Patents by Inventor Shunsuke Okazaki

Shunsuke Okazaki 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: 9975717
    Abstract: A sheet feeding apparatus includes a sheet presence/absence detection sensor configured to detect presence or absence of a sheet on a stacking device, a sheet surface detection sensor configured to detect that a stacking tray is raised to enable a sheet to be fed, a separation cam, and a control unit. The control unit is configured to determine that the mounting state of a feeding holder to a holder support unit is defective when the sheet surface detection sensor detects that the sheet can be fed when the sheet presence/absence detection sensor detects absence of a sheet before sheet feeding processing by a pickup roller.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: May 22, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuhito Fujinuma, Shunsuke Okazaki
  • Publication number: 20180050878
    Abstract: A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.
    Type: Application
    Filed: October 31, 2017
    Publication date: February 22, 2018
    Inventors: Shunsuke Okazaki, Akira Matsushima
  • Patent number: 9840382
    Abstract: A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: December 12, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shunsuke Okazaki, Akira Matsushima
  • Publication number: 20170217707
    Abstract: A sheet feeding apparatus includes a sheet presence/absence detection sensor configured to detect presence or absence of a sheet on a stacking device, a sheet surface detection sensor configured to detect that a stacking tray is raised to enable a sheet to be fed, a separation cam, and a control unit. The control unit is configured to determine that the mounting state of a feeding holder to a holder support unit is defective when the sheet surface detection sensor detects that the sheet can be fed when the sheet presence/absence detection sensor detects absence of a sheet before sheet feeding processing by a pickup roller.
    Type: Application
    Filed: January 23, 2017
    Publication date: August 3, 2017
    Inventors: Yasuhito Fujinuma, Shunsuke Okazaki
  • Publication number: 20160297631
    Abstract: A sheet supporting apparatus includes a body, a supporting portion configured to be held in an elevating manner by the body and to support a sheet, a sheet regulation portion regulating a position of the sheet supported on the supporting portion, a movement portion capable of moving between a first position where the sheet regulation portion regulates the position of the sheet supported on the supporting portion, and a second position where the supporting portion is regulated from elevating with respect to the body, and a movement regulation unit regulating the movement portion from moving to the second position.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 13, 2016
    Inventors: Shunsuke Okazaki, Akira Matsushima
  • Patent number: 9126789
    Abstract: The present invention provides an image forming apparatus that can facilitate a replacement of a sheet feeding portion. When a detecting portion detects that a sheet feeding cassette is mounted, a controller controls a driving portion in such a manner as to lift a sheet supporting plate for the mounted sheet feeding cassette. When the detecting portion detects that a sheet feeding cassette is mounted, the controller controls a driving portion in such a manner as not to lift a sheet supporting plate for the mounted sheet feeding cassette in the case where it is determined that a sheet feeding cassette nearest a feeding roller of the mounted sheet feeding cassette is drawn or detached.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: September 8, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirofumi Hori, Ryuji Hamasaki, Shunsuke Okazaki
  • Publication number: 20150021847
    Abstract: The present invention provides an image forming apparatus that can facilitate a replacement of a sheet feeding portion. When a detecting portion detects that a sheet feeding cassette is mounted, a controller controls a driving portion in such a manner as to lift a sheet supporting plate for the mounted sheet feeding cassette. When the detecting portion detects that a sheet feeding cassette is mounted, the controller controls a driving portion in such a manner as not to lift a sheet supporting plate for the mounted sheet feeding cassette in the case where it is determined that a sheet feeding cassette nearest a feeding roller of the mounted sheet feeding cassette is drawn or detached.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: Hirofumi Hori, Ryuji Hamasaki, Shunsuke Okazaki
  • Patent number: 8727339
    Abstract: When a retard roller is rotating in a sheet feeding direction, the rotation is transmitted to a pickup roller and the pickup roller rotates in a direction for conveying the sheet. When the retard roller is rotating in a direction opposite to the sheet feeding direction or is stationary, the pickup roller does not feed the sheet. Therefore, in a successive feeding operation, the sheet to be fed next is always conveyed such that the leading end thereof reaches a nip position between a feed roller and the retard roller. Therefore, the intervals between the sheets are uniform in the successive feeding operation.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: May 20, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Matsushima, Yasuhiro Uchida, Shunsuke Okazaki, Minoru Kawanishi, Kenji Watanabe, Motohiro Furusawa
  • Patent number: 8714543
    Abstract: The present invention relates a sheet feeding apparatus with a lifting and lowering mechanism in a sheet deck 2, which includes abutting portions 101a to 101d which makes wire hanging portions 64a to 64d of a sheet stacking table 52 abut thereon and makes the sheet stacking table 52 lockable with respect to a storing portion 61. The mechanism also includes a pulse motor 27 and a one-way clutch 40. A controller 5 drives the pulse motor 27 to be rotated in a lifting direction of the sheet stacking table 52, further drives the pulse motor 27 to be rotated in the same direction even after the wire hanging portions 64a to 64d abut on the abutting portions 101a to 101d to cause the pulse motor 27 to step out, and renders the pulse motor 27 non-conductive. Thus, the wire hanging portions is locked to abut on the abutting portions.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: May 6, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Matsushima, Shunsuke Okazaki
  • Patent number: 8556253
    Abstract: The sheet feeding apparatus includes an apparatus body, a sheet cassette, a positioning member which includes a positioning pin arranged at one of the apparatus body and the sheet cassette and a positioning hole arranged at the other of the apparatus body and the sheet cassette and which performs positioning of the sheet cassette owing to fitting of the positioning pin with the positioning hole when the sheet cassette is slidingly moved to an attached position, and a restriction member which performs restriction of movement of the sheet cassette in the horizontal direction being perpendicular to a sliding direction from a drawn position to a fitting beginning position where fitting of the positioning member begins and which releases restriction of the movement of the sheet cassette in the horizontal direction from the fitting beginning position to the attached position.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: October 15, 2013
    Assignee: Canon Kabushikia Kaisha
    Inventor: Shunsuke Okazaki
  • Patent number: 8430393
    Abstract: When a retard roller is rotating in a sheet feeding direction, the rotation is transmitted to a pickup roller and the pickup roller rotates in a direction for conveying the sheet. When the retard roller is rotating in a direction opposite to the sheet feeding direction or is stationary, the pickup roller does not feed the sheet. Therefore, in a successive feeding operation, the sheet to be fed next is always conveyed such that the leading end thereof reaches a nip position between a feed roller and the retard roller. Therefore, the intervals between the sheets are uniform in the successive feeding operation.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: April 30, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Matsushima, Yasuhiro Uchida, Shunsuke Okazaki, Minoru Kawanishi, Kenji Watanabe, Motohiro Furusawa
  • Publication number: 20130026701
    Abstract: The sheet feeding apparatus includes an apparatus body, a sheet cassette, a positioning member which includes a positioning pin arranged at one of the apparatus body and the sheet cassette and a positioning hole arranged at the other of the apparatus body and the sheet cassette and which performs positioning of the sheet cassette owing to fitting of the positioning pin with the positioning hole when the sheet cassette is slidingly moved to an attached position, and a restriction member which performs restriction of movement of the sheet cassette in the horizontal direction being perpendicular to a sliding direction from a drawn position to a fitting beginning position where fitting of the positioning member begins and which releases restriction of the movement of the sheet cassette in the horizontal direction from the fitting beginning position to the attached position.
    Type: Application
    Filed: July 23, 2012
    Publication date: January 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Shunsuke Okazaki
  • Publication number: 20120256367
    Abstract: The present invention relates a sheet feeding apparatus with a lifting and lowering mechanism in a sheet deck 2, which includes abutting portions 101a to 101d which makes wire hanging portions 64a to 64d of a sheet stacking table 52 abut thereon and makes the sheet stacking table 52 lockable with respect to a storing portion 61. The mechanism also includes a pulse motor 27 and a one-way clutch 40. A controller 5 drives the pulse motor 27 to be rotated in a lifting direction of the sheet stacking table 52, further drives the pulse motor 27 to be rotated in the same direction even after the wire hanging portions 64a to 64d abut on the abutting portions 101a to 101d to cause the pulse motor 27 to step out, and renders the pulse motor 27 non-conductive. Thus, the wire hanging portions is locked to abut on the abutting portions.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 11, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akira Matsushima, Shunsuke Okazaki
  • Publication number: 20110006469
    Abstract: When a retard roller is rotating in a sheet feeding direction, the rotation is transmitted to a pickup roller and the pickup roller rotates in a direction for conveying the sheet. When the retard roller is rotating in a direction opposite to the sheet feeding direction or is stationary, the pickup roller does not feed the sheet. Therefore, in a successive feeding operation, the sheet to be fed next is always conveyed such that the leading end thereof reaches a nip position between a feed roller and the retard roller. Therefore, the intervals between the sheets are uniform in the successive feeding operation.
    Type: Application
    Filed: July 12, 2010
    Publication date: January 13, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akira Matsushima, Yasuhiro Uchida, Shunsuke Okazaki, Minoru Kawanishi, Kenji Watanabe, Motohiro Furusawa