Patents by Inventor Takashi Kusaba

Takashi Kusaba 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: 10494317
    Abstract: A catalyst which is highly active in dehydrogenation reaction of an alkylaromatic hydrocarbon not only in high-temperature regions (e.g. 600 to 650° C.) as found in the inlet of a catalyst bed in an apparatus for the production of SM but also in low-temperature regions (e.g. under 600° C.) as found in the outlet of a catalyst bed in an apparatus for the production of SM, where the temperature decreases as a result of endothermic reaction; and a process for producing the catalyst; and a dehydrogenation process using the catalyst. The catalyst contains iron (Fe), potassium (K), and cerium (Ce), and at least one rare earth element other than cerium.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: December 3, 2019
    Assignee: CLARIANT CATALYSTS (JAPAN) K.K.
    Inventors: Nobuaki Kodakari, Shinya Hirahara, Yuma Kuraguchi, Takashi Kusaba
  • Publication number: 20180370872
    Abstract: A catalyst which is highly active in dehydrogenation reaction of an alkylaromatic hydrocarbon not only in high-temperature regions (e.g. 600 to 650° C.) as found in the inlet of a catalyst bed in an apparatus for the production of SM but also in low-temperature regions (e.g. under 600° C.) as found in the outlet of a catalyst bed in an apparatus for the production of SM, where the temperature decreases as a result of endothermic reaction; and a process for producing the catalyst; and a dehydrogenation process using the catalyst. The catalyst contains iron (Fe), potassium (K), and cerium (Ce), and at least one rare earth element other than cerium.
    Type: Application
    Filed: December 8, 2016
    Publication date: December 27, 2018
    Inventors: Nobuaki Kodakari, Shinya Hirahara, Yuma Kuraguchi, Takashi Kusaba
  • Patent number: 8768227
    Abstract: A developing roller includes: a mandrel; an elastic layer provided for an outer periphery of the mandrel, the elastic layer including an addition-curing silicone rubber; and a surface layer provided for an outer periphery of the elastic layer, in which: the elastic layer includes a compound represented by the following formula (1); when the content of such a compound that n in the formula (1) represents an integer of 3 to 12 in the elastic layer is represented by P1, and the content of such a compound that n in the formula (1) represents an integer of 13 to 20 in the elastic layer is represented by P2, P1+P2 is 5,000 ppm by mass to 12,000 ppm by mass; and P1 is 1,500 ppm by mass to 6,000 ppm by mass (In the formula (1), n represents an integer of 3 to 20):
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: July 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shohei Urushihara, Minoru Nakamura, Kunimasa Kawamura, Masaki Yamada, Takashi Kusaba
  • Publication number: 20140072350
    Abstract: A developing roller includes: a mandrel; an elastic layer provided for an outer periphery of the mandrel, the elastic layer including an addition-curing silicone rubber; and a surface layer provided for an outer periphery of the elastic layer, in which: the elastic layer includes a compound represented by the following formula (1); when the content of such a compound that n in the formula (1) represents an integer of 3 to 12 in the elastic layer is represented by P1, and the content of such a compound that n in the formula (1) represents an integer of 13 to 20 in the elastic layer is represented by P2, P1+P2 is 5,000 ppm by mass to 12,000 ppm by mass; and P1 is 1,500 ppm by mass to 6,000 ppm by mass (In the formula (1), n represents an integer of 3 to 20):
    Type: Application
    Filed: February 19, 2013
    Publication date: March 13, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shohei Urushihara, Minoru Nakamura, Kunimasa Kawamura, Masaki Yamada, Takashi Kusaba
  • Patent number: 8655238
    Abstract: Provided is a developing roller including elastic layer and resin layer adhered to each other and having an appropriately resistance, thereby suppressing fogging. The developing member comprises a mandrel; an elastic layer; and a resin layer, wherein: the resin layer comprises polyurethane resin obtained by isocyanate and polyol; and the elastic layer includes cured silicone rubber composition comprising (a)-(d): (a) organopolysiloxane having two or more alkenyl groups bonded to silicon atom and having methyl group as a group other than the alkenyl bonded to the silicon; (b) organopolysiloxane having three or more hydrogen atoms bonded to silicon atom and having methyl group as a group bonded to the silicon; (c) carbon black; (d) organopolysiloxane represented by formula (1) and having Mw of 18,000-110,000 and Mw/Mn of 1.0-2.0 (R1 represents alkenyl group, R2 represents functional group reacting with isocyanate, and n represents an integer of 1 or more).
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: February 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Uno, Takashi Kusaba, Shohei Urushihara, Ryo Sugiyama
  • Patent number: 8600273
    Abstract: A developing roller including a mandrel, an elastic layer provided on the mandrel and containing a cured material of an addition curable-type dimethyl silicone rubber, and a surface layer containing a urethane resin that covers the circumferential surface of the elastic layer. The urethane resin has a structure represented by the following formula (1), and one or both structures selected from a structure represented by the following formula (2) and a structure represented by the following formula (3) between two adjacent urethane linkages.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: December 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Yamada, Takashi Kusaba, Kunimasa Kawamura, Yuji Sakurai, Toru Ishii
  • Publication number: 20130266339
    Abstract: Provided is an electro-conductive member showing small unevenness of the residual state of charge. The electro-conductive member is an electro-conductive member, comprising: a substrate whose surface is electro-conductive; and an electro-conductive elastic layer provided on the substrate, wherein the elastic layer is obtained by curing a mixture containing the following (A) to (D): (A) an organopolysiloxane having at least two vinyl groups bonded to a silicon atom; (B) an organopolysiloxane represented by the following chemical structural formula (1); (C) a hydrogen polysiloxane having at least two hydrosilyl groups; and (D) carbon black (l, m, and n in the chemical structural formula (1) each independently represent a positive integer).
    Type: Application
    Filed: June 7, 2013
    Publication date: October 10, 2013
    Inventors: Ryo Sugiyama, Takashi Kusaba, Shohei Urushihara, Masashi Uno
  • Patent number: 8529806
    Abstract: There is provided a process for producing a regenerated elastic roller which can be again used for the formation of high-quality electrophotographic images by sufficiently relaxing a compression set of the elastic roller having the compression set caused in an elastic layer in usage. The process for producing a regenerated elastic roller includes a step of heating an elastic roller having a conductive mandrel and an elastic layer and having a compression set caused in the elastic layer, in a cylindrical mold to thermally expand the elastic layer and to cause a surface of the elastic roller to contact an inner wall of the cylindrical mold.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kunimasa Kawamura, Takashi Kusaba, Shohei Urushihara
  • Publication number: 20120195631
    Abstract: A developing roller used for formation of an electrophotographic image with high quality is provided in which even in storage and use under a high temperature and high humidity environment, peel-off of a surface layer from an elastic layer is suppressed, and a toner hardly adheres to the surface of the developing roller. The developing roller is a developing roller including a mandrel, an elastic layer provided on the mandrel and containing a cured material of an addition curable-type dimethyl silicone rubber, and a surface layer containing a urethane resin that covers the circumferential surface of the elastic layer, wherein the urethane resin has a structure represented by the following formula (1), and one or both structures selected from a structure represented by the following formula (2) and a structure represented by the following formula (3) between two adjacent urethane linkages.
    Type: Application
    Filed: April 3, 2012
    Publication date: August 2, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masaki Yamada, Takashi Kusaba, Kunimasa Kawamura, Yuji Sakurai, Toru Ishii
  • Publication number: 20120091608
    Abstract: There is provided a process for producing a regenerated elastic roller which can be again used for the formation of high-quality electrophotographic images by sufficiently relaxing a compression set of the elastic roller having the compression set caused in an elastic layer in usage. The process for producing a regenerated elastic roller includes a step of heating an elastic roller having a conductive mandrel and an elastic layer and having a compression set caused in the elastic layer, in a cylindrical mold to thermally expand the elastic layer and to cause a surface of the elastic roller to contact an inner wall of the cylindrical mold.
    Type: Application
    Filed: December 22, 2011
    Publication date: April 19, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kunimasa Kawamura, Takashi Kusaba, Shohei Urushihara
  • Patent number: 7979004
    Abstract: The electrophotographic belt of the present invention is characterized that, in the electrophotographic belt composed of the thermoplastic resin composition containing thermoplastic resin, with respect to a flake-shaped portion having an arc length of 5% of the inner peripheral length of the electrophotographic belt, when the thickness of the flake-shaped portion is measured at intervals of 1 mm in the peripheral direction, the difference between the maximum value and the minimum value of the measured value is 2% or more and 20% or less of an arithmetic average value.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: July 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Tanaka, Takashi Kusaba, Hidekazu Matsuda, Yuji Sakurai, Akihiko Nakazawa
  • Patent number: 7570905
    Abstract: A developing roller having an elastic layer on the outer periphery of a mandrel and having a surface layer containing a resin and resin particles on its outer periphery, wherein the surface layer has a convex portion attributable to the resin particles, and has a surface of roughness in which a distortion degree Rsk of a roughness curve is 0.15 or more and 0.70 or less, wherein the resin particles have a peak P1 at a particle diameter d1 in a volume particle size distribution, and wherein “a”, “b”, “c”, d1, d2 and d3 satisfy a specific relationship, where, “a” denotes a volume fraction of the resin particle having the particle diameter d1 in the volume particle size distribution, and “b” and “c” denote volume fractions at particle diameters d2 and d3 respectively in the volume particle size distribution.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: August 4, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kusaba, Ryota Kashiwabara, Minoru Nakamura
  • Publication number: 20090123195
    Abstract: A developing roller having an elastic layer on the outer periphery of a mandrel and having a surface layer containing a resin and resin particles on its outer periphery, wherein the surface layer has a convex portion attributable to the resin particles, and has a surface of roughness in which a distortion degree Rsk of a roughness curve is 0.15 or more and 0.70 or less, wherein the resin particles have a peak P1 at a particle diameter dl in a volume particle size distribution, and wherein “a”, “b”, “c”, d1, d2 and d3 satisfy a specific relationship, where, “a” denotes a volume fraction of the resin particle having the particle diameter dl in the volume particle size distribution, and “b” and “c” denote volume fractions at particle diameters d2 and d3 respectively in the volume particle size distribution.
    Type: Application
    Filed: December 19, 2008
    Publication date: May 14, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi KUSABA, Ryota KASHIWABARA, Minoru NAKAMURA
  • Publication number: 20080193172
    Abstract: A developing roller having an elastic layer on the outer periphery of a mandrel and having a surface layer containing a resin and resin particles on its outer periphery, wherein the surface layer has a convex portion attributable to the resin particles, and has a surface of roughness in which a distortion degree Rsk of a roughness curve is 0.15 or more and 0.70 or less, wherein the resin particles have a peak P1 at a particle diameter d1 in a volume particle size distribution, and wherein “a”, “b”, “c”, d1, d2 and d3 satisfy a specific relationship, where, “a” denotes a volume fraction of the resin particle having the particle diameter d1 in the volume particle size distribution, and “b” and “c” denote volume fractions at particle diameters d2 and d3 respectively in the volume particle size distribution.
    Type: Application
    Filed: April 2, 2008
    Publication date: August 14, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Kusaba, Ryota Kashiwabara, Minoru Nakamura
  • Patent number: 7352984
    Abstract: An electrophotographic endless belt containing a polyamide resin, carbon black and a filler, characterized in that the polyamide resin is at least one resin selected from the group consisting of polyamide 610, polyamide 612, polyamide 11 and polyamide 12, the filler is at least one filler selected from the group consisting of an oxide, a hydroxide, a carbonate and a silicate, and weight (A) of the polyamide resin and total weight (B) of the carbon black and the filler is in a ratio (A:B) of from 90:10 to 50:50. Also disclosed are an electrophotographic apparatus having the electrophotographic endless belt, and a process for producing the electrophotographic endless belt.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: April 1, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hidekazu Matsuda, Akihiko Nakazawa, Atsushi Tanaka, Takashi Kusaba, Yuji Sakurai
  • Patent number: 7208211
    Abstract: In an electrophotographic belt member comprising a resin composition, the resin composition contains from 30% by weight to 90% by weight of a thermoplastic resin, from 2% by weight to 30% by weight of a compound selected from the group consisting of a polyether-ester amide, a polyether ester and a polyether amide, from 0% by weight to 5% by weight of an electrolyte, and from 2% by weight to 50% by weight of an insulating filler. Also disclosed are a process for producing the electrophotographic belt member, and an electrophotographic apparatus having the electrophotographic belt member.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: April 24, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Tanaka, Akihiko Nakazawa, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Patent number: 7201967
    Abstract: In an electrophotographic endless belt having a resin layer formed of a resin composition containing a polyamide, the resin composition further contains a copolymer obtained by copolymerization of an olefin and an oxygen-containing heterocyclic compound, a curve (T-log10 ? curve) showing the relationship between temperature T (° C.) and common logarithm log10 ? of melt viscosity ? (Pa·s), of the resin composition has, in the range of log10 ? of from log10 1,000 to log10 8,000, a gently inclined region the inclination ? log10 ?/?T of which is from ?0.02 to 0, and the gently inclined region has a temperature range of 10° C. or more, and the resin layer has a thickness the maximum thickness of which is 115% or less of the average value of the thickness of the resin layer and the minimum thickness of which is 85% or more of the average value of the thickness of the resin layer. Also disclosed is a process for producing the above electrophotographic endless belt.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: April 10, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Sakurai, Akihiko Nakazawa, Atsushi Tanaka, Hidekazu Matsuda, Takashi Kusaba
  • Publication number: 20070014943
    Abstract: A process is disclosed producing an intermediate transfer member used in an image-forming apparatus in which an image formed on a first image-bearing member is transferred to a second image-bearing member. The process has the steps of melt-extruding an extrusion material from a circular die by means of an extruder and thereafter making the same into a desired shape to obtain a cylindrical extruded product, and forming the resultant cylindrical extruded product into the intermediate transfer member. The cylindrical extruded product contains a thermoplastic resin and an ion-conductive resistance control agent, and a ratio of the diameter of the intermediate transfer member obtained to the die diameter of the circular die is from 0.5 to 4.0. Also disclosed are an intermediate transfer member obtained by the production process, and an intermediate transfer member having the intermediate transfer member.
    Type: Application
    Filed: September 19, 2006
    Publication date: January 18, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Minoru Shimojo, Hiroyuki Kobayashi, Akihiko Nakazawa, Akira Shimada, Atsushi Tanaka, Tsunenori Ashibe, Takashi Kusaba, Hidekazu Matsuda
  • Publication number: 20060226572
    Abstract: An electrophotographic endless belt is disclosed having a layer formed of a resin composition containing (i) at least one resin selected from the group consisting of a polyether ester amide, a polyolefin ether and a polyether amide; (ii) polyvinylidene fluoride; and (iii) carbon. In the resin composition, the ratio of the mass of the component (iii) to the mass of the component (i) is in a specific range.
    Type: Application
    Filed: December 23, 2005
    Publication date: October 12, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Atsushi Tanaka, Akihiko Nakazawa, Takashi Kusaba, Hidekazu Matsuda, Kenichi Yamauchi, Yuji Sakurai, Norifumi Muranaka
  • Publication number: 20060127617
    Abstract: The electrophotographic belt of the present invention is characterized that, in the electrophotographic belt composed of the thermoplastic resin composition containing thermoplastic resin, with respect to a flake-shaped portion having an arc length of 5% of the inner peripheral length of the electrophotographic belt, when the thickness of the flake-shaped portion is measured at intervals of 1 mm in the peripheral direction, the difference between the maximum value and the minimum value of the measured value is 2% or more and 20% or less of an arithmetic average value.
    Type: Application
    Filed: February 2, 2006
    Publication date: June 15, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Tanaka, Takashi Kusaba, Hidekazu Matsuda, Yuji Sakurai, Akihiko Nakazawa