Image forming apparatus with layer thinning detection

Details Image forming apparatus with layer thinning detection Image forming apparatus with layer thinning detection

1991-06-13

1992-11-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355210, G03G 2100

Patent

active

051609673

ABSTRACT:
An apparatus for forming an image of a document, capable of charging a photoconductor by using a charging device includes a unit for detecting a value of a flowing current into the photoconductor, a unit for comparing the value of the flowing current with a predetermined life time current value of the photoconductor, and a unit for determining a layer thinning of the photoconductor at a time when the value of the flowing current exceeds the predetermined life time current value of the photoconductor so that the layer thinning is indicated.

REFERENCES:
patent: 4136945 (1979-01-01), Stephens
patent: 4551000 (1985-11-01), Kanemitsu et al.
patent: 4585327 (1986-04-01), Suzuki
patent: 4851875 (1989-07-01), Tanimoto
patent: 4935777 (1990-06-01), Noguchi et al.

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