Image forming apparatus having means for indicating timing of he

Details Image forming apparatus having means for indicating timing of he Image forming apparatus having means for indicating timing of he

1990-10-19

1992-07-14

Hix, L. T.

Photocopying

Projection printing and copying cameras

With developing

355 30, G03B 2732

Patent

active

051307430

ABSTRACT:
An image forming apparatus, for forming and fixing a visible image on a recording medium including a heat-fixing unit for heat-fixing the visible image on the recording medium, a gas purifying unit for removing foul and harmful components from gas emitted from the recording medium in the image fixing process, a counter for accumulatively counting every image fixing process to produce an accumulative number of recording mediums subjected to the image fixing process, a weighting unit for weighting a count value of the counter in accordance with the type of recording medium to be being subjected to the image fixing process and adding a weighted count value to a just-previously accumulated count value to obtain a present accumulative number, and a control unit for monitoring the present accumulative number of the counter and indicating a time for exchange of the gas purifying unit on the basis of the monitored present accumulative number.

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