公开(公告)号：US20230273551A1

公开(公告)日：2023-08-31

申请号：US18173398

申请日：2023-02-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Koji NIHONYANAGI

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2064

Abstract: An image forming system comprising: an apparatus main body equipped with an image forming portion, and a control portion that controls a fixing operation of fixing the image on the recording material, wherein a first fixing unit having a first heater and a first number of first temperature detection elements that detect the temperature of the first heater and a second fixing unit having a second heater and a second number of second temperature detection elements that detect the temperature of the second heater, can be selectively mounted on the apparatus main body, and the control portion controls the fixing operation on the basis of first temperature information detected by the first temperature detection elements when the first fixing unit is mounted, and controls the fixing operation on the basis of second temperature information detected by the second temperature detection elements when the second fixing unit is mounted.

公开(公告)号：US20230259057A1

公开(公告)日：2023-08-17

申请号：US18306322

申请日：2023-04-25

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kazuhiro Doda ,  Tsuguhiro Yoshida ,  Kohei Wakatsu

IPC: G03G15/20

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

Abstract: A fixing apparatus including: a first rotary member; a second rotary member; a nip forming member; and a heater. The nip forming member includes: a first projection portion inside a nip area; and a second projection portion located outside the nip area. The first and second projection portion abut against the inner circumferential surface of the first rotary member. In a direction orthogonal to a nip tangent, a distance between a tip of the second projection portion and the nip tangent is larger than a distance between a tip of the first projection portion and the nip tangent. The second projection portion extends toward the second rotary member without exceeding the nip tangent. A radius of curvature at a tip portion of the second projection portion is smaller than a radius of an inner circumferential circle of the first rotary member.

公开(公告)号：US20230244167A1

公开(公告)日：2023-08-03

申请号：US17965211

申请日：2022-10-13

Applicant: Seiji SAITOH

Inventor： Seiji SAITOH

IPC: G03G15/20

CPC classification number: G03G15/2064

Abstract: A pressing device includes a pressure lever that is platy and has a thickness t. The pressure lever pivots. A cam presses the pressure lever. A cam follower is mounted on the pressure lever and disposed opposite the cam. The cam follower transmits pressure from the cam to the pressure lever. The cam follower has a contact face that contacts the cam and a side face that is perpendicular to the contact face. The contact face has a length W in a thickness direction of the pressure lever and a length L1 in an orthogonal direction perpendicular to the thickness direction of the pressure lever. The length L1 is defined from a contact position where the cam follower contacts the cam to the side face of the cam follower. The thickness t, the length W, and the length L1 satisfy a relation defined by L1≥0.6×(W−t)/2+0.2.

公开(公告)号：US11709447B2

公开(公告)日：2023-07-25

申请号：US17868540

申请日：2022-07-19

Applicant: TOSHIBA TEC KABUSHIKI KAISHA

Inventor： Kazuhiko Kikuchi

IPC: G03G15/20

CPC classification number: G03G15/205 ,  G03G15/2053 ,  G03G15/2064

Abstract: According to an embodiment, a heater unit includes a substrate. A first heating element is on a first side of the substrate. A second heating element is on a second side of the substrate. A first wiring is on the first side of the substrate and connected to the first heating element. A first electrode is on the first side of the substrate and connected to the first heating element. A second wiring is on the second side of the substrate and connected to the second heating element. A second electrode is on the second side of the substrate and connected to the second heating element via the second wiring. A portion of the second heating element overlaps a first portion of the first heating element.

公开(公告)号：US11709444B2

公开(公告)日：2023-07-25

申请号：US17568000

申请日：2022-01-04

Applicant: Canon Kabushiki Kaisha

Inventor： Eiji Uekawa

IPC: G03G15/20

CPC classification number: G03G15/2039 ,  G03G15/2064

Abstract: An image heating apparatus includes a heater having a first heating block and a second heating block, a heating rotating member to be heated by the heater, a pressure rotating member forming a nip portion for conveying a recording material between the pressure rotating member and the heating rotating member, first temperature detection elements and second temperature detection elements for detecting temperatures of the first heating block and second heating block respectively at positions farther from a recording material conveyance reference position than the first temperature detection elements. In the image heating apparatus, the first temperature detection elements are arranged on a side downstream of the heater in a recording material conveying direction, and the second temperature detection elements are arranged on upstream of the first temperature detection elements in the recording material conveying direction.

公开(公告)号：US11703783B2

公开(公告)日：2023-07-18

申请号：US17842794

申请日：2022-06-17

Applicant: Ryohhei Sugiyama

Inventor： Ryohhei Sugiyama

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064 ,  G03G2215/2032

Abstract: A fixing device includes a fixing belt that is endless and rotatable. A nip formation pad is disposed opposite an inner circumferential face of the fixing belt via a lubricant. A pressure roller sandwiches the fixing belt together with the nip formation pad to form a pressing region through which a recording medium is conveyed. A cap is disposed opposite a lateral end of the fixing belt in an axial direction of the fixing belt. A seal is tubular and contacts an outer circumferential face of the fixing belt in at least a part of an inner circumferential face of the seal. The seal seals a gap between the cap and the fixing belt. The seal includes a non-perpendicular portion that is not perpendicular to a circumferential direction of the fixing belt and defines a slit.

公开(公告)号：US11693361B2

公开(公告)日：2023-07-04

申请号：US17842533

申请日：2022-06-16

Applicant: CANON KABUSHIKI KAISHA

Inventor： Masashi Tanaka ,  Shingo Ito

IPC: G03G15/20 ,  G03G21/20

CPC classification number: G03G21/206 ,  G03G15/205 ,  G03G15/2028 ,  G03G15/2064

Abstract: An image forming apparatus for forming a toner image on a recording material includes a fixing unit and a blower unit to blow air around a roller. The fixing unit includes a tubular shape film, a heating member disposed in a space surrounded by the film, and the roller forming a nip portion with the heating member. The fixing unit heats and fixes the toner image onto the recording material at the nip portion. For printing that forms toner images on continuously conveyed recording materials where a roller surface temperature is lower than a predetermined temperature, fan stop and operation periods are set. During the fan stop period, the blower unit is stopped and an interval between preceding and subsequent recording materials is widened. During the fan operation period, the blower unit is in operation and the interval is narrower than the interval during the fan stop period.

公开(公告)号：US11693344B2

公开(公告)日：2023-07-04

申请号：US17544860

申请日：2021-12-07

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takeshi Kinoshita ,  Junji Ishikawa

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2039 ,  G03G15/2064 ,  G03G2215/2035

Abstract: A heating efficiency 600 includes a substrate 610 and a plurality of heat generating elements 523a to 623f which are provided on both surfaces of the substrate 610 and which generate heat, and heats a fixing belt in contact with an inner peripheral surface of the fixing belt. The plurality of heat generating elements 623a to 623f are different from each other in length with respect to a widthwise direction, and at least three of the heat generating elements are provided on a front surface of the substrate 610 which is a side where the heater 600 contacts the inner peripheral surface of the fixing belt 600, and at least one of the heat generating elements is provided on a back surface. A longest heat generating element 623b, in length with respect to the widthwise direction, of the plurality of heat generating elements 623a-623f is provided on the front surface. Further, as regards the heat generating elements 523a-623c provided on the front surface, with respect to a rotational direction of the fixing belt, the longest heat generating element 623b in length with respect to the widthwise direction is disposed between the heat generating element 623a and the heat generating element 623c.

公开(公告)号：US20230195014A1

公开(公告)日：2023-06-22

申请号：US17918221

申请日：2021-05-18

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Tatsunori IZAWA ,  Takayuki HORIE ,  Yasuo SUZUKI ,  Satoru FURUYA ,  Satoshi OHWADA ,  Hiroyuki SATO ,  Koichi UTSUNOMIYA

IPC: G03G15/20

CPC classification number: G03G15/2053 ,  G03G15/2064 ,  G03G2215/00151 ,  G03G2215/2038

Abstract: A fixing device includes a belt having a tubular shape and extending in a longitudinal direction, and having a longitudinal end, a drive roller to rotate the belt to convey a print medium between the drive roller and the belt, a bushing located at the longitudinal end of the belt, and a guide wall adjacent to the bushing. The belt is displaceable in the longitudinal direction relative to the bushing. The bushing includes a shoulder adjacent to the longitudinal end of the belt and a stem extending from the shoulder to an inside of the belt to support the belt. The guide guides the bushing to move in a direction opposite to a conveyance direction of the print medium when the belt moves toward the bushing. The stem of the bushing includes a convex portion that is in contact with an inner surface of the belt when the belt is displaced in the longitudinal direction.

公开(公告)号：US20230185222A1

公开(公告)日：2023-06-15

申请号：US18060566

申请日：2022-11-30

Applicant: Yuusuke FURUICHI ,  Hiroyuki SHIMADA ,  Yukimichi SOMEYA

Inventor： Yuusuke FURUICHI ,  Hiroyuki SHIMADA ,  Yukimichi SOMEYA

IPC: G03G15/20

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

Abstract: A nip forming device includes an endless belt that is flexible and rotates and a nip former that is disposed opposite an inner circumferential face of the endless belt. A pressure rotator presses against the nip former via the endless belt to form a nip between the endless belt and the pressure rotator, through which a conveyed object is conveyed. A separator is disposed downstream from the nip in a conveyance direction of the conveyed object. The separator separates the conveyed object from the endless belt. The separator includes a non-contact portion separated from the endless belt and a contact portion that contacts the endless belt. The contact portion retains a gap having a predetermined size between the non-contact portion and the endless belt.