Patents by Inventor Masaki Amemiya
Masaki Amemiya 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: 10865061Abstract: A driving force transmission mechanism includes a first transmission member and a second transmission member that are arranged on an identical rotational center axis. The first transmission member includes one or more transmission claws engaged with the second transmission member. The transmission claw includes, at a position away from the rotational center axis, a fixing portion with respect to the first transmission member, and extends in a direction crossing a direction directed from the fixing portion to the rotational center axis. The second transmission member includes one or more stoppers engaged with a tip end of the transmission claw and one or more holding portions engaged with a side of the transmission claw, which faces the rotational center axis.Type: GrantFiled: January 7, 2019Date of Patent: December 15, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Masaki Amemiya, Norio Tomita
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Patent number: 10563694Abstract: A sliding bearing is made of a resin and includes a tubular portion that includes an outer peripheral surface including a D-cut surface. A flange portion, which protrudes from the D-cut surface, is formed at one end portion of the tubular portion. An engagement portion is formed at the other end portion of the tubular portion. A protruding portion is formed on the outer peripheral surface of the tubular portion at a circumferential position that is outside a region in which the D-cut surface is formed and that is outside a region in which the engagement portion is formed.Type: GrantFiled: June 21, 2017Date of Patent: February 18, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Zhaotong Li, Norio Tomita, Masaki Amemiya
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Patent number: 10509363Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: GrantFiled: March 12, 2019Date of Patent: December 17, 2019Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Publication number: 20190210822Abstract: A driving force transmission mechanism includes a first transmission member and a second transmission member that are arranged on an identical rotational center axis. The first transmission member includes one or more transmission claws engaged with the second transmission member. The transmission claw includes, at a position away from the rotational center axis, a fixing portion with respect to the first transmission member, and extends in a direction crossing a direction directed from the fixing portion to the rotational center axis. The second transmission member includes one or more stoppers engaged with a tip end of the transmission claw and one or more holding portions engaged with a side of the transmission claw, which faces the rotational center axis.Type: ApplicationFiled: January 7, 2019Publication date: July 11, 2019Inventors: MASAKI AMEMIYA, NORIO TOMITA
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Publication number: 20190212696Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: ApplicationFiled: March 12, 2019Publication date: July 11, 2019Inventors: Hirokazu NAKAMURA, Kimihide TSUKAMOTO, Masaki AMEMIYA
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Patent number: 10268159Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: GrantFiled: February 6, 2018Date of Patent: April 23, 2019Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Publication number: 20180164742Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: ApplicationFiled: February 6, 2018Publication date: June 14, 2018Inventors: Hirokazu NAKAMURA, Kimihide TSUKAMOTO, Masaki AMEMIYA
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Patent number: 9910408Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: GrantFiled: November 3, 2016Date of Patent: March 6, 2018Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Publication number: 20170370408Abstract: A sliding bearing is made of a resin and includes a tubular portion that includes an outer peripheral surface including a D-cut surface. A flange portion, which protrudes from the D-cut surface, is formed at one end portion of the tubular portion. An engagement portion is formed at the other end portion of the tubular portion. A protruding portion is formed on the outer peripheral surface of the tubular portion at a circumferential position that is outside a region in which the D-cut surface is formed and that is outside a region in which the engagement portion is formed.Type: ApplicationFiled: June 21, 2017Publication date: December 28, 2017Inventors: ZHAOTONG LI, NORIO TOMITA, MASAKI AMEMIYA
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Patent number: 9658588Abstract: A set of adjustment pattern images includes first adjustment pattern images and second adjustment pattern images to be formed on a first side and a second side of a recording sheet, respectively, by an image forming apparatus. The set of adjustment pattern images is employed to adjust an image forming position by the image forming apparatus such that an image forming position of the first adjustment pattern images is aligned with an image forming position of the second adjustment pattern images. The set of adjustment pattern images includes at least two first adjustment pattern images that are spaced from each other and at least two second adjustment pattern images that are spaced from each other, and the first adjustment pattern images on the first side and the second adjustment pattern images on the second side are arranged alternately with each other.Type: GrantFiled: June 2, 2014Date of Patent: May 23, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Norio Tomita, Yoshikazu Harada, Yuji Kumagai, Masaki Amemiya
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Publication number: 20170075302Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: ApplicationFiled: November 3, 2016Publication date: March 16, 2017Inventors: Hirokazu NAKAMURA, Kimihide TSUKAMOTO, Masaki AMEMIYA
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Patent number: 9519267Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: GrantFiled: March 2, 2016Date of Patent: December 13, 2016Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Publication number: 20160179054Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: ApplicationFiled: March 2, 2016Publication date: June 23, 2016Inventors: Hirokazu NAKAMURA, Kimihide TSUKAMOTO, Masaki AMEMIYA
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Patent number: 9317010Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: GrantFiled: March 13, 2013Date of Patent: April 19, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Patent number: 9164434Abstract: 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: GrantFiled: December 9, 2014Date of Patent: October 20, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Hirokazu Nakamura, Masatsugu Ohishi, Noriko Inoue, Masaki Amemiya, Masaya Asakawa, Takashi Yamanaka
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Publication number: 20150093135Abstract: 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: ApplicationFiled: December 9, 2014Publication date: April 2, 2015Applicant: SHARP KABUSHIKI KAISHAInventors: Hirokazu NAKAMURA, Masatsugu OHISHI, Noriko INOUE, Masaki AMEMIYA, Masaya ASAKAWA, Takashi YAMANAKA
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Publication number: 20150063858Abstract: Disclosed is an image forming apparatus including: a printing paper transport path in which printing paper is transported; a secondary transfer unit and a fixing section both disposed on the printing paper transport path; an open/close cover that, when opened, exposes the printing paper transport path in a main body of the apparatus; a pressure roller, disposed in the fixing section, that presses the printing paper on a side thereof facing the open/close cover against the printing paper transport path; and cooling fans that cool down the pressure roller, wherein the secondary transfer unit and the cooling fans are attached to the open/close cover and disposed at such positions that the secondary transfer unit and the cooling fans move following overlapping paths when the open/close cover is opened/closed.Type: ApplicationFiled: March 13, 2013Publication date: March 5, 2015Applicant: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Kimihide Tsukamoto, Masaki Amemiya
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Patent number: 8948670Abstract: 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: GrantFiled: May 12, 2011Date of Patent: February 3, 2015Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Masatsugu Ohishi, Noriko Inoue, Masaki Amemiya, Masaya Asakawa, Takashi Yamanaka
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Publication number: 20140363177Abstract: A set of adjustment pattern images includes first adjustment pattern images and second adjustment pattern images to be formed on a first side and a second side of a recording sheet, respectively, by an image forming apparatus. The set of adjustment pattern images is employed to adjust an image forming position by the image forming apparatus such that an image forming position of the first adjustment pattern images is aligned with an image forming position of the second adjustment pattern images. The set of adjustment pattern images includes at least two first adjustment pattern images that are spaced from each other and at least two second adjustment pattern images that are spaced from each other, and the first adjustment pattern images on the first side and the second adjustment pattern images on the second side are arranged alternately with each other.Type: ApplicationFiled: June 2, 2014Publication date: December 11, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Norio TOMITA, Yoshikazu HARADA, Yuji KUMAGAI, Masaki AMEMIYA
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Patent number: 8634732Abstract: An image forming apparatus includes a fixing roller, a heating section, a pressurizing roller, an oil roller, a first cleaning roller, and a control section. The pressurizing roller is pressed against the fixing roller. The oil roller abuts against the fixing roller and is capable of being rotated by rotation of the fixing roller to apply oil onto a surface of the fixing roller. The first cleaning roller abuts against the oil roller and is capable of being rotated by rotation of the oil roller to clean a surface of the oil roller. When the control section determines that the fixing roller and the pressurizing roller have performed fixing on a predetermined number and more of consecutive sheet surfaces, the control section carries out a first control process which causes the heating section to stop and the fixing roller to rotate for a first predetermined time period after the fixing.Type: GrantFiled: November 9, 2011Date of Patent: January 21, 2014Assignee: Sharp Kabushiki KaishaInventors: Masaki Amemiya, Yasunori Minakuchi