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1. 发明授权

US09658577B2 Image forming apparatus having transfer belt rollers of specific shapes 有权
公开(公告)号：US09658577B2
公开(公告)日：2017-05-23
申请号：US14676035
申请日：2015-04-01
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi , Hiroshi Kokubo , Haruhiko Omata , Takashi Fujita , Hideaki Kosasa
IPC分类号： G03G15/16
CPC分类号： G03G15/1605 , G03G15/167 , G03G2215/1623
摘要： An image forming apparatus includes: an image bearing member; a toner image forming unit; an endless transfer belt; a transfer roller urged from an inner peripheral surface of the transfer belt toward the image bearing member via the transfer belt; a feeding surface forming roller, provided downstream of the transfer roller with respect to a traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is smaller than a diameter at a central portion with respect to a rotational axis direction; and a stretching roller, downstream of the feeding surface forming roller with respect to the traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is larger than a diameter at a central portion with respect to the rotational axis direction.

2. 发明申请

US20130279931A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20130279931A1
公开(公告)日：2013-10-24
申请号：US13923161
申请日：2013-06-20
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi
IPC分类号： G03G15/16
CPC分类号： G03G15/16 , G03G15/1605 , G03G15/657 , G03G2215/00447 , G03G2215/00481 , G03G2215/00485 , G03G2215/0129 , G03G2215/1623
摘要： In an image forming apparatus that separates a thin recording material by pushing up a transfer belt, if a position where a thick recording material separates from the transfer belt is far from a leading end of a recording-material guide, conveyability of the separated thick recording material after separation becomes stable. A stretching member is provided downstream of a push-up means and upstream of the recording-material guide in a recording-material conveying direction, and the stretching member separates a thick recording material from the transfer belt.
摘要翻译：在通过推动转印带分离薄记录材料的图像形成装置中，如果厚的记录材料与转印带分离的位置远离记录材料引导件的前端，则分离的厚记录的输送性分离后的材料变得稳定。在记录材料传送方向上，在上推装置的下游和记录材料导向件的上游设置有拉伸件，并且拉伸件从转印带分离出厚的记录材料。

3. 发明申请

US20230130018A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20230130018A1
公开(公告)日：2023-04-27
申请号：US17971207
申请日：2022-10-21
申请人： CANON KABUSHIKI KAISHA
发明人： Ryosuke Tsuruga , Manato Kobayashi , Yutaka Kakehi
IPC分类号： G03G15/16
摘要： An image forming apparatus includes an image forming portion, a rotatable endless belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, a guiding member, a sheet-like pressing member, and a coating member. The coating member is disposed on the pressing member so as not to contact the belt and is electrically grounded or electrically conducted to the guiding member. The coating member is formed of a material lower in surface resistivity than the pressing member.

4. 发明授权

US11500309B2 Image forming apparatus 有权
公开(公告)号：US11500309B2
公开(公告)日：2022-11-15
申请号：US17347900
申请日：2021-06-15
申请人： CANON KABUSHIKI KAISHA
发明人： Ryosuke Tsuruga , Yutaka Kakehi , Tatsuya Kohno , Manato Kobayashi
IPC分类号： G03G15/16
摘要： An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.

5. 发明授权

US09804535B2 Image forming apparatus 有权
公开(公告)号：US09804535B2
公开(公告)日：2017-10-31
申请号：US15175583
申请日：2016-06-07
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi
IPC分类号： G03G15/16
CPC分类号： G03G15/161 , G03G15/1615
摘要： An image forming apparatus includes a movable endless belt, an image forming unit, a plurality of rollers including a first roller and a second roller, and an urging member. The urging member is provided on an inner peripheral surface side at a position which is adjacent to and upstream of the first roller and which is downstream of the second roller with respect to a movement direction of the belt. The urging member is supported at an upstream end portion thereof with respect to the movement direction of the belt and includes a first urging portion and a second urging portion at two different positions with respect to the movement direction of the belt. The first urging portion and the second urging portion urge the belt along a widthwise direction crossing the movement direction of the belt.

6. 发明申请

US20160370737A1 IMAGE FORMING APPARATUS 有权
标题翻译：图像形成装置
公开(公告)号：US20160370737A1
公开(公告)日：2016-12-22
申请号：US15175583
申请日：2016-06-07
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi
IPC分类号： G03G15/01
CPC分类号： G03G15/161 , G03G15/1615
摘要： An image forming apparatus includes a movable endless belt; an image forming unit, a plurality of rollers including a first roller and a second roller, and an urging member. The urging member is provided in an inner peripheral surface side at a position which is adjacent to and upstream of the first roller and which is downstream of the second roller with respect to a movement direction of the belt. The urging member is supported at an upstream end portion thereof with respect to the movement direction of the belt and includes a first urging portion and a second urging portion at two different positions with respect to the movement direction of the belt. The first urging portion and the second urging portion urge the belt along a widthwise direction crossing the movement direction of the belt.
摘要翻译：图像形成装置包括可移动环形带; 图像形成单元，包括第一辊和第二辊的多个辊以及推压构件。推动构件设置在与第一辊相邻且上游的位置处的内周面侧，并且相对于带的移动方向位于第二辊的下游。推动构件相对于带的移动方向被支撑在其上游端部，并且在相对于带的移动方向的两个不同位置处包括第一推动部和第二推动部。第一推动部分和第二推动部分沿着与带的移动方向交叉的宽度方向推动皮带。

7. 发明申请

US20220276590A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20220276590A1
公开(公告)日：2022-09-01
申请号：US17681329
申请日：2022-02-25
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi , Tetsuya Ohta , Yusuke Minato
IPC分类号： G03G15/16 , G03G15/00
摘要： An image forming apparatus includes an image bearing member, an intermediary transfer belt, a transfer member, a voltage source for applying a voltage to the transfer member, a detecting portion for detecting a current flowing through the transfer member, and a controller for carrying out constant-voltage control so that the voltage applied to the transfer member becomes a target voltage when a recording material P passes through a transfer portion. The controller is capable of changing the voltage applied to the transfer member so that a detection result detected by the detecting portion during transfer falls within a predetermined range. The controller changes the predetermined range on the basis of the detection result detected by the detecting portion when the voltage is applied to the transfer member in a state in which the recording material P is absent in the transfer portion.

8. 发明申请

US20220091552A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20220091552A1
公开(公告)日：2022-03-24
申请号：US17539764
申请日：2021-12-01
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi
IPC分类号： G03G15/00 , G03G15/16
摘要： An image forming apparatus 100, which carries out constant-voltage control of a voltage applied to a transfer member 8 and is capable of executing limiter control for controlling the voltage applied to the transfer member 8 based on a detection result of a current detecting portion 21 so that the detection result falls within a predetermined range, is capable of executing a first mode in which a toner image is transferred onto a recording material P and a second mode in which a plurality of test toner images are transferred onto the recording material P by applying a plurality of different voltages to the transfer member 8, and a controller 50 is capable of carrying out the limiter control while the recording material P passes through the transfer portion 8 in executing the first mode and does not carry out the limiter control while an area onto which the plurality of test images are transferred passes through a transfer portion N2 in executing the second mode.

9. 发明申请

US20210397112A1 IMAGE FORMING APPARATUS 有权
公开(公告)号：US20210397112A1
公开(公告)日：2021-12-23
申请号：US17347900
申请日：2021-06-15
申请人： CANON KABUSHIKI KAISHA
发明人： Ryosuke Tsuruga , Yutaka Kakehi , Tatsuya Kohno , Manato Kobayashi
IPC分类号： G03G15/16
摘要： An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.

10. 发明授权

US09348266B2 Image forming apparatus using press member to prevent deflection of belt 有权
标题翻译：图像形成装置，使用按压部件，防止带的挠曲
公开(公告)号：US09348266B2
公开(公告)日：2016-05-24
申请号：US14693287
申请日：2015-04-22
申请人： CANON KABUSHIKI KAISHA
发明人： Yutaka Kakehi
IPC分类号： G03G15/16 , G03G15/00
CPC分类号： G03G15/1605 , G03G15/6567 , G03G2215/0129
摘要： An outer roller is provided at a position offset upstream, in a rotation direction of an image carrying belt, of an inner roller. The inner and outer rollers are provided across the image carrying belt and form a transfer nip portion nipping and conveying a recording medium. A press member presses the image carrying belt from an inner circumferential side at upstream of the inner roller. The press member is provided such that a length along a belt surface of the image carrying belt between a downstream end of a part thereof in contact with the image carrying belt and an upstream end of the transfer nip portion is shorter than a length of an end margin formed on an upstream end area of the recording medium.
摘要翻译：外辊设置在内辊的图像承载带的旋转方向上游偏离的位置处。内辊和外辊设置在图像承载带的两侧，并形成夹持和传送记录介质的转印辊隙部分。按压部件从内侧辊的上游侧的内周侧按压图像传送带。按压构件被设置成使得沿着与图像承载带接触的部分的下游端与转印夹持部的上游端之间的图像传送带的带表面的长度短于端部的长度形成在记录介质的上游端区的边缘。

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