Direct duplex printing on pre-cut copy sheets

Details Direct duplex printing on pre-cut copy sheets Direct duplex printing on pre-cut copy sheets

1981-02-27

1984-01-24

Prescott, A. C.

Photocopying

Including fiber optics

355 3R, 355 14FU, 355 14R, 355 24, G03G 1500

Patent

active

044272855

ABSTRACT:
The present invention is a two photoreceptor, single pass duplex reproduction system having a heat insulating prefuser transport device and first and second transfer stations. In particular, the prefuser transport is a pair of cold, toner compacting rolls adjacent the second transfer station for immediate pick up of a copy sheet supporting unfused images on both sides. The compacting rolls tack the unfused images to the copy sheet. The compacting rolls also insulate the photoreceptor from the heat of the fuser and convey the copy sheet immediately to the fuser. The fuser permanently fixes the images onto the copy sheet in one fuser operation. In a preferred embodiment, the fuser rolls operate at a slightly lower peripheral velocity than the compacting rolls. Also, because of the tacking of the image by the cold rolls, the fuser rolls operate at a relatively lower temperature or pressure than normally.

REFERENCES:
patent: 3900590 (1975-08-01), Dhoble
patent: 3944360 (1976-03-01), Deetz et al.
patent: 4059394 (1977-11-01), Ariyama et al.
patent: 4116558 (1978-09-01), Adamek et al.
patent: 4218499 (1980-08-01), Shinohara et al.

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