Canon Kabushiki Kaisha

Ryosuke Tsuruga

Yutaka Kakehi

Manato Kobayashi

Tatsuya Kohno

Kaoru Okamoto

Kazuhisa Shirayama

Koji Sato

Akeshi Asaka

Yasuharu Chiyoda

Hiroto Sugimoto

Izuru Tanaka

Akira Okano

Atsushi Hori

Keisuke Mogi

Toshiyuki Yoshida

Jun Ohira

Yusuke Minato

Naoto Kameyama

Takanori Ueno

Yasutomo Tsuji

Megumi Uchino

Shingo Iwami

Hiroshi Tominaga

Ryo Aihara

Shigeo Kuroda

Midai Suzuki

Kiyonori Soutome

Shin Ono

In a cross-section perpendicular to a rotational axis of a first image bearing member, when a common tangential line between the first image bearing member and a second image bearing member on an intermediary transfer belt side is a rectilinear line L, a rectilinear line passing through a rotation center of the first image bearing member and a rotation center of a first transfer member is a rectilinear line P, and a rectilinear line passing through an intersection point between the rectilinear line P and the first image bearing member and perpendicular to the rectilinear line P is a rectilinear line Q, an electrode member is constituted so that the contact portion contacting an inner surface of the belt is positioned further on a first image bearing member side than the rectilinear line L is and further on a first transfer member side than the rectilinear line Q is.

Image forming apparatus

A charge eliminating apparatus configured to remove charges from a sheet on which an image is formed by a printing apparatus, includes a charge eliminating roller pair including a first charge eliminating roller and a second charge eliminating roller configured to form a nip portion together with the first charge eliminating roller, the charge eliminating roller pair being configured to remove the charges from the sheet in a state of contacting the sheet at the nip portion, a first setting unit configured to set a value of a voltage applied to the charge eliminating roller pair, and a second setting unit configured to set whether to apply the voltage to the charge eliminating roller pair, wherein the second setting unit is configured to set whether to apply the voltage to the charge eliminating roller pair without changing the value of the voltage set by the first setting unit.

Charge eliminating apparatus, image forming apparatus, and charge adjusting apparatus

An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.

An image forming apparatus includes an image forming portion, a rotatable endless belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, a guiding member, a sheet-like pressing member, and a coating member. The coating member is disposed on the pressing member so as not to contact the belt and is electrically grounded or electrically conducted to the guiding member. The coating member is formed of a material lower in surface resistivity than the pressing member.

Image forming apparatus with coated belt pressing member

An intermediary transfer belt having surface resistivity &#x3c1;s of 1&#xd7;10&#x3a9;/square or more and volume resistivity &#x3c1;v of 1&#xd7;10&#x3a9;&#xb7;cm or less includes a thermoplastic resin material containing carbon black. The carbon black contained in the thermoplastic resin material has a weight ratio of 22.5-28.5 weight % and include first carbon black and second carbon black. The first carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 50-90 weight % and dibutyl phthalate absorption of 93-127 ml/100 g, and the second carbon black of the carbon black contained in the thermoplastic resin material has a weight ratio of 10-50 weight % and dibutyl phthalate absorption of 36-79 ml/100 g.

Intermediary transfer belt, manufacturing method of the intermediary transfer belt, and image forming apparatus

An image forming apparatus includes an image forming portion, a belt, an inner roller, an outer member, an inner roller position changing mechanism, an acquiring portion, and a controller. In a case that information acquired by the acquiring portion shows that first and second recording materials are coated paper, the controller controls a position changing mechanism so that a position of the inner roller when a toner image is transferred onto the second recording material is changed to a second position. In a case that the information acquired by the acquiring portion shows that the first and second recording materials are plain paper, the controller controls the position changing mechanism so that the position of the inner roller when the toner image is transferred onto the second recording material is maintained at a first position.

An intermediary transfer belt includes a base layer; an elastic layer laminated on or above the base layer and formed with a silicone rubber as an elastic member; an intermediary layer laminated on or above the elastic layer; and a surface layer laminated on or above the intermediary layer. The elastic layer is 60 degrees or less in JIS-A hardness and is 5 degrees or more in JIS-E hardness. The intermediary layer is 0.1 g/m&#xb7;24 h or more and 600 g/m&#xb7;24 h or less in water vapor permeability coefficient and is 1 &#x3bc;m or more and 15 &#x3bc;m or less in average thickness.

Intermediary transfer belt and image forming apparatus

Growing community of inventors

Chiba, Japan

Ryosuke Tsuruga