Patents by Inventor Sadayuki Iwai

Sadayuki Iwai 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: 7962658
    Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: June 14, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuichiro Kanoshima, Sadayuki Iwai, Naoto Shiraishi, Hisao Shirasawa, Kazunari Tonami, Yoshinori Hayashi, Naoki Miyatake
  • Patent number: 7783209
    Abstract: An image forming apparatus includes an image carrying member, a development unit, a first driving unit, a second driving unit, and a cleaning blade. The image carrying member forms a latent image thereon. The development unit develops the latent image formed on the image carrying member. The first driving unit drives the image carrying member. The second driving unit drives the development unit. The cleaning blade, contactable against the image carrying member, removes materials including toner remaining on the image carrying member. When an agent-empty development unit is filled with a developing agent, the second driving unit is activated to start a driving of the development unit, and the first driving unit is activated to start a driving of the image carrying member after starting a developing agent filling operation to the development unit.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: August 24, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Mugijirou Uno, Sadayuki Iwai, Yuki Oshikawa
  • Patent number: 7715761
    Abstract: An image forming apparatus includes a plurality of toner-image forming units. Each toner-image forming unit includes a photosensitive drum and a charging unit that is arranged to abut against or remain detached from the photosensitive drum, and that electrically charges the photosensitive drum. Each of the toner-image forming units forms an image of a different color. At least one of the charging units functions as a corona charging unit and at least another one of the charging units functions as a non-contact charging unit.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: May 11, 2010
    Assignee: Ricoh Company, Limited
    Inventors: Junroh Uda, Sadayuki Iwai
  • Patent number: 7715760
    Abstract: A charging device including an electron discharging device for forming a latent electrostatic image on an image bearing member and containing an sp3 bonding material and an electroconductive portion.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: May 11, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Naomi Sugimoto, Yukimichi Someya, Sadayuki Iwai, Katsufumi Kumano, Eiichi Ohta
  • Patent number: 7711283
    Abstract: An image forming method and apparatus is disclosed. The method may include charging a rotating latent image bearing member with a rotating charger selected from at least one of contact chargers and short range chargers; irradiating the rotating latent image bearing member with imagewise light to form an electrostatic latent image on the latent image bearing member; developing the electrostatic latent image with a developer including a toner having a charge to form a toner image on the latent image bearing member; transferring the toner image onto a receiving material; and forming an electric field between the charger and the latent image bearing member after the toner image transferring such that charged materials present on the surface of the charger fly toward the latent image bearing member.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: May 4, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Sadayuki Iwai
  • Patent number: 7693466
    Abstract: A method of arranging a plurality of image forming sections, each of which includes a developing device and a cleaning device. The method includes arranging the plurality of image forming sections side by side along an inclined image carrier; and positioning the cleaning device above the developing device of other image forming sections in one of nearby ones of the plurality of image forming sections.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: April 6, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuaki Miyawaki, Takeshi Iijima, Yusuke Takeda, Shuji Hirai, Sadayuki Iwai, Hideki Kosugi, Makoto Obu
  • Publication number: 20090116872
    Abstract: A charging device including an electron discharging device for forming a latent electrostatic image on an image bearing member and containing an sp3 bonding material and an electroconductive portion.
    Type: Application
    Filed: April 19, 2006
    Publication date: May 7, 2009
    Inventors: Naomi Sugimoto, Yukimichi Someya, Sadayuki Iwai, Katsufumi Kumano, Eiichi Ohta
  • Publication number: 20090051942
    Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.
    Type: Application
    Filed: October 16, 2008
    Publication date: February 26, 2009
    Inventors: Yuichiro Kanoshima, Sadayuki Iwai, Naoto Shiraishi, Hisao Shirasawa, Kazunari Tonami, Yoshinori Hayashi, Naoki Miyatake
  • Publication number: 20080310865
    Abstract: An image forming apparatus includes an image carrying member, a development unit, a first driving unit, a second driving unit, and a cleaning blade. The image carrying member forms a latent image thereon. The development unit develops the latent image formed on the image carrying member. The first driving unit drives the image carrying member. The second driving unit drives the development unit. The cleaning blade, contactable against the image carrying member, removes materials including toner remaining on the image carrying member. When an agent-empty development unit is filled with a developing agent, the second driving unit is activated to start a driving of the development unit, and the first driving unit is activated to start a driving of the image carrying member after starting a developing agent filling operation to the development unit.
    Type: Application
    Filed: June 13, 2008
    Publication date: December 18, 2008
    Inventors: Mugijirou UNO, Sadayuki Iwai, Yuki Oshikawa
  • Patent number: 7454528
    Abstract: An image output apparatus includes a receiving unit that receives first information from a first radio contact element that performs a close-range radio contact; an image processing unit that forms image data of an image to be output from the first information; and an image output unit that outputs the image to an output medium from the image data.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: November 18, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuichiro Kanoshima, Sadayuki Iwai, Naoto Shiraishi, Hisao Shirasawa, Kazunari Tonami, Yoshinori Hayashi, Naoki Miyatake
  • Publication number: 20080260438
    Abstract: An image forming apparatus includes a plurality of toner-image forming units. Each toner-image forming unit includes a photosensitive drum and a charging unit that is arranged to abut against or remain detached from the photosensitive drum, and that electrically charges the photosensitive drum. Each of the toner-image forming units forms an image of a different color. At least one of the charging units functions as a corona charging unit and at least another one of the charging units functions as a non-contact charging unit.
    Type: Application
    Filed: September 10, 2007
    Publication date: October 23, 2008
    Inventors: Junroh Uda, Sadayuki Iwai
  • Publication number: 20080212998
    Abstract: A method of arranging a plurality of image forming sections, each of which includes a developing device and a cleaning device. The method includes arranging the plurality of image forming sections side by side along an inclined image carrier; and positioning the cleaning device above the developing device of other image forming sections in one of nearby ones of the plurality of image forming sections.
    Type: Application
    Filed: February 5, 2008
    Publication date: September 4, 2008
    Inventors: Katsuaki MIYAWAKI, Takeshi IIJIMA, Yusuke TAKEDA, Shuji HIRAI, Sadayuki IWAI, Hideki KOSUGI, Makoto OBU
  • Patent number: 7343126
    Abstract: A tandem image forming device for an image forming apparatus of the present invention includes a plurality of image forming means arranged side by side along an intermediate image transfer belt. The image forming means each include a developing device and a cleaning device arranged around an image carrier. One of nearby image forming means has its cleaning device positioned above the developing device of the other image forming means, e.g., an agitating section forming part of the image forming means. This configuration insures smooth circulation of a developer and therefore obviates an irregular developer distribution while reducing the overall size of the image forming device.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: March 11, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuaki Miyawaki, Takeshi Iijima, Yusuke Takeda, Shuji Hirai, Sadayuki Iwai, Hideki Kosugi, Makoto Obu
  • Publication number: 20070140728
    Abstract: A tandem image forming device for an image forming apparatus of the present invention includes a plurality of image forming means arranged side by side along an intermediate image transfer belt. The image forming means each include a developing device and a cleaning device arranged around an image carrier. One of nearby image forming means has its cleaning device positioned above the developing device of the other image forming means, e.g., an agitating section forming part of the image forming means. This configuration insures smooth circulation of a developer and therefore obviates an irregular developer distribution while reducing the overall size of the image forming device.
    Type: Application
    Filed: February 23, 2007
    Publication date: June 21, 2007
    Inventors: Katsuaki MIYAWAKI, Takeshi Iijima, Yusuke Takeda, Shuji Hirai, Sadayuki Iwai, Hideki Kosugi, Makoto Obu
  • Patent number: 7203452
    Abstract: A tandem image forming device for an image forming apparatus of the present invention includes a plurality of image forming means arranged side by side along an intermediate image transfer belt. The image forming means each include a developing device and a cleaning device arranged around an image carrier. One of nearby image forming means has its cleaning device positioned above the developing device of the other image forming means, e.g., an agitating section forming part of the image forming means. This configuration insures smooth circulation of a developer and therefore obviates an irregular developer distribution while reducing the overall size of the image forming device.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: April 10, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuaki Miyawaki, Takeshi Iijima, Yusuke Takeda, Shuji Hirai, Sadayuki Iwai, Hideki Kosugi, Makoto Obu
  • Publication number: 20070003315
    Abstract: An image forming method including charging a rotating latent image bearing member with a rotating charger selected from the group consisting of contact chargers and short range chargers; irradiating the rotating latent image bearing member with imagewise light to form an electrostatic latent image on the latent image bearing member; developing the electrostatic latent image with a developer including a toner having a charge to form a toner image on the latent image bearing member; transferring the toner image onto a receiving material; and forming an electric field between the charger and the latent image bearing member after the toner image transferring such that charged materials present on the surface of the charger fly toward the latent image bearing member.
    Type: Application
    Filed: June 27, 2006
    Publication date: January 4, 2007
    Inventor: Sadayuki Iwai
  • Patent number: 7155152
    Abstract: A charge removing unit is provided in order to control the surface potential of an image bearing element by removing charge from a surface of the image bearing element before a toner image is transferred from the image bearing element to a transfer medium. Surface potential controlling units are provided upstream of a contact area between the image bearing element and the transfer medium in order to control the surface potential of the transfer medium so that a toner on the image bearing element does not shift to the transfer medium.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: December 26, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Sadayuki Iwai, Tomoko Takahashi, Ayako Iino, Yoshinori Nakagawa, Hideki Kosugi
  • Patent number: 7095972
    Abstract: A toner image transfer method for transferring a toner image formed on a latent image carrier onto a transfer image carrier. A reference running speed of the latent image carrier VA and a reference running speed of the transfer image carrier VB are set substantially as VA=VB=V. A relative speed ?V between the latent image carrier and the transfer image carrier is changed in vibration at a high speed to positive and negative sides around the reference running speed V, thereby to carry out an image transfer.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: August 22, 2006
    Assignee: Ricoh Company, Ltd.
    Inventor: Sadayuki Iwai
  • Publication number: 20060029783
    Abstract: An intermediate image transfer belt for an image forming apparatus of the present invention includes at least a surface layer and a base layer. To produce the belt, while a hollow, cylindrical mold included in a centrifugal molding machine is in rotation, thermosetting urethane rubber is fed into the mold and then cured to form the surface layer on the inside of the mold. Subsequently, thermosetting urethane resin is fed into the mold and then cured to form the base layer on the surface layer. The surface layer is elastic and can closely contact the surface of, e.g., a plain paper sheet lacking smoothness. The belt therefore insures desirable image transfer.
    Type: Application
    Filed: October 5, 2005
    Publication date: February 9, 2006
    Inventor: Sadayuki Iwai
  • Patent number: 6947682
    Abstract: An image forming apparatus of the present invention includes an image carrier on which a toner image is to be formed, and a sheet support member for conveying a sheet, carrying the toner image thereon, in cooperation with the image carrier. The image carrier and sheet support member are driven such that their surfaces move in the same direction, as seen at a contact position where the two surfaces face each other via the sheet. An electric field, forcing the toner image toward the image carrier, and an electric field, forcing it toward the sheet, are formed between the surface of the image carrier and that of the sheet at positions upstream and downstream, respectively, of the contact position in the direction of movement of the sheet.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: September 20, 2005
    Assignee: Ricoh Company Ltd.
    Inventors: Hideki Kosugi, Sadayuki Iwai, Tomoko Takahashi, Masako Yoshii, Ayako Iino