Minolta Camera Kabushiki Kaisha

Hideaki Hirahara

Hiroshi Mizuno

Toshiya Natsuhara

Shinya Matsuda

Toshimitsu Fujiwara

Hiromitsu Saijo

Masaru Komura

Satoshi Deishi

Masami Matsuura

Kazuya Ishida

Tatsuo Takabe

Hideo Yamaki

A developing device comprising: a drive roller which is driven so as to be rotated; a developing sleeve which is formed by a thin film and has a peripheral length slightly larger than that of the drive roller so as to be fitted around the drive roller; a press member which presses the developing sleeve against the drive roller at one side of the drive roller so as to form a sag portion of the developing sleeve such that the sag portion is brought into contact with an electrostatic latent image support member; and an electric field forming member for forming alternating electric field such that an attractive force capable of bringing the developing sleeve and the electrostatic latent image support member into contact with each other is applied between the developing sleeve and the electrostatic latent image support member.

Developing device brought into contact with an electrostatic latent

An electrostatic latent image developing apparatus has a developing sleeve, an agitating roller rotatable in the same direction as the developing sleeve and a magnetic device fixedly provided within the developing sleeve and having a plurality of N and S poles which include auxiliary poles of the same polarity adjacent to each other circumferentially of the sleeve and opposed to the agitating roller. A developer restraining plate between the developing sleeve and the agitating roller has a first guide surface for guiding the developer supplied by the agitating roller and a second guide surface for limiting the developer used from moving toward the sleeve portion to which the developer is supplied by the agitating roller.

Electrostatic latent image developing apparatus

Growing community of inventors

Ayase, Japan

Hideaki Hirahara