公开(公告)号：US11714368B2

公开(公告)日：2023-08-01

申请号：US17706448

申请日：2022-03-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Mitsuru Hasegawa ,  Hiroki Kawai ,  Ayano Ogata ,  Yasuharu Toratani ,  Suguru Takeuchi ,  Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Rikiya Takemasa

IPC: G03G15/20 ,  G03G15/00

CPC classification number: G03G15/2025 ,  G03G15/2046 ,  G03G15/5029 ,  G03G2215/00742

Abstract: An image forming apparatus includes a heating rotary member, a pressure rotary member, a nip portion formed by the rotary members, a temperature adjustment control section controlling a temperature of the heating rotary member to a target temperature, a cleaning web removing toner adhering to the heating rotary member, and a controller selectively executing one of a cleaning mode and a non-cleaning mode. A first basis weight and a second basis weight greater than the first predetermined basis weight are set, in a job that mixedly uses recording media with the first and second basis weights. When the controller executes the non-cleaning mode, the temperature adjustment control section sets a target temperature of a recording medium with a basis weight less than or equal to the first basis weight to a temperature lower than a target temperature of the recording medium in the cleaning mode.

公开(公告)号：US20210191299A1

公开(公告)日：2021-06-24

申请号：US17123793

申请日：2020-12-16

Applicant: Canon Kabushiki Kaisha

Inventor： Rikiya Takemasa ,  Youichi Chikugo ,  Hidekazu Tatezawa ,  Kenichi Tanaka ,  Yutaro Tsuno ,  Mitsuru Hasegawa ,  Hiroki Kawai ,  Suguru Takeuchi ,  Ayano Ogata ,  Yasuharu Toratani

IPC: G03G15/20

Abstract: A toner image fixing device include a fixing belt; a heating roller training the belt around; a pressing pad of resin material provided inside the belt; a rotatable pressing member contacting the belt and pressing against the pad through the belt to form a nip for nipping and feeding the sheet; a supporting stay supporting the pad and including a surface contacting the pad, one of the pad and the stay being provided with a projection, and the other being provided with a recess engaged with the projection at an engaging position; and a separation plate provided without contact to the belt at a position opposed to the pad downstream of the nip in the sheet feeding direction. A distance between the engaging position and a downstream end of the pad is 0-35% of a length of the pad measured along the feeding direction.

公开(公告)号：US12222665B2

公开(公告)日：2025-02-11

申请号：US18168492

申请日：2023-02-13

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yasuharu Toratani ,  Akiyoshi Shinagawa ,  Hiroshi Miyamoto ,  Daigo Matsuura ,  Hiroki Kawai ,  Ayano Ogata ,  Asuna Fukamachi ,  Masanobu Tanaka ,  Misa Kawashima

IPC: G03G15/20

Abstract: A fixing device includes a fixing belt configured to heat a recording material, a pressure member configured to press the fixing belt, and a sliding member configured to be in sliding contact with an inner peripheral surface of the fixing belt and being opposed to the pressure member. The pressure member and the fixing belt form a fixing nip portion, and heat and pressure are applied to the recording material at the fixing nip portion to fix a toner image onto the recording material. The sliding member includes a plurality of protrusions on a surface of the sliding member that is in sliding contact with the inner peripheral surface of the fixing belt. The following expressions are satisfied: The fixing belt satisfies the prescribed formula.

公开(公告)号：US12174564B2

公开(公告)日：2024-12-24

申请号：US18461428

申请日：2023-09-05

Applicant: CANON KABUSHIKI KAISHA

Inventor： Yasuharu Toratani ,  Shutaro Saito ,  Keisuke Yoshida ,  Yuya Yamada ,  Taku Ashida ,  Asuna Fukamachi ,  Shohei Tsuzaki ,  Yusuke Yamaguchi ,  Hiroshi Miyamoto

IPC: G03G15/20

Abstract: An image forming apparatus includes a first rotatable member, a second rotatable member, an air nozzle, and a pipe. The pipe includes a portion provided in a range overlapping with the first rotatable member and making one reciprocation or more in a case that when a direction crossing a feeding direction of a recording material fed in a nip is a widthwise direction of the first rotatable member, the pipe is viewed in a direction perpendicular to the widthwise direction.

公开(公告)号：US11982961B2

公开(公告)日：2024-05-14

申请号：US18166651

申请日：2023-02-09

Applicant: CANON KABUSHIKI KAISHA

Inventor： Hiroki Kawai ,  Yasuharu Toratani ,  Hiroshi Miyamoto ,  Akiyoshi Shinagawa ,  Ayano Ogata ,  Daigo Matsuura ,  Misa Kawashima ,  Masanobu Tanaka ,  Asuna Fukamachi

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2025

Abstract: A fixing device includes an endless belt, a rotatable pressing member, a pad member inside of the belt, and a sliding member held by the pad member and sliding on an inner circumferential surface of the belt in a nip. The rotatable pressing member nips and feeds a recording material in the nip in cooperation with the belt and fixes a toner image on the recording material by applying heat and pressure. The sliding member includes a base material layer on which a plurality of projections projecting toward the rotatable pressing member are formed on a side sliding with the belt and a sliding layer provided on an outer surface of the plurality of projections. A shape of a surface of the sliding layer is a curved surface and a radius of curvature R of the curved surface satisfies 300 μm≤R≤850 μm.

公开(公告)号：US12055877B2

公开(公告)日：2024-08-06

申请号：US18184578

申请日：2023-03-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Daigo Matsuura ,  Hiroki Kawai ,  Ayano Ogata ,  Yasuharu Toratani ,  Misa Kawashima

IPC: G03G15/20

CPC classification number: G03G15/205 ,  G03G15/2064 ,  G03G2215/2045

Abstract: A fixing apparatus includes a heating rotary member and a pressing rotary member, which form a nip portion, at which a toner image is fixed to a recording material, a mixture job is a job with a mixture of recording materials including a recording material with a first grammage and a recording material with a second grammage greater than the first grammage, one of a plurality of modes is performable in the mixture job, in which a maximum value of an amount of toner on the recording material with the first grammage is greater than a maximum value of the amount of toner on the recording material with the second grammage in the first mode whereas the maximum value on the recording material with the first grammage is equal to the maximum value on the recording material with the second grammage in the second mode.

公开(公告)号：US20220308508A1

公开(公告)日：2022-09-29

申请号：US17706448

申请日：2022-03-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Mitsuru Hasegawa ,  Hiroki Kawai ,  Ayano Ogata ,  Yasuharu Toratani ,  Suguru Takeuchi ,  Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Rikiya Takemasa

IPC: G03G15/20

Abstract: An image forming apparatus includes a heating rotary member, a pressure rotary member, a nip portion formed by the rotary members, a temperature adjustment control section controlling a temperature of the heating rotary member to a target temperature, a cleaning web removing toner adhering to the heating rotary member, and a controller selectively executing one of a cleaning mode and a non-cleaning mode. A first basis weight and a second basis weight greater than the first predetermined basis weight are set, in a job that mixedly uses recording media with the first and second basis weights. When the controller executes the non-cleaning mode, the temperature adjustment control section sets a target temperature of a recording medium with a basis weight less than or equal to the first basis weight to a temperature lower than a target temperature of the recording medium in the cleaning mode.

公开(公告)号：US11300906B2

公开(公告)日：2022-04-12

申请号：US17123773

申请日：2020-12-16

Applicant: Canon Kabushiki Kaisha

Inventor： Rikiya Takemasa ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Youichi Chikugo ,  Mitsuru Hasegawa ,  Hiroki Kawai ,  Suguru Takeuchi ,  Ayano Ogata ,  Yasuharu Toratani

IPC: G03G15/20

Abstract: A fixing device for fixing a toner image on a sheet includes a rotatable fixing belt; a heating roller wherein the belt is stretched and entrained around the heating roller to heat the belt; a pressing pad of resin material provided inside of the belt; a rotatable pressing member contacting an outer peripheral surface of the belt and pressing against the pad through the belt to form a nip configured to nip and feed the sheet; a supporting metal stay supporting the pad and including a planar bottom surface faced to the pad; and projected portions integrally molded with the pad and provided along a widthwise direction of the pad, the projected portions projecting and contacting to the bottom surface such that the pad is supported by the stay. A contact area between the projected portions and the bottom surface is not less than 5% and not more than 40% of the area of the bottom surface.

公开(公告)号：US20190025736A1

公开(公告)日：2019-01-24

申请号：US16027032

申请日：2018-07-03

Applicant: CANON KABUSHIKI KAISHA

Inventor： Keita Ishiguro ,  Masanobu Tanaka ,  Suguru Takeuchi ,  Asuna Fukamachi ,  Oki Kitagawa ,  Yasuharu Toratani

IPC: G03G15/20 ,  G03G21/14 ,  G03G15/00 ,  B41J29/377

CPC classification number: G03G15/20 ,  B41J29/377 ,  G03G15/5083 ,  G03G15/6552 ,  G03G15/6573 ,  G03G21/14

Abstract: An image forming apparatus includes an image forming unit, a fixing unit, a sheet discharge unit to stack sheets, an acquisition unit, and a controller. The fixing unit fixes a toner image formed on a sheet by the image forming unit. The acquisition unit acquires information corresponding to a maximum toner application amount per unit area of the formed toner image. The controller controls the number of image formations on the sheets per unit time based on the acquired information. The controller executes a first job with a first number of image formations on the sheets per unit time during a period from an Lth sheet to an Mth sheet in the first job, and executes a second job with a second and smaller number of image formations on the sheets per unit time during the period from the Lth to the Mth sheet in the second job.

公开(公告)号：US11294313B2

公开(公告)日：2022-04-05

申请号：US17215907

申请日：2021-03-29

Applicant: CANON KABUSHIKI KAISHA

Inventor： Mitsuru Hasegawa ,  Hiroki Kawai ,  Yasuharu Toratani ,  Ayano Ogata

IPC: G03G15/20

Abstract: An image forming apparatus includes a heater, heating roller heated by the heater and a fixing belt heated by the heating roller. A thermistor detects a temperature of the fixing belt at an area where the belt is stretched by the heating roller. When a CPU receives a signal which instructs the stop of rotation of the fixing belt, the CPU continues rotation of the fixing belt until the detected temperature detected by the thermistor decreases a predetermined temperature in a case in which the detected temperature is higher than the predetermined temperature.