Patents by Inventor Hiroshi Doshohda

Hiroshi Doshohda 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: 7973291
    Abstract: An electronic apparatus of the present invention includes an ion generator which generates ions in an atmosphere to remove chemical emission such as VOC and odor. The ion generator is arranged inside the duct which leads the chemical emission generated from the fixing unit to the discharge opening, and also generates positive ions and negative ions in the atmosphere, thereby can efficiently remove the chemical emission. With this arrangement, an electronic apparatus is realized which sufficiently suppresses the chemical emission such as VOC and odor, and is less likely to dirty the surroundings of the electronic apparatus such as the outer surface thereof and the walls surrounding the electronic apparatus.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: July 5, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshiaki Kagawa, Hiroshi Doshohda
  • Patent number: 7826763
    Abstract: A color laser printer is provided with a first exhaust duct for exhausting ozone generated by a charging unit etc. inside a housing to the outside of the housing. The first exhaust duct is therein provided with a catalytic honeycomb filter for ozone gas treatment and an ion emitting unit for emitting negative ions into an atmosphere. Most of an ozone gas component is decomposed and/or absorbed by the catalytic honeycomb filter for ozone gas treatment. Furthermore, the residual ozone gas component is decomposed by the negative ions generated by the ion emitting unit. This arrangement makes it possible to provide a new ozone removal device which is different from an ozone decomposing filter or a heat source.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: November 2, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Doshohda, Katsumi Adachi, Toshiaki Kagawa
  • Patent number: 7796903
    Abstract: A charging apparatus which is excellent in charging uniformity and thus allows a to-be-charged body to be charged uniformly and in which the generation of discharge products can be reduced, is provided. In the charging apparatus, ions are generated under the difference in electrical potential between the discharge electrode and the induction electrode produced in the ion generating section. The generated ions are caused to flow toward the counter electrode, whereupon the to-be-charged body arranged between the ion generating section and the counter electrode is charged.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: September 14, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshiaki Kagawa, Hiroshi Doshohda, Katsumi Adachi
  • Publication number: 20090003859
    Abstract: A charging apparatus which is excellent in charging uniformity and thus allows a to-be-charged body to be charged uniformly and in which the generation of discharge products can be reduced, is provided. In the charging apparatus, ions are generated under the difference in electrical potential between the discharge electrode and the induction electrode produced in the ion generating section. The generated ions are caused to flow toward the counter electrode, whereupon the to-be-charged body arranged between the ion generating section and the counter electrode is charged.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 1, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshiaki Kagawa, Hiroshi Doshohda, Katsumi Adachi
  • Publication number: 20080219695
    Abstract: A color laser printer is provided with a first exhaust duct for exhausting ozone generated by a charging unit etc. inside a housing to the outside of the housing. The first exhaust duct is therein provided with a catalytic honeycomb filter for ozone gas treatment and an ion emitting unit for emitting negative ions into an atmosphere. Most of an ozone gas component is decomposed and/or absorbed by the catalytic honeycomb filter for ozone gas treatment. Furthermore, the residual ozone gas component is decomposed by the negative ions generated by the ion emitting unit. This arrangement makes it possible to provide a new ozone removal device which is different from an ozone decomposing filter or a heat source.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 11, 2008
    Inventors: Hiroshi DOSHOHDA, Katsumi Adachi, Toshiaki Kagawa
  • Publication number: 20080217556
    Abstract: An electronic apparatus of the present invention includes an ion generator which generates ions in an atmosphere to remove chemical emission such as VOC and odor. The ion generator is arranged inside the duct which leads the chemical emission generated from the fixing unit to the discharge opening, and also generates positive ions and negative ions in the atmosphere, thereby can efficiently remove the chemical emission. With this arrangement, an electronic apparatus is realized which sufficiently suppresses the chemical emission such as VOC and odor, and is less likely to dirty the surroundings of the electronic apparatus such as the outer surface thereof and the walls surrounding the electronic apparatus.
    Type: Application
    Filed: March 4, 2008
    Publication date: September 11, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshiaki Kagawa, Hiroshi Doshohda