Canon Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Asahi Glass Company, Limited

Masahiro Inoue

Tatsuo Takeuchi

Nobuhiko Takekoshi

Koji Amemiya

Takashi Hasegawa

Jiro Ishizuka

Yuji Sakemi

Yoichi Kimura

Yuji Bessho

Haruhiko Omata

Takeshi Tomizawa

Yasuo Nami

Kenji Okado

Hatsuo Tajima

Takahiro Kubo

Takeshi Menjo

Yoshikuni Ito

Motohide Shiozawa

Rie Saito

Kenichiro Waki

Yoshikuni Itou

Shinya Suzuki

Takashi Fujita

Yuichi Ikeda

Kiyoshi Sakai

Yoshiaki Kobayashi

Nobuatsu Sasanuma

Hiroyuki Suzuki

Yuichi Hashimoto

Teigo Sakakibara

Naoto Fujimura

Masami Izumizaki

Masahiro Itoh

Kazuhito Ohashi

Masaaki Sakurai

Masaru Hibino

Ryo Inoue

Takeo Yamamoto

Akio Ohno

Yoshihiro Murasawa

Hirokazu Wakabayashi

Shinya Mayama

Noriko Ohtani

Mitsuhiro Ota

Akihito Hosaka

Ikuo Kuribayashi

Takeo Tsunemi

Ryuichiro Maeyama

Tadami Kinugawa

Hiroshi Ariga

Toshiaki Takada

Hideo Ohtaki

Rie Nakashimizu

The position detecting apparatus includes a comparing part that compares the value of the digital signal output from the AD converter and a reference value that is based on a preset reference amplitude at the timings and outputs a control signal responsive to a result of the comparison. The position detecting apparatus includes an amplitude controlling part that controls amplification factors of the first amplifier and the second amplifier in such a manner that the value of the digital signal output from the AD converter comes closer to the reference value in response to the control signal output from the comparing part.

Position detecting apparatus and driving system

An image forming apparatus including, an image bearing member, an image forming device for forming a toner image on the image bearing member, a transfer device for electrostatically transferring the toner image formed by the image forming device on the image bearing member to a transfer material, an detector for detecting temperature and humidity in a main body of the apparatus and a controller for such control that the toner amount per unit area of the toner image formed on the image bearing member by the image forming device differs in accordance with a result detected by the detector.

Image forming apparatus that forms a toner image

An ink jet recording medium comprising a water-impermeable substrate, a first porous layer formed on the substrate, and a second porous layer formed on the first porous layer, wherein the psychometric lightness (L*) at a black solid printed portion with a black dye ink is at most 5.0.

Ink jet recording medium and method for its production

Image forming system for controlling the amount of toner deposited on a photosensitive drum based on environmental conditions

An image forming apparatus includes a plurality of image bearing members, a plurality of developing devices for developing latent images formed on the plurality of image bearing members with toners of plural colors, an intermediate transfer member to which toner images of plural colors are successively transferred from the plurality of image bearing members, the toner images of plural colors on the intermediate transfer member being transferred to a recording material, and a plurality of chargers for charging residual toners residual on the image bearing members after the toner images have been transferred from the image bearing members to the intermediate transfer member, the residual toners on the image bearing members charged by the chargers being electrostatically collected into the developing devices.

Image forming apparatus

The present invention relates to an image forming apparatus in which voltage is applied to an intermediate transfer body when a toner image is transferred from an image bearing body to the intermediate transfer body, and a controller controls variably a potential of a shadow portion of an electrostatic image so that a potential difference between the potential of the shadow portion and the voltage can be variable on the basis of a detected result of a detecting circuit.

System for preventing retransfer of a toner image between an intermediate transfer member and an image bearing member

An image forming apparatus includes an image bearing member for bearing an image, a recording material bearing member for bearing a recording material electrostatically, and a transfer member for transferring the image on the image bearing member electrostatically to the recording material borne by the recording material bearing member by being put into contact with the recording material bearing member, wherein a length of a contact area between the recording material bearing member and the transfer member is less than that of a contact area between the image bearing member and the recording material borne by the recording material bearing member in a conveyance direction of the recording material bearing member, wherein the recording material bearing member has a first layer for bearing the recording material and a second layer in contact with the transfer member in an image transfer, and wherein a surface resistivity of the first layer is lower than a surface resistivity of the second layer.

Image forming apparatus having contact area between recording material bearing member and transfer means that is less than contact area between image bearing member and recording material

Image forming apparatus having an injection charging system and a two component contact development device

In a multiple-color image forming apparatus a voltage which is applied to the intermediate transfer member by the voltage applying device is constant-voltage-controlled, wherein there is a period when the image bearing member which is charged by the charger and on which no toner image is formed by the image forming device and the toner image which is transferred onto the intermediate transfer member exist at the transfer position, a detecting device for detecting a current that flows in the intermediate transfer member from the voltage applying device when the voltage is applied to the intermediate transfer member by the voltage applying device during the period, and a controller for controlling at least one of the voltage which is applied to the image bearing member by the charger and a voltage which is applied to the intermediate transfer member by the voltage applying device on the basis of a detection result by the detecting device.

Image apparatus having an improved intermediate transfer system

An image forming apparatus includes an image forming device for electrostatically forming a toner image onto a transfer material, a charger for previously charging the surface of the transfer material to which the toner image is transferred to a polarity opposite to the normal charge polarity of the toner, and a control device for controlling a voltage to be applied to the charger in accordance with the kind of transfer material.

An image forming apparatus includes an image bearing member for carrying a toner image; a recording material conveyer belt for electrostatically carrying and feeding a recording material; a roller, provided on a side of the recording material conveyer belt not carrying the recording material in a separation position where the recording material is separated from the recording material conveyer belt, for supporting the recording material conveyer belt; a transfer charger for electrostatically transferring the toner image from the image bearing member onto the recording material at a transfer position; a discharge, provided across the recording material conveyer belt from the roller at the separation position, for discharging the recording material upon separation thereof from the recording material conveyer belt; wherein the roller is electrically grounded through an element in which a voltage is generated when the current is supplied thereto.

Image forming apparatus with electrically grounded roller

An image forming apparatus has an image forming device for forming an image on a recording material in response to an image on a document. The apparatus also has a glossiness detection device for detecting from the document the level of glossiness of the document image. The image forming device is controlled based on an output from the glossiness detection device. With this construction, the level of glossiness in response to the document image can be reproduced on the recording material, thus improving the quality of reproduced images.

Image forming apparatus with glossiness detection

An image forming apparatus includes an image bearing member, latent image forming device for forming an electrostatic image on the image bearing member, the latent image forming device having a charging member contactable to the image bearing member to electrically charge the image bearing member, and the charging member being supplied with a voltage which includes an oscillation component, a developing device for developing the electrostatic latent image with toner into a toner image, the developing device being capable of removing residual toner from the image bearing member, a transfer device for transferring the toner image from the image bearing member onto a transfer material, and a frequency control device for controlling a frequency of the oscillation component so that the frequency is higher when at least a part of such an area of the image bearing member as is going to be a non-image area is charged than when such an area of the image bearing member as is going to be an image area is charged.

Image forming apparatus having an improved system for removing residual

An image forming apparatus comprising an image bearing member on which a toner image is formed, transfer material carrying structure for carrying thereon on a transfer material, a transfer charger for performing an image transfer operation for transferring electrostatically the toner image formed on the image bearing member to the transfer material carried on the transfer material carrying structure at an image transfer position, wherein the transfer charger performs the image transfer operation a plurality of times on the same transfer material, the transfer charger means being supplied with a voltage of a polarity opposite from that of the toner image, and a discharger device, having a first discharger disposed adjacent to the transfer material carrying side of the transfer material carrying structure and a second discharger opposed to the first discharger with the transfer material carrying structure therebetween, wherein the first and second dischargers are not operable during a period between an image transfer onto a transfer material and a successive image transfer onto the same transfer material and during passage of the transfer material between the first and second dischargers, and wherein, during a separating operation for separating the transfer material from the transfer material carrying means, the first and second dischargers acting on the transfer material over its entire surface in the separation period.

This invention has as its object to provide an image processing apparatus and method, which can obtain high image quality by adjusting an image forming parameter or parameters in consideration of a variation in image forming condition. In order to achieve the object, the gradation characteristics of an image to be recorded are adjusted on the basis of information obtained by forming a gradation characteristic adjustment test pattern on a recording medium, and reading the formed test pattern. Subsequently, the color reproduction characteristics of an image to be recorded are adjusted on the basis of information obtained by forming a color reproduction characteristic adjustment test pattern on a recording medium, and reading the formed test pattern.

Image processing apparatus and method with gradation characteristic

Growing community of inventors

Yokohama, Japan

Masahiro Inoue