Minolta Camera Kabushiki Kaisha

Shigemitu Shimizu

Kenji Shibazaki

Tomoji Murata

Yutaka Irie

Shunji Yamamoto

Toshio Yamamoto

Yukio Tokura

Isao Iizaka

Osamu Miyamoto

Takashi Hikosaka

An electrophotographic copying apparatus incorporating therein an improved developing material supplying device which supplying device includes a copy paper detecting unit for detecting the length of the copy paper, an integrating circuit for integrating the length of the copy paper detected by the detecting unit and a supply tank driving unit which operates the supply tank to supply a concentrated developing material into the developing tank through a valve, upon receipt of a signal from the integrating circuit, by which arrangement, the concentrated developing material can be supplied to the developing tank every time after a predetermined length of the copy paper is fed through the developing tank.

Toner dispensing device with electrical integrating circuit

Apparatus for improving the quality of images obtained in an electrostatic latent image transfer type copier according to which there are provided electrical circuits permitting escape or neutralization of charges which may be produced in copy paper during its transport through a photocopying machine and could cause smudging or elimination of required image portions in developed copy paper carrying the image of a document or similar material. In the disclosed embodiment, the electrical circuits maintain each of the rollers of pairs of copy sheet transporting rollers at an equal potential.

Electrostatic latent image transfer type copying apparatus

Growing community of inventors

Toyokawa, Japan

Shigemitu Shimizu