Patents by Inventor Yasuhide Ohkubo
Yasuhide Ohkubo 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).
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Patent number: 8356813Abstract: A paper feeder assembly for an image forming apparatus is configured to sandwich a sheet of paper between a roller and an opposing pressing member and feed the sheet of paper by the roller being rotated. The paper feeder assembly includes a pressure variable member for varying pressurized contact force between the roller and the pressing member. In conjunction with ON/OFF action of a power supply switch provided in a main body of the image forming apparatus, the pressure variable member ensures pressurized contact force enough to fix an image when the power supply switch is turned on, whereas the pressure variable member operates to separate the roller and the pressing member from each other when the power supply switch is turned off.Type: GrantFiled: February 28, 2011Date of Patent: January 22, 2013Assignee: Ricoh Company, Ltd.Inventor: Yasuhide Ohkubo
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Publication number: 20130004222Abstract: A mechanism for guiding a recording medium into a nip formed between a first rotary member subjected to heating, and a second rotary member pressed against the first rotary member includes a guide member and a biasing member. The guide member is disposed upstream from the nip to guide the recording medium therealong. The biasing member is connected to the guide member to mechanically bias the guide member. The guide member is subjected to a constant biasing force from the biasing member and to a pressure force from the recording medium. The pressure force is opposite the biasing force and variable with a stiffness of the recording medium being guided. The guide member is movable to different operational positions depending on the biasing and pressure forces acting thereon.Type: ApplicationFiled: June 28, 2012Publication date: January 3, 2013Applicant: RICOH COMPANY, LTD.Inventors: Kohta Sakaya, Yasuhide Ohkubo, Tamotsu Ikeda, Yoshiharu Takahashi, Chikara Hiraoka, Toshio Ogiso
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Patent number: 8320798Abstract: A conveying device conveys a sheet of non-blank recording medium recorded with an image formed in an image forming unit, and includes a container that is detachable and contains a sheet of blank recording medium, a feeding unit that feeds the blank recording medium from the container, and a recirculating path that leads the non-blank recording medium to the feeding unit. The recirculating path is disposed lateral to the image forming unit. A part of the recirculating path is integrated into the container and forms a reversing path that leads to the feeding unit. At least one of surfaces of the reversing path can be exposed.Type: GrantFiled: September 15, 2011Date of Patent: November 27, 2012Assignee: Ricoh Company, Ltd.Inventors: Shigeo Nanno, Hiroshi Fujiwara, Yasuhide Ohkubo, Ippei Kimura, Yoshihide Ohta, Tomoyoshi Yamazaki, Masafumi Takahira
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Patent number: 8256769Abstract: A sheet discharge roller has a contact portion in contact with a feed roller and a noncontact portion not in contact with the feed roller. The sheet discharge roller includes a kick-out unit having a projected portion and a recess portion on one end of the noncontact portion in the circumferential direction. A reverse roller also has a contact portion in contact with the feed roller and a noncontact portion not in contact with the feed roller. The reverse roller includes a large-diameter portion on its one end in a direction opposite to a direction of the kick-out unit. The large-diameter portion has a diameter larger than a diameter of the contact portion.Type: GrantFiled: April 25, 2011Date of Patent: September 4, 2012Assignee: Ricoh Company, Ltd.Inventors: Masafumi Takahira, Hiroshi Fujiwara, Shigeo Nanno, Yasuhide Ohkubo, Ippei Kimura, Mizuna Tanaka, Toshikane Nishii, Haruyuki Honda, Tomoyoshi Yamazaki
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Patent number: 8260187Abstract: An image forming device is disclosed. The device includes a toner-image forming unit which forms a toner image; a transfer unit; a fixing unit; a paper-output unit; a drive unit; a first drive-power transmission gear; a second drive-power transmission gear; a gear housing; a first positioning unit which positions the fixing unit relative to a device body; and a second positioning unit. The second positioning unit positions the paper-output unit relative to the device body in the direction of a gap between the first drive-power transmission gear and the second drive-power transmission gear by engaging the gear housing with the device body.Type: GrantFiled: October 22, 2008Date of Patent: September 4, 2012Assignee: Ricoh Company, Ltd.Inventors: Haruyuki Honda, Yasuo Matsuyama, Hiroshi Fujiwara, Kazuyoshi Kondo, Yasuhide Ohkubo, Ippei Kimura, Toshikane Nishii, Mizuna Tanaka, Tomoyoshi Yamazaki, Masafumi Takahira
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Patent number: 8240657Abstract: A sheet feeding device includes a sheet feeding member, a friction separation member, a retaining member, a downstream guiding member, and a biasing member. The downstream guiding member is arranged downstream of a sheet conveyance direction than the friction separation member such that its guide surface is inclined at a predetermined angle to a front surface of the friction separation member towards the sheet feeding member. A line joining an apex of a sheet guiding member arranged upstream of the sheet conveyance direction than the friction separation member and an apex of the downstream guiding unit is positioned towards the sheet feeding member than a contact portion of the sheet feeding member and the friction separation member.Type: GrantFiled: October 23, 2008Date of Patent: August 14, 2012Assignee: Ricoh Company, Ltd.Inventors: Mizuna Tanaka, Hiroshi Fujiwara, Yasuo Matsuyama, Kazuyoshi Kondo, Toshikane Nishii, Ippei Kimura, Tomoyoshi Yamazaki, Haruyuki Honda, Yasuhide Ohkubo, Masafumi Takahira, Ikuo Fujii
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Publication number: 20120104685Abstract: An open/close mechanism can be used for paper trays of an image forming apparatus. The open/close mechanism includes a plate member provided on a side of a housing of the image forming apparatus and configured to pivot upon an axis between an open position and a close position, and a box member that is arranged in the housing beneath the plate member and that can be drawn out of the housing from the side. The open/close mechanism includes also includes a restricting unit that is coupled to the plate member and that abuts against the box member when the box member is set in the housing and when the plate member is in the open position thereby restricting detachment of the box member from the housing.Type: ApplicationFiled: January 12, 2012Publication date: May 3, 2012Applicant: Ricoh Company, Ltd.Inventors: Toshikane NISHII, Kazuhiro Wakamatsu, Yasuhide Ohkubo, Ippei Kimura, Mizuna Tanaka, Haruyuki Honda, Masafumi Takahira, Hiroshi Fujiwara
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Patent number: 8118296Abstract: An open/close mechanism can be used for paper trays of an image forming apparatus. The open/close mechanism includes a plate member provided on a side of a housing of the image forming apparatus and configured to pivot upon an axis between an open position and a close position, and a box member that is arranged in the housing beneath the plate member and that can be drawn out of the housing from the side. The open/close mechanism includes also includes a restricting unit that is coupled to the plate member and that abuts against the box member when the box member is set in the housing and when the plate member is in the open position thereby restricting detachment of the box member from the housing.Type: GrantFiled: April 16, 2010Date of Patent: February 21, 2012Assignee: Ricoh Company, Ltd.Inventors: Toshikane Nishii, Kazuhiro Wakamatsu, Yasuhide Ohkubo, Ippei Kimura, Mizuna Tanaka, Haruyuki Honda, Masafumi Takahira, Hiroshi Fujiwara
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Publication number: 20120007307Abstract: A conveying device conveys a sheet of non-blank recording medium recorded with an image formed in an image forming unit, and includes a container that is detachable and contains a sheet of blank recording medium, a feeding unit that feeds the blank recording medium from the container, and a recirculating path that leads the non-blank recording medium to the feeding unit. The recirculating path is disposed lateral to the image forming unit. A part of the recirculating path is integrated into the container and forms a reversing path that leads to the feeding unit. At least one of surfaces of the reversing path can be exposed.Type: ApplicationFiled: September 15, 2011Publication date: January 12, 2012Inventors: Shigeo NANNO, Hiroshi FUJIWARA, Yasuhide OHKUBO, Ippei KIMURA, Yoshihide OHTA, Tomoyoshi YAMAZAKI, Masafumi TAKAHIRA
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Patent number: 8070159Abstract: In a color printer in which a drive force of a fixed gear that rotates not in both a forward direction and a reverse direction but in either one direction only is transmitted to a discharging unit, a swing gear is attached to a branch guide via a switching link and a transmission link as a link mechanism. When a solenoid mechanism starts driving, the transmission link rotates. In accordance with the rotation of the transmission link, the switching link rotates, so that a switching among a discharge conveying path, a duplex-printing conveying path, and a switchback conveying path by the branch guide and a switching of a rotating direction of a transmission gear can be simultaneously performed.Type: GrantFiled: February 7, 2011Date of Patent: December 6, 2011Assignee: Ricoh Company, LimitedInventors: Haruyuki Honda, Hiroshi Fujiwara, Yasuhide Ohkubo, Ippei Kimura, Toshikane Nishii, Shigeo Nanno, Mizuna Tanaka, Tomoyoshi Yamazaki, Masafumi Takahira
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Patent number: 8045888Abstract: A conveying device conveys a sheet of non-blank recording medium recorded with an image formed in an image forming unit, and includes a container that is detachable and contains a sheet of blank recording medium, a feeding unit that feeds the blank recording medium from the container, and a recirculating path that leads the non-blank recording medium to the feeding unit. The recirculating path is disposed lateral to the image forming unit. A part of the recirculating path is integrated into the container and forms a reversing path that leads to the feeding unit. At least one of surfaces of the reversing path can be exposed.Type: GrantFiled: December 12, 2006Date of Patent: October 25, 2011Assignee: Ricoh Company, Ltd.Inventors: Shigeo Nanno, Hiroshi Fujiwara, Yasuhide Ohkubo, Ippei Kimura, Yoshihide Ohta, Tomoyoshi Yamazaki, Masafumi Takahira
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Publication number: 20110221126Abstract: A paper feeder assembly for an image forming apparatus is configured to sandwich a sheet of paper between a roller and an opposing pressing member and feed the sheet of paper by the roller being rotated. The paper feeder assembly includes a pressure variable member for varying pressurized contact force between the roller and the pressing member. In conjunction with ON/OFF action of a power supply switch provided in a main body of the image forming apparatus, the pressure variable member ensures pressurized contact force enough to fix an image when the power supply switch is turned on, whereas the pressure variable member operates to separate the roller and the pressing member from each other when the power supply switch is turned off.Type: ApplicationFiled: February 28, 2011Publication date: September 15, 2011Applicant: Ricoh Company, LimitedInventor: Yasuhide Ohkubo
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Publication number: 20110204556Abstract: A sheet discharge roller has a contact portion in contact with a feed roller and a noncontact portion not in contact with the feed roller. The sheet discharge roller includes a kick-out unit having a projected portion and a recess portion on one end of the noncontact portion in the circumferential direction. A reverse roller also has a contact portion in contact with the feed roller and a noncontact portion not in contact with the feed roller. The reverse roller includes a large-diameter portion on its one end in a direction opposite to a direction of the kick-out unit. The large-diameter portion has a diameter larger than a diameter of the contact portion.Type: ApplicationFiled: April 25, 2011Publication date: August 25, 2011Inventors: Masafumi Takahira, Hiroshi Fujiwara, Shigeo Nanno, Yasuhide Ohkubo, Ippei Kimura, Mizuna Tanaka, Toshikane Nishii, Haruyuki Honda, Tomoyoshi Yamazaki
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Patent number: 7992860Abstract: A sheet feeding device includes a first roller that draws a recording medium at a first position and feeds the recording medium; a friction pad that comes into contact with the first roller with a predetermined contact pressure at a second position that is close to and downstream of the first position in a conveying direction of the recording medium and nips the recording medium with the first roller to convey the recording medium in the conveying direction; and a second roller that comes into contact with the first roller at a third position that is close to and downstream of the second position in the conveying direction and nips the recording medium with the first roller.Type: GrantFiled: May 14, 2009Date of Patent: August 9, 2011Assignee: Ricoh Company, Ltd.Inventors: Ippei Kimura, Yasuo Matsuyama, Hiroshi Fujiwara, Yasuhide Ohkubo, Toshikane Nishii, Mizuna Tanaka, Tomoyoshi Yamazaki, Haruyuki Honda, Masafumi Takahira
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Patent number: 7963520Abstract: A sheet cassette loads and houses therein a plurality of sheets. A separating unit separates the sheets loaded in the sheet cassette one by one. The separating unit is arranged in the sheet cassette in opposite to a feeding roller that conveys the sheets from the sheet cassette. A rib is formed on a rear surface of a bottom plate of the sheet cassette. The rib is pressed by a pressing member.Type: GrantFiled: January 24, 2008Date of Patent: June 21, 2011Assignee: Ricoh Company, LimitedInventors: Mizuna Tanaka, Hiroshi Fujiwara, Shigeo Nanno, Tomoyoshi Yamazaki, Yasuhide Ohkubo, Haruyuki Honda, Ippei Kimura, Masafumi Takahira, Toshikane Nishii
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Patent number: 7954814Abstract: A sheet discharge roller has a contact portion in contact with a feed roller and a noncontact portion not in contact with the feed roller. The sheet discharge roller includes a kick-out unit having a projected portion and a recess portion on one end of the noncontact portion in the circumferential direction. A reverse roller also has a contact portion in contact with the feed roller and a noncontact portion not in contact with the feed roller. The reverse roller includes a large-diameter portion on its one end in a direction opposite to a direction of the kick-out unit. The large-diameter portion has a diameter larger than a diameter of the contact portion.Type: GrantFiled: March 12, 2008Date of Patent: June 7, 2011Assignee: Ricoh Company, Ltd.Inventors: Masafumi Takahira, Hiroshi Fujiwara, Shigeo Nanno, Yasuhide Ohkubo, Ippei Kimura, Mizuna Tanaka, Toshikane Nishii, Haruyuki Honda, Tomoyoshi Yamazaki
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Publication number: 20110127707Abstract: In a color printer in which a drive force of a fixed gear that rotates not in both a forward direction and a reverse direction but in either one direction only is transmitted to a discharging unit, a swing gear is attached to a branch guide via a switching link and a transmission link as a link mechanism. When a solenoid mechanism starts driving, the transmission link rotates. In accordance with the rotation of the transmission link, the switching link rotates, so that a switching among a discharge conveying path, a duplex-printing conveying path, and a switchback conveying path by the branch guide and a switching of a rotating direction of a transmission gear can be simultaneously performed.Type: ApplicationFiled: February 7, 2011Publication date: June 2, 2011Inventors: Haruyuki Honda, Hiroshi Fujiwara, Yasuhide Ohkubo, Ippei Kimura, Toshikane Nishii, Shigeo Nanno, Mizuna Tanaka, Tomoyoshi Yamazaki, Masafumi Takahira
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Patent number: 7918451Abstract: In a color printer in which a drive force of a fixed gear that rotates not in both a forward direction and a reverse direction but in either one direction only is transmitted to a discharging unit, a swing gear is attached to a branch guide via a switching link and a transmission link as a link mechanism. When a solenoid mechanism starts driving, the transmission link rotates. In accordance with the rotation of the transmission link, the switching link rotates, so that a switching among a discharge conveying path, a duplex-printing conveying path, and a switchback conveying path by the branch guide and a switching of a rotating direction of a transmission gear can be simultaneously performed.Type: GrantFiled: April 30, 2008Date of Patent: April 5, 2011Assignee: Ricoh Company, LimitedInventors: Haruyuki Honda, Hiroshi Fujiwara, Yasuhide Ohkubo, Ippei Kimura, Toshikane Nishii, Shigeo Nanno, Mizuna Tanaka, Tomoyoshi Yamazaki, Masafumi Takahira
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Patent number: 7878725Abstract: An image forming apparatus is disclosed. The image forming apparatus includes an apparatus main body, a first unit to be attached inside the apparatus main body, a rotatable part attached to the apparatus main body and rotatable between an open position for opening the apparatus main body and a closed position for closing the apparatus main body, and a second unit removably attached to the rotatable part. When the rotatable part is rotated from the closed position to the open position, the first unit is allowed to be attached to or removed from the apparatus main body by being moved horizontally. By removing the second unit from the rotatable part, the first unit is attached to or removed from the apparatus main body without coming into contact with the second unit.Type: GrantFiled: June 12, 2007Date of Patent: February 1, 2011Assignee: Ricoh Company, Ltd.Inventors: Yasuhide Ohkubo, Hiroshi Fujiwara, Shigeo Nanno, Ippei Kimura, Yoshihide Ohta, Tomoyoshi Yamazaki, Masafumi Takahira, Haruyuki Honda
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Publication number: 20100276874Abstract: An adjusting member is positioned in a sheet feeding opening. The adjusting member is adjusted according to the size of the paper sheet. The adjusting member does not jut out of an exterior surface of an apparatus body.Type: ApplicationFiled: July 14, 2010Publication date: November 4, 2010Inventors: Shigeo Nanno, Yasuhide Ohkubo, Ippei Kimura, Yoshihide Ohta, Tomoyoshi Yamazaki, Haruyuki Honda