Patents by Inventor Yasuhisa Ehara

Yasuhisa Ehara 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: 9772809
    Abstract: A printed matter delivery system, in which a printed matter delivery apparatus delivers printed matter having an image formed by an image forming apparatus is provided. The system includes a print management unit managing a print job performed by the image forming apparatus; a delivery management unit managing a delivery job performed by the printed matter delivery apparatus; a delivery authentication processing unit performing a matching confirmation process to determine whether authentication information of the delivery job matches authentication information of the print job; a print controlling unit causing the image forming apparatus to generate the printed matter based on the print job authenticated by the delivery authentication processing unit and to output the printed matter to the printed matter delivery apparatus; and a receipt confirmation unit obtaining receipt information input into the printed matter delivery apparatus at a delivery destination.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: September 26, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazunori Bannai, Yasuhisa Ehara, Katsunori Shoji, Daisuke Maeda, Yusuke Funayama, Keiichi Serizawa, Kazuhiro Takabayashi, Seiichi Handa
  • Publication number: 20160274840
    Abstract: A printed matter delivery system, in which a printed matter delivery apparatus delivers printed matter having an image formed by an image forming apparatus is provided. The system includes a print management unit managing a print job performed by the image forming apparatus; a delivery management unit managing a delivery job performed by the printed matter delivery apparatus; a delivery authentication processing unit performing a matching confirmation process to determine whether authentication information of the delivery job matches authentication information of the print job; a print controlling unit causing the image forming apparatus to generate the printed matter based on the print job authenticated by the delivery authentication processing unit and to output the printed matter to the printed matter delivery apparatus; and a receipt confirmation unit obtaining receipt information input into the printed matter delivery apparatus at a delivery destination.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 22, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Kazunori BANNAI, Yasuhisa EHARA, Katsunori SHOJI, Daisuke MAEDA, Yusuke FUNAYAMA, Keiichi SERIZAWA, Kazuhiro TAKABAYASHI, Seiichi HANDA
  • Patent number: 9121477
    Abstract: A driving device includes a drive source, a planetary gear decelerator, a drive-target shaft, a rotation speed detector, and a sensor mount. The planetary gear decelerator includes a planetary gear mechanism equipped with an output shaft, a sun gear, an outer gear, a plurality of planetary gears, and a rotatable first carrier. The outer gear is made of resin and includes a deformable portion at a drive target side, and the deformable portion is elastically deformable in a radial direction. The plurality of planetary gears engages the sun gear and the outer gear. The rotatable first carrier rotatably supports the planetary gears. The rotation speed detector detects a rotation speed of the planetary gear decelerator, and includes a sensor and a detection target disposed coaxially on the output shaft. The sensor mount supports the sensor and moves in the radial direction in accordance with elastic deformation of the outer gear.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: September 1, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yasuhiro Maehata, Yasuhisa Ehara, Hiromichi Matsuda, Katsuaki Miyawaki
  • Patent number: 8948679
    Abstract: A sheet conveyance device for conveying a recording medium includes a fixed roller, a movable roller, an urging member, and a shock absorber, and an image forming apparatus including the sheet conveyance device. The position of the fixed roller is fixed. The movable roller is disposed opposite the fixed roller to contact the fixed roller, thereby defining a nip. The urging member urges the movable member to contact the fixed roller in the absence of the recording medium in the nip and allows the movable member to separate from the fixed roller by an amount corresponding to a thickness of a recording medium when the recording medium enters the nip. The shock absorber absorbs displacement energy generated when the urging member urges the movable roller to contact the fixed roller again after the recording medium passes through the nip.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: February 3, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Murakami, Yasuhisa Ehara, Noriaki Funamoto, Tetsuji Nishikawa, Yasuhiro Maehata, Jun Yasuda, Satoshi Araaki
  • Publication number: 20140073476
    Abstract: A driving device includes a drive source, a planetary gear decelerator, a drive-target shaft, a rotation speed detector, and a sensor mount. The planetary gear decelerator includes a planetary gear mechanism equipped with an output shaft, a sun gear, an outer gear, a plurality of planetary gears, and a rotatable first carrier. The outer gear is made of resin and includes a deformable portion at a drive target side, and the deformable portion is elastically deformable in a radial direction. The plurality of planetary gears engages the sun gear and the outer gear. The rotatable first carrier rotatably supports the planetary gears. The rotation speed detector detects a rotation speed of the planetary gear decelerator, and includes a sensor and a detection target disposed coaxially on the output shaft. The sensor mount supports the sensor and moves in the radial direction in accordance with elastic deformation of the outer gear.
    Type: Application
    Filed: August 22, 2013
    Publication date: March 13, 2014
    Applicant: Ricoh Company, Ltd.
    Inventors: Yasuhiro MAEHATA, Yasuhisa EHARA, Hiromichi MATSUDA, Katsuaki MIYAWAKI
  • Patent number: 8447212
    Abstract: An image forming apparatus includes an endless belt member; a drive unit moving the endless belt member; a first detecting unit detecting a rotating speed of the drive unit; a second detecting unit detecting an endless transport speed of the endless belt member; and a control unit controlling the rotating speed of the drive unit based on a first detection signal from the first detecting unit or a second detection signal from the second detecting unit selectively depending on a selection condition. Upon selection of the first detection signal in accordance with the selection condition, the control unit corrects the rotating speed of the drive unit using the second detection signal such that an average value of the endless transport speed of the endless belt member approaches a target average value.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: May 21, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Noriaki Funamoto, Yasuhisa Ehara, Tetsuji Nishikawa, Yasuhiro Maehata, Jun Yasuda
  • Patent number: 8346111
    Abstract: A main controlling part is configured to choose and execute either a constant belt speed control which controls a driving motor (a driving source for an intermediate transfer belt) to move the intermediate transfer belt at a predetermined target belt speed or a constant motor speed control which rotates the driving motor at a predetermined target rotational speed according to a print command, and then, prior to a first-time print job, after executing a writing position correcting process while moving the intermediate transfer belt under the constant belt speed control, forms a color shift detecting image by switching from the constant belt speed control to the constant motor speed control, measures a difference between amounts of color shift, and executes a speed correcting process for correcting the target rotational speed of the driving motor in the constant motor speed control based on the measurement result.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: January 1, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Maehata, Yasuhisa Ehara, Noriaki Funamoto, Tetsuji Nishikawa, Jun Yasuda, Hiroaki Murakami
  • Patent number: 8340552
    Abstract: A printer according to the present invention is a so-called tandem-type printer, and has a configuration that a motor gear is directly connected to an M-photoconductor driving gear and an idler gear is directly connected to a Y-photoconductor driving gear and the M-photoconductor driving gear. A diameter of the Y and M photoconductors driving gear, a distance between transfer sections of the Y and M photoconductors, a motor gear input angle, and an idler input angle are set so that an absolute value of a value obtained by subtracting 1 from an ideal amplitude ratio, which indicates a ratio of an ideal amplitude of an eccentric component of the Y-photoconductor driving gear to an actual amplitude of an eccentric component of the M-photoconductor driving gear, is equal to or less than a maximum allowable amplitude ratio.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 25, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Yasuhiro Maehata, Tetsuji Nishikawa, Masahiro Ishida, Yasuhisa Ehara, Noriaki Funamoto, Jun Yasuda
  • Patent number: 8331822
    Abstract: An image forming apparatus includes a plurality of image bearing members, each of which is configured to bear a portion of a pattern image including a plurality of reference images in a given form, an endless moving member facing the plurality of image bearing members and configured to receive the pattern image, an image detecting unit configured to detect the plurality of reference images, a rotational angle detecting unit configured to separately detect each image bearing member at a given rotational angle, and a controller configured to detect a speed deviation pattern for each revolution of each image bearing member. The controller is configured to detect the speed deviation pattern based on a result obtained from a phase component and a quadrature component of a frequency signal generated from the detection result obtained by the rotational angle detecting unit and a result of detecting the plurality of reference images in the pattern image transferred onto the endless moving member.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: December 11, 2012
    Assignee: Ricoh Co., Ltd.
    Inventors: Kazuhiko Kobayashi, Joh Ebara, Yasuhisa Ehara, Kouji Amanai, Seiichi Handa, Yuji Matsuda, Toshiyuki Uchida, Noriaki Funamoto, Keisuke Sugiyama
  • Patent number: 8295736
    Abstract: In an image forming apparatus, a rotation detector detects an angular velocity or an angular displacement of a shared drive motor, or an angular velocity or an angular displacement of a photosensitive element. A drive control unit executes a process for controlling a drive speed of a drive source of the photosensitive element based on a result of detection by the rotation detector.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: October 23, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Noriaki Funamoto, Yasuhisa Ehara, Tetsuji Nishikawa, Yasuhiro Maehata, Jun Yasuda
  • Patent number: 8254813
    Abstract: A multicolor imaging system includes a controller which adjusts a phase difference in rotations of photoreceptors based on information detected by a rotary position detector, and drive elements for photoreceptors which generate a velocity fluctuation in the same cycle as that of a transfer unit. The controller is configured to concurrently adjust the phases of the photoreceptors and those of the drive elements so that a registration error in four color toner image on an intermediate transfer belt is reduced to a minimum.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: August 28, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Noriaki Funamoto, Yasuhisa Ehara, Tetsuji Nishikawa, Yasuhiro Maehata, Jun Yasuda, Hiroaki Murakami
  • Patent number: 8095028
    Abstract: A driving motor for a color black is shared between a photosensitive body for the color black and a driving roller that drives an intermediate transfer belt not shown. Furthermore, a driving motor for colors yellow, magenta, and cyan is shared between photosensitive bodies for the colors yellow, magenta, and cyan. Driving of the driving motor for the colors yellow, magenta, and cyan is controlled based on a first waveform as a speed fluctuation waveform of the photosensitive body for the color black obtained when the driving motor for the color black is driven at a predetermined speed and second waveforms as speed fluctuation waveforms of the photosensitive bodies for the colors yellow, magenta, and cyan obtained when the driving motor for the colors yellow, magenta, and cyan is driven at a predetermined speed.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: January 10, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhisa Ehara, Noriaki Funamoto, Jun Yasuda, Tetsuji Nishikawa, Yasuhiro Maehata
  • Patent number: 8064801
    Abstract: A drive transmission device that performs drive transmission through a plurality of systems and includes a first involute spline joint to perform drive transmission to a primary rotating body to be driven and a second involute spline joint to perform drive transmission to a secondary rotating body to be driven.
    Type: Grant
    Filed: September 15, 2008
    Date of Patent: November 22, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Keisuke Sugiyama, Yasuhisa Ehara, Toshiyuki Uchida, Noriaki Funamoto
  • Patent number: 8010026
    Abstract: An image forming system, in which a method of detecting a misregistration of a color image is performed, includes multiple image carriers, an optical writing unit, a transfer member extended by a drive roller and at least one driven roller, a rotation detector, a roller driving unit, a belt controller, an image detector configured to detect the images formed on the surface of the transfer member and obtain detection data, and a controller configured to calculate an amount of misregistration and correct relative misregistration of a scanning line between the image carriers based on a result of the calculation. In the image forming system, a distance from a transfer position to a detection position is an integer multiple of a travel distance of the transfer member during one revolution of the at least one driven roller.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company Limited
    Inventors: Kazuhiko Kobayashi, Yasuhisa Ehara, Joh Ebara, Toshiyuki Uchida, Noriaki Funamoto, Keisuke Sugiyama
  • Patent number: 8010019
    Abstract: An image forming apparatus that includes a plurality of image bearing members, a plurality of drive sources each including a drive gear, a plurality of driven gears, a visible image forming unit, an endless traveling member, a transfer unit, an image detection unit, and a controller. The controller controls rotation of the plurality of image bearing members according to a velocity fluctuation pattern of each surface of the image bearing members based on a detection time interval between predetermined visible detection images formed on the surface of the image bearing member and transferred therefrom to the endless traveling member detected by the image detection unit. Each of the plurality of driven gears includes a gear portion and an engaging portion integrated therewith. The gear portion includes a geared circumference and the engaging portion engages the image bearing member.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company Limited
    Inventors: Noriaki Funamoto, Joh Ebara, Kazuhiko Kobayashi, Keisuke Sugiyama, Toshiyuki Uchida, Yasuhisa Ehara
  • Patent number: 7991326
    Abstract: An image forming apparatus is disclosed. In at least one embodiment, the apparatus includes a plurality of image carriers to carry an image; a plurality of drivers to drive the image carriers; a plurality of drive-force transmitting members to transmit a driving-force from the drivers to image carriers; a developing unit, provided to the image carriers, to develop the image; a transfer member, facing the image carriers, to receive the image from the image carriers sequentially; an image detector to detect the image on the transfer member to check a detection timing of the image; a sensor, provided to each of the image carriers, to detect a rotational speed of image carriers; and a controller to conduct an image-to-image displacement control, a speed-deviation checking, and a phase adjustment control for each of the plurality of image carriers with the image detector and sensor.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: August 2, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhisa Ehara, Kazuhiko Kobayashi, Joh Ebara, Noriaki Funamoto, Seichi Handa, Yuji Matsuda
  • Publication number: 20110150531
    Abstract: An image forming apparatus includes a plurality of image bearing members, each of which is configured to bear a portion of a pattern image including a plurality of reference images in a given form, an endless moving member facing the plurality of image bearing members and configured to receive the pattern image, an image detecting unit configured to detect the plurality of reference images, a rotational angle detecting unit configured to separately detect each image bearing member at a given rotational angle, and a controller configured to detect a speed deviation pattern for each revolution of each image bearing member. The controller is configured to detect the speed deviation pattern based on a result obtained from a phase component and a quadrature component of a frequency signal generated from the detection result obtained by the rotational angle detecting unit and a result of detecting the plurality of reference images in the pattern image transferred onto the endless moving member.
    Type: Application
    Filed: March 2, 2011
    Publication date: June 23, 2011
    Inventors: Kazuhiko KOBAYASHI, Joh Ebara, Yasuhisa Ehara, Kouji Amanai, Seiichi Handa, Yuji Matsuda, Toshiyuki Uchida, Noriaki Funamoto, Keisuke Sugiyama
  • Patent number: 7937007
    Abstract: An image forming apparatus includes a plurality of image bearing members, each of which is configured to bear a portion of a pattern image including a plurality of reference images in a given form, an endless moving member facing the plurality of image bearing members and configured to receive the pattern image, an image detecting unit configured to detect the plurality of reference images, a rotational angle detecting unit configured to separately detect each image bearing member at a given rotational angle, and a controller configured to detect a speed deviation pattern for each revolution of each image bearing member. The controller is configured to detect the speed deviation pattern based on a result obtained from a phase component and a quadrature component of a frequency signal generated from the detection result obtained by the rotational angle detecting unit and a result of detecting the plurality of reference images in the pattern image transferred onto the endless moving member.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: May 3, 2011
    Assignee: Ricoh Co., Ltd.
    Inventors: Kazuhiko Kobayashi, Joh Ebara, Yasuhisa Ehara, Kouji Amanai, Seiichi Handa, Yuji Matsuda, Toshiyuki Uchida, Noriaki Funamoto, Keisuke Sugiyama
  • Publication number: 20110058870
    Abstract: A sheet conveyance device for conveying a recording medium includes a fixed roller, a movable roller, an urging member, and a shock absorber, and an image forming apparatus including the sheet conveyance device. The position of the fixed roller is fixed. The movable roller is disposed opposite the fixed roller to contact the fixed roller, thereby defining a nip. The urging member urges the movable member to contact the fixed roller in the absence of the recording medium in the nip and allows the movable member to separate from the fixed roller by an amount corresponding to a thickness of a recording medium when the recording medium enters the nip. The shock absorber absorbs displacement energy generated when the urging member urges the movable roller to contact the fixed roller again after the recording medium passes through the nip.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 10, 2011
    Inventors: Hiroaki Murakami, Yasuhisa Ehara, Noriaki Funamoto, Tetsuji Nishikawa, Yasuhiro Maehata, Jun Yasuda, Satoshi Araaki
  • Publication number: 20110058827
    Abstract: A main controlling part is configured to choose and execute either a constant belt speed control which controls a driving motor (a driving source for an intermediate transfer belt) to move the intermediate transfer belt at a predetermined target belt speed or a constant motor speed control which rotates the driving motor at a predetermined target rotational speed according to a print command, and then, prior to a first-time print job, after executing a writing position correcting process while moving the intermediate transfer belt under the constant belt speed control, forms a color shift detecting image by switching from the constant belt speed control to the constant motor speed control, measures a difference between amounts of color shift, and executes a speed correcting process for correcting the target rotational speed of the driving motor in the constant motor speed control based on the measurement result.
    Type: Application
    Filed: September 3, 2010
    Publication date: March 10, 2011
    Applicant: Ricoh Company, Ltd.
    Inventors: Yasuhiro Maehata, Yasuhisa Ehara, Noriaki Funamoto, Tetsuji Nishikawa, Jun Yasuda, Hiroaki Murakami