Image forming apparatus having replaceable element which is repl

Details Image forming apparatus having replaceable element which is repl Image forming apparatus having replaceable element which is repl

1991-12-13

1993-06-01

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355203, 355204, G03G 2100

Patent

active

052164640

ABSTRACT:
An image forming apparatus which includes a replaceable element which is replaced in predetermined amount of use and predicting apparatus for predicting the time when the predetermined amount of use of the element is to be reached. The predicting apparatus predicts the time based on amount of use of the element per unit time and remaining amount of use of the element.

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patent: 5021828 (1991-06-01), Yamaguchi et al.
patent: 5036361 (1991-07-01), Filion et al.
patent: 5066978 (1991-11-01), Watarai et al.

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