Canon Kabushiki Kaisha

Akimichi Suzuki

Satoshi Nishida

Takanori Mitani

Isamu Takeda

Kazuhiro Doda

Hideo Nanataki

Shogo Kan

Masahiro Suzuki

Akira Okano

Yusuke Shimizu

Kenichi Iida

Hisayuki Tomura

Kensuke Umeda

Motoki Adachi

Atsushi Nakamoto

Yuki Nishizawa

Takaaki Akamatsu

Tetsuya Sano

Yuichiro Hirata

Naoki Fukushima

Kenji Takagi

Yasuhito Minamishima

Takao Nada

Keisuke Samejima

Hiroshi Yadoiwa

Kenji Watanabe

Shinsuke Kobayashi

Akira Yoshimura

Kazuhiro Funatani

Takao Kume

Tomoya Tateishi

Hiroaki Sakai

Kohei Okayasu

Shuji Saito

Terutaka Endo

Takashi Nomura

Atsushi Murakami

Ryo Morihara

Keisuke Mitsuhashi

Tomoya Kuruma

Shinya Kawakami

A fixing apparatus includes first and second rotating members, a heater having a heating element and a substrate, and first and second contact members. A direction of a longer side on a surface of the substrate where the heating element is disposed is a longitudinal direction. A direction intersecting the longitudinal direction is a widthwise direction. The first contact member is disposed in a region outside a region where a maximum size recording material conveyed to a nip portion passes through the nip portion on one end side in the longitudinal direction on an outer circumferential surface of the first rotating member, and the second contact member is disposed in the region outside the region where the maximum size recording material conveyed to the nip portion passes through the nip portion on an other end side in the longitudinal direction on an outer circumferential surface of the second rotating member.

Fixing apparatus and image forming apparatus

An image forming apparatus includes pair of ejection rollers that are used for ejecting a recording material to a stacking unit from a main body of the image forming apparatus and a cooling unit. The cooling unit includes, air-blowing ports that are used for blowing air onto the recording material in a direction crossing a transport direction of the recording material are positioned in a region that is located above the position of a nip portion of the pair of ejection rollers and below an extension line tangent to the nip portion of the pair of ejection rollers.

Image forming apparatus

A fixing apparatus for fixing an image onto recording material, includes a heating rotary member, film of a cylindrical shape, and pressure member configured to press the film from inside the film toward the heating rotary member to form a nip portion as an area where the heating rotary member and film contact. The pressure member includes a metallic member extending from an upstream side of a center in a recording material conveyance direction of the nip portion to a downstream side, wherein the recording material on which the image is formed is conveyed while being heated at the nip portion to fix the image onto the recording material. A center of gravity of the metallic member is on the upstream side of the center in the recording material conveyance direction of the nip portion in a cross-section perpendicular to a rotation axis direction of the heating rotary member.

Fixing apparatus and image forming apparatus having the same

An image forming apparatus includes an image forming portion to form a toner image on a recording material on the basis of image information, a fixing portion to fix the toner image on the recording material, fixing portion including a heating member and an opposing member to form a nip, a temperature detecting member to detect a temperature of the heating member, a controller to control electrical power supplied to the heating member so that the temperature detected by the temperature detecting member is a target temperature, and an acquiring portion to acquire density information of the toner image from the image information. The controller sets the target temperature depending on the density information.

Image forming apparatus having a controller that sets a target temperature based on density information

A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.

Film and image heating device using film

Provided is a fixing apparatus for fixing a toner image on a recording material while conveying the recording material on which the toner image has been formed at a nip portion that includes a roller, a heating unit configured to heat the roller from outside the roller, the heating unit receiving power supplied from a power supply, a backup unit forming the nip portion with the roller, and a power shutdown member configured to operate in response to an abnormal temperature of the backup unit and shut down power supply to the heating unit.

Fixing apparatus for fixing a toner image on a recording material at a nip portion

An image forming apparatus includes a fixing unit including a roller, a heating rotary member heating the roller, and a backup member forming a nip portion, a temperature detection unit detecting a temperature of the heating rotary member, and a control unit for controlling power so that the detected temperature is maintained at a target temperature, wherein a print job includes a first step in which the unfixed toner image is formed on the recording material, a second step in which fixing processing is executed, and a third step in which the fixing unit is cleaned, and wherein the third step is executed following the second step, and in the third step, while the target temperature is set higher than the target temperature in the second step, the roller and the heating rotary member are rotated in a state where no recording material is present at the nip portion.

Image forming apparatus which controls the transfer of toner to a heating member

A fixing apparatus includes a roller, a heating rotation member configured to form a pressure portion by coming into contact with the roller, the heating rotation member being rotated by rotation of the roller, and a pressing rotation member configured to form a nip portion by coming into contact with the roller, the pressing rotation member being rotated by the rotation of the roller, wherein micro-hardness of a surface of the heating rotation member at the pressure portion and micro-hardness of a surface of the pressing rotation member at the nip portion are both higher than micro-hardness of a surface of the roller, and wherein frictional force acting on the roller at the pressure portion is larger than frictional force acting on the roller at the nip portion.

Fixing apparatus for fixing a toner image on a recording medium while conveying and heating the recording medium

An image forming apparatus for forming a toner image on a recording material, the apparatus includes a cylindrical film; a plate-like nip forming member contacted with an inner surface of the film, the nip forming member including a base member and a coating layer on the base member, the coating layer having a thermal expansion coefficient smaller than that of the base member; and a roller cooperative with the nip forming member to form a nip, wherein the coating layer is provided on a first surface of the nip forming member which is opposed to the film and on a second surface opposite from the first surface except for an outer edge portion of the nip forming member.

Heating device and image forming apparatus

Fixing apparatus

A fiber member and a transfer belt are movable into contact with or away from each other. In an initial contact state in which an image carrying member and the transfer belt are separated and the transfer belt and the fiber member start touching, an upstream side of the fiber member in the movement direction of the transfer belt touches the transfer belt before a downstream side of the fiber member touches the belt. In a contact state in which the image carrying member and the transfer belt are in contact and the transfer belt and the transfer device are in contact, a holding surface is inclined with respect to an opposing portion of an inner peripheral surface of the transfer belt in such a manner that a distance between the holding surface and the opposing portion increases from the downstream side to the upstream side in the movement direction.

An image forming apparatus includes an exposure device configured to expose image bearing members charged by charging devices to form latent images on the image bearing members, and a control unit configured to, in ether one or both of an image forming unit A and an image forming unit B, adjust an amount of exposure by which the image bearing member is exposed and a charging voltage based on information about the image bearing members of the image forming units A and B. The control unit is configured to make the charging voltage and the amount of exposure in the image forming unit A different from the charging voltage and the amount of exposure in the image forming unit B.

An image forming apparatus includes an image forming portion; and a fixing portion. The fixing portion includes a cylindrical film, a nip-forming member and a roller including a shaft portion and an elastic layer. The elastic layer contacts an outer surface of the film except an end region of the film with respect to a generatrix direction. In the end region, the shaft portion and the outer surface of the film oppose each other with a spatial region with respect to a radial direction of the shaft portion. The image forming apparatus includes a spacer occupying at least a part of the spatial region.

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Yokohama, Japan

Akimichi Suzuki