Ricoh Company, Ltd.

Kohtaroh Oda

Yukifumi Kobayashi

Tetsuya Ofuchi

Yasuyuki Sekino

Takayuki Nishimura

Hideyo Makino

Tatsuya Ishii

Tohru Matsumoto

Tomoaki Suga

Yuji Karikusa

Daiki Sekita

Kohsuke Yoshida

Takahiro Ogino

Hiroki Terauchi

Yuusuke Kumagawa

An image reading device includes a first scanner, a second scanner, and circuitry. The first scanner is configured to read a first side of a recording medium. The second scanner is configured to read a second side of the recording medium. The circuitry is configured to generate a first correction value to correct misalignment between the first side and the second side. The circuitry is configured to input a second correction value. The circuitry is configured to correct an image based on the first correction value and the second correction value.

Image reading device and image forming apparatus incorporating same

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

A sheet feeder, which is incorporated in an image forming apparatus, includes a sheet container, a sheet conveying member disposed facing a sheet stack that includes multiple sheet members loaded on the sheet container to separate an uppermost sheet member placed on the sheet stack from the other sheet members and to convey the uppermost sheet member, and a pressing member switchable between a pressing position to press the sheet stack from above and a retracted position to separate from the sheet stack.

Sheet feeder and image forming apparatus incorporating same

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Kanagawa, Japan

Kohtaroh Oda