Developing apparatus

Details Developing apparatus Developing apparatus

1991-07-02

1992-12-15

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355253, 118658, 118661, G03G 2100

Patent

active

051721660

ABSTRACT:
A developing apparatus capable of preventing a leakage of developing powder from being placed on photoconductor of a copying machine, the developing apparatus having a doctor for restricting an amount of developing powder to be placed on said photoconductor of the copying machine includes a unit for storing a developing powder, a roller having a sleeve and a magnet and rotationally supported on the storing unit for laminating the developing powder output from the storing unit on the sleeve in accordance with a magnetic force of the magnet, and a unit for preventing the developing powder from being leaked to a non-imaging area located at end portions of the roller, the preventing unit being located in a upstream side of the storing unit and being so arranged that an interval between the preventing unit and the roller is larger than an interval between the doctor and the roller.

REFERENCES:
patent: 3809012 (1974-05-01), Delvecchio
patent: 4213617 (1980-07-01), Salger
patent: 4676192 (1987-06-01), Yuge et al.
patent: 5057868 (1991-10-01), Sekino et al.
patent: 5084733 (1992-01-01), Katoh et al.

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