Abstract: The easy opening end closure for attachment to a can body. The end closure includes a plastic pull tab having a closure tab sealed in a slit which defines a displaceable closure.The pull tab is attached by forging a plastic strip over a lid in a manner such that the plastic is caused to flow and force the metal panel against a cutting edge to form a slit defining a displaceable closure. At the same time the forged plastic flows beneath the adjacent edges of the slit to form a tight seal therein.

Abstract: A thermoplastic container having multilayered sidewalls is compression molded from a multilayer billet having a first and a second thermoplastic layer, the layers being so adapted that when the thermoplastic material of the layers is heated to the heat softened state and a compressive force is imposed thereon, the layers are extruded at differential flow rates into a molding cavity whereby the fastest moving layer forms the flange and exterior surface portions of the container and the slower of the layers forms the interior surface of the multilayer container.A multilayer container, having improved gas barrier properties, which can be sealed by double seaming to metal end closures without fracture, is obtained when the faster moving of the billet layers is comprised of a relatively flexible thermoplastic resin material and the slower moving of the layers is formed from a thermoplastic resin having incorporated therein materials which improve the gas barrier properties of the resin.

Abstract: Plastic containers having improved physical properties are prepared from a composite billet having an outer peripheral area composed of a thermoplastic resin and an inner central core portion composed of the thermoplastic resin modified with a material which imparts improved physical properties such as reduced gas permeability or increased stiffness or rigidity to the resin. The composite billet is molded into a container wherein the billet core is formed into the sidewalls and bottom of the container and the peripheral portion is formed into a flexible thermoplastic flange surrounding the open end of the container which can be doubled seamed to a metal end closure without fracture.

Abstract: Apparatus for forming an end finish on a hollow article having a plastically deformable tubular end portion terminating in an open end of the article. A mold surface surrounds the end portion in juxtaposition with its outer surface, and an expandable tubular membrane is received within the end portion in juxtaposition with the inner surface thereof. The interior of the membrane is sealed from the ambient, elongation of the membrane is restricted, and expansion of the membrane is limited to a lateral zone thereof coextensive with the end portion. The outer surface of the end portion is conformed to the mold surface by subjecting the interior of the membrane to a fluid under pressure to expand the membrane laterally in engagement with the inner surface of the end portion.

Abstract: An improved non-detachable easy-opening end closure wherein the pull tab includes an integral strap member co-operating with the tab attachment rivet to limit the angular displacement of the tab relative to the opening flap, whereby the tab protrusion of the opened end closure is minimized and the tab is more securely attached to the end panel and which also functions to cause the tab and flap to move into the container during opening to a position where it is non-obstructive.

Abstract: A container formed of synthetic resinous material having a bottom structure the outer surface of which comprises a central concavity and a convex heel, the heel surrounding the concavity and merging therewith and with the container sidewall. A plurality of hollow convex ribs, distributed in a symmetrical array, interrupt the outer surface of the concavity and merge smoothly therewith, each rib extending longitudinally in the direction of the heel and downwardly from an inner portion of the concavity. The wall of the bottom structure generally decreases in thickness progressively from the innermost point of the concavity to the sidewall.

Abstract: A washing apparatus is disclosed for removing excess coating material from the interior edge portions of metal containers wherein the excess material is formed by the coating draining down the interior sidewalls of the container after the coating has been applied thereto. The apparatus is provided with means for contacting the interior edge portions of the container in the seaming area with a wash fluid wherein the wash fluid maintained in a receptacle is discharged from a slot contained in the receptacle in the form of a ripple having waves which swell and undulate within the interior of the container to effect a washing action on the coating material accumulated therein to remove the coating material from the interior edge portions.

Abstract: Polyolefin containers having improved gas barrier properties are prepared by forming a billet comprised of a particle mixture of a polyolefin resin, such as polyethylene, an inorganic filler such as CaCO.sub.3 and at least about 13.5% by volume of a vinylidene chloride polymer having a median particle diameter greater than 150 microns. The billet is heated to a temperature of about 25.degree. to 40.degree. F above the melting temperature of the vinylidene chloride polymer and then molded into a hollow container.

Abstract: Micron size polymer particles with narrow particle size distribution are prepared by dissolving the polymer in a suitable liquid solvent, impinging an atomized spray of the dissolved polymer on a moving film of a liquid in which the polymer is insoluble and then recovering the polymer particles from the resultant mixture of liquids.

Abstract: A rectangular tape seal end closure for closing pour openings in a round end panel of a pressurized container wherein the tape extends to the circular peripheral seaming chuck guide groove. The tape has a pull ring pull folded over the body of the tape and normally would form corners therewith which would encroach upon the chuck guide groove. In this invention, these corners are cut off to clear the chuck groove and novel ribbing reinforcements are provided which reinforce the body of the tape to resist blow-out and which bridge the cut off areas and function to strengthen the tape to counter notch-effect stress concentrations because of cutting off of the corners.

Abstract: An improved child resistant end closure wherein most of the pull tab for an easy opening end is mounted within a bead formed on the end panel which obstructs access to the ring or lift portion of the tab and pevents grasping and lifting it. The tab and/or the end panel are slightly bowed in such manner that the tab upon fastening by the rivet to the end panel is sprung toward the end panel so that the ring portion of the tab is biased toward the panel below the bead. The shape of the bead and the ring or grasping portion provides a digitally operable structure which permits an adult to insert his nail between the tab and external bead to lift the ring while flexing the end panel so that the ring may be further lifted to break free the tab hinge and then break the score defining the openable segment of the end panel, or alternatively the lift portion may be pried up by a tool entered into a slot provided beneath the ring.

Abstract: Improved easy open means for containers. Especially adapted to those used for liquids, including carbonated beverages, and permitting drinking from the container or pouring out contents. An important feature is attachment of closure to container after opening to avoid litter. Main feature is an openable segment in the top defined by a score line that extends almost all around its periphery, but interrupted at one point by an unscored section which provides integral hingeable attachment means to secure the segment to the top within the container after opening. Opening of the segment is accomplished by a manually operated elongated leverage lift tab which is hingeably secured to the top by a rivet which is positioned just outside of the segment and close to the score line. The outer longer lift end of the lift tab extends over the container top beyond the segment, and the shorter inner end extends partially over the segment, and comprises a downward pressure exerting extension.

Abstract: A simplified heavy-duty press having a bed and a support head mounted from the press bed for limited vertical movement under predetermined spring preload. The entire drive (less motor) and rams are carried from the press head and these components are movable away from the bed when the tools between the ram and bed encounter an obstruction beyond the preload. The preload limits maximum operative force that will be transmitted in the mechanisms where precise control of the components/dimensions may be difficult to maintain because of manufacturing limitations or because of thermal expansion.

Abstract: A propellantless aerosol container wherein an elastic expelling member is sleeved over a flexible product containing member and carried within a rigid container body. Retainers, releasable from without the container, are provided whereby the expelling member may be extended and retained in the extended condition during filling of the container, and later released to provide an expelling force.

Abstract: A hollow shirred casing stick is provided having the terminal pleats of one end thereof twisted into a cylindrical configuration which is implanted within said hollow stick to form an end closure. The end closure may be formed by twisting successive terminal pleats into the bore of the stick about a rotating mandrel advanced thereinto. A device is provided for forming the closure including a rotating and translating mandrel having retractable pickup means and gripping means, whereby a cylindrical closure may be formed thereabout, and the mandrel withdrawn, without disturbing the closure formed.

Abstract: A method and device for everting thin-walled flexible tubular casings or the like by passing a distal portion of the casing through a ring member, folding the casing back over the ring, grasping the free end of the casing, and displacing the ring relative to the fixed casing end, whereby the casing is drawn through and around the ring and is thereby everted.

Abstract: This invention relates to an improvement in a process for humidifying artificial sausage casings wherein a moisture-providing fluid is contacted with the inside wall of an unshirred portion of casing and the casing subsequently shirred. The improvement resides in employing as the moisture-providing fluid, water containing from about 0.5-5% by weight of a water-dispersible surfactant having sufficient lubricating qualities for preventing said casing from jamming on said shirring machine.

Abstract: This invention relates to an improvement in a process for preparing humidified, shirred artificial collagen sausage casings wherein immediately prior to shirring, the inside wall of the unshirred portion of the casing is contacted with an aqueous humidifying fluid comprised of water containing from about 0.8 to about 3% by weight of a mixture of partial fatty acid esters of glycerine and sorbitol, the glycerine ester being present in the aqueous fluid at a concentration of greater than 0.1% by weight.

Abstract: An easy opening end closure is arranged and adapted to accommodate pouring of products with varying viscosities. The end panel includes a number of portions disposed to obstruct displacement of the tab and thereby limit opening of the closure to a predetermined segment thereof. The portions are deflectable to a non-obstructing position by application of sufficient force thereagainst, enabling the user to determine the size of the pour opening by controlling the number of segments opened.

Abstract: An easy opening end closure is formed with annular, double folded band adjacent the chuck wall. A weakening line defining a removable panel portion is formed in the center segment of the fold so that the folded edges of the single band provide smooth protective surfaces on both the ledge and the removable panel portion.This disclosure also relates to a method for forming the above described easy-opening end closure wherein the weakening line is formed in the end panel prior to complete formation of the folded band.