Patents Assigned to Toyo Seikan Kaisha Limited
  • Patent number: 4261482
    Abstract: Disclosed is a squeeze vessel having a good combination of deformability, memory property and interlaminar peel resistance, suitable for squeezing out the content, and being excellent in content preserving property, flavor retaining property and appearance characteristics. This squeeze vessel comprises a laminate structure including at least one layer composed mainly of at least one member selected from the group consisting of ethylene-vinyl alcohol copolymers and polyamides, at least one layer composed mainly of an olefin resin having an elasticity of 900 to 9000 Kg/cm.sup.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: April 14, 1981
    Assignees: Toyo Seikan Kaisha Limited, Lion Hamigaki Kabushiki Kaisha
    Inventors: Muneki Yamada, Takesi Sugimoto, Jinichi Yazaki
  • Patent number: 4261473
    Abstract: A molded container having a wall composed of a thermoplastic resin oriented in at least one direction on the wall face, wherein the container wall has a layer of a blend composed mainly of a plurality of melt-extrudable thermoplastic resins, each of which has a solubility parameter (Sp) of at least 9.5, at least one of said thermoplastic resins has an oxygen permeability lower than 5.times.10.sup.-11 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg, said thermoplastic resins are chosen so that the difference (.DELTA.Sp) of the solubility parameter in said thermoplastic resins is not greater than 4.5, the elongation of said resin blend is higher than the arithmetic mean (.epsilon.) of elongations of the respective thermoplastic resins, and wherein the container has a thermal shrinkability (.delta.) of at least 5% in the orientation direction of said container wall.
    Type: Grant
    Filed: December 14, 1976
    Date of Patent: April 14, 1981
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Muneki Yamada, Sadao Hirata, Shunsaku Hirata, Akira Kishimoto, Fumio Kano, Jinichi Yazaki, Toru Suzuki
  • Patent number: 4255490
    Abstract: A copolymer comprising 10 to 50 mole % of olefin units and 90 to 50 mole % of vinyl units, 50 to 98 mole % of the vinyl units being vinyl alcohol units and 2 to 50 mole % of the vinyl units being vinyl acetal units, is disclosed. This copolymer has excellent resistance to hot water and excellent oxygen barrier property in combination. When this copolymer is subjected to retortsterilization, blanching is not caused and the excellent oxygen barrier property can be maintained. When this copolymer is laminated on a polyolefin or the like a laminate structure excellent in the interlaminar peel strength is provided.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: March 10, 1981
    Assignee: Toyo Seikan Kaisha Limited
    Inventor: Tadahiko Katsura
  • Patent number: 4225553
    Abstract: A thin sheet having a low rigidity is drawn while being depressed over the radiused corner of a die by elastic force or hydrostatic force to obtain a formed article whose sidewall part and flange part have no wrinkles. The force is applied through an elastic rubber provided around the punch and having an outside diameter larger than the inside diameter of the die cavity, or through an annular rigid body on which elastic pressure or fluid pressure is exerted. The hardness of the rubber is preferably approximately 70 to 85 in accordance with ASTM D 2240 Durometer A. A laminate not more than about 200 .mu.m in thickness and consisting of a thermoplastic resin film, aluminum foil and a heat-sealable resin film is drawn into a formed article or a container which is light in weight and suitable for containing foods, for instance.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: September 30, 1980
    Assignee: Toyo Seikan Kaisha, Limited
    Inventors: Kazumi Hirota, Kikuo Matsuoka
  • Patent number: 4217161
    Abstract: A transparent multi-layer container comprising a co-extrudate of an oxygen-barrier resin layer and an orienting resin layer which is monoaxially or biaxially oriented is disclosed. An adhesive resin layer is preferably interposed between the oxygen-barrier layer and the orienting resin layer, and this co-extrudate is drawn and molded at a specific temperature determined relatively to the melting points and softening points of the respective resins. This container is excellent in the combination of transparency, rigidity, mechanical strength, gas-barrier property and interlaminar peel strength.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: August 12, 1980
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Muneki Yamada, Sadao Hirata, Jinichi Yazaki, Yoshitsugu Maruhashi, Kozaburo Sakano, Akira Kishimoto, Shunsaku Hirata, Toru Suzuki, Fumio Kano
  • Patent number: 4213750
    Abstract: A rotary blow molding machine includes a rotor mounted on a horizontal driving shaft, a recovery hopper, an ejector mechanism, and mold stations mounted on the outer periphery of the rotor, which mold stations are radially disposed and circumferentially equally spaced, the mold stations each carrying thereon a split mold unit capable of opening and closing in the direction of the width of the outer peripheral surface of the rotor by a mold opening/closing mechanism, a mold clamping mechanism and a flash blow-pipe, the said split mold unit having a mold-release mechanism. It is so constructed as to produce blow moldings successively continuously at high speed and completely automatically during a single rotation of the mold stations on and along the same circular rotation track.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: July 22, 1980
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Kikuo Kubota, Yoshiaki Yamagishi, Masaru Yamaguchi
  • Patent number: 4212956
    Abstract: A copolymer comprising 10 to 50 mole % of olefin units and 90 to 50 mole % of vinyl units, 50 to 98 mole % of the vinyl units being vinyl alcohol units and 2 to 50 mole % of the vinyl units being vinyl acetal units, is disclosed. This copolymer has excellent resistance to hot water and excellent oxygen barrier property in combination. When this copolymer is subjected to retort-sterilization, blanching is not caused and the excellent oxygen barrier property can be maintained. When this copolymer is laminated on a polyolefin or the like, a laminate structure excellent in the interlaminar peel strength is provided.
    Type: Grant
    Filed: November 22, 1977
    Date of Patent: July 15, 1980
    Assignee: Toyo Seikan Kaisha Limited
    Inventor: Tadahiko Katsura
  • Patent number: 4189418
    Abstract: A can end sealing rubber composition(A) consisting essentially of a styrene-butadiene rubbery copolymer, a tackifier and a filler, and(B) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6,K=log J.sub.90.sup.C (10)-log J.sub.90.sup.C (1)wherein J.sub.90.sup.C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90.degree. C. by a parallel plate plastometer, and J.sub.90.sup.C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90.degree. C. by a parallel plate plastomer,and (2) a creep compliance J.sub.25.sup.C (1) of at least 3.times.10.sup.-9 cm.sup.2 /dyne but not exceeding 1.times.10.sup.-6 cm.sup.2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25.degree. C. by a parallel plate plastometer.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: February 19, 1980
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Hiroshi Ueno, Shunji Kojima, Masanori Aizawa, Akira Kishimoto
  • Patent number: 4182457
    Abstract: A transparent multi-layer container comprising a co-extrudate of an oxygen-barrier resin layer and an orienting resin layer which is monoaxially or biaxially oriented is disclosed. An adhesive resin layer is preferably interposed between the oxygen-barrier layer and the orienting resin layer, and this co-extrudate is drawn and molded at a specific temperature determined relatively to the melting points and softening points of the respective resins. This container is excellent in the combination of transparency, rigidity, mechanical strength, gas-barrier property and interlaminar peel strength.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: January 8, 1980
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Muneki Yamada, Sadao Hirata, Jinichi Yazaki, Yoshitsugu Maruhashi, Kozaburo Sakano, Akira Kishimoto, Shunsaku Hirata, Toru Suzuki, Fumio Kano
  • Patent number: 4101534
    Abstract: A metal-bonding adhesive composition consisting essentially of 95 - 60% by weight, based on the total composition, of an aliphatic homopolyamide and 5 - 40% by weight, based on the total composition, of an aliphatic copolyamide, said homopolyamide being a crystalline homopolyamide having up to 14 amide groups per 100 carbon atoms, and said copolyamide consisting of 90 - 70% by weight of (1) a polyamide having up to 14 amide groups per 100 carbon atoms and 10 - 30% by weight of (2) at least one polyamide whose recurring units are different from those of said polyamide (1), and a metallic can body composed of a metal blank, both side end portions of which are bonded by the side-lap-seam interposed by a layer of said adhesive composition.
    Type: Grant
    Filed: July 13, 1972
    Date of Patent: July 18, 1978
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Hiroshi Ueno, Shinya Otsuka, Tetsuo Tsukamoto, Akira Kishimoto
  • Patent number: 4082854
    Abstract: A packaging material having an improved gas permeation resistance, which comprises at least one layer composed of (A) an ethylene-vinyl alcohol copolymer having a vinyl alcohol content of 50 to 75 mole % and a residual vinyl ester content of up to 4 mole % based on the sum of the vinyl alcohol and vinyl ester or (B) a blend of said ethylene-vinyl alcohol copolymer with up to 150% by weight, based on said copolymer, of at least one thermoplastic polymer other than said copolymer, said ethylenevinyl alcohol copolymer having a main endothermic peak satisfying substantially the following requirement:Y.sub.1 = 1.64X + 68.0wherein Y.sub.1 stands for the main endothermic peak temperature (.degree. C.) in the differential thermal analysis, and X stands for the vinyl alcohol content (mole %) in the ethylene-vinyl alcohol copolymer,And at least one subsidary endothermic peak satisfying substantially the following requirement:0.67 X + 76.7 .gtoreq. Y.sub.2 .gtoreq. 0.40 X + 40.0preferably0.67 X + 76.7 .gtoreq. Y.sub.2 .
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: April 4, 1978
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Muneki Yamada, Sadao Hirata, Akira Kishimoto, Shunsaku Hirata, Toru Suzuki, Fumio Kano
  • Patent number: 4079850
    Abstract: In a multi-layer blow molded container having a joint portion at least in the bottom portion thereof, barrier characteristics to gases such as oxygen and water vapor and liquids such as water, solvents, aqueous ammonia and salt water and interlaminar strength characteristics such as interlaminar adhesion strength, peel strength and impact strength in the content-filled state can be highly improved by blow molding a parison of a laminate structure of two or more polymer layers in which the polymer composition is different with respect to the thickness direction of the container wall but substantially identical with respect to the plane direction and each of the polymer layers is continuous with respect to the plane direction, in such a manner that a tapered projection protruding outwardly in the thickness direction of the container wall is formed in the joint portion so that each of the polymer layers is substantially continuous in this joint portion.
    Type: Grant
    Filed: February 21, 1975
    Date of Patent: March 21, 1978
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Toru Suzuki, Shunsaku Hirata, Jinichi Yazaki, Shinichi Miyazaki, Shigezo Nohara
  • Patent number: 4070885
    Abstract: Stamping means in a single stroke initially passes upwardly through a pool of coating material to collect coating stuff on the face of the die element, then through a restricted opening formed integral with the coating material reservoir to remove excess coating stuff from the periphery of the die and finally into functional engagement with a substrate to simultaneously deform and coat the substrate.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: January 31, 1978
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Yasunori Miyamatsu, Hisakazu Yasumuro, Kenichi Miyata, Takashi Shimizu, Kikuo Matsuoka
  • Patent number: 4062997
    Abstract: An olefin resin-metal bonded structure having a desirable combination of high corrosion resistance and peel strength, which comprises a metal substrate and an olefin resin layer bonded together through a primer layer, said primer layer containing (A) an oxidized polyethylene having an oxygen content of 0.1 to 10% by weight, a saponification value of 2 to 200, a density of 0.90 to 1.2 and an average molecular weight of 1000 to 50000 and (B) a coating-forming base resin having a density higher by at least 0.1 than the oxidized polyethylene and containing a functional group selected from hydroxyl and carbonyl groups at a concentration of at least 1 meq/g, the mixing weight ratio of the oxidized polyethylene (A) and the base resin (B) being within the following range:(A) : (B) = from 0.2 : 99.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: December 13, 1977
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Hisashi Hotta, Fumio Mori
  • Patent number: 4039704
    Abstract: It is known to apply a sealant to the inner surface of opening portions of a can end so as to reinforce the opening portions and to prevent the leakage of the contents. Devices were invented previously in order to achieve this purpose, but the efficiency of production with these devices is extremely low. The number of cans processed by such conventional devices is limited to about 75 per minute at most, and it is extremely difficult to raise the productivity beyond the limit. Because the sealant used is of very high viscosity, it is not easy to take out a small portion of it and coat it on the inside surface of the can end, and the operation is also time-consuming.The present invention has succeeded in taking out a small predetermined amount of such a high viscosity sealant always onto a stamping die, and this markedly increases the efficiency of production. While the conventional production results in the processing of about 75 pieces per minute, the present invention can increase it to about 300 per minute.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: August 2, 1977
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Yasunori Miyamatsu, Hisakazu Yasumuro, Kenichi Miyata, Takashi Shimizu, Kikuo Matsuoka
  • Patent number: 4013001
    Abstract: In the case, where fruits, which are relatively soft and liable to be bruised upon contact or collide with other object such as particularly in the case of white peaches, are to be separated into flesh and pit automatically, means for assuring a high efficiency and a high yield is provided for separating and taking out flesh from the fruits without bruising the flesh as much as possible.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: March 22, 1977
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Sato Yasuhiro, Sato Toshio, Kawasaki Shuichi, Takaishi Toshio, Okuyama Sadao, Yamanashi Norio
  • Patent number: 3999494
    Abstract: A press-forming operation to form opening portions in can ends having a curled portion for seaming and an operation of applying a sealant on the opening portions have been coupled into an integrated system, thus allowing them to be performed consecutively. Can ends are supported at predetermined intervals by a can end-supporting disc so as to move them intermittently.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: December 28, 1976
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Yasunori Miyamatsu, Kikuo Kawamukai
  • Patent number: 3994651
    Abstract: While a series of hollow moulded articles interconnected by waste portions are successively moulded by a rotary moulding machine and are continuously conveyed by a pair of conveyors, the waste portions are removed from one end of each of the articles by applying a twisting force to the waste portions by means of cutter means. The waste portions are removed from the other end of each of the articles, and then such ends may be sealed.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: November 30, 1976
    Assignee: Toyo Seikan Kaisha Limited
    Inventor: Taketoshi Kamibayashi
  • Patent number: 3982376
    Abstract: A filling and sealing process and apparatus for retort foods, in which a plurality of retort pouches are treated at the same time. The retort pouches are gripped by a plurality of grippers fixedly connected to an endless transfer chain and fed through first, second, third, fourth, fifth, sixth, seventh and eighth stations. The endless transfer chain is arranged to be intermittently movable around the outer periphery of a platform mounted on a base. At the first station, a plurality of retort pouches are gripped by the grippers and opened and dilated at the second station. The opened retort pouches are fed to third station where a defectively opened retort pouch is sensed and released from the gripper. The retort pouches gripped by the grippers are fed to the fourth station, where solid food materials are introduced into the retort pouches. At the fifth station, the retort pouches are supplied with viscous liquid.
    Type: Grant
    Filed: June 27, 1975
    Date of Patent: September 28, 1976
    Assignee: Toyo Seikan Kaisha Limited
    Inventor: Masaomi Ikeda
  • Patent number: 3975463
    Abstract: A resinous composition excellent in processability and gas permeation resistance, which comprises (A) 30 to 98 % by weight of a crystalline polyolefin, (B) 2 to 70 % by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93 %, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of a thermoplastic polymer containing a carbonyl group in the main or side chain thereof, and a molded structure formed therefrom, which has a specific multi-layer structure and a high gas permeation resistance.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: August 17, 1976
    Assignee: Toyo Seikan Kaisha Limited
    Inventors: Sadao Hirata, Muneki Yamada, Akira Kishimoto