Brush toning means for electrophotographic copier apparatus

Photocopying – Including fiber optics

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Details

355 14D, 118657, 118122, G03G 1508

Patent

active

045360758

ABSTRACT:
A toning system for an electrostatic copying machine capable of developing a latent charge image carried therepast on an electrophotographic member moved through an endless path including an arcuate section. A rotary magnetic brush is journalled for rotation on an axis parallel to the arcuate section. A toner layer is applied to at least a portion of the circumference of the brush and brought into engagement with the electrophotographic member at the arcuate section. A hopper carries a quantity of toner and a cylindrical formation is connected to the bottom of a hopper carrying a quantity of toner and spaced from and encompasses all but a segment of the volume occupied by said brush. The hopper has a wall which provides a bottom edge spaced from the surface of said brush to form a metering blade adjacent said segment. The segment extends from the blade to the electrophotographic member, the brush being rotatable in a direction so that a layer of toner is metered onto the brush and is carried through said segment into engagement with said electrophotographic member.

REFERENCES:
patent: 3937572 (1976-02-01), Gaynor et al.
patent: 3958879 (1976-05-01), Hamaguchi et al.
patent: 4025180 (1977-05-01), Kurita et al.
patent: 4275956 (1981-06-01), Bell et al.
patent: 4324490 (1982-04-01), Burnham

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