Canon Kabushiki Kaisha

Takeo Tsunemi

Koichi Sato

Kenichiro Waki

Yasushi Miura

Kazuo Kishino

Tatsuo Takeuchi

Hideo Kawamoto

Masahiro Inoue

Jiro Ishizuka

Takeshi Menjo

Koji Amemiya

Masahiro Itoh

Yasuo Nami

Akio Ohno

Tsuyoshi Kunishi

Yoshinobu Shimomura

Mitsuka Abe

Toru Obuchi

Hiroyuki Katsuki

Masahiro Imanishi

This invention relates to a image forming apparatus comprising an image carrier, charging means, image exposing measuring means, surface correction toner image forming means for forming a toner image extending in parallel to a direction of a rotation axis of the image carrier at a non-image area on the surface of the image carrier and a controller for changing a formation condition of the surface correction toner image formed parallel to the direction of the rotation axis of the image carrier at the non-image area on the surface of the image carrier by the surface correction toner image forming means, according to the surface roughness or the physical property value reflecting the surface roughness of the image carrier measured by the measuring means.

Image forming apparatus having an improved photosensitive drum cleaning

An image forming apparatus has an image bearing member, a charging member which contacts with the image bearing member to charge it, detecting device for detecting an electric current flowing through the charging member when a predetermined voltage is applied thereto, and a display device for displaying an information about a life of the image bearing member in conformity with the result of detection by the detecting device. The display device can display at least two different kinds of information corresponding to at least two different electric currents detected by the detecting device.

Image forming apparatus

An image forming apparatus, such as a copying machine, has a fixing device for fixing a developer image transferred to a transfer medium, such as paper, with a fixing roller whose surface is coated with a release agent, such as oil, and includes at least one feed passage member for conveying, while contacting, a transfer medium to a transfer region of the apparatus. The feed passage member has a release agent absorbing layer on the surface thereof, and is thus advantageous for preventing release agent from being transferred and adhered to a photo-sensitive drum of the apparatus. The release agent absorbing layer of the feed passage member may contain either porous particles or particles and a binder resin, and be formed on another layer for retaining release agent absorbed by the release agent absorbing layer. The feed passage member preferably constitutes a transfer medium carrying member, which may include a dielectric sheet, for supporting and carrying a transfer medium. The member may alternatively constitute a pick-up roller, a feed guide, and/or a resist roller of the apparatus.

Method for forming an image by absorbing a release agent using a release

An image forming apparatus includes a movable image bearing member; an image transfer member cooperative with the image bearing member to form a nip where an image is transferred from the image bearing member onto a transfer material, wherein the transfer member is constant-voltage-controlled during image transfer operation; wherein a voltage applied to the transfer member during constant voltage control is determined in accordance with a dimension of the transfer material measured in a direction perpendicular to a movement direction of the image bearing member.

Image forming apparatus with controlled transfer voltage

A recycled paper for electrophotography has a fine class pulp containing a fine class waste paper pulp. The fine class pulp is in a content of not less than 90% by weight based on the weight of the whole pulp. The recycled paper has a waste paper pulp content of more than 70% by weight based on the weight of the whole pulp.

Recycled paper for electrophotography and image forming method making

The present invention provides an image forming apparatus including an image bearing member; image forming devices for forming a toner image on the image bearing member, the average volume particle diameter of the toner being 3-10 .mu.m; a movable transfer sheet bearing member for bearing a transfer sheet; and a transfer member for transferring the toner image formed on the image bearing member onto the transfer sheet carried by the transfer sheet bearing member at a transfer station. The transfer member includes a fiber brush engageable by the transfer sheet bearing means at a side opposite to the image bearing member at the transfer station.

Image forming device having an electrically dielectric regulating member

An image forming apparatus having a photosensitive drum and a transfer drum including a transfer member carrying sheet substantially contacting the photosensitive drum. In order to enable a toner image formed on the photosensitive drum to be efficiently transferred to a transfer member, the apparatus has a pressing sheet for outwardly pressing the transfer member carrying sheet from the interior of the transfer drum and a conductive member provided on the side of the pressing sheet adjacent the transfer member carrying sheet. The conductive member serves to realize a uniform distribution of surface potential on the pressing sheet and to maintain the surface potential constant, so that the intensity of the electric field applied to the corona discharge is made constant at a low level so that a stable transfer corona is applied to the transfer member carrying sheet, thus ensuring good quality of the transferred image.

Image forming apparatus utilizing intermediate transfer member

The present invention provides an image forming apparatus having a shiftable image bearing member; an image forming device for forming an image on the image bearing member; and a transfer device for transferring the image formed on the image bearing member onto a transfer sheet at a transfer station, the transfer device urging the transfer sheet against the image bearing member and having a transfer electrode to which a voltage is applied; and wherein a resistance value between a surface of the transfer electrode facing the image bearing member and a portion of the transfer electrode at which the voltage is applied is greater at an upstream side of a shifting direction of the image bearing member than at a downstream side thereof, on the surface of the transfer electrode, whereby an image can be obtained without any transfer void.

Growing community of inventors

Yokohama, Japan

Takeo Tsunemi