is clutched into a cam mechanism for positive driving at a constant velocity equal to the die-induced velocity of the web. This constant velocity driving of the web jointly by the die and feed rolls continues until the die releases the web beyond the aligned centers of the treatment rolls when the web comes under exclusive control of the feed rolls.

Abstract: A composite can construction wherein the body wall, adjacent either one or both cap receiving ends thereof, is inwardly compressed to reduce the outside diameter of the tubular body while maintaining the inside diameter. The compression, reducing the thickness of the body wall, also densifies the material thereof without affecting the interior of the container or the structural integrity thereof. The compressed area extends along the length of the container body a distance sufficient to project substantially beyond the bead formed as a metal end cap is seamed to the body, thus providing a recess for facilitating accommodating of the driving wheel of a conventional can opener. The formed bead, utilizing the pre-compressed body portion and the denser material thereof, is relatively narrower and stiffer than the bead conventionally obtained upon the sealing of a metal end cap to a composite tubular body.

Abstract: A composite can construction wherein the body wall, adjacent either one or both cap receiving ends thereof, is inwardly compressed to reduce the outside diameter of the tubular body while maintaining the inside diameter. The compression, reducing the thickness of the body wall, also densifies the material thereof without effecting the interior of the container or the structural integrity thereof. The compressed area extends along the length of the container body a distance sufficient to project substantially beyond the bead formed as a metal end cap is seamed to the body, thus providing a recess for facilitating accommodating of the driving wheel of a conventional can opener. The formed bead, utilizing the pre-compressed body portion and the denser material thereof, is relatively narrower and stiffer than the bead conventionally obtained upon the sealing of a metal end cap to a composite tubular body.

Abstract: In a yarn tube having a yarn-supporting surface, a yarn-receiving pickup groove formed in the surface and extending circumferentially at least partially around the tube. The groove, specifically configured to accommodate both right hand and left hand yarn pickup, has a constant varying width along the length thereof, and either two widest sections or a common widest section capable of allowing "dropping in" and orientation of the yarn from both the right and left. Constantly narrowing sections extend outward from the widest section or sections to a common narrowest section or point to insure proper snagging of the yarn, initially received within the wide section or sections, regardless of the direction of rotation of the tube or the thickness of the yarn. The entire groove is of constant depth with the constant varying width insuring an accommodation and proper gripping of the yarn over a wide denier range.

Abstract: In a yarn tube having a yarn-supporting surface, a yarn-receiving pickup groove formed in the surface and extending circumferentially at least partially around the tube. The groove, specifically configured to accommodate both right hand and left hand yarn pickup, includes an elongated wide center section to allow proper dropping in and orientation of the yarn from both the right and left. Extending outwardly from both ends of the wide center section are elongated narrow gripping sections which insure a proper snagging of the yarn, initially received within the wide section, regardless of the direction of rotation of the tube. The wide section is of a constant width as are the narrow sections. The entire groove is of a constant depth with the groove in the wide section being of a greater width throughout the height thereof than the width of the groove at the corresponding height in the narrow sections.

Abstract: A composite container capable of accommodating an internal vacuum environment within a tubular body of spirally wound paperboard or similar paperbase materials. A hermetically sealed liner is provided coextensive with the interior of the tubular body and adhesively secured thereto throughout substantially the full extent of the interior surface of the body. The liner is spirally wound, defining a spiral overlapped seam with the overlapping edge portion including an underfolded edge flap folded about a fold line prior to adhesive engagement with the overlapped edge portion. The seam fold thus formed has the interior thereof in direct communication with the paperbase body and is capable of ballooning inward, through the entire length thereof, upon generation of a vacuum atmosphere with the container. The vacuum atmosphere can thus be accommodated without affecting the structural integrity of the container.

Abstract: A self-sealing spout for a caulking cartridge or the like wherein the discharge tube of the spout extends through a central aperture in an end panel of the cartridge. The spout includes an enlarged annular base integral with the inner end of the discharge tube and engageable with the inner surface of the end panel about the central tube-receiving aperture. The base includes a flexible sealing lip defined peripherally thereabout by an annular groove, said sealing lip being retained in flexed sealed engagement with an annular inclined wall defined in the end panel. The spout is secured to the end panel by a locking of the flanged periphery of the end panel aperture within a peripheral groove about the discharge tube immediately outward of the base.

Abstract: A system and method of providing electrostatic pick-up of yarn on a rotating carrier tube or the like involving provision and use of an electrostatic generator for the application of a static charge to the leading section of the yarn which is subsequently directed across a spindle mounted rotating carrier in a manner whereby the yarn is adhered to or picked up on the tube by electrostatic attraction, the continuous high speed rotation of the carrier effecting a quick positive achievement of multiple wraps of yarn about the carrier.

Abstract: A composite container comprising a tubular body formed of spirally wound plies of paperboard or the like and an internal vacuum accommodating liner substantially coextensive with the length of the tubular body and adhesively affixed solely at the opposed ends thereof to the tubular body. The container is completed by the mounting of opposed end caps which are hermetically sealed to the adhesively secured opposed ends of the liner for the accommodation of an internally developed vacuum within the liner.

Abstract: A method for providing identificational coloration on a paper ply of a yarn tube or similar article, the invention comprises reverse printing of a dye onto a pervious paper which is coated on the outer surface with a transparent polymer coating, the coating being impervious to the dye. According to the invention, the dye penetrates through the paper but not through the polymer coating, the informational coloration and/or pattern of the dye being clearly visible through the polymer coating to allow ready identification of the yarn or other material carried on the tube.