Abstract: A method is described for preventing buckling of beer-can tops and bottoms during pasteurization of the beer. Prior to the pasteurization, an anti-buckle ring is mated with each beer can such that the ring captures the base portion of the can's bottom. The ring permits the bottom's panel to bulge outwardly while preventing radial displacement of the bottom's base area and, hence, buckling of the can bottom, when the heat applied during pasteurization causes the internal pressure of the can to increase. To prevent buckle of the beer can's top, another anti-buckle ring may be mated with the top of the can such that the latter ring captures the double-seam area on the top of the can to prevent radial displacement at key points of the top. After pasteurization, both rings are automatically removed from the can for use with another can.

Abstract: Disclosed is a coating system for use in connection with a ferrous plate to be drawn into containers for packing sulphur bearing foods. More particularly, the coating system is capable of being drawn and includes aluminum and zinc oxide for purposes of uniform interior appearance and sacrificial protection respectively.

Abstract: The present invention pertains to a machine and method of adhering a can opening key to a container and the article formed by such method and machine. More specifically, this invention pertains to the taping of a can opening key to a can body wall by means of a continuous motion high speed machine for applying a polymeric film carrying an adhesive on a surface thereof.

Abstract: A new leavening acid composition is provided comprising a potassium modified 1:3:8 sodium aluminum phosphate, the calcium modified derivatives or mixtures thereof in combination with an alkali metal acid pyrophosphate such as sodium acid pyrophosphate. The leavening action of the combination in biscuits using a slow sodium acid pyrophosphate is slower than the action of either ingredient alone. The compositions are useful in leavening baked goods and especially refrigerated canned biscuits.

Abstract: A method is described for preventing buckling of beer-can tops during pasteurization of the beer. Prior to the pasteurization, an anti-buckle ring is mated with each beer can such that the ring captures the double-seamed top of the can. The ring prevents radial displacement at key points of the top and, hence, buckling of the top end of the can, when the heat applied during pasteurization causes the internal pressure of the can to increase. After pasteurization, the ring is automatically removed from the can for further use with another can.

Abstract: There is disclosed a metal container containing a beverage or food having its integral surface coated with an adherent sanitary liner, the coating being a cured layer of a water-based coating composition consisting essentially of from about 5 percent to about 60 percent by weight of an amine-neutralized or partially neutralized interpolymer formed in the presence of a vinyl polymerization catalyst and in the absence of mercaptan, the interpolymer being comprised of from about 10 percent to about 30 percent of acrylamide or methacrylamide in units of the structure: ##STR1## where R' is methyl or hydrogen and R is hydrogen or lower alkyl, from about 5 percent to about 15 percent of units formed by vinyl polymerization of monoethylenically unsaturated carboxylic acid; from about 10 percent to about 50 percent of units derived by vinyl polymerization of isobutyl methacrylate; and from about 20 percent to about 45 percent of nitrile, such as acrylonitrile; wherein the interpolymer is solubilized by neutralizing ac

Abstract: There is disclosed a metal container containing a beverage or food having its internal surface coated with an adherent sanitary liner, the coating being a cured layer of a water-based coating composition consisting essentially of from about 5 percent to about 60 percent by weight of an amine-neutralized or partially neutralized interpolymer formed in the presence of a vinyl polymerization catalyst and in the absence of mercaptan, the interpolymer being comprised of from about 10 percent to about 30 percent of acrylamide or methacrylamide in units of the structure: ##STR1## where R' is methyl or hydrogen and R is hydrogen or lower alkyl, from about 5 percent to about 15 percent of units formed by vinyl polymerization of monoethylenically unsaturated carboxylic acid; from about 10 percent to about 30 percent of units derived by vinyl polymerization of monovinyl aromatic monomer; from about 10 percent to about 30 percent of units formed by vinyl polymerization of flexibilizing monomer selected from lower alkyl a

Abstract: The interior side seam areas of tinplate can bodies exhibit improved resistance to corrosion by sulfur containing foods packaged therein when the side seam is soldered with a tin solder comprised of 0.1-0.5 percent by weight indium, 0.1-0.5 percent by weight bismuth, the remainder being tin.

Abstract: A bonded can having a high hot water resistance, which consists of a metal material having both the confronting side edges bonded together by a linear polyamide adhesive through an epoxy-phenolic resin undercoating composition, wherein said epoxy-phenolic resin undercoating composition comprises 50 to 95% by weight of an epoxy resin having a number average molecular weight of 800 to 5500, which is obtained by condensation of an epihalohydrin with bisphenol A, and 5 to 50% by weight of a resol-type phenol-aldehyde resin having a number average molecular weight of 200 to 1000, which is obtained by reacting a mixed phenol comprising 65 to 98% by weight of a dihydric phenol represented by the following general formula: ##STR1## wherein R stands for a bridging group or is a direct bond,and 2 to 35% by weight of a monohydric phenol, with an aldehyde in the presence of a basic catalyst.This bonded can can resist retort sterilization conducted at 122.degree. to 135.degree. C.

Abstract: Water-borne or aqueous coating compositions which are especially suitable for use as bondable base coats and size coats in three piece, tin-free steel beverage containers comprise blends of an aqueous dispersion of an amine solubilized interpolymer with aldehyde condensation resins. The interpolymer is prepared in the absence of mercaptans, external surfactants and external dispersion stabilizers and is formed from substituted carboxylic acid amide units; ethylenically unsaturated acid units; hardening units from monomers such as styrene, vinyl toluene or alkyl methacrylate having from 1 to 4 carbon atoms and flexibilizing units from certain alkyl acrylates or methacrylates. The interpolymers are solubilized by neutralizing or partially neutralizing the acid units of the interpolymer with monomeric amines. Aldehyde condensation resins, such as phenol aldehyde resins, aminoplast resins or mixtures thereof are especially desirable.

Abstract: A steel sheet for production of DrD or DI cans, comprising a cold rolled steel sheet, a solvent type thermosetting paint coating containing ethylene-vinyl acetate copolymer baked on the steel sheet in a completely cured state.

Abstract: Food products, such as vegetables, fruits, etc. are efficiently sterilized and/or cooked and canned under high vacuum by filling them into containers, e.g. conventional tin cans, in the presence of only a small amount of water; then securing lids non-sealingly to the open ends of the cans; then passing the cans over a high temperature heat source for direct flame or radiation heating, with their axes inclined, until the liquid collected in a bottom region of each can has come to a boil and the steam formed has driven the free air from the can; then sealing lids tight to the can bodies; then heating the cans to the desired temperature of sterilization and/or cooking and maintaining this temperature for a predetermined period of time; and finally cooling the cans, e.g. by a water spray, whereupon a vacuum of about 700 mm. (27 to 29 inches) of mercury is formed in each can by condensation of the steam therein.

Abstract: A resin is provided which is the adduct of a bisphenol and a diglycidyl ether of a bisphenol reacted with an anhydride to an Acid No. of 35 to 150. This resin is solubilized with a volatile amine, ammonia, or NH.sub.4 OH in a solvent mixture of water, alkoxyethanols, alcohols, and alkyl ethers of diethylene glycol and combined with an aminoplast to produce a coating composition utilizable to coat metal surfaces that will contact a food or beverage, such as in metal packaging containers.

Abstract: The invention relates to a novel method of preparing aqueous polymeric colloids comprising the steps of (a) polymerization in organic solvent at high concentration of the monomers (b) emulsification of the resultant polymer solution in water using small proportion of surfactant. The pH of the resulting emulsion is adjusted to 6.5 to 10 with amines. The structure of the polymers in the present invention is highly hydrophobic so that, even at full neutralization of the carboxylic acid groups with amines, it would not produce an aqueous solution. Furthermore, in the absence of surfactant, a stable colloidal emulsion cannot be attained.The aqueous coating composition has satisfactory performance as interior and/or exterior coating for food, beer, beverage and other metal containers. The emulsions can be easily applied by spraying or direct roller coating and baked to give films of outstanding properties.

Abstract: An aluminum container has an inner surface treated to suppress foaming of carbonated liquids subsequently placed therein by first chemically cleaning the aluminum surface, forming a conversion coating on the surface using a solution containing ions of phosphate, hexavalent chromium and fluoride; and treating the coated aluminum surface with an aqueous solution containing glycerol.

Abstract: By predetermined selection of tin coating weight in the manufacture of electrolytically tinplated continuous steel strip, cup formation of sheet metal blanks cut from such tinplated flat rolled steel with the selected tin coating weight disposed internally, selective reduction of sidewall gage and coating weight, maintenance of tin coating weight on the interior surface of the bottom wall, and selective organic coating, the present invention enables production of special container packs, previously limited to three-piece containers, from unitary seamless can bodies. Selected tin coating weight on the interior surface of the bottom wall of the can body is maintained throughout the manufacturing process and this surface is exposed to container contents. The sidewall interior surface of the can body is protected from exposure to container contents by an organic coating.

Abstract: A one-piece reusable closure for home canning. The closure is adapted for sealing home canning containers, such as "Mason Jars." The closure has a one-piece threaded cap with a bonded annular closed-cell foam gasket at the periphery of the central cover section positioned to seal against the jar lip. A central cover portion is dished outwardly and moves to an inwardly dished configuration when a partial vacuum is developed in the container. When the closure is unscrewed, the central cover section springs with an audible click to the outwardly dished configuration. The closure incorporates a stop mechanism to limit the extent of gasket compression by limiting the threaded engagement of the closure with the container. The mechanism can comprise either a deformed thread groove or a lower edge of the closure adapted to abut a flange on the container when the desired gasket compression is achieved. The compression of the gasket material against the lip of the container is thus limited to a predetermined degree.

Abstract: A one-piece reusable closure for home canning. The closure is adapted for sealing home canning containers, such as "Mason Jars." The closure has a one-piece threaded cap with a bonded annular closed-cell foam gasket at the periphery of a central cover section positioned to seal against the jar lip. The central cover portion is dished outwardly and moves to an inwardly dished configuration when a partial vacuum is developed in the container. When the closure is unscrewed, the central cover section springs with an audible click to the outwardly dished configuration. The closure incorporates a one-way pressure relief mechanism to limit the pressure in the container. The mechanism comprises a resilient sealing member overlying an orifice in the central cover section of the lid. As the container contents are heated, gas pressure in the container will increase and force the resilient sealing member from the orifice. Gases will then be vented through the orifice under the resilient sealing member.

Abstract: A structural multiple ply wall for a product container has an inner container sheet ply having a composition providing low product permeability through the ply for a product disposed adjacent to a first face of the ply. A fluid coating consisting of an aqueous solution of a reducing sulfite salt is disposed adjacent to the second face of the inner sheet ply, the coating actively reacting with oxygen gas from the adjacent atmosphere. At least one sheet exterior ply has one face of one of the exterior ply disposed adjacent to the fluid coating. The exterior ply can have a composition providing low oxygen permeability through the sheet exterior ply. The inner sheet ply, the liquid coating, and the sheet exterior ply are contiguously integrally disposed together forming the structural multiple ply wall. The wall is formed into a product container providing at least the major proportion of the container wall area. A method of manufacturing the multiple ply wall is taught.

Abstract: Rigid containers, such as metal cans, for use in hermetically packaging roasted coffee products are coated internally with an aroma solvent (e.g. glycerides, waxes, silicones, etc.) which is effective to dissolve and partition a broad range of aromatics. This effects an aroma partition between the headspace in the sealed, coffee-containing can and the coating which retards staling and/or oxidation of the coffee aroma within the sealed can. The pick-up of aroma by the coating may also increase the amount of aroma retention within the opened container during an extended in-use period.

Abstract: A coated steel plate suitable for bonding with a polyamide adhesive comprising a steel plate having coated thereon (a) a composition comprising a thermosetting phenol resin and a bisphenol A type epoxy resin, the thermosetting phenol resin comprising the condensation product obtained on reacting under refluxing a phenol and formaldehyde in less than one mol per equivalent of the phenolic hydroxyl group in the presence of an alkali catalyst; (b) a composition comprising a thermosetting phenol resin and a bisphenol A type epoxy resin, the thermosetting phenol resin comprising the condensation product obtained by washing with water the condensation product obtained by reacting under refluxing a phenol and formaldehyde in less than one mol per equivalent of the phenolic hydroxyl group in the presence of an alkali catalyst and then heating the condensation product to temperatures above about 60.degree.

Abstract: Water-based coating compositions for use as internal sanitary liners for metal containers containing beer, carbonated and noncarbonated soft drinks, and fruit juices consist essentially of aqueous dispersions of amine-solubilized interpolymers, said interpolymers being formed from substituted carboxylic acid amide units; ethylenically unsaturated acid units; hardening units from monomers such as styrene, vinyl toluene or alkyl methacrylates having from 1 to 4 carbon atoms and flexibilizing units from certain alkyl acrylates or methacrylates. The interpolymers are solubilized by neutralizing the acid units of the interpolymer with monomeric amines. In order to produce a stable composition, the amount of amine utilized in neutralizing the acid groups of the interpolymer should be sufficient to produce at least 0.200 milliequivalents of salt per gram of resin solids.

Abstract: Azo colorants, when employed in polymeric form, present substantially reduced corrosivity to metals.

Abstract: Metal surfaces are coated with an aqueous dispersion containing a water dispersible carboxylic acid containing resin and aliphatic polyamine.

Abstract: An improved container featuring an aluminum end or panel having a tear open portion defined by score lines provided in an aluminum composite having a core composed of an aluminum alloy consisting essentially of 1 to 7% of one or more elements selected of the group of up to 3% copper, up to 4% magnesium and up to 1.5% manganese, the balance essentially aluminum and an aluminum cladding layer consisting of aluminum and, optionally, some amount of zinc but less than 1% with the cladding facing the contents of the container. The solution potential of the core and cladding are controlled in order to achieve the desired protection. A thermal treatment can be employed to control the electrochemical performance of certain composites.

Abstract: Flavor modifying compositions which alter or enhance naturally occurring substances are prepared by reacting a sulfur-containing compound with an alpha-hydroxy- or an alpha,beta-epoxy-substituted carbonyl compound.