Canon Kabushiki Kaisha

Akihiko Takeuchi

Toshiaki Miyashiro

Koichi Tanigawa

Takehiko Suzuki

Naoki Enomoto

Hiroto Hasegawa

Takaaki Tsuruya

Takayasu Yuminamochi

Hideo Nanataki

Hiroshi Sasame

Toshihiko Ochiai

Yasumasa Ohtsuka

Kazuaki Ono

Masahiro Suzuki

Tatsuya Kobayashi

Hideyuki Yano

Takao Kume

Tomonori Shida

Kazuhiro Funatani

Toshio Miyamoto

Tetsuo Saito

Yasushi Sato

Atsuyoshi Abe

Hiroshi Mano

Kaoru Sato

Motoi Kato

Nobuaki Kabeya

Kimio Nakahata

Motoi Katoh

Yukihiro Ohzeki

Koichi Hiroshima

Tatsunori Ishiyama

Yasumasa Otsuka

Masaki Ojima

Takashi Kawana

Masaharu Ohkubo

Akihiko Uchiyama

Kaoru Seto

Akira Ito

Yoshinori Sugiura

Atsushi Kashihara

Seiji Uchiyama

Junji Araya

Hiromichi Yamada

Katsuhiko Nishimura

Takamitsu Soda

Michio Itoh

Hiroshi Atobe

Satoru Koyama

Daisuke Murata

Hideo Nanatani

Hisashi Fukushima

Junichi Kimizuka

Michio Uchida

Toshiyuki Yoshihara

Eiichi Imai

Takahiro Inoue

Michio Ito

Tomoyuki Araki

Hiroki Kisu

Hajime Motoyama

Tatsuto Tachibana

Takayuki Miyamoto

Hidetoshi Hanamoto

Osamu Hoshino

Yoshiro Tsuchiya

Toshihiko Inuyama

Akihisa Kusano

Minoru Matsuguma

Hirotaka Ishii

Kazuhiko Okazawa

Kenji Nagata

Tamotsu Kaneko

Yoji Tomoyuki

Toshiyuki Itoh

Masatake Usui

Masanori Ishizu

Isao Matsuoka

Harumi Kugoh

Fumitaka Aoki

Hirokazu Ikenoue

Iichiro Yamamoto

Tatsuro Hayakawa

There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. The image forming apparatus includes a rechargeable battery device capable of charging and discharging. A load other than a heating element of a fusing device is designed to be capable of receiving power from the commercial power supply and/or the rechargeable battery device. At turn-on or upon returning from the energy saving mode, the supply of power from the commercial power supply and rechargeable battery device to the load is controlled. The power supplied from the commercial power supply to the fusing device is limited to a limit level corresponding to the above control result.

Image forming apparatus with control of commercial and battery power supplies to fusing device

There are provided an image forming apparatus which can implement on-demand fusing with quick rise in temperature by using the upper current (power) limit of a commercial power supply more effectively and a control method for the apparatus. This image forming apparatus includes a rechargeable battery device capable of charging and discharging, and is designed such that a load other than heating element of a fusing device can receive power from the commercial power supply and/or the rechargeable battery device. When printing is to be executed, the temperature of the fusing device is detected by a temperature detection element provided for the fusing device, and the supply of power from the commercial power supply or rechargeable battery device to the load is controlled in accordance with the detected temperature. The power supplied from the commercial power supply to the fusing device is then limited to a limit level corresponding to the control result.

Image forming apparatus and method of controlling commercial power supply to fusing means

An image forming apparatus includes a plurality of movable image carriers, a movable intermediate transfer body, and a contacting member separably contacting to the intermediate transfer body at a contacting position. A position for transfer between a first image carrier and the intermediate transfer body defines a first transfer position. A position for transfer between a second image carrier and the intermediate transfer body defines a second transfer position. A toner image formed on said intermediate transfer body is again transferred onto a transfer material after passing through said first transfer position and said second transfer position. The latent image formation on the first image carrier is done at a time different from a contacting operation of the contacting member.

Image forming apparatus

An image forming apparatus includes an image bearing member for carrying a toner image; an image forming unit for forming a toner image on the image bearing member; a transfer material carrying member, for carrying a transfer material, wherein the toner image is transferred onto a transfer material carried on the transfer material carrying member or onto the transfer material carrying member; a density detecting unit for detecting a density of the toner image transferred to the transfer material carrying member; wherein a transfer intensity is smaller when the toner image for density detection is transferred onto the transfer material carrying member than when the toner image is transferred onto the transfer material carried on the transfer material carrying member.

Image forming apparatus with a changeable transfer bias for transferring a toner patch image

The present invention relates to a transfer material conveying apparatus for conveying a transfer material to which an image is fixed, comprising, an image surface roller located on an imaging surface side of the transfer material and disposed on a downstream side in a conveyance direction of the transfer material of a heating member and a pressing member for fixing an image to the transfer material and a facing roller located in facing to the image surface roller and disposed on a downstream side in a conveyance direction of the transfer material of a heating member and a pressing member for fixing an image to the transfer material. The image surface roller has a length equal to or longer than an image area on the transfer material in a direction perpendicular to the transfer material conveyance direction, and wherein the facing roller is spaced from the image surface roller with a prescribed distance.

Transfer material conveying apparatus and image forming apparatus

An image forming apparatus includes an image carrying member and an intermediate transfer body in an endless shape movable and receivable of toner images from said image carrying member at first and second transfer positions. The following relationship is satisfied where a distance from the first transfer position to the second transfer position along the moving direction of the intermediate transfer body is denoted as Lab, a circumference of the intermediate transfer in the moving direction is denoted as Lr, and a length of the toner image formed on the intermediate transfer body is denoted as Lm&#x2212;Lr&#x2212;Lm&#x3e;Lab.

Imaging forming apparatus

A charging apparatus has a discharging member with a plurality of protrusions and an auxiliary member for assisting discharges by the discharging member, and an insulating member formed among the plurality of protrusions of the discharging member, so that discharge is made between the discharging member and the auxiliary member upon application of a voltage between the discharging member and the auxiliary member. Where an interval among distal ends of the plurality of protrusions of the discharging member is denoted as P and an interval between the discharging member and the auxiliary member is denoted as D, P is at least equal to or greater than D.

Charging apparatus with auxiliary member and image forming apparatus having the charging apparatus

An image heating apparatus for heating an image formed on a recording material includes a flexible movable member: a supporting member, having a sliding surface for sliding relative to the movable member, for supporting the movable member; a pressing member for forming a nip with the supporting member with the movable member therebetween; wherein the supporting member is provided adjacent the sliding surface with a projection which is projected toward the pressing member beyond the sliding surface, the projection being extended in a longitudinal direction of the supporting member, and wherein the supporting member is provided at a longitudinal end portion with a cut-away portion providing a projection height which is smaller than that of the projection or providing a portion substantially flush with the sliding surface.

Image heating apparatus with projection extending in longitudinal direction of supporting member

An image heating apparatus includes a rotatable member contactable to a recording material carrying an image; and a limiting member for limiting movement of the rotatable member in a direction of a generating line of the rotatable member, wherein the limiting member is provided with a surface opposed to an outer peripheral surface at an end portion of the rotatable member.

Image heating apparatus having a limiting member

An image forming apparatus has image forming means for forming an unfixed toner image on a recording material, heating and fixing means for heating and fixing the unfixed toner image on the recording material, temperature sensing means for sensing the temperature of the heating and fixing means, and power controlling means for controlling power supplied to the heating and fixing means so that the heating and fixing means keeps a fixable temperature at least on fixing operation based on an output from the temperature sensing means. The power controlling means controls power supply to the heating and fixing means based on the output from the temperature sensing element during the time from receipt of a print signal by the image forming apparatus to performing a heating and fixing process on the recording material so that, in the case where the temperature of the heating and fixing means rises fast, a temperature control operation for keeping the fixable temperature should not be protracted before heating and fixing so as to control excessive rise in the temperature of the pressure member (pressure roller) and prevent a media slip.

Image forming apparatus and fixing apparatus

An image forming apparatus includes an image bearing means for bearing a toner image; an intermediary transfer member, wherein the toner image is electrostatically transferred from the image bearing means onto the intermediary transfer member, and then transferred from the intermediary transfer member onto a transfer material; wherein the intermediary transfer member includes a first layer and a second layer, provided on the first layer, for receiving the toner image from the image bearing means, and wherein the second layer has a volume resistivity smaller than that of the first layer.

Image forming apparatus with intermediary transfer member

A cartridge includes at least a developing device and is detachably mountable to an image forming apparatus. The image forming apparatus includes an image controller for adjusting an image on a transferring material either by directly detecting the density of a toner image formed on an image bearing body or by transferring the toner image onto a second image bearing body and detecting a density of the transferred toner image. The cartridge includes a memory storing a correction parameter, which is used to determine how a control parameter of the image controller should be changed in accordance with the degree of wear of the process cartridge.

Process cartridge detachably mountable to an image forming apparatus and image forming apparatus including image control means for adjusting an image on a transferring material

An image forming apparatus includes a sliding member, and a pressure member which, together with the sliding member, forms a nip part, wherein a sliding surface of the nip part of the sliding member is crown shaped along a longitudinal direction of the sliding member, and the pressure roller is an inverse crown shape along the longitudinal direction. In accordance therewith, wrinkles in a recording material and springing-up of a conveying direction of the recording material can be suppressed.

Image heating apparatus

Induction heating type image heating apparatus

An object of the present invention is to provide an image heating apparatus that has heating device for heating an image formed on a recording material, the heating device including a moving member moving as coming into contact with the recording material, a temperature detecting element for detecting a temperature of the heating device, and power supply control device for controlling an electrical power to the heating device so that the temperature detected by the temperature detecting element is maintained at a set temperature, wherein the power supply control device sets the electrical power in accordance with the temperature detected by the temperature detecting element and a moving speed of the moving member.

Image heating apparatus that changes heat control amounts at different moving speeds

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Susono, Japan

Akihiko Takeuchi