Apparatus for forming images on both sides of sheet

Details Apparatus for forming images on both sides of sheet Apparatus for forming images on both sides of sheet

1998-07-01

1999-07-27

Grimley, Arthur T.

Electrophotography

Image formation

Transfer

399 44, 399 45, G03G 1516

Patent

active

059305720

ABSTRACT:
An apparatus for forming a toner image on a sheet, comprises first and second process units each comprising a photoreceptor, a charging device, an imagewise exposing device, and a developing device. The first process unit forms a first toner image on its photoreceptor and the second process unit forms a second toner image on its photoreceptor. A rotatable intermediate transfer member has a toner image receiving surface, and the first and second process units are located in close proximity to the toner image receiving surface of the rotatable intermediate transfer member. A second transfer device transfers the second toner image from the second process unit to the toner image receiving surface. A sheet feeder feeds the sheet to the toner image receiving surface so that the second side of the sheet is provided with the second toner image; and a first transfer device transfers the first toner image from the first process unit to the first side of the sheet on the toner image receiving surface.

REFERENCES:
patent: 4714939 (1987-12-01), Ahern et al.
patent: 5797077 (1998-08-01), Samizo et al.
patent: 5799226 (1998-08-01), Shigeta et al.

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