Patents by Inventor Toshiharu Mamiya

Toshiharu Mamiya 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: 9618872
    Abstract: During an operation of assembling a cover on an optical box, a cover-side engaging portion comes into contact with a side wall of the optical box and hence is deformed. An optical scanning apparatus is configured so that a distal end portion of a protrusion and an apex portion of a side wall of an optical box pass each other prior to a distal end portion of a cover-side engaging portion.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: April 11, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichiro Hosoi, Toshiharu Mamiya, Hiroshi Nakahata, Yasuaki Otoguro, Yuta Okada
  • Publication number: 20170064108
    Abstract: A light scanning apparatus, including: a first division unit configured to divide light emitted from a light source into a first and a second light beams; a deflection unit configured to deflect the first and second light beams to scan a first and a second scanned surfaces; a detection unit configured to detect the second light beam; a control unit configured to control, based on a detection result of the second light beam detected by the detection unit, a timing of the first light beam and a timing of the second light beam; and a second division unit configured to divide the first light beam into a third light beam and a fourth light beam and to guide the fourth light beam to the detection unit to control light intensity of the light source based on a detection result of the fourth light beam detected by the detection unit.
    Type: Application
    Filed: August 23, 2016
    Publication date: March 2, 2017
    Inventors: Toshiharu Mamiya, Hiroshi Nakahata, Shinichiro Hosoi, Yuta Okada
  • Patent number: 9389533
    Abstract: An image forming apparatus capable of controlling an image forming position with high accuracy. The image forming apparatus has a plurality of image forming sections each including a photosensitive drum and a laser scanner. The laser scanner exposes the photosensitive drum to form an electrostatic latent image thereon. The image forming section develops the electrostatic latent image formed on the photosensitive drum to form a toner image, and the toner image is transferred onto an intermediate transfer belt. A thermistor in the laser scanner detects the internal temperature of the laser scanner. The image forming apparatus controls the image forming sections to form detection patterns on the intermediate transfer belt. An image forming position is corrected based on the temperature detected by the thermistor and a result of measurement of the detection patterns.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: July 12, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi
  • Publication number: 20150301472
    Abstract: During an operation of assembling a cover on an optical box, a cover-side engaging portion comes into contact with a side wall of the optical box and hence is deformed. An optical scanning apparatus is configured so that a distal end portion of a protrusion and an apex portion of a side wall of an optical box pass each other prior to a distal end portion of a cover-side engaging portion.
    Type: Application
    Filed: December 22, 2014
    Publication date: October 22, 2015
    Inventors: Shinichiro Hosoi, Toshiharu Mamiya, Hiroshi Nakahata, Yasuaki Otoguro, Yuta Okada
  • Publication number: 20150301471
    Abstract: An image forming apparatus capable of controlling an image forming position with high accuracy. The image forming apparatus has a plurality of image forming sections each including a photosensitive drum and a laser scanner. The laser scanner exposes the photosensitive drum to form an electrostatic latent image thereon. The image forming section develops the electrostatic latent image formed on the photosensitive drum to form a toner image, and the toner image is transferred onto an intermediate transfer belt. A thermistor in the laser scanner detects the internal temperature of the laser scanner. The image forming apparatus controls the image forming sections to form detection patterns on the intermediate transfer belt. An image forming position is corrected based on the temperature detected by the thermistor and a result of measurement of the detection patterns.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 22, 2015
    Inventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi
  • Patent number: 8917305
    Abstract: A resin BD lens having a property of refracting a light beam in a direction corresponding to a main scanning direction may cause a variation in generation timing difference among a plurality of horizontal synchronization signals and accordingly degrade accuracy to correct the starting position of an electrostatic latent image. The present invention uses a glass BD lens having a property of refracting a light beam in a direction corresponding to the main scanning direction.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: December 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi, Yasutomo Furuta
  • Patent number: 8810622
    Abstract: A light scanning apparatus, including: a light source configured to emit a light beam; a beam splitter configured to split the light beam into a first and a second light beams; a rotary polygon mirror configured to deflect the first light beam to scan a photosensitive member; a motor configured to rotate the rotary polygon mirror; a first lens configured to guide the first light beam to the photosensitive member; an optical sensor configured to receive the second light beam; a second lens configured to condense the second light beam on the optical sensor; and an optical box has a wall standing from a bottom surface between a region in which the rotary polygon mirror and the motor are disposed and a region in which the second lens is disposed, and a height of the wall from the bottom surface is higher than a height of the rotary polygon mirror.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: August 19, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiharu Mamiya, Hiroshi Nakahata, Yuta Okada, Shinichiro Hosoi
  • Publication number: 20130286145
    Abstract: A light scanning apparatus, including: a light source configured to emit a light beam; a beam splitter configured to split the light beam into a first and a second light beams; a rotary polygon mirror configured to deflect the first light beam to scan a photosensitive member; a motor configured to rotate the rotary polygon mirror; a first lens configured to guide the first light beam to the photosensitive member; an optical sensor configured to receive the second light beam; a second lens configured to condense the second light beam on the optical sensor; and an optical box has a wall standing from a bottom surface between a region in which the rotary polygon mirror and the motor are disposed and a region in which the second lens is disposed, and a height of the wall from the bottom surface is higher than a height of the rotary polygon mirror.
    Type: Application
    Filed: April 19, 2013
    Publication date: October 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Toshiharu Mamiya, Hiroshi Nakahata, Yuta Okada, Shinichiro Hosoi
  • Publication number: 20130286143
    Abstract: A resin BD lens having a property of refracting a light beam in a direction corresponding to a main scanning direction may cause a variation in generation timing difference among a plurality of horizontal synchronization signals and accordingly degrade accuracy to correct the starting position of an electrostatic latent image. The present invention uses a glass BD lens having a property of refracting a light beam in a direction corresponding to the main scanning direction.
    Type: Application
    Filed: April 10, 2013
    Publication date: October 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi, Yasutomo Furuta
  • Patent number: 8031221
    Abstract: In an image forming apparatus including a main assembly and a scanning optical apparatus which is inserted into the main assembly of the image forming apparatus in a substantially horizontal direction and is mounted to the apparatus main assembly, in order to fix the scanning optical apparatus to the apparatus main assembly in a state in which the scanning optical apparatus is inserted at a predetermined insertion position of the apparatus main assembly, a leaf spring member for urging an end of the scanning optical apparatus with respect to an insertion direction of the scanning optical apparatus is provided on the main assembly of the image forming apparatus or the scanning optical apparatus and a cushioning member press-contacting the leaf spring member between the main assembly of the image forming apparatus and the scanning optical apparatus is provided.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: October 4, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Patent number: 7830545
    Abstract: At least one exemplary embodiment is directed to an optical unit adapted to irradiate image exposure light to an image carrier comprises a frame containing optical parts arranged therein and having an opening, and a cover adapted to cover the opening. The cover can be fixed by fixing members to the frame at three points in a first plane including the opening. The cover can further be fixed by fixing members to the frame at a second plane positioned on the frame and being adjacent to the first plane and at a third plane positioned on the frame and being not parallel to the second plane. Thus, an optical unit can be obtained which has high rigidity while, when the cover is attached to the opening, maintaining satisfactory flatness of the cover in a plane including the opening.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: November 9, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Patent number: 7760228
    Abstract: A light scanning apparatus has a base member, a first engagement portion that engages with a bearing member having a bearing portion of a rotary shaft that rotates a rotational polygon mirror to thereby position the bearing member, a second engagement portion that engages with a bearing member having a bearing portion of a rotary shaft that rotates a rotational polygon mirror to thereby position the bearing member, and a positioning portion in which the first engagement portion and the second engagement portion are integrally formed, the positioning portion being provided on the base member. With this structure, a common base member can be used in optical units, and even when rotational polygon mirrors are supported on different surfaces of the base members of optical units, a difference in precision of support can be made small.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: July 20, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Publication number: 20080170276
    Abstract: In an image forming apparatus including a main assembly and a scanning optical apparatus which is inserted into the main assembly of the image forming apparatus in a substantially horizontal direction and is mounted to the apparatus main assembly, in order to fix the scanning optical apparatus to the apparatus main assembly in a state in which the scanning optical apparatus is inserted at a predetermined insertion position of the apparatus main assembly, a leaf spring member for urging an end of the scanning optical apparatus with respect to an insertion direction of the scanning optical apparatus is provided on the main assembly of the image forming apparatus or the scanning optical apparatus and a cushioning member press-contacting the leaf spring member between the main assembly of the image forming apparatus and the scanning optical apparatus is provided.
    Type: Application
    Filed: January 11, 2008
    Publication date: July 17, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toshiharu Mamiya
  • Publication number: 20070273748
    Abstract: A light scanning apparatus has a base member, a first engagement portion that engages with a bearing member having a bearing portion of a rotary shaft that rotates a rotational polygon mirror to thereby position the bearing member, a second engagement portion that engages with a bearing member having a bearing portion of a rotary shaft that rotates a rotational polygon mirror to thereby position the bearing member, and a positioning portion in which the first engagement portion and the second engagement portion are integrally formed, the positioning portion being provided on the base member. With this structure, a common base member can be used in optical units, and even when rotational polygon mirrors are supported on different surfaces of the base members of optical units, a difference in precision of support can be made small.
    Type: Application
    Filed: May 24, 2007
    Publication date: November 29, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toshiharu Mamiya
  • Publication number: 20060285170
    Abstract: At least one exemplary embodiment is directed to an optical unit adapted to irradiate image exposure light to an image carrier comprises a frame containing optical parts arranged therein and having an opening, and a cover adapted to cover the opening. The cover can be fixed by fixing members to the frame at three points in a first plane including the opening. The cover can further be fixed by fixing members to the frame at a second plane positioned on the frame and being adjacent to the first plane and at a third plane positioned on the frame and being not parallel to the second plane. Thus, an optical unit can be obtained which has high rigidity while, when the cover is attached to the opening, maintaining satisfactory flatness of the cover in a plane including the opening.
    Type: Application
    Filed: June 2, 2006
    Publication date: December 21, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Patent number: 5293242
    Abstract: A photographing device includes a camera mounting unit on which a camera is detachably mounted, a light source unit arranged at a predetermined distance from the camera mounting unit, and a table which is arranged between the light source unit and the camera mounting unit, and on which an object is placed. The object placed on the table is illuminated by the light source unit, and can be photographed by the camera.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: March 8, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Patent number: 5019840
    Abstract: A recording apparatus includes: a recording unit for performing a recording onto a recording paper; a paper feeder roller for feeding the recording paper to a recording position of the recording unit; a conveyor for conveying the recording paper in association with the recording by the recording unit; a drive source for driving the conveyor; and a control unit for moving the paper feeder roller from an operation position to a retreat position using the drive power of the drive source.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: May 28, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Watanabe, Toshiharu Mamiya, Tadashi Ishikawa, Takashi Endo, Jiro Moriyama
  • Patent number: 4876558
    Abstract: In a pump device wherein a piston is reciprocally moved in a predetermined range within a cylinder to thereby produce pressure, a liquid inflow hole is provided outside the predetermined range of the cylinder and a hermetically sealing member biased so as to hermetically seal the liquid inflow hole until the piston is moved by a predetermined amount is provided.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: October 24, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiharu Mamiya
  • Patent number: 4772899
    Abstract: A scanning mechanism for a recording apparatus having a carriage for scanning with a bearing portion at which the carriage is engaged on a guide shaft, whereby a dynamic pressure bearing is used in the above-defined bearing portion, and a lubricant supply member is provided on the guide shaft in a position at which the carriage arrives selectively.
    Type: Grant
    Filed: August 21, 1986
    Date of Patent: September 20, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiharu Mamiya, Yoshitaka Watanabe, Tadashi Ishikawa, Takashi Endo
  • Patent number: 4698650
    Abstract: An ink jet recording apparatus with improved operational performance and compactness has a mounting section for a recording paper cassette, a mounting section for an ink cartridge, and an accommodating section for a printed recording paper each have an opening at the same side of the apparatus. Preferably, an operation section for use in operating the apparatus and a display section for displaying the operation state of the apparatus are also disposed at the above same side.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: October 6, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Watanabe, Toshiharu Mamiya, Tadashi Ishikawa, Takashi Endo