Pressure roller driver for sheet forwarding apparatus

Details Pressure roller driver for sheet forwarding apparatus Pressure roller driver for sheet forwarding apparatus

1993-09-23

1995-01-24

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

355271, 355273, 271275, G03G 1514

Patent

active

053846303

ABSTRACT:
A sheet forwarding apparatus for supporting a sheet on a transfer drum in a electrophotographic copying machine, onto which a toner image on a photoreceptor drum is transferred, which apparatus includes a pressure roller for pressing the sheet onto the transfer drum while forwarding. An arm member supports the pressure roller and is pivotable around a shaft so as to cause the pressure roller to alternately contact and distance from the transfer drum. An oscillating unit is included for oscillating the arm member, and to apply a constant pressure to the sheet through the pressure roller when the pressure roller is in contact with the transfer drum.

REFERENCES:
patent: 4183658 (1980-01-01), Winthaegen
patent: 4541709 (1985-09-01), Kampschreur
patent: 4908674 (1990-03-01), Fukano et al.
patent: 5168290 (1992-12-01), Tanaka et al.
patent: 5170209 (1992-12-01), Tompkins et al.
patent: 5189470 (1993-02-01), Matsuda et al.
patent: 5305068 (1994-04-01), Sato et al.

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