Hitachi Koki Co., Ltd.

Kouji Doi

Hiroshi Ueno

Youichi Takeuchi

Yoshio Ogura

Koutaro Yamada

Yukio Otome

Yasuyuki Tsuji

Kunitomo Takahashi

Youji Hirose

Shuuho Yokokawa

Regulating parts E, F, of a developing agent regulating member 6, are arranged opposite to a photosensitive drum 7 with respect to a line connecting the centers of a developing roll 5 having a sleeve rotating in the direction of a and a developing roll 8 having a sleeve rotating in the direction of b. Holding members 10 which are slidable on the side plate of a developing apparatus are respectively provided at both ends of the developing agent regulating member. Developing agent is supplied from developing roll 5 to developing roll 8 through a back surface of the developing agent regulating member 6.

Developing apparatus having developer regulating member

A developing unit for an electrophotographic apparatus comprises a photosensitive body for forming a latent image thereon, a developing roll utilizing two-component developer containing toner and carrier to develop the latent image formed on the photosensitive body, a recovery roll, provided downstream of the developing roll, for recovering carrier from a surface of the photosensitive body, and at least one recess formed in an inner surface of the developing unit which is confronted with an outer cylindrical surface of the recovery roll, in such a manner that air pressure formed in the recess prevents the developer from scattering out of the developing unit.

Developing unit for an electrophotographic apparatus

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Ibaraki, Japan

Kouji Doi