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1. 发明申请

US20230008258A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230008258A1
公开(公告)日：2023-01-12
申请号：US17852381
申请日：2022-06-29
申请人： Hiromasa TAKAGI , Seiji SAITOH , Jun OKAMOTO , Tamotsu IKEDA , Yoshikuni SASAKI , Takahiro IMADA
发明人： Hiromasa TAKAGI , Seiji SAITOH , Jun OKAMOTO , Tamotsu IKEDA , Yoshikuni SASAKI , Takahiro IMADA
IPC分类号： G03G21/20 , G03G15/20 , G03G15/00
摘要： An image forming apparatus includes two rotators, a driver driving the rotators, a heating device to heat the rotator, a blower blowing air to the heating device, a temperature detector, a recording medium detector, a cover, an open-close detector, and circuitry. The circuitry detects an abnormal state and stops heat generation, determines whether the cover is closed using the open-close detector, controls the blower to blow air when the cover is closed, determines whether the recording medium is in the nip using the recording medium detector, controls the driver to rotate the two rotators when the cover is closed and no recording medium is in the nip, determines whether a temperature detected is equal to or lower than a threshold value before the cover is opened, and controls the blower to decrease an air volume when the temperature detected is equal to or lower than the threshold value.

2. 发明申请

US20230004107A1 CONTACT-SEPARATION DEVICE, FIXING DEVICE, AND IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230004107A1
公开(公告)日：2023-01-05
申请号：US17825471
申请日：2022-05-26
申请人： Seiji SAITOH , Takahiro IMADA , Yoshikuni SASAKI , Tamotsu IKEDA , Hiromasa TAKAGI , Jun OKAMOTO
发明人： Seiji SAITOH , Takahiro IMADA , Yoshikuni SASAKI , Tamotsu IKEDA , Hiromasa TAKAGI , Jun OKAMOTO
IPC分类号： G03G15/20
摘要： A contact-separation device brings a contact-separation member into contact with a contacted member separably and includes a biasing member that generates a biasing force. A presser presses the contact-separation member against the contacted member in a pressing direction with the biasing force from the biasing member. A cam presses the presser in an opposite direction being opposite to the pressing direction. The cam is rotatable and has a cam face. A cam follower has a cam contact face that contacts the cam face of the cam. The cam contact face is curved to project toward the cam. The cam contact face has a curvature that is smaller than a greatest curvature of the cam face of the cam and is greater than a smallest curvature of the cam face of the cam.

3. 发明授权

US10852671B2 Fixing device including a cleaner to clean a surface of a cleaning target and image forming apparatus incorporating same 有权
公开(公告)号：US10852671B2
公开(公告)日：2020-12-01
申请号：US16675912
申请日：2019-11-06
申请人： Takahiro Imada , Yoshio Hattori , Yoshikuni Sasaki , Hironori Yamaoka , Yasunori Ishigaya , Takumi Waida
发明人： Takahiro Imada , Yoshio Hattori , Yoshikuni Sasaki , Hironori Yamaoka , Yasunori Ishigaya , Takumi Waida
IPC分类号： G03G15/20
摘要： A fixing device includes a fixing rotator, a pressure rotator, a cleaner, and a moving assembly. The cleaner contacts and cleans a cleaning target, which includes one of the fixing rotator and the pressure rotator. The moving assembly moves the cleaner between a contact position at which the cleaner contacts the cleaning target and a separate position at which the cleaner is apart from the cleaning target. The moving assembly includes a biasing member that presses the cleaner to move to the contact position. The moving assembly moves the cleaner from the contact position to the separate position against a biasing force of the biasing member. The moving assembly moves the cleaner from the separate position to the contact position while increasing and then decreasing the biasing force of the biasing member greater than the biasing force applied when the cleaner is located at the contact position.

4. 发明授权

US09817345B2 Fixing device, image forming apparatus, and method of controlling fixing device 有权
公开(公告)号：US09817345B2
公开(公告)日：2017-11-14
申请号：US15352782
申请日：2016-11-16
申请人： Motoyoshi Yamano , Tetsuo Tokuda , Yoshikuni Sasaki , Hiroshi Ono , Hironori Yamaoka , Ryohhei Sugiyama , Kohichi Utsunomiya , Arinobu Yoshiura , Hideo Nagafuji
发明人： Motoyoshi Yamano , Tetsuo Tokuda , Yoshikuni Sasaki , Hiroshi Ono , Hironori Yamaoka , Ryohhei Sugiyama , Kohichi Utsunomiya , Arinobu Yoshiura , Hideo Nagafuji
IPC分类号： G03G15/20
CPC分类号： G03G15/2039 , G03G15/2032 , G03G15/2064
摘要： A fixing device includes a heater, a fixing rotator, a pressure rotator to press against the fixing rotator to form a fixing nip between the fixing rotator and the pressure rotator, through which a recording medium is conveyed, a moving device to move the pressure rotator in directions in which the pressure rotator comes into contact with and separates from the fixing rotator, a thermal expansion amount predictor to predict an amount of thermal expansion of the fixing rotator while the recording medium is conveyed, and a nip width adjuster to control a moving distance of the pressure rotator moved by the moving device toward the fixing rotator, depending on the amount of thermal expansion of the fixing rotator predicted by the thermal expansion amount predictor, so as to adjust a width of the fixing nip to maintain a substantially constant width of the fixing nip.

5. 发明申请

US20170131666A1 IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD 审中-公开
公开(公告)号：US20170131666A1
公开(公告)日：2017-05-11
申请号：US15293881
申请日：2016-10-14
申请人： Ryohhei SUGIYAMA , Hiroshi ONO , Hironori YAMAOKA , Motoyoshi YAMANO , Yoshikuni SASAKI , Tetsuo TOKUDA
发明人： Ryohhei SUGIYAMA , Hiroshi ONO , Hironori YAMAOKA , Motoyoshi YAMANO , Yoshikuni SASAKI , Tetsuo TOKUDA
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： An image forming apparatus includes a fixing rotator rotatable in a predetermined direction of rotation, over which a recording medium is conveyed, and a heater to heat the fixing rotator. A temperature detector detects a temperature of the fixing rotator. A controller performs a primary productivity control to define a primary productivity rate of printing per unit time based on the temperature of the fixing rotator that is detected by the temperature detector. The controller calculates an amount of power suppliable to the heater and performs a secondary productivity control simultaneously with and separately from the primary productivity control. The secondary productivity control defines a secondary productivity rate of printing per unit time based on the amount of power suppliable to the heater. The controller selects one of the primary conductivity rate and the secondary productivity rate whichever is lower as a productivity rate of the image forming apparatus.

6. 发明申请

US20080080912A1 Fixing apparatus and image forming apparatus using it 有权
标题翻译：固定装置和使用它的成像装置
公开(公告)号：US20080080912A1
公开(公告)日：2008-04-03
申请号：US11905359
申请日：2007-09-28
申请人： Sho Sawahata , Yuji Ohmura , Yoshikuni Sasaki
发明人： Sho Sawahata , Yuji Ohmura , Yoshikuni Sasaki
IPC分类号： G03G15/20
CPC分类号： G03G15/2057
摘要： According to an aspect of the present invention, there is provided a fixing apparatus including: a heat roller that includes: a heat source that generates heat to be supplied on a toner image formed on a recording medium; a cylindrical core; a rubber layer that is formed on the cylindrical core and includes a thermal-conductivity-enhanced rubber, the rubber layer having a thickness of Tg that satisfies 200 μm ≦Tg ≦600 μm and having a rubber hardness defined by JIS-A hardness of Hg that satisfies 40 degrees ≦Hg ≦80 degrees; and a fluororesin layer that is formed on the rubber layer, the fluororesin layer having a thickness of Tj that satisfies 80 μm ≦Tj≦300 μm and 2 Tj ≦Tg ≦10 Tj; and a pressure roller that presses the recording medium against the heat roller.
摘要翻译：根据本发明的一个方面，提供了一种定影装置，包括：加热辊，其包括：热源，其产生供应到形成在记录介质上的调色剂图像上的热量; 圆柱形芯; 橡胶层，其形成在圆筒形芯上并且包括导热性增强的橡胶，所述橡胶层的Tg的厚度满足200μm<= Tg <=600μm，并且具有由JIS-A硬度的Hg满足40度<= Hg <= 80度; 和形成在所述橡胶层上的氟树脂层，所述氟树脂层的厚度Tj满足80μm<= Tj <=300μm，2Tj <= Tg <= 10Tj; 以及将记录介质压靠在加热辊上的压力辊。

7. 发明申请

US20200159149A1 FIXING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME 审中-公开
公开(公告)号：US20200159149A1
公开(公告)日：2020-05-21
申请号：US16676673
申请日：2019-11-07
申请人： Takumi WAIDA , Yoshio HATTORI , Yasunori ISHIGAYA , Yoshikuni SASAKI , Takahiro IMADA , Hironori YAMAOKA , Hiromasa TAKAGI , Keitaro SHOJI
发明人： Takumi WAIDA , Yoshio HATTORI , Yasunori ISHIGAYA , Yoshikuni SASAKI , Takahiro IMADA , Hironori YAMAOKA , Hiromasa TAKAGI , Keitaro SHOJI
IPC分类号： G03G15/20 , G03G15/02
摘要： A fixing device includes a fixing rotator, a pressure rotator, a cleaner, a moving assembly, and a temperature detector. The fixing rotator heats and fixes a toner image onto a recording medium. The pressure rotator presses against the fixing rotator. The cleaner contacts and cleans a cleaning target, which includes one of the fixing rotator and the pressure rotator. The moving assembly moves the cleaner between a contact position where the cleaner contacts the cleaning target and a separate position where the cleaner is apart from the cleaning target. The temperature detector detects a temperature of one of the cleaner and the cleaning target. The moving assembly moves the cleaner from the contact position to the separate position or from the separate position to the contact position during rotation of the cleaning target, in a case in which the temperature detected is greater than a given value

8. 发明申请

US20200159148A1 FIXING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME 审中-公开
公开(公告)号：US20200159148A1
公开(公告)日：2020-05-21
申请号：US16675912
申请日：2019-11-06
申请人： Takahiro IMADA , Yoshio Hattori , Yoshikuni Sasaki , Hironori Yamaoka , Yasunori Ishigaya , Takumi Waida
发明人： Takahiro IMADA , Yoshio Hattori , Yoshikuni Sasaki , Hironori Yamaoka , Yasunori Ishigaya , Takumi Waida
IPC分类号： G03G15/20
摘要： A fixing device includes a fixing rotator, a pressure rotator, a cleaner, and a moving assembly. The cleaner contacts and cleans a cleaning target, which includes one of the fixing rotator and the pressure rotator. The moving assembly moves the cleaner between a contact position at which the cleaner contacts the cleaning target and a separate position at which the cleaner is apart from the cleaning target. The moving assembly includes a biasing member that presses the cleaner to move to the contact position. The moving assembly moves the cleaner from the contact position to the separate position against a biasing force of the biasing member. The moving assembly moves the cleaner from the separate position to the contact position while increasing and then decreasing the biasing force of the biasing member greater than the biasing force applied when the cleaner is located at the contact position.

9. 发明授权

US10401766B2 Image forming apparatus and image forming method with temperature and power-based productivity rate selection 有权
公开(公告)号：US10401766B2
公开(公告)日：2019-09-03
申请号：US15293881
申请日：2016-10-14
申请人： Ryohhei Sugiyama , Hiroshi Ono , Hironori Yamaoka , Motoyoshi Yamano , Yoshikuni Sasaki , Tetsuo Tokuda
发明人： Ryohhei Sugiyama , Hiroshi Ono , Hironori Yamaoka , Motoyoshi Yamano , Yoshikuni Sasaki , Tetsuo Tokuda
IPC分类号： G03G15/20
摘要： An image forming apparatus includes a fixing rotator rotatable in a predetermined direction of rotation, over which a recording medium is conveyed, and a heater to heat the fixing rotator. A temperature detector detects a temperature of the fixing rotator. A controller performs a primary productivity control to define a primary productivity rate of printing per unit time based on the temperature of the fixing rotator that is detected by the temperature detector. The controller calculates an amount of power suppliable to the heater and performs a secondary productivity control simultaneously with and separately from the primary productivity control. The secondary productivity control defines a secondary productivity rate of printing per unit time based on the amount of power suppliable to the heater. The controller selects one of the primary productivity rate and the secondary productivity rate whichever is lower as a productivity rate of the image forming apparatus.

10. 发明授权

US09316979B2 Fixing device and image forming apparatus 有权
标题翻译：固定装置和成像装置
公开(公告)号：US09316979B2
公开(公告)日：2016-04-19
申请号：US14632523
申请日：2015-02-26
申请人： Kenji Nozawa , Masami Okamoto , Yoshikuni Sasaki , Yuuki Kikushima , Fumihiro Hirose , Keisuke Kubota , Shuutaroh Yuasa , Kaori Hemmi
发明人： Kenji Nozawa , Masami Okamoto , Yoshikuni Sasaki , Yuuki Kikushima , Fumihiro Hirose , Keisuke Kubota , Shuutaroh Yuasa , Kaori Hemmi
IPC分类号： G03G15/20
CPC分类号： G03G15/2085 , G03G15/2025 , G03G15/2028 , G03G15/2053 , G03G2215/2032
摘要： A fixing device includes a first roller contacting a fixing belt to generate a rotation friction force therebetween to rotate the fixing belt and a second roller contacting the fixing belt to exert a first inhibition force to the fixing belt in a direction opposite a direction of rotation of the fixing belt. A separation aid is disposed downstream from a fixing nip formed between the fixing belt and a pressure rotator in the direction of rotation of the fixing belt to decrease a curvature of the fixing belt and exert a second inhibition force to the fixing belt in the direction opposite the direction of rotation of the fixing belt. The second inhibition force is added to the first inhibition force to obtain a combined inhibition force that is smaller than the rotation friction force between the fixing belt and the first roller.
摘要翻译：定影装置包括：第一辊，其与定影带接触以在其间产生旋转摩擦力，以使定影带旋转;以及与定影带接触的第二辊，沿着与定影带的旋转方向相反的方向向定影带施加第一抑制力定影带。分离助剂被设置在定影带和压力旋转体之间形成在定影带的旋转方向上的定影辊隙的下游，以减小定影带的曲率，并沿相反方向向定影带施加第二抑制力定影带的旋转方向。将第二抑制力添加到第一抑制力以获得小于定影带和第一辊之间的旋转摩擦力的组合抑制力。

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