Patents by Inventor Kazuo Taira
Kazuo Taira has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5744205Abstract: A package and a method are disclosed for preserving freshness of produce using a corrugated fiberboard composed of an outer liner having a carbon dioxide permeability coefficient Pco.sub.2 of greater than 5.times.10.sup.-10 cm.sup.3 (STP)cm/cm.sup.2 .multidot.s.multidot.cmHg at a temperature of 27.degree. C.; a corrugating medium; and an inner liner having a water-vapor transmission rate of less than 100 g/m.sup.2 .multidot.day at a temperature of 27.degree. C. The end parts of the corrugated fiber board which are exposed to an outer surface of the package are substantially sealed with a seal tape. A wrapping paper covered at least on one surface thereof with a resin layer which contains therein less than 0.917 g/cm.sup.3 density of a copolymer of ethylene and .alpha.-olefin having a carbon number of 3 to 12, having a carbon dioxide permeability coefficient of greater than 8.times.10.sup.-10 cm.sup.3 (STP)cm/cm.sup.2 .multidot.s.multidot.cmHg, a permeability coefficient ratio Pco.sub.2 /Po.sub.Type: GrantFiled: June 7, 1995Date of Patent: April 28, 1998Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Yoshitake Kawai, Kazuo Taira, Kanemichi Yamaguchi
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Patent number: 5721028Abstract: The present invention provides a strong heat seal to a thermoplastic polyester container which can withstand hot water treatment such as retorting, and to a heat sealed container. A heat-sealable closure is also provided. It is composed of a laminate consisting of a heat-seal layer comprising as a main component a copolymerized polyester resin having a softening temperature of 120.degree. C. and a glass-transition temperature of 30.degree. to 85.degree. C., a metal substrate, and an epoxy-phenol resin primer layer interposed between them.Preferably, the container has a heat seal portion composed of a thermoplastic polyester having a fusion temperature in the crystalline state of at least 200.degree. C. This polyester portion is oriented and crystallized or heat-crystallized.Type: GrantFiled: January 5, 1993Date of Patent: February 24, 1998Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kouji Suzuki, Tsuneo Imatani, Hideo Kurashima, Kazuo Taira
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Patent number: 5527616Abstract: A laminate for flexible packaging and a process for preparing the same. The laminate for flexible packaging is obtained by joining a plurality of flexible blanks via layers of an adhesive agent, wherein the layers of said adhesive agent are layers of an isocyanate-terminated polyurethane type hot-melt resin that is crosslinked with the moisture, the residual amount of an organic solvent in said laminate is 10 .mu.g/m.sup.2 or smaller per a unit inner surface, the peeling strength at 25.degree. C. is 250 g/15 mm of width or greater, and a peeling strength retentivity at 80.degree. C. is 30% or greater of the peeling strength at 25.degree. C.Type: GrantFiled: February 9, 1994Date of Patent: June 18, 1996Assignee: Toyo Seikan Kaisha Ltd.Inventors: Yasushi Hatano, Kazuo Taira, Makoto Yoshida, Hideo Tosaki
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Patent number: 5204181Abstract: The present invention provides a strong heat seal to a thermoplastic polyester container which can withstand hot water treatment such as retorting, and to a heat sealed container. A heat-sealable closure is also provided. It is composed of a laminate consisting of a heat-seal layer comprising as a main component a copolymerized polyester resin having a softening temperature of 120.degree. C. and a glass-transition temperature of 30.degree. to 85.degree. C., a metal substrate, and an epoxy-phenol resin primer layer interposed between them.Preferably, the container has a heat seal portion composed of a thermoplastic polyester having a fusion temperature in the crystalline state of at least 200.degree. C. This polyester portion is oriented and crystallized or heat-crystallized.Type: GrantFiled: June 12, 1990Date of Patent: April 20, 1993Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kouji Suzuki, Tsuneo Imatani, Hideo Kurashima, Kazuo Taira
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Patent number: 5131556Abstract: The present invention relates to an easy-open vessel lid which is composed of a laminate of a metal foil and a resin and has opening weakened line. A reinforcing layer of a thermoplastic resin is formed independently from the resin of the laminate at least on the outer peripheral side of a part most protruding in the opening-initiating direction of an inside introducing weakened line to cover said weakened line astride of said weakened line. By this reinforcing layer, ribbon breaking can be effectively prevented, and opening by shearing of the lid member along the weakened lines can be performed assuredly and smoothly.Type: GrantFiled: February 28, 1990Date of Patent: July 21, 1992Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Toshiaki Iioka, Yasuo Kaga, Hideo Kurashima, Kazuo Taira, Yasushi Hatano
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Patent number: 5116651Abstract: A sealed vessel is formed by heat-sealing a lid to a flanged vessel proper while forming a coating of a composition prepared by dispersing a small amount of an acid-modified olefin resin in a thermosetting resin on one of the faces to be heat-sealed and forming an olefin resin layer on the other face to be heat-sealed. The heat-sealed portion of this vessel has excellent heat resistance and excellent pressure resistance, and opening in the heat-sealed faces can be easily accomplished by hands.Type: GrantFiled: March 16, 1990Date of Patent: May 26, 1992Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Tadahiko Katsura, Kikuo Matsuoka, Kazuo Miyake, Kazuo Taira, Yoshiki Watanabe, Hiroshi Ueno
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Patent number: 4915289Abstract: A container composed of a plurality of container materials the opposing parts of which are sealed by heat sealing, wherein at least an opening start part of the sealed portion is of a laminated structure consisting of the plurality of container materials and an intermediate material inserted therebetween. The intermediate material and one of the container materials are tightly sealed, and the intermediate material and another of the container materials are sealed easily peelably. The inside end edge of the easily peelable seal portion is positioned more toward the center of the container than the inside end edge of the tight seal portion. At an opening start position, the outside end edge of the easily peelable seal portion is positioned more toward the center of the container than the outside end edge of the tight seal portion, and the intermediate material is provided so as to jut outwwardly of a heat sealing flat portion of a container flange.Type: GrantFiled: March 8, 1989Date of Patent: April 10, 1990Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Yasushi Hatano, Tamio Fujiwara, Michio Watanabe, Hideo Kurashima, Kazuo Taira, Kazuma Kuse
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Patent number: 4863063Abstract: A metal vessel has a metal bottomed cup-shaped lower member and a metal cup-shaped upper member, the upper and lower members being bonded together by a circumferential side seam. The upper member has a pouring mouth having a small diameter in the central portion thereof. The metal vessel is formed by lap-bonding the circumferential open ends of both the upper and lower members. The side wall of the upper member is formed by subjecting a primer-coated tin-plated steel sheet to draw forming at a side wall plastic forming ratio R of from 1.1 to 1.8; the side wall plastic forming ratio R being defined by the following formula: ##EQU1## wherein W stands for the weight (g) of the blank of the upper member, t stands for the thickness (cm) of the blank of the upper member at the side wall, .rho. stands for the density (g/cm.sup.3) of the blank of the upper member, D.sub.0 stands for the inner diameter (cm) of pouring mouth of the upper member, and D.sub.1 stands for the average inner diameter (cm) of the side wall.Type: GrantFiled: July 9, 1985Date of Patent: September 5, 1989Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Katsuhiro Imazu, Makoto Horiguchi, Hiroshi Matsubayashi, Seishichi Kobayashi, Kazuo Taira, Hiroshi Ueno
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Patent number: 4858782Abstract: Disclosed is a metal vessel comprising upper and lower members, each of which consists of a seamless molded metal cup having a protecting resin cover layer, the open end portions of the upper and lower members being lap-bonded to each other through an adhesive to form a circumferential side seam, said metal vessel being characterized in that the open end portion defining the inner side of the circumferential side seam has a layer of a thermoplastic resin adhesive tape heat-bonded along the entire circumference of said end portion while wrapping the end edge and adjoining inner and outer side faces therein, a layer located on the outer side face of the adhesive tape is extended along the lap-bonded portion, and the adhesive layer present in the lap-bonded portion satisfies the following requirement: ##EQU1## wherein S1 stands for the sectional area (mm.sup.2) of the adhesive layer present in the lap-bonded portion, lo stands for the width (mm) of the lap-bonded portion, and t.sub.Type: GrantFiled: April 25, 1985Date of Patent: August 22, 1989Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Hisakazu Yasumuro, Michio Watanabe, Kazuo Taira, Tsuneo Imatani, Hideo Kurashima
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Patent number: 4773558Abstract: An easily openable closure adapted to be fixed to a can body by seaming. The closure comprises a closure body of a rigid metallic material, a score formed therein reaching halfways in the thickness direction of the metallic closure body for defining a portion to be opened, and an opening tab provided near a score shearing starting point through a bonding support. The bonding support is comprised of a polyamide-type adhesive containing 6.1 to 15.0 main-chain carbon atoms on an average per amide group and having a crystallinity of 15 to 40% and a dynamic modulus, determined at a temperature of 25.degree. C. and a relative humidity of not more than 30%, of 0.8.times.10.sup.10 to 3.3.times.10 .sup.10 dynes/cm.sup.2.Type: GrantFiled: February 25, 1987Date of Patent: September 27, 1988Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kazuo Taira, Naoto Watanabe, Hiroshi Matsubayashi, Hiroshi Ueno
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Patent number: 4762245Abstract: A score line defining a portion to be opened is formed on a chromated surface treated steel plate coated with an epoxy type primer so that the score line is cut to the middle of the steel plate in the thickness direction thereof, and an opening tab is bonded and secured to the portion to be opened of the steel plate through a bonding fulcrum composed of a thermoplastic adhesive consisting of amide recurring units and/or ester recurring units so that the push-tearing top end of the opening tab is located on the score line.Type: GrantFiled: March 18, 1987Date of Patent: August 9, 1988Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Hiroshi Matsubayashi, Naoto Watanabe, Seishichi Kobayashi, Toshio Sue, Kazuo Taira
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Patent number: 4735835Abstract: Disclosed is a welded can having at least the inner face side of a weld seam covered with a composite film of a thermoplastic resin, wherein the thermoplastic resin composite film comprises (I) an innermost layer, located on the inner face side of the can, of a thermoplastic polyester having a molecularly oriented crystal and comprising a dibasic acid component content of at least 90 mole % of terephthalic acid and a diol component containing at least 90 mole % of ethylene glycol, said innermost layer (I) overlayer (II) a seam-contacting layer, located on the seam side, of a thermoplastic copolyester containing in the chain molecule a dibasic acid component containing 40 to 95 mole % of terephthalic acid and 0 to 40 mole % of isophthalic acid and a diol component containing ethylene glycol and butane diol in a total amount of 65 to 100 mole % at a molar ratio of from 5/95 and 80/20 or a blend of such copolyesters, and the composite film comprising the layers (I) and (II) has an elasticity modulus of 5 to 220Type: GrantFiled: September 2, 1986Date of Patent: April 5, 1988Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kazuo Taira, Sachiko Ishikawa, Hisakazu Yasumuro, Kenji Matsuno, Hiroshi Matsubayashi
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Patent number: 4685989Abstract: A process and an apparatus for producing a welded can body having an organic coated welded part are provided in which the exposed metal portion on the inside of the welded part of the can body and its vicinity is covered with a tape of an organic resin alone or a mixture of an organic resin with an inorganic material such as a pigment, a metal, etc. The resin tape is entirely supported by a mandrel to be disposed inside the can body, and pressed against the inside surface of the welded part and its vicinity. By heating the welded part of the can body, the resin tape is heated during pressing.Type: GrantFiled: September 24, 1985Date of Patent: August 11, 1987Assignee: Toyo Seikan Kaisha LimitedInventors: Kenji Matsuno, Hisakazu Yasumuro, Kazuo Taira, Tsuneo Imatani, Makoto Toyoshima
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Patent number: 4683263Abstract: Disclosed is a metal vessel comprising an upper member and a lower member, each consisting of a coated cup-shaped formed metal body and a circumferential side seam being formed by lap-bonding the open ends of the upper and lower members to each other through an adhesive, wherein said coated cup-shaped formed metal body is composed of a metal blank having a coating of a vinyl chloride resin having a vinyl chloride unit content of 30 to 97% by weight and a glass transition temperature of at least 40.degree. C.Type: GrantFiled: May 7, 1985Date of Patent: July 28, 1987Assignee: Toyo Seikan Kaisha Ltd.Inventors: Kazuo Taira, Akihiko Morofuji, Seishichi Kobayashi, Hiroshi Ueno
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Patent number: 4564541Abstract: Disclosed is a laminate structure comprising a layer of a creep-resistant resin composed mainly of ester recurring units and a gas barrier layer containing an olefin-vinyl alcohol copolymer, which are laminated through a thermoplastic resin adhesive layer, wherein the adhesive resin is composed of a copolyester or copolyester composition comprising in the main chain at least two acid components selected from (i) an isophthalic acid component, (ii) a terephthalic acid component and (iii) a linear or cyclic aliphatic dibasic acid component.Type: GrantFiled: February 7, 1984Date of Patent: January 14, 1986Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kazuo Taira, Akira Sakamoto, Muneki Yamada, Masanori Aizawa, Hiroshi Ueno
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Patent number: 4556151Abstract: Disclosed is a metal vessel comprising an upper member and a lower member, each consisting of a coated cup-shaped formed metal body and a circumferential side seam being formed by lap-bonding the open ends of the upper and lower members to each other through an adhesive, wherein said coated cup-shaped formed metal body is composed of a metal blank having a coating of a vinyl chloride resin having a vinyl chloride unit content of 30 to 97% by weight and a glass transition temperature of at least 40.degree. C.Type: GrantFiled: October 21, 1983Date of Patent: December 3, 1985Assignee: Toyo Seikan Kaisha Ltd.Inventors: Kazuo Taira, Akihiko Morofuji, Seishichi Kobayashi, Hiroshi Ueno
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Patent number: 4541546Abstract: Disclosed is a draw-ironed metal vessel having a circumferential side seam, which is formed by lap-bonding of open end portions of upper and lower members, each consisting of a seamless molded metal cap, wherein the side wall of at least one of said upper and lower members is formed by draw-ironing a tin-plated steel plate at an ironing ratio of at least 20% and a spout having a diameter smaller than that of the side wall of the vessel is formed on the top wall of the upper member.Type: GrantFiled: January 3, 1985Date of Patent: September 17, 1985Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Katsuhiro Imazu, Hiroshi Matsubayashi, Makoto Horiguchi, Kazuo Taira, Seishichi Kobayashi, Hiroshi Ueno
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Patent number: 4508481Abstract: Disclosed is a process for preparation of metal vessels, which comprises lap-bonding circumferential open end portions of outer and inner members, each consisting of a formed seamless metal cup, to each other through an adhesive, said process being characterized by fitting both the outer and inner members to each other through an adhesive layer interposed between the open end portions of both the members, heating the fitted portions of both the outer and inner members so as to melt the adhesive layer, and cooling the fitted portions so that the temperatures of the fitted portions of both the outer and inner members are substantially equal to each other just before solidification of the adhesive layer and the adhesive is filled between both the open end portions.Type: GrantFiled: September 28, 1982Date of Patent: April 2, 1985Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kazuhisa Ishibashi, Hideo Kurashima, Hisakazu Yasumuro, Michio Watanabe, Tsuneo Imatani, Kazuo Taira, Seishichi Kobayashi, Hiroshi Ueno
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Patent number: 4500575Abstract: Disclosed is a hot-melt adhesive which comprises a copolyester of a dibasic acid component comprising 70 to 97 mole % of terephthalic acid and other dibasic acid with a polyhydric alcohol component comprising 70 to 97 mole % of 1,4-butane-diol, 3 to 30 mole % of diethylene glycol and up to 20 mole % of other polyhydric alcohol having 2 to 5 carbon atoms, said copolyester having a reduced viscosity of at least 0.6 dl/g as measured at a temperature of 30.degree. C. in a phenol/tetrachloroethane mixed solvent having a phenol/tetrachloroethane weight ratio of 60/40 at a polymer concentration of 0.25 g/100 ml, a glass transition temperature of at least 31.degree. C. and a crystallinity of 15 to 40 %.This hot-melt adhesive is excellent in the operation adaptability, and in the form of a film, the adhesive has an appropriate rigidity and a good dimension stability.Type: GrantFiled: October 18, 1983Date of Patent: February 19, 1985Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Kazuo Taira, Akihiko Morofuji, Hiroshi Ueno, Seishichi Kobayashi
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Patent number: 4477501Abstract: Disclosed is a coated welded can having a metal-exposed face inclusive of a seam covered with a coating, wherein the coating comprises at least one organic resin coating layer and at least one metal film, and at least the portion of the organic resin coating that adheres to the metal-exposed face is comprised of a copolymer of ethylene with a carbonyl group-containing, ethylenically unsaturated monomer or a blend containing this copolymer.In this coated welded can, the adhesion of the coating, the corrosion resistance of the seam and the appearance characteristics of the seam are highly improved. Furthermore, the coating of this welded can is not damaged by such processing as flanging, beading or double-seaming or when the welded can is subjected to the retort sterilization.Type: GrantFiled: November 19, 1982Date of Patent: October 16, 1984Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Shunji Kojima, Tadahiko Katsura, Hiroshi Ueno, Kazuo Taira, Tsuneo Imatani