Brush charger and image forming apparatus

Details Brush charger and image forming apparatus Brush charger and image forming apparatus

1993-08-10

1995-09-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

361225, G03G 1502

Patent

active

054501717

ABSTRACT:
Disclosed are a brush charger for preventing a rotary conductive brush, which contacts a latent image carrier to charge it, from bending along the rotary shaft of the conductive brush, and an image forming apparatus using this brush charger. The brush charger comprises a conductive rotary shaft; a conductive brush provided around the conductive rotary shaft in such a way that the tip of the conductive brush contacts the latent image carrier; a voltage source for applying a charging voltage to the conductive rotary shaft; elastic insulating members provided at both ends of the conductive rotary shaft, for restricting end portions of the conductive brush from spreading along the conductive rotary shaft; and stationary members respectively provided at one ends of the elastic insulating members, for compressing the elastic insulating members toward the conductive brush. The image forming apparatus comprises an endless latent image carrier; a brush charger for charging the endless latent image carrier, which includes the same components as the above-described brush charger; a image forming unit for forming an electrostatic latent image on the charged endless latent image carrier; and developing unit for developing the electrostatic latent image on the endless latent image carrier.

REFERENCES:
patent: 4336565 (1982-06-01), Murray et al.
patent: 4455078 (1984-06-01), Mukai et al.
patent: 4706320 (1987-11-01), Swift
patent: 4761709 (1988-08-01), Ewing et al.
patent: 5196892 (1993-03-01), Mitsuaki
patent: 5245386 (1993-09-01), Asano et al.
patent: 5287146 (1994-02-01), Uno et al.

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