Controlling method of a copying machine

Details Controlling method of a copying machine Controlling method of a copying machine

1985-03-27

1987-06-09

Braun, Fred L.

Photocopying

Including fiber optics

219216, 355 14FU, G03G 1320, G03G 1520

Patent

active

046716432

ABSTRACT:
A method for controlling a copying machine having a copying cycle and fusing device. The fusing device is formed of a rotatable heating roller and a press roller in mutually forcible contact with the heating roller, which fuses a toner image on a copying paper at a fusing temperature upon passage through the rollers. The heating roller is heated to a first temperature above the fusing temperature. The copying cycle is delayed during a first interval of time after the heating roller reaches the first temperature. The copying cycle is set to a wait-reset state after the first time interval. The heating roller is cooled to a second temperature below the fusing temperature and the copying cycle is set to a wait state. The heating roller is heated from the second temperature to the fusing temperature during a second interval of time. The copying cycle is restored to the wait-reset state during the second time interval before the heating roller reaches the fusing temperature. The copying cycle is restored to the wait-reset state before a leading edge of the copying paper reaches the fusing device. In addition, the fusing device is at the fusing temperature when the leading edge passes between the rollers.

REFERENCES:
patent: 3926519 (1975-12-01), Rebres
patent: 4318612 (1982-03-01), Brannan et al.
patent: 4385826 (1983-05-01), Itol
patent: 4512649 (1985-04-01), Derimiggio

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