Pfu Limited

Yoshiro Kawamoto

Jiyun Du

Seiichi Takeda

Masanobu Hongo

Shigeharu Okano

Masaaki Sakai

Motoharu Ichida

Satoshi Miyamoto

Hironaga Hongawa

Norihiro Yamasaku

Shigeki Uesugi

Isao Nagata

Eri Yamanishi

Tatsuo Nozaki

Yasuhiko Kishimoto

Tadasuke Yoshida

Yoshiaki Fujimoto

Yoshikazu Morita

Yoshifumi Nomura

Naoaki Shima

Shintaro Shitahira

Masakazu Sakai

Satoshi Moriguchi

There is provided an image reading device comprising: a image capturing unit that captures a manuscript; a predetermined image pattern displayed in a region that is captured by the image capturing unit and provides a background of the manuscript; and a region determination unit that determines an image region corresponding to the manuscript, based on an image element corresponding to the image pattern and another image element corresponding to a shadow of the manuscript in an image captured by the image capturing unit.

Image reading device, image processing method and computer readable medium

A solid-concentration measuring apparatus includes an ultrasonic transmitter, an ultrasonic receiver, and a response-time integrator. The ultrasonic transmitter transmits a single-pulse ultrasonic wave to a liquid toner. The ultrasonic receiver receives the single-pulse ultrasonic wave. The ultrasonic transmitter transmits again a single-pulse ultrasonic wave after a predetermined time has passed from when the ultrasonic receiver receives the single-pulse ultrasonic wave. The response-time integrator measures a response time from transmission to reception of each single-pulse ultrasonic wave, and integrates the response time with respect to each set of N pulses (N&#x3e;1). A solid concentration of the liquid toner is calculated based on the integrated response time.

Solid-concentration measuring apparatus and method thereof, and solid-concentration control system

A full-color electrophotographic apparatus of the present invention is configured such that a toner image is formed on an intermediate transfer member. The intermediate transfer member is heated to a temperature equal to or higher than the softening start temperature of resin contained in a liquid toner and equal to or lower than the withstand temperature of a photoconductor member. A carrier-removing roller to which bias can be applied abuts the intermediate transfer member so as to remove a carrier while packing softened toner by the force of an electric field induced by bias. In a transfer section for transfer to a printing medium, a backup roller presses the printing medium against the intermediate transfer member, and the toner image is transferred from the intermediate transfer member to the printing medium. Before being pressed against the toner image on the intermediate transfer member, the printing medium is heated. Bias is applied to the backup roller such that the toner image on the intermediate transfer is attracted toward the printing medium by the action of an electric field, thereby assisting transfer. By so doing, the intermediate transfer member does not need to undergo cooling before coming into contact with the photoconductor member, thereby avoiding occurrence of thermal damage to the photoconductor member.

Full-color electrophotographic apparatus using liquid toner containing resin

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Ishikawa, Japan

Yoshiro Kawamoto