Patents by Inventor Sayaka Katoh

Sayaka Katoh 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: 9791808
    Abstract: The surface layer of an intermediate transfer belt has a concavo-convex pattern formed thereon by spherical resin particles which are independently embedded in the layer so that the embedment rate in the thickness direction of the layer is higher than 50% but lower than 100%.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: October 17, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Jun Aoto, Hidetaka Kubo, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta, Shigeo Oonuma
  • Publication number: 20160313676
    Abstract: A surface processor processing the surface of a recording medium before a toner image is formed thereon includes a surface reformer to reform the surface of the recording medium a toner image is formed on; and an applicator to apply the surface of the recording medium after reformed with a toner affinity ingredient.
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Inventors: Masahide YAMASHITA, Koichi KATO, Mayumi YOSHIHARA, Sayaka KATOH
  • Publication number: 20160033920
    Abstract: A surface processor processing the surface of a recording medium before a toner image is formed thereon includes a surface reformer to reform the surface of the recording medium a toner image is formed on; and an applicator to apply the surface of the recording medium after reformed with a toner affinity ingredient.
    Type: Application
    Filed: July 13, 2015
    Publication date: February 4, 2016
    Inventors: Masahide YAMASHITA, Koichi KATO, Mayumi YOSHIHARA, Sayaka KATOH
  • Patent number: 9223256
    Abstract: An intermediate transfer belt including a base layer, and an elastic layer on the base layer containing spherical particles on a surface thereof and containing an elastic layer ingredient, wherein the elastic layer contains a fatty acid in an amount of 0.001 parts by mass to 0.040 parts by mass relative to 100 parts by mass of the elastic layer ingredient.
    Type: Grant
    Filed: September 12, 2013
    Date of Patent: December 29, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Sayaka Katoh, Jun Aoto, Kenichi Mashiko, Shinichi Nitta, Atsuo Hirai
  • Patent number: 9063475
    Abstract: To provide an intermediate transfer belt for use in an electrophotographic apparatus, including as an outermost surface thereof: uniform convex regions formed by aligning independent spherical resin particles in a surface direction; and depressed regions formed of a lubricant layer which respectively lie between the convex regions.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: June 23, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Jun Aoto, Hidetaka Kubo, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta
  • Patent number: 8934821
    Abstract: To provide a belt for an image forming apparatus, which contains: a base layer; an elastic layer; and spherical particles, wherein the belt for an image forming apparatus is provided across a plurality of rollers of the image forming apparatus to rotate, wherein the belt for an image forming apparatus has a laminate structure where at least the base layer and the elastic layer are provided in this order, wherein the spherical particles are partially embedded in an exposed surface of the elastic layer, and wherein, relative to a width direction of the belt for an image forming apparatus, a thickness of an edge portion of the belt for an image forming apparatus is 50% to 95% of a thickness of a center portion of the belt for an image forming apparatus, and an edge curling amount of the belt is 4 mm or less.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: January 13, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Sayaka Katoh, Daisuke Aoki
  • Patent number: 8760717
    Abstract: To provide an intermediate transfer belt, containing a base, an elastic layer formed on the base, and spherical particles deposited on a surface of the elastic layer, in which wherein the elastic layer has micro rubber hardness of 40° or lower in the environment of 10° C. and 15% RH, and the intermediate transfer belt is designed to be mounted in an image forming apparatus.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: June 24, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta
  • Patent number: 8718520
    Abstract: To provide an intermediate transfer belt, which contains a base layer, and an elastic layer formed on the base layer, wherein the base layer contains polyimide which has a constitutional unit derived from pyromellitic acid and a constitutional unit derived from diaminodiphenyl ether, wherein the intermediate layer has a curling amount of 1.5 mm or less in an absolute value, and wherein the intermediate transfer belt is configured to receive, by transferring, a toner image formed by developing, with a toner, a latent image formed on an image bearing member.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: May 6, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Sayaka Katoh
  • Publication number: 20140079445
    Abstract: An intermediate transfer belt including a base layer, and an elastic layer on the base layer containing spherical particles on a surface thereof and containing an elastic layer ingredient, wherein the elastic layer contains a fatty acid in an amount of 0.001 parts by mass to 0.040 parts by mass relative to 100 parts by mass of the elastic layer ingredient.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 20, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Sayaka KATOH, Jun AOTO, Kenichi MASHIKO, Shinichi NITTA, Atsuo HIRAI
  • Patent number: 8521073
    Abstract: An intermediate transfer member including a base layer as first layer, an elastic layer as second layer, and a particle layer as third layer and containing fine spherical particles arranged in plane direction thereof where the particle layer has a concavo-convex pattern formed by the fine spherical particles, the elastic layer and the particle layer being formed on the base layer in this order, wherein the intermediate transfer member has a Martens hardness of 1.0 N/mm2 or lower and an elastic recovery rate of 75% or higher when the intermediate transfer member is indented at a load of 40 mN under conditions of 25° C. and 50% RH, wherein an embedment rate of the fine spherical particles in the elastic layer is 33% to 99%, and wherein the intermediate transfer member is configured to receive a toner image formed by developing, with a toner, a latent image on an image bearing member.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: August 27, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Shinichi Nitta, Sayaka Katoh
  • Publication number: 20130129395
    Abstract: To provide a belt for an image forming apparatus, which contains: a base layer; an elastic layer; and spherical particles, wherein the belt for an image forming apparatus is provided across a plurality of rollers of the image forming apparatus to rotate, wherein the belt for an image forming apparatus has a laminate structure where at least the base layer and the elastic layer are provided in this order, wherein the spherical particles are partially embedded in an exposed surface of the elastic layer, and wherein, relative to a width direction of the belt for an image forming apparatus, a thickness of an edge portion of the belt for an image forming apparatus is 50% to 95% of a thickness of a center portion of the belt for an image forming apparatus, and an edge curling amount of the belt is 4 mm or less.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 23, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Sayaka Katoh, Daisuke Aoki
  • Publication number: 20130004212
    Abstract: To provide an intermediate transfer belt, which contains a base layer, and an elastic layer formed on the base layer, wherein the base layer contains polyimide which has a constitutional unit derived from pyromellitic acid and a constitutional unit derived from diaminodiphenyl ether, wherein the intermediate layer has a curling amount of 1.5 mm or less in an absolute value, and wherein the intermediate transfer belt is configured to receive, by transferring, a toner image formed by developing, with a toner, a latent image formed on an image bearing member.
    Type: Application
    Filed: June 20, 2012
    Publication date: January 3, 2013
    Inventors: Hidetaka KUBO, Jun Aoto, Kenichi Mashiko, Sayaka Katoh
  • Publication number: 20120262739
    Abstract: To provide an intermediate transfer belt, containing a base, an elastic layer formed on the base, and spherical particles deposited on a surface of the elastic layer, in which wherein the elastic layer has micro rubber hardness of 40° or lower in the environment of 10° C. and 15% RH, and the intermediate transfer belt is designed to be mounted in an image forming apparatus.
    Type: Application
    Filed: March 14, 2012
    Publication date: October 18, 2012
    Applicant: Ricoh Company, Ltd.
    Inventors: Hidetaka Kubo, Jun Aoto, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta
  • Publication number: 20120201578
    Abstract: An intermediate transfer belt configured to receive a toner image formed by developing, with a toner, a latent image on an image bearing member, the intermediate transfer belt including a base layer and an elastic layer laid on the base layer, wherein the elastic layer includes spherical resin particles and a layer formed of an elastic body, and has a concavo-convex pattern in a surface of the elastic layer, wherein the spherical resin particles are arranged in a plane direction in the surface of the elastic layer, and wherein the intermediate transfer belt has glossiness of 35% or higher as determined based on reflected light at 85° on the surface of the intermediate transfer belt.
    Type: Application
    Filed: February 2, 2012
    Publication date: August 9, 2012
    Applicant: RICOH COMPANY, LTD
    Inventors: Kenichi MASHIKO, Jun Aoto, Hidetaka Kubo, Sayaka Katoh, Shinichi Nitta
  • Patent number: 8224224
    Abstract: A cleaning blade for removing fine particles from a cleaning target by contact with the cleaning target, a method of using the cleaning blade, and an image forming apparatus and process cartridge using the cleaning blade. The cleaning blade includes an elastic blade. A leading edge of the elastic blade includes a friction coefficient of 0.5 or less. The cleaning blade also includes a surface layer that covers the leading edge of the elastic blade. A thickness of the surface layer is between 1 to 50 ?m at a position 50 ?m away from the leading edge, and a hardness of the surface layer is greater hardness than the elastic blade.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: July 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Masahiro Ohmori, Yohta Sakon, Yasuyuki Yamashita, Masanobu Gondoh, Sayaka Katoh
  • Publication number: 20120082488
    Abstract: An intermediate transfer member including a base layer as first layer, an elastic layer as second layer, and a particle layer as third layer and containing fine spherical particles arranged in plane direction thereof where the particle layer has a concavo-convex pattern formed by the fine spherical particles, the elastic layer and the particle layer being formed on the base layer in this order, wherein the intermediate transfer member has a Martens hardness of 1.0 N/mm2 or lower and an elastic recovery rate of 75% or higher when the intermediate transfer member is indented at a load of 40 mN under conditions of 25° C. and 50% RH, wherein an embedment rate of the fine spherical particles in the elastic layer is 33% to 99%, and wherein the intermediate transfer member is configured to receive a toner image formed by developing, with a toner, a latent image on an image bearing member.
    Type: Application
    Filed: September 22, 2011
    Publication date: April 5, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hidetaka KUBO, Jun Aoto, Kenichi Mashiko, Shinichi Nitta, Sayaka Katoh
  • Publication number: 20110293824
    Abstract: To provide an intermediate transfer belt for use in an electrophotographic apparatus, including as an outermost surface thereof: uniform convex regions formed by aligning independent spherical resin particles in a surface direction; and depressed regions formed of a lubricant layer which respectively lie between the convex regions.
    Type: Application
    Filed: May 17, 2011
    Publication date: December 1, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Jun AOTO, Hidetaka Kubo, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta
  • Publication number: 20110177238
    Abstract: An intermediate transfer belt including a resin layer, which is a surface layer of the intermediate transfer belt, wherein the resin layer has a concavo-convex pattern formed by spherical resin particles which are independently embedded in the resin layer so that the embedment rate of the spherical resin particles in the thickness direction of the resin layer is higher than 50% but lower than 100%.
    Type: Application
    Filed: January 17, 2011
    Publication date: July 21, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Jun Aoto, Hidetaka Kubo, Kenichi Mashiko, Sayaka Katoh, Shinichi Nitta, Shigeo Oonuma
  • Publication number: 20090311017
    Abstract: A cleaning blade for removing fine particles from a cleaning target by contact with the cleaning target is provided. The cleaning blade includes an elastic blade A leading edge of the elastic blade includes a friction coefficient of 0.5 or less. The cleaning blade also includes a surface layer that covers the leading edge of the elastic blade. A thickness of the surface layer is between 1 to 50 ?m at a position 50 ?m away from the leading edge, and a hardness of the surface layer is greater hardness than the elastic blade.
    Type: Application
    Filed: June 12, 2009
    Publication date: December 17, 2009
    Inventors: Masahiro OHMORI, Yohta SAKON, Yasuyuki YAMASHITA, Masanobu GONDOH, Sayaka KATOH