Heat roller fixing device

Details Heat roller fixing device Heat roller fixing device

1990-10-03

1992-05-05

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355204, 355290, 355295, G03G 1520

Patent

active

051112493

ABSTRACT:
A fixing device for use in a copying machine for fixing a toner image on the surface of a recording sheet. The fixing device conveys the recording sheet between a pair of rollers consisting of a heating roller and a pressure roller to fix the toner image on the surface of the recording sheet by heating the toner image with the heating roller. After a number of recording sheets have been fixed as a batch, the pair of rollers separate from each other and stop rotating if the batch of recording sheets are smaller in number than a predetermined number, whereas the pair of rollers continue rotating in press contact with each other for a predetermined time interval after the batch of recording sheets have been fixed if the batch of recording sheets are larger in number than the predetermined number.

REFERENCES:
patent: 4595274 (1986-06-01), Sakurai
patent: 4920250 (1990-04-01), Urban

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