公开(公告)号：US12117751B2

公开(公告)日：2024-10-15

申请号：US18170787

申请日：2023-02-17

Applicant: CANON KABUSHIKI KAISHA

Inventor： Keisuke Yoshida ,  Youichi Chikugo ,  Kenichi Tanaka ,  Hidekazu Tatezawa ,  Rikiya Takemasa ,  Takeshi Kozuma ,  Mikihiko Watanabe ,  Taku Ashida ,  Shutaro Saito ,  Yuya Yamada

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064 ,  G03G2215/2038

Abstract: A fixing apparatus includes a belt, a rotary member, a pad member, and a slide member. A distance in the conveyance direction between a first position and a second position is 3.0 mm or less. The first position is a downstream edge of a tip of a projection positioned most downstream in a direction of rotation of the belt. The second position is an upstream edge, in the direction of rotation of the belt, of the guide portion that contacts with the inner circumference surface of the belt. A distance in the pressing direction between a third position and a fourth position is 0.4 mm or more and 2.0 mm or less. The third position is the tip of the projection positioned most downstream in the direction of rotation of the belt. The fourth position is the same position as the second position.

公开(公告)号：US11815834B2

公开(公告)日：2023-11-14

申请号：US17700673

申请日：2022-03-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Rikiya Takemasa

IPC: G03G15/20 ,  G03G21/00

CPC classification number: G03G15/2025 ,  G03G21/0041

Abstract: An image forming apparatus includes an image forming unit, first and second rotary members, a cleaning mechanism, and a separating mechanism. The first and second rotary members cooperatively form a nip portion configured to nip and convey the recording material while heating and fixing the tonner image onto the recording material. The cleaning mechanism includes a collecting roller. The cleaning mechanism is configured to clean the first rotary member by bringing the cleaning web into contact with the collecting roller that is in contact with the first rotary member and rotates together with the first rotary member. The separating mechanism is configured to separate the cleaning web from the collecting roller when the collecting roller is separated from the first rotary member.

公开(公告)号：US20230136810A1

公开(公告)日：2023-05-04

申请号：US18147047

申请日：2022-12-28

Applicant: Canon Kabushiki Kaisha

Inventor： Youichi Chikugo ,  Rikiya Takemasa ,  Hidekazu Tatezawa ,  Takeshi Kozuma ,  Yutaro Tsuno

IPC: G03G15/20

Abstract: An image heating apparatus includes a first rotary member, a second rotary member, a frame member, a guide portion, and a cover. The first rotary member is configured to heat a toner image formed on a recording material. The second rotary member is configured to contact the first rotary member and form a fixing nip portion with the first rotary member. The frame member is configured to support the first rotary member and the second rotary member. The guide portion is configured to guide the first rotary member to be moved upstream in a conveyance direction of the recording material when the first rotary member is being removed. The cover is attached to the frame member and configured to turn around a rotation shaft to open and close the guide portion. The cover is configured to turn in a direction toward the conveyance direction to open the guide portion.

公开(公告)号：US11454908B2

公开(公告)日：2022-09-27

申请号：US17323356

申请日：2021-05-18

Applicant: Canon Kabushiki Kaisha

Inventor： Takeshi Kozuma ,  Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Rikiya Takemasa

IPC: G03G15/20

Abstract: An image heating apparatus includes a heating roller, and, a heater unit. The heater unit is provided on an inner side of the heating roller. The heater unit includes a first halogen heater, a second halogen heater, and, a pair of holders. The pair of holders holds the first halogen heater and the second halogen heater such that the pair of holders, the first halogen heater and the second halogen heater are integrally inserted to and extracted from the heating roller.

公开(公告)号：US11269272B2

公开(公告)日：2022-03-08

申请号：US17094077

申请日：2020-11-10

Applicant: Canon Kabushiki Kaisha

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

IPC: G03G15/20

Abstract: A fixing device includes a rotatable fixing belt, a pad, a rotatable pressing member, a pressing member driving source, an auxiliary driving roller, and a transmission mechanism for transmitting a driving force from the pressing member driving source to the auxiliary driving roller, wherein a peripheral speed of the auxiliary driving roller is faster than a peripheral speed of the pressing member, and a steering roller provided so as to stretch the fixing belt at the inner surface of the fixing belt in a position downstream of the auxiliary driving roller and upstream the pad with respect to a rotational direction of the fixing belt. The steering roller adjusts a position of the fixing belt with respect to a widthwise direction of the fixing belt by inclining the fixing belt so as to be positioned within a predetermined range.

公开(公告)号：US12111594B2

公开(公告)日：2024-10-08

申请号：US18063369

申请日：2022-12-08

Applicant: CANON KABUSHIKI KAISHA

Inventor： Taku Ashida ,  Youichi Chikugo ,  Hidekazu Tatezawa ,  Kenichi Tanaka ,  Rikiya Takemasa ,  Takeshi Kozuma ,  Mikihiko Watanabe

IPC: G03G15/20

CPC classification number: G03G15/2064

Abstract: A fixing device includes a heating unit, a pressure unit, a first frame, an urging member, a support member, and a fixing member. The heating unit heats toner carried by a recording medium. The pressure unit pressurizes the heating unit to form a nip portion with the heating unit and fixes a toner image onto the recording medium at the nip portion with the heating unit. The first frame moves to a first position where the heating unit is exposed and moves to a second position where the heating unit is covered. The urging member urges the heating unit to position the heating unit. The support member supports one end of the urging member and the fixing member fixes the support member to the fixing device.

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：US20220214635A1

公开(公告)日：2022-07-07

申请号：US17700673

申请日：2022-03-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Rikiya Takemasa

IPC: G03G15/20 ,  G03G21/00

Abstract: An image forming apparatus includes an image forming unit, first and second rotary members, a cleaning mechanism, and a separating mechanism. The first and second rotary members cooperatively form a nip portion configured to nip and convey the recording material while heating and fixing the tonner image onto the recording material. The cleaning mechanism includes a collecting roller. The cleaning mechanism is configured to clean the first rotary member by bringing the cleaning web into contact with the collecting roller that is in contact with the first rotary member and rotates together with the first rotary member. The separating mechanism is configured to separate the cleaning web from the collecting roller when the collecting roller is separated from the first rotary member.

公开(公告)号：US11307520B2

公开(公告)日：2022-04-19

申请号：US17146612

申请日：2021-01-12

Applicant: CANON KABUSHIKI KAISHA

Inventor： Youichi Chikugo ,  Hidekazu Tatezawa ,  Yutaro Tsuno ,  Kenichi Tanaka ,  Rikiya Takemasa

IPC: G03G15/20 ,  G03G21/00

Abstract: An image forming apparatus includes an image forming unit, first and second rotary members, a cleaning mechanism, and a separating mechanism. The first and second rotary members cooperatively form a nip portion configured to nip and convey a recording material while heating and fixing a toner image onto the recording material. The cleaning mechanism includes a collecting roller. The cleaning mechanism is configured to clean the first rotary member by bringing a cleaning web into contact with the collecting roller that is in contact with the first rotary member and rotates together with the first rotary member. The separating mechanism is configured to separate the cleaning web from the collecting roller when the collecting roller is separated from the first rotary member.

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.