Ricoh Company, Ltd.

Hiroki Terauchi

Takayuki Nishimura

Hideyo Makino

Tohru Matsumoto

Takahiro Konishi

Yukifumi Kobayashi

Yuji Karikusa

Yasuyuki Sekino

Daiki Sekita

Kohsuke Yoshida

Kohtaroh Oda

Yuusuke Kumagawa

An image forming apparatus includes an intermediate transfer unit, a secondary transfer unit, and a positioner. The intermediate transfer unit includes an intermediate transferor to bear an image. The secondary transfer unit includes a secondary transfer member to transfer the image borne by the intermediate transferor to a medium. The positioner positions the secondary transfer unit with respect to the intermediate transfer unit. The positioner includes a first member and a second member. The first member is disposed in the intermediate transfer unit. The second member is attachable to and detachable from the secondary transfer unit.

Image forming apparatus including secondary transfer device positioner for maintainability

An image reading device includes a reader, an opposing member, and circuitry. The reader is configured to read an image of an object to be conveyed. The opposing member has a plurality of opposing portions that include reference surfaces selectively switchable to be placed at a reading position of the reader. The reference surfaces include two or more identical reference surfaces. The circuitry is configured to determine whether an evaluation reading value of reading values read by the reader on each of the two or more identical reference surfaces is within a prescribed range and perform correction operation of the image reading device with the evaluation reading value within the prescribed range out of the reading values of the two or more identical reference surfaces.

Image reading device and image forming apparatus having selectively switchable reference surfaces

An image forming apparatus includes an image forming device configured to form a first image on a first side of a recording medium and a second image on a second side of the recording medium, a position detector configured to detect respective positions of the first and second images, and a controller configured to perform, based on detection results obtained by the position detector, at least one of an image position correction by matching the first and second images and a magnification error correction by calculating and correcting a magnification error of one of the first and second images relative to the other. A program product used in the image forming apparatus includes a method of forming the first image and the second image, detecting the respective positions of the first and second images, and matching a position or a size of the first and second images.

Image forming apparatus and program product used in the image forming apparatus

Growing community of inventors

Kanagawa, Japan

Hiroki Terauchi