Patents by Inventor Hideo Yoshizawa

Hideo Yoshizawa 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: 8923726
    Abstract: A development device includes a development casing, a developer bearer disposed facing a latent image bearer through an opening formed in the development casing, a magnetic field generator, a developer regulator disposed facing the developer bearer, a first seal member to cover a clearance between the latent image bearer and a rim of the development casing upstream from the opening, and a second seal member. The first seal member includes a first end portion fixed to the rim of the development casing and a second end portion in contact with the latent image bearer, and the second seal member includes a first end portion fixed to an inner face of the development casing farther from the latent image bearer than the first seal member, and a second end portion hanging to contact the developer carried on the developer bearer downstream from the developer regulator.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: December 30, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kiyonori Tsuda, Hideo Yoshizawa, Kohichi Utsunomiya, Takuzi Yoneda, Yutaka Takahashi, Emi Kita, Yuki Oshikawa
  • Patent number: 8843015
    Abstract: An imaging device provided with a latent image carrying body rotatably disposed to carry a latent image, a developing unit that develops the latent image carried on the carrying body by using a developer containing toner at least, and a duct disposed downstream of the developing unit and having a wall with an upstream suction port and a downstream suction port formed. An air flow path is formed by a surface of the latent image carrying body and a surface of the duct wall, between the upstream suction port and the downstream suction port. A gap of the air flow path is wider at the downstream side than at the upstream side with respect to the rotational direction of the latent image carrying body.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: September 23, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Kohichi Utsunomiya, Kiyonori Tsuda, Hideo Yoshizawa, Takuzi Yoneda, Emi Kita, Yutaka Takahashi, Yuki Oshikawa
  • Patent number: 8843019
    Abstract: A development device includes a development casing, a developer bearer disposed facing a latent image bearer through an opening in the development casing to carry developer, a magnetic field generator disposed inside the developer bearer, a developer regulator extending in an axial direction of the developer bearer to adjust an amount of developer carried on the developer bearer, and a first axial end seal provided in an axial end portion of the development device outside an image range, in contact with an upstream face of the developer regulator to reduce a size of a clearance between the developer regulator and the development casing.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: September 23, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideo Yoshizawa, Kiyonori Tsuda, Takuzi Yoneda, Emi Kita, Yutaka Takahashi, Yuki Oshikawa, Kohichi Utsunomiya
  • Publication number: 20140270838
    Abstract: A developing device includes a developer bearer to carry developer, disposed facing an image bearer, a developer conveyance member disposed facing the developer bearer, to agitate and supply developer to the developer bearer, a decompression portion surrounded by upper walls of the developing device and including multiple vents arranged in a longitudinal direction of the developing device and a filter. A number of the multiple vents is greater in either end portion than in a center portion in the longitudinal direction of the developing device.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 18, 2014
    Inventors: Hideo Yoshizawa, Noriyuki Kimura, Yoshihiro Fujiwara, Yuki Oshikawa, Sohichi Abe
  • Publication number: 20120269544
    Abstract: A development device includes a development casing, a developer bearer disposed facing a latent image bearer through an opening formed in the development casing, a magnetic field generator, a developer regulator disposed facing the developer bearer, a first seal member to cover a clearance between the latent image bearer and a rim of the development casing upstream from the opening, and a second seal member. The first seal member includes a first end portion fixed to the rim of the development casing and a second end portion in contact with the latent image bearer, and the second seal member includes a first end portion fixed to an inner face of the development casing farther from the latent image bearer than the first seal member, and a second end portion hanging to contact the developer carried on the developer bearer downstream from the developer regulator.
    Type: Application
    Filed: March 26, 2012
    Publication date: October 25, 2012
    Inventors: Kiyonori TSUDA, Hideo YOSHIZAWA, Kohichi UTSUNOMIYA, Takuzi YONEDA, Yutaka TAKAHASHI, Emi KITA, Yuki OSHIKAWA
  • Publication number: 20120269553
    Abstract: A development device includes a development casing, a developer bearer disposed facing a latent image bearer through an opening in the development casing to carry developer, a magnetic field generator disposed inside the developer bearer, a developer regulator extending in an axial direction of the developer bearer to adjust an amount of developer carried on the developer bearer, and a first axial end seal provided in an axial end portion of the development device outside an image range, in contact with an upstream face of the developer regulator to reduce a size of a clearance between the developer regulator and the development casing.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 25, 2012
    Inventors: Hideo Yoshizawa, Kiyonori Tsuda, Takuzi Yoneda, Emi Kita, Yutaka Takahashi, Yuki Oshikawa, Kohichi Utsunomiya
  • Publication number: 20120237249
    Abstract: An imaging device provided with a latent image carrying body rotatably disposed to carry a latent image, a developing unit that develops the latent image carried on the carrying body by using a developer containing toner at least, and a duct disposed downstream of the developing unit and having a wall with an upstream suction port and a downstream suction port formed. An air flow path is formed by a surface of the latent image carrying body and a surface of the duct wall, between the upstream suction port and the downstream suction port. A gap of the air flow path is wider at the downstream side than at the upstream side with respect to the rotational direction of the latent image carrying body.
    Type: Application
    Filed: February 22, 2012
    Publication date: September 20, 2012
    Inventors: Kohichi UTSUNOMIYA, Kiyonori Tsuda, Hideo Yoshizawa, Takuzi Yoneda, Emi Kita, Yutaka Takahashi, Yuki Oshikawa
  • Publication number: 20120230738
    Abstract: A driving force transmission mechanism includes a connection for integrally rotating a driving shaft on the driving source side and a driven shaft of a rotary member. The connection includes a tubular boss portion; and a fitting shaft portion fitted into the tubular boss portion. An inner shaft portion is provided in a projecting manner from bottom center of the tubular boss portion toward inside the tubular boss portion. An inner recessed portion into which the inner shaft portion fits is provided in center of a leading edge plane for fitting of the fitting shaft portion. Micro gaps are provided between an inner surface of the tubular boss portion and an outer surface of the fitting shaft portion and between an inner surface of the inner recessed portion and an outer surface of the inner shaft portion.
    Type: Application
    Filed: February 16, 2012
    Publication date: September 13, 2012
    Inventors: Hideo YOSHIZAWA, Kiyonori Tsuda, Takuzi Yoneda, Yutaka Takahashi, Emi Kita, Yuki Oshikawa, Kohichi Utsunomiya
  • Patent number: 8244163
    Abstract: A toner container includes a container body that contains toner therein, and a cap portion that is held by a toner-container holding unit and includes a toner discharge opening to discharge the toner contained in the container body. A gear portion is detachably attached to the container body so that a rotational force is transmitted to the container body.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 14, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Hideo Yoshizawa, Tadashi Hayakawa, Masashi Hasegawa, Makoto Kawaguchi
  • Patent number: 8204402
    Abstract: A shutter mechanism is provided in a supply port through which powder is supplied to a second device from a first device. The shutter mechanism includes a shutter that opens and closes the supply port in conjunction with attaching and detaching operation of the second device with respect to the first device and a guide groove that is provided in a recess manner so as not to be exposed from the supply port as viewed from the second device and guides the opening and closing operation of the shutter. A space is formed between the guide groove and an end portion of the supply port making contact with the shutter when the shutter closes the supply port.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: June 19, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Hideo Yoshizawa, Yukinori Sakuma
  • Patent number: 8160461
    Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: April 17, 2012
    Assignee: Ricoh Co., Ltd.
    Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane
  • Patent number: 8126375
    Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: February 28, 2012
    Assignee: Ricoh Co., Ltd.
    Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
  • Publication number: 20110286771
    Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.
    Type: Application
    Filed: June 20, 2011
    Publication date: November 24, 2011
    Inventors: Nobuyuki TAGUCHI, Masayuki YAMANE, Hideo YOSHIZAWA, Takeroh KURENUMA, Takayuki TAMAKI, Seiji TERAZAWA, Masashi HASEGAWA, Fumie SATOH, Teruo HITOSUGI, Takashi HISAZUMI, Goro KATSUYAMA
  • Patent number: 8050597
    Abstract: A toner container includes a container body that contains toner therein, and a cap portion that is held by a toner-container holding unit and includes a toner discharge opening to discharge the toner contained in the container body. A gear portion is detachably attached to the container body so that a rotational force is transmitted to the container body.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: November 1, 2011
    Assignee: Ricoh Company, Limited
    Inventors: Hideo Yoshizawa, Tadashi Hayakawa, Masashi Hasegawa, Makoto Kawaguchi
  • Patent number: 7991334
    Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: August 2, 2011
    Assignee: Ricoh Co., Ltd.
    Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
  • Publication number: 20110109115
    Abstract: Disclosed is a terminal structure which has a high degree of freedom in selecting the mounting position. A terminal part (18) is affixed to a glass plate (11) with an adhesive (27). A conductive member (19) extends from the terminal part (18) too an object of power supply. The conductive member (19) is flexible.
    Type: Application
    Filed: June 30, 2009
    Publication date: May 12, 2011
    Inventors: Kazuo Yamada, Hideo Yoshizawa, Ichiro Okajima
  • Patent number: 7923084
    Abstract: An intermediate transfer member for use in an image forming apparatus in which a toner image is formed on a photoreceptor, firstly transferred from the photoreceptor to the intermediate transfer member, and further secondly transferred from the intermediate transfer member to a recording medium, the intermediate transfer member, includes an intermediate transfer belt containing a volatile substance in a range of from 10 to 10,000 ppm as an average concentration of an entire intermediate transfer belt thereof.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: April 12, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Kurachi, Hideaki Morita, Hideo Yoshizawa, Fumitaka Mochizuki
  • Patent number: 7918729
    Abstract: An image generation system includes a display control section which controls display of images displayed in a touch panel display and a display, a movement control section which controls movement of a moving object, a game calculation section which performs processing of calculating a game parameter which changes as a result of game play using the moving object, and a movement permission condition determination section which determines whether or not a condition for permitting movement of the moving object from a game field G1 to a game field G2 has been satisfied based on the game parameter which changes as a result of game play in the game field G1. The movement control section performs control of moving the moving object from the game field G1 to the game field G2 when the movement permission condition has been satisfied.
    Type: Grant
    Filed: September 29, 2005
    Date of Patent: April 5, 2011
    Assignee: Namco Bandai Games Inc.
    Inventors: Tetsuya Shinoda, Takeshi Ono, Hideo Yoshizawa
  • Publication number: 20110008075
    Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.
    Type: Application
    Filed: September 20, 2010
    Publication date: January 13, 2011
    Inventors: Nobuyuki TAGUCHI, Goro KATSUYAMA, Takeroh KURENUMA, Hideo YOSHIZAWA, Masayuki YAMANE
  • Patent number: D667047
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: September 11, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuki Oshikawa, Hideo Yoshizawa