Patents by Inventor Takayuki Ryu
Takayuki Ryu 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: 9310745Abstract: An image forming apparatus includes a rotating fixing unit, a switching unit, and a control unit. The rotating fixing unit has a surface, the surface fixing a toner image on a recording medium by contacting the recording medium. The switching unit switches between transportation directions in which the recording sheet is transported such that an orientation of a predetermined side of the recording medium with respect to the fixing unit matches either an orientation corresponding to a first direction in which the central axis of the fixing unit extends or an orientation corresponding to a second direction that is perpendicular to the first direction. The control unit controls the switching unit such that the recording medium is transported in a direction corresponding to a smaller one of integration values obtained along the first direction and the second direction.Type: GrantFiled: January 9, 2014Date of Patent: April 12, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Jota Kobayashi, Yasutaka Goto, Koji Okabe, Yuki Kubota, Takayuki Ryu, Kenji Sawai
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Patent number: 9280105Abstract: A fixing device includes a pressing member that is rotatably held and provides a pressure acting in one direction; a heating member that is rotatably held, faces the pressing member, and includes a substantially cylindrical member and a heating unit, the substantially cylindrical member receiving the pressure, the heating unit being provided inside the substantially cylindrical member, the heating member fixing a toner image on a sheet with the pressure and heat; a drive source that outputs a driving force with which the heating member is rotated; and a transmission member having a space that receives an end of the substantially cylindrical member with a gap interposed therebetween, the transmission member having an inner circumferential surface that comes into contact with the end of the substantially cylindrical member in the space when the substantially cylindrical member receives the pressure, the transmission member transmitting the driving force to the heating member.Type: GrantFiled: August 23, 2012Date of Patent: March 8, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Takayuki Ryu, Yasutaka Gotoh, Koji Okabe, Yuki Kubota
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Patent number: 8971777Abstract: A fixing device includes: a cylinder member that rotates in a circumferential direction thereof; a circulating member that circularly moves in a circumferential direction thereof and is pressed against the cylinder member; a heat source that heats a recording medium holding an unfixed toner image and nipped between the cylinder member and the circulating member; and a pressing member provided inside the circulating member, and including a nip forming portion that presses the circulating member against the cylinder member to form a nip region therebetween, and a thrusting portion that thrusts, upstream of the nip forming portion in a moving direction of the circulating member, and from inside the circulating member toward the cylinder member, the circulating member before being pressed against the cylinder member such that the thrust is greater in end portions of the circulating member than in a central portion of the circulating member.Type: GrantFiled: August 8, 2012Date of Patent: March 3, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Takayuki Ryu, Yasutaka Gotoh, Yuki Kubota, Koji Okabe, Jouta Kobayashi
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Publication number: 20140355018Abstract: An image forming apparatus includes a rotating fixing unit, a switching unit, and a control unit. The rotating fixing unit has a surface, the surface fixing a toner image on a recording medium by contacting the recording medium. The switching unit switches between transportation directions in which the recording sheet is transported such that an orientation of a predetermined side of the recording medium with respect to the fixing unit matches either an orientation corresponding to a first direction in which the central axis of the fixing unit extends or an orientation corresponding to a second direction that is perpendicular to the first direction. The control unit controls the switching unit such that the recording medium is transported in a direction corresponding to a smaller one of integration values obtained along the first direction and the second direction.Type: ApplicationFiled: January 9, 2014Publication date: December 4, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Jota KOBAYASHI, Yasutaka GOTO, Koji OKABE, Yuki KUBOTA, Takayuki RYU, Kenji SAWAI
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Patent number: 8862040Abstract: A fixing device includes a fixing member that is rotatable and heated by a heater; an endless belt member that is rotatable while being in contact with the fixing member; and a pressing member that is disposed inside of the belt member. The pressing member presses the fixing member with the belt member therebetween so as to form a fixing nip between the fixing member and the belt member, the fixing nip allowing a recording medium to pass therethrough to fix a toner image onto the recording medium. In an output region of the fixing nip from which the recording medium is output from the fixing nip, a curvature of a cross-sectional shape of an end portion of the belt member in a width direction is larger than a curvature of a cross-sectional shape of a middle portion of the belt member in the width direction.Type: GrantFiled: July 19, 2012Date of Patent: October 14, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Koji Okabe, Yasutaka Gotoh, Yuki Kubota, Takayuki Ryu
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Publication number: 20130259544Abstract: A fixing device includes a pressing member that is rotatably held and provides a pressure acting in one direction; a heating member that is rotatably held, faces the pressing member, and includes a substantially cylindrical member and a heating unit, the substantially cylindrical member receiving the pressure, the heating unit being provided inside the substantially cylindrical member, the heating member fixing a toner image on a sheet with the pressure and heat; a drive source that outputs a driving force with which the heating member is rotated; and a transmission member having a space that receives an end of the substantially cylindrical member with a gap interposed therebetween, the transmission member having an inner circumferential surface that comes into contact with the end of the substantially cylindrical member in the space when the substantially cylindrical member receives the pressure, the transmission member transmitting the driving force to the heating member.Type: ApplicationFiled: August 23, 2012Publication date: October 3, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Takayuki RYU, Yasutaka GOTOH, Koji OKABE, Yuki KUBOTA
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Publication number: 20130251420Abstract: A fixing device includes a fixing member that is rotatable and heated by a heater; an endless belt member that is rotatable while being in contact with the fixing member; and a pressing member that is disposed inside of the belt member. The pressing member presses the fixing member with the belt member therebetween so as to form a fixing nip between the fixing member and the belt member, the fixing nip allowing a recording medium to pass therethrough to fix a toner image onto the recording medium. In an output region of the fixing nip from which the recording medium is output from the fixing nip, a curvature of a cross-sectional shape of an end portion of the belt member in a width direction is larger than a curvature of a cross-sectional shape of a middle portion of the belt member in the width direction.Type: ApplicationFiled: July 19, 2012Publication date: September 26, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Koji OKABE, Yasutaka Gotoh, Yuki Kubota, Takayuki Ryu
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Publication number: 20130251421Abstract: A fixing device includes: a cylinder member that rotates in a circumferential direction thereof; a circulating member that circularly moves in a circumferential direction thereof and is pressed against the cylinder member; a heat source that heats a recording medium holding an unfixed toner image and nipped between the cylinder member and the circulating member; and a pressing member provided inside the circulating member, and including a nip forming portion that presses the circulating member against the cylinder member to form a nip region therebetween, and a thrusting portion that thrusts, upstream of the nip forming portion in a moving direction of the circulating member, and from inside the circulating member toward the cylinder member, the circulating member before being pressed against the cylinder member such that the thrust is greater in end portions of the circulating member than in a central portion of the circulating member.Type: ApplicationFiled: August 8, 2012Publication date: September 26, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Takayuki RYU, Yasutaka GOTOH, Yuki KUBOTA, Koji OKABE, Jouta KOBAYASHI