Toner layer forming device

Details Toner layer forming device Toner layer forming device

1987-02-11

1989-01-17

Braun, Fred L.

Photocopying

Including fiber optics

118657, G03G 1509

Patent

active

047990864

ABSTRACT:
A toner layer forming device for an electrostatic image reproduction machine having a photosensitive latent image carrier includes a fixed magnet including a plurality of spaced poles of opposite polarity; a non-magnetic sleeve including a developing surface rotatable about the magnet for carrying a thin layer of toner particles and for transferring a portion of the layer to the carrier; a toner supply device for supplying a layer of toner particles onto the surface of the sleeve; a pretrimmer for reducing the thickness of the layer of toner supplied to the sleeve by the supply device upon rotation of the sleeve; and a restriction member braced against the surface of the sleeve for frictionally charging the toner particles on the surface, and for further reducing the thickness of the toner layer to a predetermined value for transfer to the carrier.

REFERENCES:
patent: 4538898 (1985-09-01), Kanno et al.
patent: 4564285 (1986-01-01), Yasuda et al.
patent: 4624545 (1986-11-01), Yasuda et al.
patent: 4662311 (1987-05-01), Shoji et al.

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