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1. 发明授权

US12140891B2 Image forming apparatus and method for controlling same 有权
公开(公告)号：US12140891B2
公开(公告)日：2024-11-12
申请号：US18328819
申请日：2023-06-05
申请人： Canon Kabushiki Kaisha
发明人： Takashi Narahara , Ryo Morihara , Yutaka Sato
IPC分类号： G03G15/20 , G03G15/00
CPC分类号： G03G15/2039 , G03G15/5041
摘要： Disclosed is an image forming apparatus including: a fixation unit configured to heat a toner image formed corresponding to image data and fix the heated toner image onto a recording material; and a control unit configured to determine a fixation target temperature used by the fixation unit to heat the toner image on the basis of the image data, wherein the control unit performs a first determination to calculate a first target temperature on the basis of image density information in each of a plurality of regions in which the image data is divided in a main-scanning direction and a sub-scanning direction and a second determination to determine whether the image data is a text image, and determines the fixation target temperature on the basis of results of the first determination and the second determination.

2. 发明授权

US12130570B2 Fixing device and image forming apparatus 有权
公开(公告)号：US12130570B2
公开(公告)日：2024-10-29
申请号：US18174465
申请日：2023-02-24
申请人： Toshiba Tec Kabushiki Kaisha
发明人： Hiroshi Ota
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： A fixing device includes a fixing unit, a temperature sensor, and a controller. The fixing unit includes a fixing member with which a medium on which a developer image is transferred comes into contact and a heat source that supplies heat to the fixing member. The temperature sensor measures temperature of a surface with which the medium comes into contact in the fixing member. The controller outputs information indicating an abnormality of temperature detection by the temperature sensor if an estimation value of temperature of the fixing member is larger than a predetermined reference value.

3. 发明公开

US20240337977A1 IMAGE FORMING APPARATUS THAT CONTROLS SHEET INTERVAL 审中-公开
公开(公告)号：US20240337977A1
公开(公告)日：2024-10-10
申请号：US18628530
申请日：2024-04-05
申请人： CANON KABUSHIKI KAISHA
发明人： HIROMITSU TAKANO , TAKANORI MITANI , SATORU NAGASHIMA , TAKESHI SHIMBA
IPC分类号： G03G15/00 , B65H7/06 , G03G15/20
CPC分类号： G03G15/657 , B65H7/06 , G03G15/2039 , G03G15/5029 , G03G15/5066 , G03G15/70 , B65H2301/13
摘要： An image forming apparatus includes a conveyance member to convey a sheet, an image forming unit, a fixing device, a component, and a controller. The image forming unit forms a toner image on the conveyed sheet conveyed. The fixing device fixes an unfixed toner image formed on the sheet, onto the sheet. Heat of the fixing device propagates to the component. The controller controls a passing sheet interval between a plurality of sheets passing through the fixing device. The controller executes throughput control for controlling a sheet interval, which is an interval between a preceding sheet and a subsequent sheet passing through the fixing device, such that a temperature of a non-passage region through which sheets do not pass in the fixing device is suppressed to a predetermined first limit temperature or less and a temperature of the component is suppressed to a predetermined second limit temperature or less.

4. 发明授权

US12105450B2 Heating device and heating-object utilization apparatus 有权
公开(公告)号：US12105450B2
公开(公告)日：2024-10-01
申请号：US18160863
申请日：2023-01-27
申请人： FUJIFILM Business Innovation Corp.
发明人： Toshiyuki Miyata , Toru Inoue , Kazuyoshi Itoh , Kiyoshi Koyanagi , Keitaro Mori , Sou Morizaki , Motoharu Nakao , Toko Hara
IPC分类号： G03G15/20
CPC分类号： G03G15/2039 , G03G15/2053
摘要： A heating device includes: a heater including plural heating portions that generate different amounts of heat in a width direction that crosses a transport direction in which a heating object is transported; and plural temperature equalization members that are disposed on the heater and extend in the width direction with an interval provided therebetween in the transport direction, the plural temperature equalization members equalizing a temperature of the heater in the width direction. One of the plural temperature equalization members has a length greater than or equal to a width of a maximum passing region of the heater through which the heating object passes when the heating object has a maximum width. A remaining one of the plural temperature equalization members has a length less than the length of the one of the plural temperature equalization members.

5. 发明授权

US12078946B2 Image forming apparatus 有权
公开(公告)号：US12078946B2
公开(公告)日：2024-09-03
申请号：US18297524
申请日：2023-04-07
申请人： TOSHIBA TEC KABUSHIKI KAISHA
发明人： Sasuke Endo
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： An image forming apparatus includes a plurality of sheet storage receptacles configured to store a sheet. The image forming apparatus also includes a fixing device having a heating belt and a pressure roller configured to heat and fix toner on the sheet conveyed from one of the plurality of sheet storage receptacles. The image forming apparatus also includes a processor and a memory configured to store temperature information associated with each sheet storage receptacle and related to temperature control of the fixing device, acquire type information of a sheet to be printed, in response to a predetermined condition, specify the sheet storage receptacle storing the sheet to be printed, and perform a first heating control that controls a temperature of the fixing device based on the stored temperature information associated with the specified sheet storage receptacle.

6. 发明授权

US12078945B2 Temperature measuring device of fusing device and image forming apparatus 有权
公开(公告)号：US12078945B2
公开(公告)日：2024-09-03
申请号：US17890187
申请日：2022-08-17
申请人： SHARP KABUSHIKI KAISHA
发明人： Shinji Yamana
IPC分类号： G03G15/20 , G03G15/00 , G03G21/20
CPC分类号： G03G15/2039 , G03G15/2064 , G03G15/5045 , G03G21/206 , G03G2215/2032
摘要： A thermopile sensor that is a temperature measuring device of a fusing device is held on a substrate. The substrate is provided with a cylindrical member extending in front of the thermopile sensor and an aperture disposed at an end of the cylindrical member.

7. 发明授权

US12066777B2 Fixing device 有权
公开(公告)号：US12066777B2
公开(公告)日：2024-08-20
申请号：US18080475
申请日：2022-12-13
申请人： TOSHIBA TEC KABUSHIKI KAISHA
发明人： Ryota Saeki
IPC分类号： G03G15/20
CPC分类号： G03G15/2039 , G03G15/2053
摘要： According to an embodiment, a fixing device includes a cylindrical body that rotates about an axial direction and a heater that heats the cylindrical body. The heater includes a substrate with a length direction matching the axial direction. The substrate has a first portion with a width in a width direction that is greater than a width of a second portion in the width direction. A first heating element is on a central portion of the substrate overlapping with the second portion. A first temperature sensing element is at a position along the axial direction that does not overlap with the second portion.

8. 发明授权

US12038703B2 Fixing unit and image forming apparatus 有权
公开(公告)号：US12038703B2
公开(公告)日：2024-07-16
申请号：US18329648
申请日：2023-06-06
申请人： CANON KABUSHIKI KAISHA
发明人： Kohei Wakatsu , Kazuhiro Doda
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： A fixing unit includes a tubular film, a pressure roller, a heater including a first heating element and a second heating element, a detector configured to detect a temperature of the heater, a switcher configured to switch which of the first heating element and the second heating element is supplied power from a power supply, and a controller configured to control the switcher. The controller is configured to execute a first control of determining a first electric energy and a second electric energy based on the temperature of the heater detected by the detector and a target temperature of the heater, and a second control of causing the switcher to switch between a state in which power is supplied to the first heating element by the first electric energy and a state in which power is supplied to the second heating element by the second electric energy.

9. 发明授权

US12038702B2 Image heating apparatus and image forming apparatus 有权
公开(公告)号：US12038702B2
公开(公告)日：2024-07-16
申请号：US17748298
申请日：2022-05-19
申请人： CANON KABUSHIKI KAISHA
发明人： Takashi Honke
IPC分类号： G03G15/20
CPC分类号： G03G15/2039
摘要： In an image heating apparatus, a plurality of heat-generating members that a heater has include a first heat-generating member group and a second heat-generating member group, symmetrically laid out with a conveyance reference position of a recording material. A control portion supplies electric power via first and second common circuits to the first heat-generating member group and the second heat-generating member group. A temperature-detecting portion includes a first temperature-detecting element for detecting a temperature of one of the heat-generating members included in the first heat-generating member group, and a second temperature-detecting element for detecting the temperature of one of the heat-generating members included in the second heat-generating member group. The first temperature-detecting element is placed on one side as to the conveyance reference position in the width direction, and the second temperature-detecting element is placed on other side as to the conveyance reference position in the width direction.

10. 发明公开

US20240210865A1 IMAGE HEATING DEVICE AND HEATER FOR USE IN IMAGE HEATING DEVICE 审中-公开
公开(公告)号：US20240210865A1
公开(公告)日：2024-06-27
申请号：US18600067
申请日：2024-03-08
申请人： CANON KABUSHIKI KAISHA
发明人： Yasuhiro Shimura , Akira Kato , Atsushi Iwasaki
IPC分类号： G03G15/20 , H05B3/00
CPC分类号： G03G15/2053 , G03G15/2039 , G03G15/2042 , H05B3/0095 , G03G2215/2035
摘要： In an image heating device having a plurality of heating blocks which are controllable independently in a longitudinal direction of a heater, an increase of the size of the heater can be suppressed, and temperatures of a plurality of heating block can be detected. The heater has a first temperature sensor corresponding to a first heating block, a second temperature sensor corresponding to a second heating block, a first electric conductor electrically coupled to the first temperature sensor, a second electric conductor electrically coupled to the second temperature sensor, and a common electric conductor electrically coupled to the first and second temperature sensors.

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