Patents by Inventor Ryozo Akiyama

Ryozo Akiyama 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).

  • Publication number: 20060025497
    Abstract: There is proposed an inkjet ink composition comprising a pigment component to which a resin having a basic terminal is adsorbed, a photo-acid generating agent containing an onium salt, and at least one kind of solvent which can be polymerized under the presence of an acid. The content of multivalent salt included in the onium salt is not more than 20% by weight based on a total weight of onium salt, and the content of the pigment component is confined within the range of 3 to 41% by weight based on the ink composition.
    Type: Application
    Filed: March 8, 2005
    Publication date: February 2, 2006
    Inventors: Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Ryozo Akiyama, Masashi Hiroki
  • Publication number: 20060023043
    Abstract: There is proposed an inkjet ink comprising a compound represented by the following general formula (1), a cationic photopolymerization initiator, a cationic photopolymerizable compound, and a pigment having an average particle diameter of 300 nm or less, wherein the cationic photopolymerization initiator is included at a ratio of 0.5% by weight to 8% by weight based on 100% by weight of the cationic photopolymerizable compound, and the inkjet ink has a viscosity of 50 mPa·sec or less at ordinary temperature, (wherein R is a monovalent organic group having 1 to 5 carbon atoms, R1 and R2 may be the same or different and are individually hydrogen atom or alkyl group, alkyl sulfonyl group or alkoxy group each having 1 to 3 carbon atoms).
    Type: Application
    Filed: February 23, 2005
    Publication date: February 2, 2006
    Inventors: Mitsuru Ishibashi, Toru Ushirogouchi, Ryozo Akiyama, Kazuhiko Ohtsu, Masashi Hiroki
  • Publication number: 20060021537
    Abstract: There is proposed a method of curing an electromagnetic radiation-curing type liquid composition comprising a solvent polymerizable in the presence of an acid, and a photo-acid generating agent which is dissolved in the solvent and capable of generating the acid when irradiated with electromagnetic radiation.
    Type: Application
    Filed: July 1, 2005
    Publication date: February 2, 2006
    Inventors: Kazuhiko Ohtsu, Toru Ushirogouchi, Ryozo Akiyama, Hiroshi Kiyomoto, Mitsuru Ishibashi, Masashi Hiroki, Yukiko Kawakami
  • Publication number: 20060017769
    Abstract: There is proposed a washing solution for washing an inkjet printer head which performs printing by feeding an ink comprising at least two kinds of polymerizable compounds each differing in viscosity, a photopolymerization initiator, and pigment. This washing solution is characterized in that it contains not less than 50 parts by weight of a polymerizable compound selected from the polymerizable compounds included in the ink and having a lowest viscosity among the polymerizable compounds, or not less than 50 parts by weight of a polymerizable compound having a viscosity of 30 mPa·sec or less at ordinary temperature.
    Type: Application
    Filed: February 23, 2005
    Publication date: January 26, 2006
    Inventors: Ryozo Akiyama, Toru Ushirogouchi, Mitsuru Ishibashi, Kazuhiko Ohtsu, Masashi Hiroki
  • Patent number: 6959986
    Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: November 1, 2005
    Assignees: Toshiba Tec Kabushiki Kaisha, Kabushiki Kaisha Toshiba
    Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
  • Publication number: 20050168553
    Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa.s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.
    Type: Application
    Filed: March 31, 2005
    Publication date: August 4, 2005
    Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
  • Publication number: 20050168556
    Abstract: There is disclosed a liquid ink including a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mpa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.
    Type: Application
    Filed: March 31, 2005
    Publication date: August 4, 2005
    Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
  • Publication number: 20050113476
    Abstract: There is provided an inkjet ink comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a color component, and an acid-polymerizable compound which can be polymerized in the presence of an acid, wherein at least 40% of the acid-polymerizable solvent is a vinyl ether compound represented by the following general formula (1): R13—R14—(R13)p ??(1) (Wherein R13(s) is a group selected from the group consisting of a vinyl ether group, a group having a vinyl ether skeleton, an alkoxy group, substituted hydroxyl group and hydroxyl group wherein at least one of R13(s) is vinyl ether group or a group having a vinyl ether skeleton, R14 is a group comprising a substituted or unsubstituted cyclic skeleton and having a valence of (p+1), and p is a positive integer including zero).
    Type: Application
    Filed: October 20, 2004
    Publication date: May 26, 2005
    Inventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu, Mitsuru Ishibashi, Hiroshi Kiyomoto, Yukiko Kawakami
  • Publication number: 20050090582
    Abstract: There is provided a pigment dispersion comprising at least one resin-coated pigment comprising a resin and a pigment, and having an average particle diameter of 250 nm or less, and a dispersion medium containing as a major component a cation polymeric compound having a viscosity of 30 mPa.s or less at a temperature of 25° C. and a boiling point of 150° C. or more at 1 atm. The pigment is incorporated in the pigment dispersion at a ratio ranging from 3 to 41% by weight based on a total weight of the dispersion medium, and the resin is incorporated in the resin-coated pigment at a ratio ranging from 5 to 37% by weight based on the weight of the pigment.
    Type: Application
    Filed: October 20, 2004
    Publication date: April 28, 2005
    Inventors: Toru Ushirogouchi, Ryozo Akiyama, Kazuhiko Ohtsu, Masashi Hiroki, Mitsuru Ishibashi
  • Publication number: 20050090580
    Abstract: There is disclosed an ink for ink jet recording, comprising a photo-acid generating agent which is capable of generating an acid as it is irradiated with light, a colorant, and an acid-polymerizable solvent which can be polymerized in the presence of an acid. In this ink, the content of the photo-acid generating agent is not less than 2.5 [5] parts by weight per 100 parts by weight of the acid-polymerizable solvent, and the acid-polymerizable solvent comprises an aliphatic epoxy compound represented by the following general formula (1) and an oxetane ring-containing compound: R1-CH2—C CH3)2—CH2—R1 ??(1) (wherein R1 is glycidyl ether group).
    Type: Application
    Filed: May 27, 2004
    Publication date: April 28, 2005
    Inventors: Masashi Hiroki, Toru Ushirogochi, Kazuhiko Ohtsu, Ryozo Akiyama, Mitsuru Ishibashi
  • Publication number: 20050057630
    Abstract: There is disclosed an ink jet recording apparatus comprising a color ink container having a capacity V1 accommodating therein a solvent polymerizable in the presence of an acid and a colorant, a reaction liquid container having a capacity V2 (V2<V1) accommodating therein a reaction liquid comprising a solvent, and a photo-acid generating agent capable of generating an acid when irradiated with light, an stirring container mixing the color ink and the reaction liquid at a mixing ratio of S1:S2 (the color ink:the reaction liquid) to prepare a recording ink, a color ink supply means feeding the color ink to the stirring container, a reaction liquid supply means feeding the reaction liquid to the stirring container, an ink jet recording head ejecting the recording ink to a recording medium, and a supply tube feeding the recording ink to the recording head.
    Type: Application
    Filed: March 22, 2004
    Publication date: March 17, 2005
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: Masashi Hiroki, Kazuhiko Ohtsu, Yoshito Endo, Toru Ushirogouchi, Ryozo Akiyama
  • Publication number: 20040259976
    Abstract: There is disclosed a processed pigment comprising a pigment having a dispersing agent adsorbed physically and/or chemically onto part of the surface of the pigment, and a cationic polymerizable compound bonded through a covalent bond to the surface of the pigment. Preferably, the cationic polymerizable compound is formed of an alicyclic epoxy compound.
    Type: Application
    Filed: February 24, 2004
    Publication date: December 23, 2004
    Inventors: Ryozo Akiyama, Toru Ushirogouchi, Kazuhiko Ohtsu
  • Publication number: 20030231234
    Abstract: There is disclosed a liquid ink comprising a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained in the liquid ink falls within a range of between 1 part by weight and 10 parts by weight relative to 100 parts by weight of the solvent, the coloring component consists of a pigment, and the solvent contains at least 50 parts by weight of an acid polymerizable compound, the acid polymerizing compound polymerizing in the presence of the acid, having an alicyclic skeleton and/or an aliphatic skeleton having a viscosity of 50 mPa·s or less and a boiling point of 150° C. or more under room temperature and atmospheric pressure.
    Type: Application
    Filed: April 22, 2003
    Publication date: December 18, 2003
    Inventors: Toru Ushirogouchi, Chiaki Tanuma, Kazuhiko Ohtsu, Ryozo Akiyama, Masashi Hiroki, Yoshito Endo
  • Publication number: 20030063172
    Abstract: An ink jet recording apparatus variably controls a time from the hitting of a UV-ray curable ink, for example, UV-ink after being discharged from an ink Jet recording head on a recording medium to the irradiation of UV-ray to the ink. That is, UV-rays are irradiated to the ink so as to be the permeability amount of the ink obtained by the Bristow method more than Vr and less than 0.7 Vmax, preferably, more than Vr and less than 0.3 Vmax, after the transfer of the ink to the recording medium (Tw), whereby lowering of the image density, and occurrence of odor caused in a case of excess permeability can be prevented.
    Type: Application
    Filed: September 12, 2002
    Publication date: April 3, 2003
    Applicant: Toshiba Tec Kabushiki Kaisha
    Inventors: Kazuhiko Ohtsu, Koichi Adachi, Ryozo Akiyama, Minoru Koyata
  • Patent number: 5294961
    Abstract: A recording apparatus has a development unit for depositing a toner on an electrostatic latent image on the outer surface of a photosensitive drum while attractively collecting a residual toner on the surface of the photosensitive drum, a transfer charger device for transferring the toner image to a transfer sheet, a conductive brush for uniformalizing a residual toner distribution on the photosensitive drum, after a transfer step has been carried out, and at the same time charging the surface of the photosensitive drum, and a scorotron charger located on the downstream side of the conductive brush, but on the upstream side of the exposure device, and assisting the charging of the drum surface by the conductive brush. The surface of the drum charged by the scorotron charger is exposed by a light beam to provide an electrostatic latent image thereon.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: March 15, 1994
    Assignee: Tokyo Electric Co., Ltd.
    Inventors: Yoshimitsu Ohtaka, Ryozo Akiyama, Tomoyuki Kato
  • Patent number: 5280329
    Abstract: Disclosed herein is a fixing device comprising a heater which is formed of a heating element produced by dispersing particles of ceramic having a negative resistance-temperature coefficient into a binding member. The heater is formed by mounting a heat-shrinkable tubing on the heating element. A heating temperature of the heater is adjusted based on the thickness of the heat-shrinkable tubing. In addition, the heating element is covered by the heat-shrinkable tubing so as to reduce its high surface roughness.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: January 18, 1994
    Assignee: Tokyo Electric Co., Ltd.
    Inventors: Ryozo Akiyama, Yoshimitsu Ohtake
  • Patent number: 5087299
    Abstract: A vibration-proof tungsten wire which forms, in cases where the diameter of the wire is D mm and when an electric current corresponding to 90% of the fusion current value is passed therethrough for 5 minutes, a wire havinga crystal grain boundary at which bubbles of 0.3 .mu.m or less in diameter are dispersed in bubble rows with lengths of (0.39/D).sup.2 .times.3 .mu.m or more arrayed in the wire axis direction of said crystal grain boundary, and bubbles of 0.2 .mu.m or less in diameter are randomly dispersed; anda crystal grain in which bubbles of 0.3 .mu.m or less in diameter are dispersed in rows with lengths of (0.39/D).sup.2 .times.30 .mu.m or more arrayed in the wire axis direction within said crystal grain, and bubbles of 0.2 .mu.m or less are randomly dispersed;a process for preparing the same; and a tungsten filament obtained from the above-defined wire. The doped tungsten wire of this invention possesses excellent vibration-proof property on lighting as well as high reliability.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: February 11, 1992
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Material Engineering Corporation
    Inventors: Mikiharu Fukuchi, Yasuhiko Nakano, Keisuke Hayashi, Isamu Koseki, Masami Ito, Ryozo Akiyama