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1. 发明授权

US10241450B2 Fixing device and image forming apparatus including a potential-difference application unit 有权
公开(公告)号：US10241450B2
公开(公告)日：2019-03-26
申请号：US15697939
申请日：2017-09-07
申请人： FUJI XEROX CO., LTD.
发明人： Sou Morizaki , Yasutaka Gotoh , Jouta Kobayashi , Kazuaki Iikura , Kazuyoshi Itoh , Yasushi Nagata , Takaaki Sato
IPC分类号： G03G15/20
摘要： A fixing device includes a heating unit that rotates and that fixes a toner image on a recording medium, a pressing unit that rotates and that presses the heating unit, and a potential-difference application unit that applies a potential difference between the pressing unit and the heating unit so that a potential of the heating unit is higher than a potential of the pressing unit.

2. 发明授权

US10578998B1 Fixing device and image forming apparatus 有权
公开(公告)号：US10578998B1
公开(公告)日：2020-03-03
申请号：US16294939
申请日：2019-03-07
申请人： FUJI XEROX CO., LTD.
发明人： Kiyoshi Koyanagi , Takaaki Sato , Toru Inoue
IPC分类号： G03G15/20
摘要： A fixing device includes an endless belt that rotates in a circumferential direction and that comes into contact with a recording medium, which is transported, at an outer peripheral surface of the endless belt, a heat generating plate that includes at least one heat generating portion and extends in an axial direction of the endless belt in such a manner that a surface of the heat generating plate is in contact with an inner peripheral surface of the endless belt, the heat generating portion being formed in such a manner as to extend in the axial direction and in such a manner as to generate heat, a heat conducting unit that is in contact with a rear surface of a portion of the heat generating plate, the portion being different from a portion of the heat generating plate on which the heat generating portion is formed in a transport direction of the recording medium, and that conducts heat generated by the heat generating portion in the axial direction, an urging unit that urges the heat conducting unit toward the heat generating plate, a pressing unit that is disposed in such a manner as to oppose the heat generating plate with the endless belt interposed between the pressing unit and the heat generating plate and that forms a nip between the pressing unit and the endless belt in such a manner as to press the recording medium, which is transported, against the endless belt, and a moving unit that causes the pressing unit to move relative to the endless belt in such a manner as to set a nip width of the nip in a heating mode in which the endless belt is heated to be smaller than the nip width of the nip in a fixing mode in which an image is fixed onto the recording medium. When the heat generating portion that is included in a region of the nip in the transport direction of the recording medium and that generates heat in the heating mode has a length L1, the heat conducting unit that is included in the region of the nip in the transport direction in the heating mode has a length S1, the heat generating portion that is included in the region of the nip in the transport direction and that generates heat in the fixing mode has a length L2, and the heat conducting unit that is included in the region of the nip in the transport direction in the fixing mode has a length S2, the following formula (1) is satisfied. L2−L1

3. 发明授权

US09423738B1 Heat generating unit, fixing unit, and image forming apparatus having a thermal destruction element 有权
标题翻译：发热单元，定影单元和具有热破坏元件的成像设备
公开(公告)号：US09423738B1
公开(公告)日：2016-08-23
申请号：US14884437
申请日：2015-10-15
申请人： FUJI XEROX CO., LTD.
发明人： Kiyoshi Koyanagi , Takaaki Sato , Toru Inoue
IPC分类号： G03G15/20
CPC分类号： G03G15/2053 , G03G15/2039 , G03G15/2064 , G03G15/55 , G03G2215/2035
摘要： A heat generating unit includes a substrate; a heat-generating element that is provided on the substrate and generates heat by receiving electric power; and a thermal destruction element provided on the substrate and connected in series to the heat-generating element, the thermal destruction element having a positive temperature coefficient and causing thermal destruction due to self-heating when heated to a temperature higher than a certain temperature by the heat of the heat-generating element.
摘要翻译：发热体单元包括基板; 发热元件，其设置在所述基板上并通过接收电力而产生热量; 以及设置在基板上并且与发热元件串联连接的热破坏元件，该热破坏元件具有正温度系数，并且当被加热到高于一定温度的温度时，由于自热而引起热破坏发热元件的热量。

4. 发明授权

US10591852B1 Fixing device and image forming apparatus 有权
公开(公告)号：US10591852B1
公开(公告)日：2020-03-17
申请号：US16253223
申请日：2019-01-22
申请人： FUJI XEROX CO., LTD.
发明人： Kiyoshi Koyanagi , Takaaki Sato , Kazuyoshi Itoh , Toru Inoue
IPC分类号： G03G15/20
摘要： A fixing device includes a contact portion that comes into contact with a recording material transported; a heat source that heats the contact portion and has a counter surface and an opposite surface, the counter surface facing the contact portion; a high-thermal-conductivity portion provided on the opposite surface of the heat source and extending in a width direction intersecting a transport direction of the recording material, the high-thermal-conductivity portion having a higher thermal conductivity than the contact portion; a low-thermal-conductivity portion provided between the opposite surface of the heat source and the high-thermal-conductivity portion and having a lower thermal conductivity than the high-thermal-conductivity portion; and a temperature detector that detects a temperature of the heat source and is provided on the opposite surface of the heat source and at a position shifted from the high-thermal-conductivity portion and the low-thermal-conductivity portion in the transport direction.

5. 发明授权

US10962910B1 Heating member for fixing device and image forming apparatus 有权
公开(公告)号：US10962910B1
公开(公告)日：2021-03-30
申请号：US16781228
申请日：2020-02-04
申请人： FUJI XEROX CO., LTD.
发明人： Kiyoshi Koyanagi , Takaaki Sato , Toru Inoue
IPC分类号： G03G15/20
摘要： A fixing device includes a heat source, a support portion, at least one adhesive layer, and a heat transfer member. The support portion supports the heat source. The at least one adhesive layer fixes the heat source and the support portion to each other. The heat transfer member is disposed at a portion other than a portion between the adhesive layer and the heat source to conduct heat of a portion of the heat source to another portion of the heat source.

6. 发明授权

US10942479B1 Fixing device and image forming apparatus 有权
公开(公告)号：US10942479B1
公开(公告)日：2021-03-09
申请号：US16751469
申请日：2020-01-24
申请人： FUJI XEROX CO., LTD.
发明人： Takaaki Sato , Kiyoshi Koyanagi , Toru Inoue , Sou Morizaki
IPC分类号： G03G15/20
摘要： A fixing device includes a hollow rotating body, a sheet-shaped heater that is disposed inside the rotating body in such a manner as to extend in a width direction perpendicular to a transport direction of a recording medium, which is transported along with rotation of the rotating body, and that heats the rotating body, and multiple thermal-conductive members that are arranged in such a manner as to be in contact with a surface of the sheet-shaped heater, the surface being opposite to a contact surface of the sheet-shaped heater that is in contact with the rotating body, with a gap formed between the multiple thermal-conductive members in at least one of the width direction and the transport direction and that conduct heat of the sheet-shaped heater in the width direction, the multiple thermal-conductive members being arranged such that a first thermal-conductive member and a second thermal-conductive member that are included in the multiple thermal-conductive members and that are adjacent to each other partially overlap each other when the thermal-conductive members in a state of being arranged in a plane are viewed in the transport direction.

7. 发明授权

US10268146B2 Fixing device and image forming apparatus 有权
公开(公告)号：US10268146B2
公开(公告)日：2019-04-23
申请号：US15803843
申请日：2017-11-06
申请人： FUJI XEROX CO., LTD.
发明人： Takaaki Sato , Kiyoshi Koyanagi , Toru Inoue
IPC分类号： G03G15/20
摘要： A fixing device includes a contact member that comes into contact with a recording medium on which an image is formed, a heater that has a contact-member facing surface, which faces the contact member, and a back surface, the heater heating the contact member, a heat supply member disposed in contact with the back surface of the heater, and supplying heat of a portion of the heater having a high temperature to a portion of the heater having a low temperature, and a heat transfer portion disposed in contact with the contact member, and having a flat contact surface that comes into contact with the contact member, the heat transfer portion transferring heat of the heat supply member to the contact member.

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