Abstract: This disclosure relates to the bottom profile on a one gallon metal paint can and more particularly to the specific concentric circular re-enforcing bends and beads applied to profile the bottom. In order to increase the static and dynamic strength of the bottom, the selection and position of re-enforcement is essential to maximize resistance to dynamic loadings and static load.

Abstract: A novel composition of matter having surprising physical properties when fabricated into multiple layer films is disclosed. The composition is generally a blend of nylon 6 with a nylon copolymer comprised of nylon 6 and a second nylon polymer. The second nylon polymer is 2.5 to 10 mole percent of the overall composition. The remaining 97.5% to 90% of the composition is the nylon 6 and the nylon 6 component of the copolymer. The nylon composition may be comprised entirely of a nylon copolymer having 90% to 97.5% nylon 6 and 10% to 2.5% of a second nylon polymer. The multiple layer films fabricated with the nylon compositions show unexpected range of thermoforming and heat sealing capabilities and good heat resistance, similar to that of nylon 6.

Abstract: A method is provided for obtaining an acceptable configuration of a thermally processed plastic container packed with food. Improvement in container configuration is attained by proper container design and by maintaining proper headspace of gases in the container during thermal processing and/or by controlled reforming of the bottom wall of the container. Further improvements are attained by controlling the thermal history of the empty container, such as by pre-shrinking the container before it is filled with food and sealed.

Abstract: A multiple layer sheet structure has oriented layers of nylon and EVOH. Additional layers may or may not be utilized, and may or may not be oriented. Where additional layers are used, one of the additional layers, on the exterior surface of the structure, is preferably heat sealable. The structure shows improved impact resistance, after retort processing, over similar structures not having oriented nylon and EVOH layers. In certain embodiments, retort processed pouches made from the packaging structures have improved stress crack resistance when dropped onto a hard surface.

Abstract: A lubricant is provided to help in drawing containers such as cans from tinplate or coated tin free steel and to assist the metal forming process during drawing. The lubricant is formulated to permit a post spray without removal of the lubricant thereby eliminating washing and drying the container before post spraying. Post spray coatings are solvent or water based and are necessary to protect the container from the harmful effects of the material carried within the container and in turn to prevent contamination of the product by its container. A method of lubricating a metal to be deeply drawn into a sanitary can is explained and includes leaving the lubricant on the can during interior post coating operations.

Abstract: Apparatus for marking continuously moving objects, wherein the marking device is caused to move during the marking process. The marking device may comprise a die guided to enable its movement with the object to a determined displacement, or, alternatively, the die may be externally controlled to move, through a given displacement, at the speed of the object.

Abstract: A plastic laminate sheet for making collapsible dispensing container comprises an outer layer of filled-plastic made of polypropylene or a blend of polypropylene, and high density polyethylene, and a filler, preferably calcium carbonate, incorporated therein. The outer filled-plastic layer is coextensively bonded to an inner layer of high density polyethylene to form the laminate sheet. An intermediate layer of an oxygen barrier plastic may be interposed in the laminate sheet in order to impart oxygen impermeability thereto.

Abstract: A novel coextruded plastic film has as an adhesive layer between polypropylene and nylon layers, a blend of polypropylene and a graft copolymer of maleic anhydride onto a polypropylene backbone, the graft copolymer having been produced in a reaction carried out at a temperature of from about 80.degree. C. up to about 10.degree. C. below the melting point of the polypropylene.

Abstract: The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, while at the same time providing excellent barriers to transmission of oxygen and moisture. Certain embodiments provide for improved abuse resistance, excellent graphics, and other improvements. The method of opening the package depends on separating opposing ones of the package sidewalls, forcing the opening tear to be propagated partially through the film to a peelable layer interface, with subsequent ply separation along the interface to effect completion of opening of the package.

Abstract: Molecularly oriented plastic films have five molecularly oriented layers. A first layer provides a barrier to gaseous transmission through the film and has a composition of 0% to 50% nylon or nylon copolymer, and conversely 50% to 100% ethylene vinyl alcohol. Second and third adhesive layers are adhered to the surfaces of the first layer, and have compositions comprising olefinic polymers, or copolymers, or blends thereof, the compositions having carboxyl modifications therein. Fourth and fifth layers are adhered to the second and third layers on the respective surfaces opposite the first layer. The fourth and fifth layers comprise 40% to 100% ethylene vinyl acetate and 0% to 60% linear low density polyethylene. Also disclosed are processes for making the oriented five layer films.

Abstract: A highly desirable blend has ethylene vinyl alcohol copolymer blended with a thermoplastic polymer composition. Preferred blends are compatible when the blend is formed into a film and oriented. The invention contemplates the blend composition, the blend composition incorporated into a film, an oriented film, a multiple layer oriented film, a method of making the film, and the film formed into a shrink bag.

Abstract: A collapsible dispensing tube has a multi-layer sheet material sealed over its dispensing orifice to provide a hermetically sealed tube. The multi-layer sealant sheet comprises two layers of metal foil separated by a polymer layer firmly adhered to the metal foil layers. A polymeric layer is adhered to the outer surface of one of the metal foil layers and serves to seal the tube orifice. The laminated sheet may be sealed across the orifice by the application of radio-frequency energy.

Abstract: A three layer heat shrinkable film is disclosed, along with preferred process for making it. The film comprises a first heat sealable layer of an ionomer, a second layer of a vinylidene chloride copolymer, and a third layer of a blend of an ionomer and an EVA copolymer. The EVA content is no greater than 20% of the blend by weight, and the vinyl acetate content is at least 4.5% of the blend by weight. In the preferred process, a three layer tape is coextruded and cooled, and reheated to 197.degree.-203.degree. F., and oriented in a conventional double bubble process.

Abstract: A novel coextruded plastic film has, as an adhesive layer between polypropylene and nylon layers, a blend of polypropylene and a graft copolymer of maleic anhydride onto an olefin polymer or copolymer, the adhesive blend containing from about 0.005% to 0.75% maleic anhydride based on the total weight of the entire blend composition.

Abstract: Off-flavor development is alleviated, or substantially minimized, in thermally processed comestibles packed in plastic containers. The container wall which is in contact with the comestibles is made of a polymer (e.g., polyethylene) containing low vinyl group concentration and low carbonyl group content after melt processing.

Abstract: This invention relates in general to new and useful improvements to easy opening container ends. More particularly, it relates to a new improved method of forming a hinged connection between a tab and an end panel.

Abstract: Apparatus for making a rigid container by injection molding a parison having plural layers of polymers. The parison is blow molded to the final shape of the container. Control during injection is exercised over each of the plural polymers so as to produce uninterrupted layers extending throughout the walls of the parison and to insure that the interior layers are completely encapsulated within the outer layers.

Abstract: A laminate web, suitable for conversion into a container for degenerative products, is produced from aluminum foil and an extrusion coating of an ethylene/acrylic acid-type copolymer, utilizing a polyacrylic acid chromium complex primer to enhance the bond at the interface. The laminate web will usually be formed into a tube with the copolymer disposed on the product side, which can advantageously be used to package fluoride toothpaste, and the like.

Abstract: A system and apparatus for roll forming to neck-in D&I cans ends and replace double necks and triple necks is disclosed. An externally disposed free roll is moved inward and axially against the outside wall of the open end of a trimmed can. A spring loaded interior support roller moves under the forming force of the free roll. This is a single operation where the can rotates and the free roll rotates such that a smooth conical necked end and flange are produced.