Patents by Inventor Atsuhiko Ogawa

Atsuhiko Ogawa 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: 8508808
    Abstract: An optical scanning apparatus has: a deflection unit that scans beams emitted from a plurality of laser light sources; an imaging unit having one or more optical elements for imaging beams scanned by the deflection unit; and a supporting unit having a higher rigidity than a rigidity of the imaging unit. The supporting unit has a pair of receiving members that support the imaging unit, in a sub-scanning direction, near both ends, as seen in a main scanning direction, of the imaging unit. The optical scanning apparatus also has; a bend-adjustment unit that corrects bend. The bend-adjustment unit is disposed on the supporting unit at a plurality of positions along the main scanning direction. The optical scanning apparatus further has a free-sliding unit for securing free expansion of the imaging unit due to temperature changes thereof.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: August 13, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenichi Shimizu, Atsuhiko Ogawa
  • Patent number: 8174747
    Abstract: An optical scanning apparatus for scanning a surface to be scanned includes: a light source that emits laser beam; a deflector that deflects the laser beam emitted from the light source; a plurality of optical scanning elements that introduce the deflected laser beam to the surface to be scanned; a housing that holds therein at least one of the light source, the deflector, and the scanning optical elements; a light receiving element that receives the deflected laser beam; a mirror that introduces the deflected laser beam to the light receiving element; and a holder that is provided on the housing and that holds the light receiving element and the mirror integrally.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: May 8, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Taku Amada, Atsuhiko Ogawa
  • Patent number: 7764912
    Abstract: A developer amount regulation blade structure that effectively reduces assembly cost and improves image quality configured to form a layer of a developer on a developer bearer includes a regulation blade configured to regulate a thickness of the developer on the developer bearer, a first supporting member configured to support the regulation blade maintaining a gap between the regulation blade and the developer bearer, and a second supporting member configured to sandwich the regulation blade tightly with the first supporting member, wherein at least one of the first supporting member and the second supporting member is made of a plastically deformable material, and the second supporting member and the first supporting member sandwich the regulation blade by at least two plastically deformed portions separated from each other in a longitudinal direction of the first supporting member and connecting the first supporting member and the second supporting member.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: July 27, 2010
    Assignee: Ricoh Company Ltd.
    Inventors: Takafumi Kondo, Atsuhiko Ogawa
  • Publication number: 20090323147
    Abstract: An optical scanning apparatus for scanning a surface to be scanned includes: a light source that emits laser beam; a deflector that deflects the laser beam emitted from the light source; a plurality of optical scanning elements that introduce the deflected laser beam to the surface to be scanned; a housing that holds therein at least one of the light source, the deflector, and the scanning optical elements; a light receiving element that receives the deflected laser beam; a mirror that introduces the deflected laser beam to the light receiving element; and a holder that is provided on the housing and that holds the light receiving element and the mirror integrally.
    Type: Application
    Filed: June 24, 2009
    Publication date: December 31, 2009
    Inventors: TAKU AMADA, Atsuhiko Ogawa
  • Publication number: 20090219582
    Abstract: An optical scanning apparatus has: a deflection unit that scans beams emitted from a plurality of laser light sources; an imaging unit having one or more optical elements for imaging beams scanned by the deflection unit; and a supporting unit having a higher rigidity than a rigidity of the imaging unit. The supporting unit has a pair of receiving members that support the imaging unit, in a sub-scanning direction, near both ends, as seen in a main scanning direction, of the imaging unit. The optical scanning apparatus also has; a bend-adjustment unit that corrects bend. The bend-adjustment unit is disposed on the supporting unit at a plurality of positions along the main scanning direction. The optical scanning apparatus further has a free-sliding unit for securing free expansion of the imaging unit due to temperature changes thereof.
    Type: Application
    Filed: February 19, 2009
    Publication date: September 3, 2009
    Inventors: Kenichi Shimizu, Atsuhiko Ogawa
  • Publication number: 20080063439
    Abstract: A developer amount regulation blade structure that effectively reduces assembly cost and improves image quality configured to form a layer of a developer on a developer bearer includes a regulation blade configured to regulate a thickness of the developer on the developer bearer, a first supporting member configured to support the regulation blade maintaining a gap between the regulation blade and the developer bearer, and a second supporting member configured to sandwich the regulation blade tightly with the first supporting member, wherein at least one of the first supporting member and the second supporting member is made of a plastically deformable material, and the second supporting member and the first supporting member sandwich the regulation blade by at least two plastically deformed portions separated from each other in a longitudinal direction of the first supporting member and connecting the first supporting member and the second supporting member.
    Type: Application
    Filed: September 7, 2007
    Publication date: March 13, 2008
    Inventors: Takafumi KONDO, Atsuhiko Ogawa