Patents by Inventor Hiroyoshi Maruyama
Hiroyoshi Maruyama 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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Publication number: 20040051918Abstract: In an image reading apparatus for reading an original image using a light source containing a plurality of color components, a control pulse for dimming the light source is generated by pulse-width modulation symmetrically with respect to a reference timing (for example, the central position in one storage time or the storage start timing) in one predetermined storage time of a line sensor.Type: ApplicationFiled: September 15, 2003Publication date: March 18, 2004Inventors: Hiroshi Sato, Hiroyoshi Maruyama, Ken Tanabe, Masashi Minami, Shigeo Yamagata, Mitsuru Kurita, Koji Arai, Tsutomu Utagawa, Koichi Ishimoto
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Patent number: 6661545Abstract: In an image reading apparatus for reading an original image using a light source containing a plurality of color components, a control pulse for dimming the light source is generated by pulse-width modulation symmetrically with respect to a reference timing (for example, the central position in one storage time or the storage start timing) in one predetermined storage time of a line sensor.Type: GrantFiled: May 26, 1999Date of Patent: December 9, 2003Assignee: Canon Kabushiki KaishaInventors: Hiroshi Sato, Hiroyoshi Maruyama, Ken Tanabe, Masashi Minami, Shigeo Yamagata, Mitsuru Kurita, Koji Arai, Tsutomu Utagawa, Koichi Ishimoto
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Publication number: 20030174369Abstract: In an image reading apparatus for reading an original image using a light source containing a plurality of color components, a control pulse for dimming the light source is generated by pulse-width modulation symmetrically with respect to a reference timing (for example, the central position in one storage time or the storage start timing) in one predetermined storage time of a line sensor.Type: ApplicationFiled: May 26, 1999Publication date: September 18, 2003Inventors: HIROSHI SATO, HIROYOSHI MARUYAMA, KEN TANABE, MASASHI MINAMI, SHIGEO YAMAGATA, MITSURU KURITA, KOJI ARAI, TSUTOMU UTAGAWA, KOICHI ISHIMOTO
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Patent number: 6391418Abstract: The present invention relates to a substrate for information recording media, which comprises aromatic polycarbonate resin composition comprising: 100 parts by weight of an aromatic polycarbonate resin having a viscosity-average molecular weight of 10,000 to 40,000, and 0.01 to 40 parts by weight of a biphenyl compound, a terphenyl compound or a mixture thereof.Type: GrantFiled: December 21, 1999Date of Patent: May 21, 2002Assignee: Mitsubishi Engineering-Plastics Corp.Inventors: Masaya Ueda, Hiroyoshi Maruyama
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Patent number: 6081688Abstract: A both-face automatic original feeding apparatus wherein a plurality of originals having images on their first and second surfaces are successively supplied from an original stacking portion to a predetermined position for reading an original, and each original is reversely rotated through a switch-back path after the first surface of the original passes through the predetermined position, thereby supplying the original to the predetermined position again to direct the second surface of the original to the predetermined position.Type: GrantFiled: September 8, 1997Date of Patent: June 27, 2000Assignee: Canon Kabushiki KaishaInventors: Tamotsu Okada, Hiroyoshi Maruyama, Yasumi Yoshida, Masahiko Yashiro, Kazuo Shishido, Noriaki Koyanagi
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Patent number: 5918876Abstract: The present invention relates to a sheet conveying apparatus with a pair convey rollers arranged upstream of a registration mechanism for correcting a skew-feed of a sheet in a sheet conveying direction that can be abutted against or separated from each other, or can be shifted in accordance with a length of the sheet in the sheet conveying direction. As the result, when the skew-feed of the sheet is corrected by the registration mechanism, a trailing end of the sheet is not restrained.Type: GrantFiled: November 7, 1997Date of Patent: July 6, 1999Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Masahiko Yashiro
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Patent number: 5807914Abstract: The present invention relates to a glass fiber-reinforced polycarbonate resin composition comprising:(A) 70 to 92% by weight of an aromatic polycarbonate resin;(B) 1 to 20% by weight of an aromatic polycarbonate oligomer;(C) 3 to 20% by weight of a glass fiber comprising a short glass fiber having a fiber length of not more than 140 .mu.m and a long glass fiber having a fiber length of more than 140 .mu.m; and(D) 0.5 to 15% by weight of a composite rubber-based graft copolymer,halogen content in said resin composition being not more than 0.5% by weight based on total weight of said resin composition.Type: GrantFiled: March 27, 1997Date of Patent: September 15, 1998Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Naoto Obayashi, Tooru Watanabe, Hiroyoshi Maruyama
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Patent number: 5752154Abstract: The present invention provides a sheet post-treatment apparatus for receiving a sheet material on which an image was formed by an image forming apparatus and for post-treating such sheet material and for sending the sheet material to a next post-treatment apparatus. A sheet receiving opening has the same height as a sheet sending opening.Type: GrantFiled: February 28, 1996Date of Patent: May 12, 1998Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Yuji Takahashi, Yoshikuni Toyama, Shinichi Tanada, Toshihiko Kusumoto, Masahiko Yashiro
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Patent number: 5726774Abstract: A document reading device for applying light to a document placed on platen glass so as to read an image formed on the document. The device is provided with a light-screen. The width of the light-screen can be changed according to the document size in such a way that it is also possible to change the amount of light which can pass through the light-screen from a light source to be applied to the platen glass. With this arrangement, a local temperature increase in the platen glass can be inhibited during sequential document-reading.Type: GrantFiled: June 7, 1995Date of Patent: March 10, 1998Assignee: Canon Kabushiki KaishaInventors: Kazuo Shishido, Hiroyoshi Maruyama
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Patent number: 5597153Abstract: The present invention provides an automatic original feed apparatus comprising an original stacking portion on which a plurality of originals can be rested, an introduction path for directing the original supplied from the original stacking portion to a reading portion, an annular reverse rotation path for reversely rotating the original discharged from the reading position and for directing the original to the reading position again, a discharge path for discharging the original discharged from the reading position onto a discharge portion, and original feed rotary members arranged in the introduction path, reverse rotation path and discharge path, respectively, and rotated in one direction.Type: GrantFiled: September 22, 1995Date of Patent: January 28, 1997Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Yuji Takahashi, Yoshikuni Toyama, Shinichi Tanada, Toshihiko Kusumoto, Masahiko Yashiro
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Patent number: 5492315Abstract: The present invention provides a sheet post-treatment apparatus in which a tab sheet is used to sort sheet materials, comprising a tab trimmer for successively cutting each of plural tab forming sheet materials being supplied, to form tabs in the sheet materials at offset tab positions. The tab trimmer is in modular form which can be removed from the apparatus and replaced with another modular tab trimmer.Type: GrantFiled: February 3, 1994Date of Patent: February 20, 1996Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Yuji Takahashi, Yoshikuni Toyama, Shinichi Tanada, Toshihiko Kusumoto, Masahiko Yashiro
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Patent number: 5473421Abstract: A multicolor image forming apparatus for forming a multicolor image on a transfer material includes a mechanism, in which when forming a plurality of color toner images on a single electrostatic-latent-image bearing member performing endless movement, deviation is not produced between the respective color toner images. The distance between first and second latent-image forming portions on the electrostatic-latent-image bearing member is arranged to equal an integer multiple of the moving distance of the electrostatic-latent-image bearing member caused by a single revolution of a driving roller for driving the member.Type: GrantFiled: March 15, 1994Date of Patent: December 5, 1995Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Masahiko Yashiro
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Patent number: 5364088Abstract: A paper tray for a photocopier comprises a container (1) which can travel between open (E) and closed (L) positions. It moves along guides (22, 24). A drive mechanism (32) move the container from the closed to the open position by exerting a constant force on the container. The container is mounted on a carriage (20). This is supported by a pair of transport rollers (28) which roll along the guides. The rollers (28) are firmly connected together for rotation by a shaft (30).A locking mechanism is provided for the container. A lever (54) is rotatable on the photocopier to lock the container in the closed position. The lever is coupled to a slide (60) having a cam groove (65) therein. This is arranged to move a locking element (55) which engages the lever (54) so as to release the lever (54) as the container is pushed further into the photocopier in the closed position.Type: GrantFiled: January 29, 1993Date of Patent: November 15, 1994Assignees: Olivetti-Canon Industriale S.p.A., Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Luigi Dantonia, Felice Giacometto
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Patent number: 5329342Abstract: An image fixing apparatus includes a rotatable member for being heated by a heating source to fix an image on an image supporting member, first and second detecting elements responsive to temperature of the rotatable member, and wherein the first and second detecting elements are disposed on substantially the same circumferential line of the rotatable member.Type: GrantFiled: May 24, 1993Date of Patent: July 12, 1994Assignee: Canon Kabushiki KaishaInventors: Masanari Shirai, Kazuo Kagiura, Hiroyoshi Maruyama, Masashi Ohashi, Tatsuya Shiratori, Naomasa Kimura, Yoshikuni Toyama
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Patent number: 5303004Abstract: A driving mechanism for driving an electrophotographic photosensitive body operates through a torque limiter. The torque limiter is arranged on a support shaft for supporting the photosensitive body. A driving gear for driving a developing member is arranged coaxially with the torque limiter independently of the latter. This arrangement reduces the load applied to the torque limiter. In addition, the mechanism remains compact.Type: GrantFiled: September 14, 1992Date of Patent: April 12, 1994Assignee: Canon Kabushiki KaishaInventors: Hiroyoshi Maruyama, Kazuo Kagiura, Tatsuya Shiratori, Naomasa Kimura, Eiichi Ando, Masanari Shirai, Yoshikuni Toyama, Masashi Ohashi
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Patent number: 5191377Abstract: An original scanning apparatus comrpises a scanning unit for scanning an original. The scanning unit has a mirror and a light source for illuminating the original. A connecting member is electrically connected to the scanning unit. A guide member supports and guides one end of the scanning unit. The guide member fixes a position of the one end of the scanning unit in a vertical direction. At least a part of a driving element is disposed at the position overlapping with the guide member in the vertical direction, but not overlapping with the mirror of the scanning unit. The connecting member is provided at the side of the guide member.Type: GrantFiled: October 1, 1991Date of Patent: March 2, 1993Assignee: Canon Kabushiki KaishaInventors: Kazuo Kagiura, Tatsuya Shiratori, Naomasa Kimura, Eiichi Ando, Masanari Shirai, Yoshikuni Toyama, Hiroyoshi Maruyama, Masashi Ohashi
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Patent number: 5099283Abstract: An electrophotographic apparatus wherein a blank is formed at an end of a transfer material to make it easier to separate the transfer material from a photosensitive member and to prevent the transfer material from wrapping around an image fixing roller. A light reflecting portion is formed at a position corresponding to a leading edge of an original on an original supporting platen. The light reflecting portion receives light from an original illuminating lamp and reflects it to the region of the photosensitive member that has been opposed to a charger when the charge is switched from its non-operative state to an operative state.Type: GrantFiled: November 22, 1988Date of Patent: March 24, 1992Assignee: Canon Kabushiki KaishaInventor: Hiroyoshi Maruyama
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Patent number: 5023658Abstract: The present invention relates to an image forming apparatus in which a sheet cassette for containing sheets is removably mounted to a body of the apparatus. The image forming apparatus comprises a frame structure having a pair of legs spaced apart from each other, a bottom plate arranged on the legs, a first side plate arranged at one ends of the legs and uprightly mounted on the bottom plate, a second side plate arranged in confronting relation to the first side plate at the other ends of the legs and having a lower end portion extending below the legs and covering the other ends of the legs, and stay members for interconnecting the first and second side plates at their upper portions.Type: GrantFiled: July 20, 1990Date of Patent: June 11, 1991Assignee: Canon Kabushiki KaishaInventors: Yoshikuni Toyama, Kazuo Kagiura, Hiroyoshi Maruyama, Tatsuya Shiratori, Masashi Ohashi, Masanari Shirai, Eiichi Ando
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Patent number: 4995601Abstract: A sheet feeding device for use in an image forming apparatus provided with a sheet support plate and one or more rotary members for separating and feeding sheets. A recessed portion is formed on the sheet support plate in a position opposing to each rotary member. A detachable auxiliary member is provided to be fitted in the recess to form a plane coplanar with that of the sheet support plate. An engaging device can be provided, to engage with a step portion formed in a cassette housing portion of the apparatus to keep the cassette from being entirely removed from the housing. The engaging device may, for example, include an elastic part and an engaging part integrally molded with each other.Type: GrantFiled: December 22, 1988Date of Patent: February 26, 1991Assignee: Canon Kabushiki KaishaInventors: Masashi Ohashi, Yoshikuni Toyama, Kazuo Kagiura, Hiroyoshi Maruyama, Tatsuya Shiratori, Masanari Shirai, Eiichi Ando
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Patent number: 4896193Abstract: An image forming apparatus comprising a first body and a second body which are openable or separable from each other. The apparatus contains a plurality of developing devices, each of which is movable between its developing position for developing a latent image on an image bearing member of the image forming apparatus and a retracted position where the developing device is retracted from the developing position. At least the developing device that is located at its developing position when the apparatus is closed, is moved away from the image bearing member in response to an operation for opening the second body relative to the first body.Type: GrantFiled: April 3, 1989Date of Patent: January 23, 1990Assignee: Canon Kabushiki KaishaInventors: Kazuo Kagiura, Noriyuki Yokoo, Mototada Toriumi, Hiroyoshi Maruyama, Hidetoshi Tanaka, Yoichi Ishii