Patents by Inventor Masatsugu Ohishi

Masatsugu Ohishi 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: 9983524
    Abstract: A fixing portion is provided with a fixing roller, a heating roller having a heat source, a fixing belt stretched between the fixing roller and the heating roller, and a pressurizing roller that is brought into pressure contact with the fixing roller across the fixing belt and forms a nip portion into which a sheet of paper is conveyed between the fixing belt and the pressurizing roller. The fixing portion is further provided with a pad that has a contact surface portion in contact with the inner peripheral surface of the fixing belt, and a biasing member that biases the pad in a direction in which the contact surface portion is brought into pressure contact with the inner peripheral surface of the fixing belt. The pad is configured so as to pivot about the rotating shaft of the heating roller.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: May 29, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kousuke Namisaki, Masayuki Nakanishi, Masatsugu Ohishi
  • Publication number: 20170168438
    Abstract: A fixing portion is provided with a fixing roller, a heating roller having a heat source, a fixing belt stretched between the fixing roller and the heating roller, and a pressurizing roller that is brought into pressure contact with the fixing roller across the fixing belt and forms a nip portion into which a sheet of paper is conveyed between the fixing belt and the pressurizing roller. The fixing portion is further provided with a pad that has a contact surface portion in contact with the inner peripheral surface of the fixing belt, and a biasing member that biases the pad in a direction in which the contact surface portion is brought into pressure contact with the inner peripheral surface of the fixing belt. The pad is configured so as to pivot about the rotating shaft of the heating roller.
    Type: Application
    Filed: December 12, 2016
    Publication date: June 15, 2017
    Inventors: Kousuke NAMISAKI, Masayuki NAKANISHI, Masatsugu OHISHI
  • Patent number: 9164434
    Abstract: A fixing apparatus of the present invention includes a fixing rotation member, a rotation drive portion that rotates the fixing rotation member, a cleaning web sheet that cleans a circumferential surface of the fixing rotation member, a cleaning web sheet roller that takes up or feeds out the cleaning web sheet, a swing cam rotationally driven by the rotation drive portion, a rotation transmission portion that transmits a rotation drive force to the cleaning web sheet roller, a one way clutch provided on an input shaft of the rotation transmission portion, and a swing lever connected to the one way clutch and biased so as to be brought into slide contact with the swing cam.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: October 20, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hirokazu Nakamura, Masatsugu Ohishi, Noriko Inoue, Masaki Amemiya, Masaya Asakawa, Takashi Yamanaka
  • Publication number: 20150093135
    Abstract: A fixing apparatus of the present invention includes a fixing rotation member, a rotation drive portion that rotates the fixing rotation member, a cleaning web sheet that cleans a circumferential surface of the fixing rotation member, a cleaning web sheet roller that takes up or feeds out the cleaning web sheet, a swing cam rotationally driven by the rotation drive portion, a rotation transmission portion that transmits a rotation drive force to the cleaning web sheet roller, a one way clutch provided on an input shaft of the rotation transmission portion, and a swing lever connected to the one way clutch and biased so as to be brought into slide contact with the swing cam.
    Type: Application
    Filed: December 9, 2014
    Publication date: April 2, 2015
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hirokazu NAKAMURA, Masatsugu OHISHI, Noriko INOUE, Masaki AMEMIYA, Masaya ASAKAWA, Takashi YAMANAKA
  • Patent number: 8948670
    Abstract: A fixing apparatus of the present invention includes a fixing rotation member, a rotation drive portion that rotates the fixing rotation member, a cleaning web sheet that cleans a circumferential surface of the fixing rotation member, a cleaning web sheet roller that takes up or feeds out the cleaning web sheet, a swing cam rotationally driven by the rotation drive portion, a rotation transmission portion that transmits a rotation drive force to the cleaning web sheet roller, a one way clutch provided on an input shaft of the rotation transmission portion, and a swing lever connected to the one way clutch and biased so as to be brought into slide contact with the swing cam.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: February 3, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hirokazu Nakamura, Masatsugu Ohishi, Noriko Inoue, Masaki Amemiya, Masaya Asakawa, Takashi Yamanaka
  • Patent number: 8293355
    Abstract: In the present glossy paper, an opposite surface of a glossed and smooth image formation surface is rough-surfaced. Therefore, the glossy paper do not adhere together even under the high-temperature and high-humidity environment. In fact, the present invention provides glossy paper which can advantageously achieve a continuous paper feeding in the image forming apparatus regardless of the use environment conditions.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: October 23, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaharu Kimura, Masatsugu Ohishi, Yasuaki Fukada, Masaya Asakawa
  • Patent number: 8205883
    Abstract: A transport path switching unit is provided between transport rollers and pre-registration rollers, and control is performed to switch between a main transport path and an extended transport path of the transport path switching unit such that either the main transport path or the extended transport path is interposed as the part of the paper transport path between the transport rollers and the pre-registration rollers to vary a total length of the paper transport path.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: June 26, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masahiko Fujita, Tadasu Taniguchi, Masaharu Kimura, Yasuaki Fukada, Masaya Asakawa, Yasuhiro Takai, Norichika Katsura, Masatsugu Ohishi
  • Patent number: 8136808
    Abstract: A paper feeding device 200 provided in an image forming apparatus 1A according to one embodiment of the present invention is provided with a loading member 201 in which sheets P can be stacked and a central bending section 210 configured to upwardly raise a sheet transport direction X central area P2 of the sheet P for sheets P stacked in the loading member 201.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: March 20, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaharu Kimura, Masatsugu Ohishi, Masahiko Fujita, Tadasu Taniguchi, Yasuaki Fukada
  • Publication number: 20110280636
    Abstract: A fixing apparatus of the present invention includes a fixing rotation member, a rotation drive portion that rotates the fixing rotation member, a cleaning web sheet that cleans a circumferential surface of the fixing rotation member, a cleaning web sheet roller that takes up or feeds out the cleaning web sheet, a swing cam rotationally driven by the rotation drive portion, a rotation transmission portion that transmits a rotation drive force to the cleaning web sheet roller, a one way clutch provided on an input shaft of the rotation transmission portion, and a swing lever connected to the one way clutch and biased so as to be brought into slide contact with the swing cam.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 17, 2011
    Inventors: Hirokazu NAKAMURA, Masatsugu OHISHI, Noriko INOUE, Masaki AMEMIYA, Masaya ASAKAWA, Takashi YAMANAKA
  • Patent number: 8011655
    Abstract: A sheet feeding apparatus includes first and second sheet sensors provided in order from upstream to downstream sides in feeding direction on a paper feed path, sheet conveyor roller sets arranged along the path, and a roller controller individually controlling groups of rollers on the upstream and downstream sides of the first sheet sensor, in response to a change in values of output signals from first and second sheet sensors. The roller controller includes an overlapped feeding determining device outputting a determination signal assuming a first value when overlapped feeding occurs and a second value otherwise, in response to the change in values of the output signals from the sensors, an overlapped feeding eliminating device eliminating overlapped feeding by controlling the roller controller upon receiving the determination signal of the first value, and a conveyor roller stopping device stopping the sheet conveyor rollers if the overlapped feeding eliminating process should fail.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: September 6, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masatsugu Ohishi, Masaharu Kimura, Norichika Katsura, Masaya Asakawa, Yasuaki Fukada
  • Patent number: 7950648
    Abstract: A feeding device according to the present invention includes a box, paper holders, and a shifting mechanism. The box is open at its top. The paper holders are open at their tops and positioned in the box. Each of the paper holders holds a pile of sheets of paper in it. The shifting mechanism so shifts at least one of the paper holders that the top sheet in one of the paper holders is positioned in a single feed position in the box according to selection data output from the apparatus with which the feeding device is used.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: May 31, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaya Asakawa, Masahiko Fujita, Tadasu Taniguchi, Masatsugu Ohishi, Masaharu Kimura, Yasuaki Fukada, Norichika Katsura, Yasuhiro Takai
  • Patent number: 7780162
    Abstract: Rack gears of far-side paper guides are provided such that manners of meshing with pinion gears are made tighter at respective regions corresponding to locations for constraining paper of standard size, as compared to other regions. In addition, by constituting width guide plates which are upstream in a paper feed directions from far-side paper guides and width guide plates which are downstream in a paper feed directions therefrom such that respective areas of surfaces receiving paper, and respective distances from respective width guide plates to gear mesh locations, are respectively set so as to be substantially mutually equal. Impacts from stacks of paper produced during placement of paper within a paper supply apparatus may be received substantially equal at upstream and downstream from gear mesh of far-side paper guides, and torques acting on far-side paper guides upstream and downstream from gear mesh locations may be made substantially mutually equal.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: August 24, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidetoshi Kaneko, Toshihiko Seike, Masatsugu Ohishi, Kengo Matsuyama
  • Patent number: 7731171
    Abstract: As one embodiment, a paper feeding device is provided with a pickup roller for pulling out an uppermost positioned sheet of loaded sheets, and a paper feeding roller for transporting the sheet pulled out by the pickup roller. Spanning between the pickup roller and the paper feeding roller, a roller belt is provided that is capable of moving relatively in a circumferential direction with respect to an outer circumferential surface of the paper feeding roller. The roller belt obtains rotational drive from the pickup roller.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: June 8, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masatsugu Ohishi, Masaharu Kimura, Norichika Katsura, Yasuaki Fukada
  • Publication number: 20090243188
    Abstract: As one embodiment, a paper feeding device is provided with a pickup roller for pulling out an uppermost positioned sheet of loaded sheets, and a paper feeding roller for transporting the sheet pulled out by the pickup roller. Spanning between the pickup roller and the paper feeding roller, a roller belt is provided that is capable of moving relatively in a circumferential direction with respect to an outer circumferential surface of the paper feeding roller. The roller belt obtains rotational drive from the pickup roller.
    Type: Application
    Filed: March 18, 2009
    Publication date: October 1, 2009
    Inventors: Masatsugu Ohishi, Masaharu Kimura, Norichika Katsura, Yasuaki Fukada
  • Publication number: 20090230608
    Abstract: A paper feeding device 200 provided in an image forming apparatus 1A according to one embodiment of the present invention is provided with a loading member 201 in which sheets P can be stacked and a central bending section 210 configured to upwardly raise a sheet transport direction X central area P2 of the sheet P for sheets P stacked in the loading member 201.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Inventors: Masaharu KIMURA, Masatsugu Ohishi, Masahiko Fujita, Tadasu Taniguchi, Yasuaki Fukada
  • Publication number: 20090189339
    Abstract: A sheet feeding apparatus includes first and second sheet sensors provided in order from upstream to downstream sides in feeding direction on a paper feed path, sheet conveyor roller sets arranged along the path, and a roller controller individually controlling groups of rollers on the upstream and downstream sides of the first sheet sensor, in response to a change in values of output signals from first and second sheet sensors. The roller controller includes an overlapped feeding determining device outputting a determination signal assuming a first value when overlapped feeding occurs and a second value otherwise, in response to the change in values of the output signals from the sensors, an overlapped feeding eliminating device eliminating overlapped feeding by controlling the roller controller upon receiving the determination signal of the first value, and a conveyor roller stopping device stopping the sheet conveyor rollers if the overlapped feeding eliminating process should fail.
    Type: Application
    Filed: January 20, 2009
    Publication date: July 30, 2009
    Inventors: Masatsugu Ohishi, Masaharu Kimura, Norichika Katsura, Masaya Asakawa, Yasuaki Fukada
  • Publication number: 20090142550
    Abstract: In the present glossy paper, an opposite surface of a glossed and smooth image formation surface is rough-surfaced. Therefore, the glossy paper do not adhere together even under the high-temperature and high-humidity environment. In fact, the present invention provides glossy paper which can advantageously achieve a continuous paper feeding in the image forming apparatus regardless of the use environment conditions.
    Type: Application
    Filed: November 6, 2008
    Publication date: June 4, 2009
    Inventors: Masaharu Kimura, Masatsugu Ohishi, Yasuaki Fukada, Masaya Asakawa
  • Patent number: 7540676
    Abstract: A manual sheet feeding mechanism adapted for use in a sheet processing apparatus includes a manual feeding tray and a guiding member. The manual feeding tray is adapted to be mounted on a side wall of the apparatus so as to be pivotable about an axis between an open position and a closed position. The manual feeding tray has a placement surface for placing a sheet to be manually fed into the apparatus. The guiding member is adapted to position a sheet placed on the placement surface and is provided so as to be movable on the placement surface. The manual sheet feeding mechanism also includes a moving member that is adapted, when the manual feeding tray is pivoted toward the closed position, to move the guiding member on the placement surface.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: June 2, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuya Ogawa, Masahiko Fujita, Masatsugu Ohishi, Masaya Asakawa, Yasuaki Fukada, Tadasu Taniguchi, Masaharu Kimura, Rei Nakamura, Norichika Katsura
  • Publication number: 20080237978
    Abstract: A feeding device according to the present invention holds a pile of sheets of paper in it. Feed force so acts selectively on a specified region of the upper side of the held top sheet as to feed the held sheets one after one in a feed direction. The feeding device includes a flat press plate and a support. The press plate is not smaller in the feed direction and the cross directions perpendicular to the feed direction than the maximum size of the sheets which can be held in the main body. The press plate is not larger in the feed and cross directions than the inner size of the main body. The press plate has a first opening formed over the specified region. The press plate is supported vertically movably above the held sheets by the support.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 2, 2008
    Inventors: Masaharu KIMURA, Tadasu Taniguchi, Masahiko Fujita, Norichika Katsura, Masatsugu Ohishi, Masaya Asakawa, Yasuaki Fukada, Toyoaki Nanba
  • Publication number: 20080197561
    Abstract: A feeding device according to the present invention includes a box, paper holders, and a shifting mechanism. The box is open at Its top. The paper holders are open at their tops and positioned in the box. Each of the paper holders holds a pile of sheets of paper in it. The shifting mechanism so shifts at least one of the paper holders that the top sheet in one of the paper holders is positioned in a single freed position in the box according to selection data output from the apparatus with which the feeding device is used.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 21, 2008
    Inventors: Masaya Asakawa, Masahiko Fujita, Tadasu Taniguchi, Masatsugu Ohishi, Masaharu Kimura, Yasuaki Fukada, Norichika Katsura, Yasuhiro Takai