Patents by Inventor Seiji Ogasawara

Seiji Ogasawara 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).

  • Publication number: 20190193432
    Abstract: A print media feeding apparatus includes: a stacking part configured to stack the print media; a feeding roller which is movable to an abutting position at which the feeding roller contacts the print media stacked on the stacking part and to a separated position separated from the print media stacked on the stacking part and configured to feed a print medium by rotating at the abutting position; a separation member configured to separate the print media; and a return unit configured to perform a return operation of returning the print medium other than a top print medium which the feeding roller abuts. The feeding roller moves to the separated position, after feeding the print medium from the stacking part. The return unit performs the return operation upon the feeding roller moving to the separated position. After the return operation, the feeding roller stops at the abutting position.
    Type: Application
    Filed: December 17, 2018
    Publication date: June 27, 2019
    Inventors: Masakazu Tsukuda, Seiji Ogasawara, Takaaki Ishida, Shuichi Tokuda, Masaaki Matsuura, Kazuki Matsuo, Motoyuki Taguchi
  • Publication number: 20190193427
    Abstract: A printing apparatus includes a first feeding part configured to feed print media from a first support part supporting the print media, a second feeding part configured to feed print media from a second support part supporting the print media, and a print head configured to print the print media fed by the first feeding part or the second feeding part. Further, the printing apparatus includes a first conveying path where the print media fed by the first feeding part are conveyed to the print head, and a second conveying path where the print media fed by the second feeding part are conveyed to the print head. At least a part of the second feeding part protrudes in a predetermined spatial area within the first conveying path during a feed operation of feeding print media from the second support part.
    Type: Application
    Filed: December 18, 2018
    Publication date: June 27, 2019
    Inventors: Masakazu Tsukuda, Seiji Ogasawara, Takaaki Ishida, Shuichi Tokuda, Masaaki Matsuura, Kazuki Matsuo
  • Publication number: 20190184719
    Abstract: For a printing apparatus, a first conveyance speed for a first printing medium is determined according to first print data to be printed on the first printing medium and a second conveyance speed for a second printing medium is determined according to second print data to be printed on the second printing medium that follows the first printing medium along a conveying path. In a case where the second conveyance speed is equal to the first conveyance speed, a conveyance operation of the second printing medium is started before the first printing medium is discharged from the conveying path. In a case where the second conveyance speed is different from the first conveyance speed, the conveyance operation of the second printing medium is started after the first printing medium is discharged from the conveying path.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 20, 2019
    Inventors: Masaaki Matsuura, Seiji Ogasawara, Takaaki Ishida, Masakazu Tsukuda, Shuichi Tokuda, Kazuki Matsuo
  • Publication number: 20190184718
    Abstract: A printing apparatus capable of easily performing jam processing is provided. For this purpose, once support of a platen supporting member is released, then the platen will automatically turn to a predetermined angle.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 20, 2019
    Inventors: Kazuki Matsuo, Seiji Ogasawara, Takaaki Ishida, Shuichi Tokuda, Masakazu Tsukuda, Masaaki Matsuura
  • Patent number: 10183505
    Abstract: A printing apparatus includes a suction unit configured to allow a negative pressure, by which a sheet is sucked to a supporting portion, to act on the sheet; and ink receivers configured to receive ink ejected outside of the sheet. Waste ink ejected to the ink receivers is guided to a waste ink discharge port formed on an outer peripheral wall of a platen through waste ink channels. A sheet sucking mechanism configured to apply the negative pressure is disposed adjacent to the suction unit. A discharging mechanism configured to forcibly discharge waste ink outside of the platen is connected to the waste ink discharge port.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: January 22, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Ogasawara, Tetsuji Kurata, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito
  • Publication number: 20180339530
    Abstract: A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.
    Type: Application
    Filed: August 7, 2018
    Publication date: November 29, 2018
    Inventors: Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito, Arihito Miyakoshi, Masahiko Kubota, Yusuke Imahashi, Nobuhito Yamaguchi, Hiroshi Arimizu, Yoshinori Itoh
  • Patent number: 10071572
    Abstract: A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito, Arihito Miyakoshi, Masahiko Kubota, Yusuke Imahashi, Nobuhito Yamaguchi, Hiroshi Arimizu, Yoshinori Itoh
  • Publication number: 20180236791
    Abstract: There is provided an inkjet printing apparatus capable of stably outputting high quality images in a configuration of feeding a print medium that is kept horizontal, performing printing by the use of a print head, and conveying the print medium vertically upward. To this purpose, a platen that supports the back side of the print medium in a position facing a printing part of the print head is located to support the print medium at an angle greater than 0° and less than 90° with respect to the horizontal direction, thereby reducing a contact pressure from roller pairs on the printed side immediately after printing.
    Type: Application
    Filed: January 26, 2018
    Publication date: August 23, 2018
    Inventors: Tetsuyo Ohashi, Yasuyuki Takanaka, Tetsuya Ishikawa, Seiji Ogasawara, Noriko Sato, Akira Kida, Noboru Shimoyama
  • Publication number: 20180236797
    Abstract: There is provided an inkjet printing apparatus capable of moving a print head in a short time using a simpler configuration. To this purpose, the print head is moved while simultaneously performing rotational movement and linear movement between a printing position and a maintenance position in the printing apparatus.
    Type: Application
    Filed: February 8, 2018
    Publication date: August 23, 2018
    Inventors: Tetsuyo Ohashi, Yasuyuki Takanaka, Tetsuya Ishikawa, Seiji Ogasawara, Noriko Sato, Akira Kida, Noboru Shimoyama
  • Patent number: 10011124
    Abstract: Marginless printing is performed by using a printhead which ejects ink. Information on an inclination of a sheet to be conveyed is obtained, and in performing the marginless printing at a leading end of the sheet, an image region with respect to which ink is discarded to an outside of the sheet is set based on the obtained information. Further, a platen which supports the sheet by sucking in a manner facing the printhead which ejects the ink is provided and control is performed such that in performing printing sequentially from the leading end to a trailing end of the sheet, suction force of the platen is decreased upon approach of a portion to be printed to the trailing end of the sheet.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: July 3, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Ogasawara, Tetsuji Kurata
  • Publication number: 20180015741
    Abstract: A platen includes: a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and ink receiver and that receive ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction (i.e., an X direction) transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.
    Type: Application
    Filed: September 27, 2017
    Publication date: January 18, 2018
    Inventors: Takahide Onuma, Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Yasunori Saito
  • Patent number: 9802426
    Abstract: A platen includes: a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and ink receiver and that receive ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction (i.e., an X direction) transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: October 31, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takahide Onuma, Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Yasunori Saito
  • Publication number: 20160347092
    Abstract: A platen includes: a supporting portion that can support a sheet; a suction unit that sucks the sheet in such a manner as to attach the sheet to the supporting portion; a first ink receiver that receives ink ejected downstream of the leading end of the sheet passing the supporting portion; and a second ink receiver that receives ink ejected upstream of the trailing end of the sheet passing the supporting portion.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 1, 2016
    Inventors: Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito, Arihito Miyakoshi, Masahiko Kubota, Yusuke Imahashi, Nobuhito Yamaguchi, Hiroshi Arimizu, Yoshinori Itoh
  • Publication number: 20160347095
    Abstract: Marginless printing is performed by using a printhead which ejects ink. Information on an inclination of a sheet to be conveyed is obtained, and in performing the marginless printing at a leading end of the sheet, an image region with respect to which ink is discarded to an outside of the sheet is set based on the obtained information. Further, a platen which supports the sheet by sucking in a manner facing the printhead which ejects the ink is provided and control is performed such that in performing printing sequentially from the leading end to a trailing end of the sheet, suction force of the platen is decreased upon approach of a portion to be printed to the trailing end of the sheet.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 1, 2016
    Inventors: Seiji Ogasawara, Tetsuji Kurata
  • Publication number: 20160347093
    Abstract: A printing apparatus includes: a suction unit configured to allow a negative pressure, by which a sheet is sucked to a supporting portion, to act on the sheet; and ink receivers and configured to receive ink ejected to the outside of the sheet. Waste ink ejected to the ink receiver is guided to a waste ink discharge port formed on an outer peripheral wall of a platen through waste ink channels. A sheet sucking mechanism configured to apply the negative pressure is disposed adjacent to the suction unit. A discharging mechanism configured to forcibly discharge waste ink outside of the platen is connected to the waste ink discharge port.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 1, 2016
    Inventors: Seiji Ogasawara, Tetsuji Kurata, Masakazu Tsukuda, Takahide Onuma, Yasunori Saito
  • Publication number: 20160347091
    Abstract: A platen includes: a plurality of supporting portions capable of supporting a sheet; negative pressure chambers, to which a negative pressure is supplied, so as to suck a sheet facing the supporting portions to the supporting portions; and ink receiver and that receive ink ejected from a printhead to the outside of the sheet supported by the supporting portions. The plurality of supporting portions are arranged in a sheet width direction (i.e., an X direction) transverse a sheet conveyance direction. The plurality of negative pressure chambers are disposed in a manner corresponding to the plurality of supporting portions, respectively.
    Type: Application
    Filed: May 20, 2016
    Publication date: December 1, 2016
    Inventors: Takahide Onuma, Tetsuji Kurata, Seiji Ogasawara, Masakazu Tsukuda, Yasunori Saito
  • Patent number: 9340027
    Abstract: An inkjet recording apparatus includes a recording head configured to discharge ink, a first waste ink retaining member configured to absorb ink discharged from the recording head, a second waste ink retaining member arranged below the first waste ink retaining member, a first inclined surface configured to flow waste ink overflowing the first waste ink retaining member downward, a waste ink receiving surface connected with a bottom end of the first inclined surface and including a porous body sheet for absorbing waste ink, and a second inclined surface configured to flow waste ink overflowing the porous body sheet to the second waste ink retaining member.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: May 17, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Seiji Ogasawara
  • Patent number: 9090099
    Abstract: There is provided an inkjet printing apparatus which, even in a case where a landing position of ink changes due to a change in a distance between an ejection port of a print head and a support surface of a print medium, the print medium is conveyed by an appropriate conveyance amount. The inkjet printing apparatus detects a changing amount of the landing position of an ink droplet. The conveyance amount of the print medium by a conveying roller and a pinch roller is controlled based upon the detected changing amount.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: July 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Seiji Ogasawara
  • Patent number: 8950844
    Abstract: An inkjet printing apparatus is provided which minimizes the amount of inks consumed for preventing the sedimentation of ejected inks on the platen ink absorber and which can effectively prevent the sedimentation of inks. To this end, a comparison is made between the ejected volume of easily sedimenting inks and the ejected volume of sedimentation restraining inks in terms of ink components. If the ejected volume of the sedimentation restraining inks is found not enough, a required amount of sedimentation restraining ink is additionally ejected.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: February 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Takahashi, Yuji Hamasaki, Kei Yoshizawa, Yoshinori Nakagawa, Nobuhiro Kitabatake, Seiji Ogasawara
  • Patent number: 8845217
    Abstract: A printing apparatus capable of maintaining print sheet conveying performance while keeping apparatus cost low and apparatus size small is provided. The printing apparatus includes a conveying mechanism and a print unit. The conveying mechanism includes a conveying roller which is a driving roller, a plurality of pinch rollers which are passive rollers disposed facing the conveying roller, and a plurality of pinch roller axles supporting the pinch rollers. The print unit prints onto a sheet conveyed by the conveying rollers and the plurality of pinch rollers. The conveying mechanism includes one or more first pinch roller sets including two pinch rollers and a first pinch roller axle supporting the two pinch rollers, and one or more second pinch roller sets including three pinch rollers and a second pinch roller axle supporting the three pinch rollers.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Seiji Ogasawara, Shimpei Shinohara