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).
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Patent number: 9618872Abstract: 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: GrantFiled: December 22, 2014Date of Patent: April 11, 2017Assignee: Canon Kabushiki KaishaInventors: Shinichiro Hosoi, Toshiharu Mamiya, Hiroshi Nakahata, Yasuaki Otoguro, Yuta Okada
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Publication number: 20170064108Abstract: 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: ApplicationFiled: August 23, 2016Publication date: March 2, 2017Inventors: Toshiharu Mamiya, Hiroshi Nakahata, Shinichiro Hosoi, Yuta Okada
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Patent number: 9389533Abstract: 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: GrantFiled: April 17, 2015Date of Patent: July 12, 2016Assignee: CANON KABUSHIKI KAISHAInventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi
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Publication number: 20150301471Abstract: 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: ApplicationFiled: April 17, 2015Publication date: October 22, 2015Inventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi
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Publication number: 20150301472Abstract: 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: ApplicationFiled: December 22, 2014Publication date: October 22, 2015Inventors: Shinichiro Hosoi, Toshiharu Mamiya, Hiroshi Nakahata, Yasuaki Otoguro, Yuta Okada
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Patent number: 8917305Abstract: 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: GrantFiled: April 10, 2013Date of Patent: December 23, 2014Assignee: Canon Kabushiki KaishaInventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi, Yasutomo Furuta
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Patent number: 8810622Abstract: 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: GrantFiled: April 19, 2013Date of Patent: August 19, 2014Assignee: Canon Kabushiki KaishaInventors: Toshiharu Mamiya, Hiroshi Nakahata, Yuta Okada, Shinichiro Hosoi
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Publication number: 20130286143Abstract: 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: ApplicationFiled: April 10, 2013Publication date: October 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hiroshi Nakahata, Toshiharu Mamiya, Yuta Okada, Shinichiro Hosoi, Yasutomo Furuta
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Publication number: 20130286145Abstract: 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: ApplicationFiled: April 19, 2013Publication date: October 31, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Toshiharu Mamiya, Hiroshi Nakahata, Yuta Okada, Shinichiro Hosoi
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Patent number: 8031221Abstract: 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: GrantFiled: January 11, 2008Date of Patent: October 4, 2011Assignee: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Patent number: 7830545Abstract: 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: GrantFiled: June 2, 2006Date of Patent: November 9, 2010Assignee: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Patent number: 7760228Abstract: 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: GrantFiled: May 24, 2007Date of Patent: July 20, 2010Assignee: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Publication number: 20080170276Abstract: 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: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: CANON KABUSHIKI KAISHAInventor: Toshiharu Mamiya
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Publication number: 20070273748Abstract: 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: ApplicationFiled: May 24, 2007Publication date: November 29, 2007Applicant: CANON KABUSHIKI KAISHAInventor: Toshiharu Mamiya
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Publication number: 20060285170Abstract: 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: ApplicationFiled: June 2, 2006Publication date: December 21, 2006Applicant: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Patent number: 5293242Abstract: 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: GrantFiled: September 30, 1991Date of Patent: March 8, 1994Assignee: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Patent number: 5019840Abstract: 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: GrantFiled: May 14, 1990Date of Patent: May 28, 1991Assignee: Canon Kabushiki KaishaInventors: Yoshitaka Watanabe, Toshiharu Mamiya, Tadashi Ishikawa, Takashi Endo, Jiro Moriyama
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Patent number: 4876558Abstract: 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: GrantFiled: July 25, 1988Date of Patent: October 24, 1989Assignee: Canon Kabushiki KaishaInventor: Toshiharu Mamiya
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Patent number: 4772899Abstract: 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: GrantFiled: August 21, 1986Date of Patent: September 20, 1988Assignee: Canon Kabushiki KaishaInventors: Toshiharu Mamiya, Yoshitaka Watanabe, Tadashi Ishikawa, Takashi Endo
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Patent number: 4698650Abstract: 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: GrantFiled: March 25, 1985Date of Patent: October 6, 1987Assignee: Canon Kabushiki KaishaInventors: Yoshitaka Watanabe, Toshiharu Mamiya, Tadashi Ishikawa, Takashi Endo