Image forming apparatus capable of heating a toner image on an i

Details Image forming apparatus capable of heating a toner image on an i Image forming apparatus capable of heating a toner image on an i

1997-08-08

1999-03-30

Pendegrass, Joan

Electrophotography

Image formation

Transfer

430124, G03G 1516, G03G 1520

Patent

active

058900438

ABSTRACT:
An image forming apparatus and an image forming method for transferring and fixing is capable of securely transferring and fixing a toner image onto a recording medium after transferring the toner image formed on an image carrier onto an image transfer member with small energy consumption for high-speed printing. In this apparatus an endless belt-like intermediate transfer member facing to four image forming units is tensioned by a heating roll and the like, and a pressing member for pressing the recording medium against the intermediate transfer member in the most downstream portion of a contact area with the heating roll in the rotational direction of the intermediate transfer member. The toner image on the intermediate transfer member is heated by the heating roll at specified temperatures, and the toner melted is brought into tight contact with the recording medium at normal temperatures for transferring and fixing. The temperature of toner at the outlet of the pressure-contact portion with the pressing member is caused to lower below the toner softening point temperature. At this time, the recording medium serves as a cooling member.

REFERENCES:
patent: 4542978 (1985-09-01), Tarumi et al.
patent: 4992833 (1991-02-01), Derimiggio
patent: 5629761 (1997-05-01), Theodoulou et al.

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