Toner image fixing device

Details Toner image fixing device Toner image fixing device

1987-05-18

1988-04-12

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3FU, 219216, G03G 1500

Patent

active

047378182

ABSTRACT:
A toner image fixing device to be incorporated into an electrophotographic copying machine or the like, comprises fixing rollers internally provided with heating means, temperature detecting means for detecting the respective surface temperatures of the fixing rollers, and control means which controls the fixing rollers for preliminary rotation prior to copying operation on the basis of the surface temperature difference between the fixing rollers and a predetermined value. In starting up the electrophotographic copying machine, the preliminary rotation of the fixing rollers is started after the temperature difference between the fixing rollers has reached to a predetermined value to enable heat energy to be transferred from one of the fixing rollers to the other and to eliminate the uneven temperature distribution. The preliminary rotation of the fixing rollers is stopped a predetermined time after the surface temperature of one of the fixing rollers has reached to a predetermined temperature.

REFERENCES:
patent: 4385826 (1983-05-01), Itoh
patent: 4556779 (1985-12-01), Hashimoto et al.
patent: 4595274 (1986-06-01), Sakurai
patent: 4609278 (1986-09-01), Taniguchi

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