Device for displaying warm-up waiting time of image forming appa

Details Device for displaying warm-up waiting time of image forming appa Device for displaying warm-up waiting time of image forming appa

1988-10-19

1990-04-03

Braun, Fred L.

Photocopying

Contact printing

Light boxes

219216, 355209, 355290, G03G 2100

Patent

active

049144766

ABSTRACT:
A device installed in a copier, facsimile apparatus or similar image forming apparatus of the type including a fixing unit displays a waiting time necessary for the warm-up of the apparatus. The device calculates an elevation rate of fixing temperature within a predetermined time interval, produces a difference between a current temperature of the fixing unit and a set fixing temperature on the basis of the elevation rate, and thereby determines a waiting time. Further, the waiting time is determined on the basis of a temperature inside the apparatus when the ambient temperature is comparatively low and on the basis of a temperature of the fixing unit when it is higher than a predetermined level.

REFERENCES:
patent: 4373802 (1983-02-01), Yuge et al.
patent: 4618247 (1986-10-01), Tsuji
patent: 4672177 (1987-06-01), Headrick
patent: 4686351 (1987-08-01), Nakauchi
patent: 4821062 (1989-04-01), Katoh et al.

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