Developing unit of an electrophotographic apparatus having impro

Details Developing unit of an electrophotographic apparatus having impro Developing unit of an electrophotographic apparatus having impro

1997-08-25

1999-01-05

Grimley, Arthur T.

Electrophotography

Image formation

Development

399258, 399272, 399281, G03G 1508

Patent

active

058571345

ABSTRACT:
A developing unit having a frame mounted in an electrophotographic apparatus with a photosensitive drum uses an agitator agitating toner contained in a toner receptacle of the frame of the developing unit, a developing roll for developing a latent image formed on the surface of the photosensitive drum with the toner, at least one toner supply roll with a cross-shaped blade mounted on a shaft for supplying the agitated toner to the developing roll, and a doctor blade for regulating the thickness of the toner layer formed on the toner developing roll so that the thickness of the toner layer is maintained at a given level. Each branch of the cross-shaped blade is tapered toward an outer end at a given angle so as to properly supply the toner to the developing roll.

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