Image forming apparatus having a high-voltage unit malfunction d

Details Image forming apparatus having a high-voltage unit malfunction d Image forming apparatus having a high-voltage unit malfunction d

1987-02-03

1989-01-10

Grimley, Arthur T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3CH, 355 14R, 355 14TR, G03G 1500

Patent

active

047977051

ABSTRACT:
An image forming apparatus includes a rotatable photosensitive member and is adpated to form an image on a paper by steps of charging the photosensitive member with a main charger, exposing to form an electrostatic latent image, developing the latent image with a toner, transferring the toner image to a paper with transferring charger. Furthermore the apparatus includes a sensor to detect the amount of the toner adhering to the photosensitive member or to the paper so as to detect a malfunction in the main charger or in the transferring charger.

REFERENCES:
patent: 4286036 (1981-08-01), Hendriksma
patent: 4313671 (1982-02-01), Kuru
patent: 4372672 (1983-02-01), Pries
patent: 4377338 (1983-03-01), Ernst
patent: 4502778 (1985-03-01), Dodge et al.
patent: 4571068 (1986-02-01), Tarumi et al.

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