Patents by Inventor Akira Igarashi

Akira Igarashi 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).

  • Patent number: 4847593
    Abstract: A transmission circuit is disposed in at least one of a control panel and a plurality of terminal devices of a fire protection/security system, wherein the control panel individually polls the terminal devices to read in terminal information from the terminal devices, to judge and/or display the information, or to control the terminal devices. The transmission circuit includes a signal sending device for sending a signal to a signal line, a memory device for storing a signal to be sent to the signal line, and a coincidence decision device for deciding a coincidence between the signal sent from the signal sending device and the signal stored in the memory device.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: July 11, 1989
    Assignee: Nohmi Bosai Kagyo Kabushiki Kaisha
    Inventor: Akira Igarashi
  • Patent number: 4847236
    Abstract: A recording material is described capable of color formation by the contact of a colorless electron donating dye with an electron accepting compound, wherein the recording material contains a compound represented by formula (I) or (II)Ar.sub.1 XC.sub.n H.sub.2n YC.sub.m H.sub.2m ZAr.sub.2 (I)wherein Ar.sub.1 and Ar.sub.2 each represents an aromatic ring which may contain an oxygen atom or a sulfur atom: Z represents a divalent group selected from the group consisting of --CO-- and --O--; X represents a divalent group selected from the group consisting of --O-- and --S--, and Y represents a divalent group selected from the group consisting of --O--, --S-- and --CO.sub.2 --, provided that Z is --CO--, or X represents a divalent group of --O-- and Y represents a divalent group selected from the group consisting of --CO.sub.2 --, --SO.sub.2 -- and --SO--, provided that Z is --O--; and n and m each represents an integer of from 1 to 6,Ar.sub.1 XC.sub.n H.sub.2n YC.sub.m H.sub.2m YC.sub.n H.sub.2n XAr.sub.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: July 11, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Satomura, Ken Iwakura, Akira Igarashi
  • Patent number: 4833118
    Abstract: A heat-sensitive recording material is disclosed, comprising a support having thereon a subbing layer made of a pigment and a binder as main components and a heat-sensitive color forming layer comprising a color former, a color developer and a heat-fusible substance, which is positioned over the subbing layer, wherein the subbing layer contains an aryl ester derivative or aryl carbonate derivative, having a melting point of 75.degree. C. or above.The heat-sensitive recording material is excellent in dot reproducibility.
    Type: Grant
    Filed: March 9, 1988
    Date of Patent: May 23, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kawakami, Akira Igarashi, Ken Iwakura
  • Patent number: 4833121
    Abstract: A heat-sensitive recording material comprising a support having provided thereon a heat-sensitive color forming layer containing a colorless or slightly colored electron donating dye precursor and an electron accepting compound capable of forming color by the reaction with the electron donating dye precursor, wherein the heat-sensitive color forming layer contain modified polyvinyl alcohol having a hydrophobic group including a hydrocarbon residual group having 4 or more carbon atoms in the molecule.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: May 23, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenji Ikeda, Akira Igarashi
  • Patent number: 4822771
    Abstract: A heat-sensitive recording material comprising a support provided thereon a heat-sensitive recording layer containing a colorless electron donating dye precursor and an electron accepting compound, wherein calcium carbonate including calcium hydroxide in an amount of from 1 to 5 wt % is incorporated into at least one of said heat-sensitive layer and an intermediate layer provided between said heat-sensitive layer and said support.
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: April 18, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Akira Igarashi
  • Patent number: 4814231
    Abstract: A thermoplastic resin-silicone composite shaped article comprising (a) a shaped article of a thermoplastic resin selected from the group consisting of olefin resins, urethane resins and styrene resins and (b) a cured layer of an addition polymerization type silicone composition adhering to the one or both surfaces of the shaped article of a thermoplastic resin. To the surface of the above shaped article of a thermoplastic resin to which the above cured layer of an addition polymerization type silicone composition does not adhere, there may adhere another cured layer of the above addition polymerization type silicone composition. To either or both of these cured layers, there may further adhere a layer of the above thermoplastic resin, other thermoplastic resin, a silicone rubber, a silicone resin, glass, ceramics or a metal.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: March 21, 1989
    Assignees: Sumitomo Bakelite Company Limited, Fuji Systems Corp.
    Inventors: Masayuki Onohara, Kenji Kawai, Masaru Shibata, Akira Igarashi, Nobuhisa Kawaguchi
  • Patent number: 4797384
    Abstract: A heat-sensitive recording sheet is disclosed, comprising a paper support and a heat-sensitive color forming layer provided on one side of the paper support and an antistatic layer provided on the other side of the paper support, wherein the antistatic layer containing at least one polymer of homopolymers and copolymers of vinyl compounds having a sulfonic acid group, having a weight-average molecular weight of at least 5,000 and at least one surfactant selected from sulfosuccinates, alkylbenezenesulfonic acid salts and naphthalenesulfonic acid salts.This heat-sensitive recording sheet is improved in print running properties under low humidity conditions.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: January 10, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Igarashi, Akihiro Shimomura, Shinichiro Serizawa
  • Patent number: 4797385
    Abstract: A heat-sensitive recording material having on a support a heat-sensitive recording layer which contains a colorless electron-donating dye precursor and an electron-accepting compound as main components, with heat-sensitive recording layer containing granules of starch or its derivative, which has a volume average granule diameter of from 5 to 30 microns, in a proportion of from 0.2 to 5 wt % based on the total weight of solids therein, thereby achieving enhancement of slippability at the recording layer surface without adversely affecting the density of printed characters.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: January 10, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Akira Igarashi
  • Patent number: 4792542
    Abstract: A recording material is described comprising an electron donating colorless dye, an electron accepting compound, and at least one compound represented by formula (I), (II), or (III)Ar.sub.1 O--R--SAr.sub.2 (I)Ar.sub.1 S--R--SAr.sub.2 (II)Ar.sub.1 S--R--X--Ar.sub.2 (III)wherein Ar.sub.1 and Ar.sub.2 each represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic ring, R is a divalent group containing from 1 to 10 carbon atoms, and X represents --COO-- group or ##STR1## group.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: December 20, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masanobu Takashima, Masato Satomura, Ken Iwakura, Akira Igarashi
  • Patent number: 4786629
    Abstract: A heat-sensitive recording material comprising a support provided thereon a heat-sensitive color forming layer comprising an electron donating dye precursor and an electron accepting compound, wherein the support has an oil absorption degree defined according to JIS-P8130 of 10 seconds or less and heat-fusible components contained in the heat-sensitive color forming layer have a fused viscosity at 150.degree. C. of 10 cp or less.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: November 22, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kawakami, Akira Igarashi
  • Patent number: 4751213
    Abstract: A recording material comprising a support having thereon a layer comprising a polymer of an electron-donating color former and an electron-accepting compound which is capable of forming color upon contact with said electron-donating color former. The recording material is useful in duplication by pressure-sensitive or heat-sensitive recording.
    Type: Grant
    Filed: June 10, 1986
    Date of Patent: June 14, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Satomura, Akira Igarashi
  • Patent number: 4728633
    Abstract: A recording material comprising a fluoran derivative represented by formula (I): ##STR1## wherein X.sub.1 represents a group derived from an amine, or a hydrogen atom; Y.sub.1 represents an alkyl group, an alkoxy group, an aryl group, a halogen atom, a group derived from an amine, an aralkyl group, or a hydrogen atom; Z.sub.1 represents a group derived from an amine residue; R.sub.1 represents a halogen atom, a lower alkyl group having 6 or less carbon atoms, or a hydrogen atom; and either R.sub.2 or R.sub.3 represents an alkoxy group or an aryloxy group, and either R.sub.2 or R.sub.3 which does not represent an alkoxy group or an aryloxy group represents an alkyl group, a halogen atom, or a hydrogen atom.
    Type: Grant
    Filed: July 29, 1986
    Date of Patent: March 1, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Satomura, Ken Iwakura, Akira Igarashi
  • Patent number: 4717593
    Abstract: A heat-sensitive recording sheet obtained by applying aqueous dispersions of an electron donating colorless dye and an electron accepting compound to a base is disclosed. This heat-sensitive recording sheet is characterized in that at least one of the aqueous dispersion of the electron donating colorless dye and the aqueous dispersion of the electron accepting compound is dispersion prepared by dispersing by means of a horizontal sand mill.
    Type: Grant
    Filed: October 21, 1982
    Date of Patent: January 5, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Igarashi, Sukenori Nakamura
  • Patent number: 4707464
    Abstract: A recording material comprising: one or more supports, an electron donating leuco dye and one or more electron accepting compound(s) is disclosed, in which said electron accepting compound(s) is/are represented by formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group or an aryl group; Ar represents a substituted or unsubstituted polycyclic aryl group; and X.sub.1 and X.sub.2, which may be the same or different, each represents a hydrogen atom, a lower alkyl group, a lower alkenyl group or a halogen atom. The material exhibits improved preservability before and after recording and solvent resistance.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: November 17, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masanobu Takashima, Masato Satomura, Ken Iwakura, Akira Igarashi
  • Patent number: 4686124
    Abstract: A thermoplastic resin-silicone rubber composite shaped article comprising (a) a shaped article of a thermoplastic resin selected from the group consisting of soft vinyl chloride resins, olefin resins, urethane resins and styrene resins and (b) a cured layer of an addition polymerization type silicone rubber composition adhering to the one or both surfaces of the shaped article of a thermoplastic resin. To the surface of the above shaped article of a thermoplastic resin to which the above cured layer of an addition polymerization type silicone rubber composition does not adhere, there may adhere another cured layer of the above addition polymerization type silicone rubber composition. To either or both of these cured layers, there may further adhere a layer of the above thermoplastic resin, other thermoplastic resin, a silicone rubber, a silicone resin, glass, ceramics or a metal.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: August 11, 1987
    Assignees: Sumitomo Bakelite Company Ltd., Fuji Systems Corporation
    Inventors: Masayuki Onohara, Kenji Kawai, Masaru Shibata, Akira Igarashi, Nobuhisa Kawaguchi
  • Patent number: 4646113
    Abstract: A heat-sensitive recording sheet comprises a colorless or pale-colored electron donating colorless dye precursor, an electron accepting compound which forms color when reacted upon heating with the colorless dye precursor and a heat-fusible substance. The electron accepting compound is 1,4-bis(p-hydroxycumyl) benzene and the heat-fusible substance is 1-p-ethylphenoxy-2-phenoxyethane.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: February 24, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Igarashi, Kensuke Ikeda, Kenji Ikeda
  • Patent number: 4644377
    Abstract: A fluoran derivative with an arylamino group at the 2-position of the fluoran ring, a long-chain alkyl group at the 3-position of the fluoran ring and an amine residue at the 6-position of the fluoran ring, which can be effectively employed as a dye precursor in black color-forming type recording materials.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: February 17, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masato Satomura, Akira Igarashi, Ken Iwakura
  • Patent number: 4628335
    Abstract: A heat-sensitive recording material is described, comprising a heat-sensitive color forming layer containing a colorless or pale colored electron donating dye precursor and an electron accepting compound that reacts with said dye precursor to develop color, wherein said electron accepting compound is a bishydroxycumylbenzene or bishydroxy-.alpha.-methylbenzylbenzene compound.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: December 9, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Igarashi, Kenji Ikeda, Kensuke Ikeda
  • Patent number: 4582762
    Abstract: A soft vinyl chloride resin-silicone composite shaped article consisting of a soft vinyl chloride resin shaped article and a cured layer of an addition polymerization type silicone composition adhered to the surface of the vinyl chloride resin shaped article, wherein said addition polymerization type silicone composition contains an organohydrogenpolysiloxane having at least two hydrogen atoms directly bonding with silicon atoms in each molecule, in an amount enough to provide one to six such hydrogen atoms per one vinyl group of the silicone composition. The above composite shaped article has a very high bonding strength between the vinyl chloride resin shaped article and the cured layer of an addition polymerization type silicone composition.
    Type: Grant
    Filed: October 29, 1984
    Date of Patent: April 15, 1986
    Assignees: Sumitomo Bakelite Company Ltd., Fuji Systems Corporation
    Inventors: Masayuki Onohara, Masaru Shibata, Akira Igarashi, Nobuhisa Kawaguchi
  • Patent number: 4554566
    Abstract: A heat-sensitive recording material is described, comprising a heat-sensitive recording layer containing an electron-donating colorless dye and an electron-accepting compound, said heat-sensitive layer being provided on a support member, and said heat-sensitive layer containing from 5 to 50% by weight, based on the total weight of the heat-sensitive layer-constituting components, of polymer particles having an average particle size of from 0.03 to 16 microns, selected from the group consisting of ethylene-.alpha.-olefin copolymer particles, low density polyethylene particles, and ethylene-vinyl acetate copolymer particles.
    Type: Grant
    Filed: September 21, 1984
    Date of Patent: November 19, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junichi Yoneda, Akira Igarashi