Abstract: Polyolefin containers having improved gas barrier properties are compression molded from billets formed from polyolefin resins filled with inorganic fillers. The gas barrier properties of the containers are stabilized against loss under conditions of sterilization by treating the fillers with a polar silane compound.
Abstract: A portion of the oil-in-water emulsion used as a lubricant/coolant in the shaping of metal articles such as containers is subjected to a reverse osmosis or ultrafiltration process to concentrate the oil portion and separate a water permeate. The oil concentrate is reincorporated in the remaining portion of the coolant and the permeate is used as rinse water to remove oil residues retained on the article from the metal shaping operation. The coolant is then reconstituted with the oil residue rinsed from the article.
Abstract: In the manufacture of fiber-reinforced cellulose casing wherein a paper tube is passed downwardly over a mandrel, impregnated with viscose and subjected to the action of a coagulating liquid to regenerate cellulose, a gas stream is flowed upwardly within the tube as the tube is passed over the mandrel, the gas stream pressure being sufficient to maintain the cylindrical dimensions of the tube but insufficient to cause a measurable change in the dimensions of the tube walls whereby contact of the internal surface of the impregnated tube with the mandrel is reduced or substantially eliminated.
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: To reduce the number of oversize sausage links created during linking of stuffed regenerated cellulosic casings, the casing, before stuffing, has applied to the external walls thereof an aqueous dispersion containing a material which imparts a low coefficient of friction to the casing.
Abstract: Stable dispersions of propylene polymer resins which can be fused to form smooth, uniform, pinhole-free coatings are prepared by admixing the resin in particulate form having a median diameter of 0.1-50 microns with an organic liquid having a boiling point above 300.degree. F. and a density approximately equal to the resin, the resin being insoluble and dispersible in the liquid at room temperature and soluble in the liquid at temperatures above 350.degree. F.
Abstract: Mineral fillers reactable with acids such as metal carbonates such as CaCO.sub.3 are rendered more compatible with polyolefin resins such as polyethylene by first reacting the filler with a long chain carboxylic acid to form a surface film of the acid. The acid reacted filler is contacted with a vinyl ester of the acid which is then polymerized in the presence of a free radical catalyst such as benzoyl peroxide to encapsulate the acid reacted filler in a coating of the polymerized ester.
Abstract: A non-detachable tab adapted to be secured to the end panel of a container which comprises a securing lug formed from the sheet metal of the tab, the lug having an attachment to the nose portion of the lug in an area which has not been work hardened and also which has been formed to provide several axes of hinging and thereby increasing the number of times that the tab can be hinged back and forth without breaking off.
Abstract: A sausage casing surface formed from regenerated cellulose is exposed to a source of surface activating energy to an extent sufficient to induce a change in the surface whereby the casing will adhere to a sausage emulsion encased therein and follow the shrinkage of the sausage during processing.
Abstract: A ring type calibrating cage for confining a metal container shell just prior to and during seam welding. The cage comprises a series of strategically located rings through which the can body is fed. These rings are of narrow width reducing friction drag and being optimally positioned to accurately hold the can body in cylindrical shape with overlapped edge portions particularly when these edge portions enter into the welding nip.
Abstract: An improved child resistant end closure wherein the pull tab for an easy opening end is mounted within a panel bead; the tab being fastened by the rivet to a tear-out portion of the end panel. The tear-out portion is adapted to be pulled outwardly about a hinge line which intersects the bead. The bead is reduced in depth at the intersection with the hinge line and formed to permit the bead to fold in such manner as to resist sudden flip-out of the tear-out portion which in the previous designs has caused splashing out of the contents in the container.
Abstract: This invention relates to an artificial sausage casing and a process for making the casing. In making a regenerated cellulose casing an oxazoline wax is incorporated into viscose in a proportion from about 1 - 20% by weight of the cellulose content in the viscose, the oxazoline impregnated viscose extruded into a tubular casing, coagulated, and the cellulose regenerated. The casing has excellent handle, flexibility, and peelability from sausages processed therein.
Abstract: This invention relates to an artificial sausage casing of regenerated cellulose having a coating composition applied over the internal surface thereof which exhibits excellent meat release from sausages processed therein under high speed mechanical peeling and has improved resistance to strand breakage and pinholing during shirring and meat processing, the coating being an admixture of a water-soluble cellulose ether, a partial fatty acid ester of sorbitan or mannitan and a water-soluble polyalkylene glycol ether having the formula RO(--C.sub.2 H.sub.4 O).sub.n --H wherein R represents long chain alkyl radicals having 8 to 16 carbon atoms and n is an integer from 4 to 40.
Abstract: A tab for an easy open end which comprises a rivet securing the tab intermediate its ends to the end panel, the tab having a nose end which is adapted to be pressed downwardly upon lifting of the opposite lift end of the tab against a tear-out portion of the end panel and to push the same inwardly. The invention is directed to forming the nose and the lift end of the tab in such manner that both ends of the tab are maintained in constant contact with the container end while it is attached intermediate its ends to the container end panel in order to prevent rocking of the tab and thus producing a fatigue failure in the scored area which is adjacent the tab.
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.