Transfer device configuration in an image-reproducing station

Details Transfer device configuration in an image-reproducing station Transfer device configuration in an image-reproducing station

1996-01-03

1997-03-25

Lee, Shuk Yin

Electrophotography

Having particular structure

Modular or displaceable

399125, 399315, G03G 1514

Patent

active

056149972

ABSTRACT:
A configuration is provided for a pair of sheet-feeding registration rollers, a transfer device, and an image-forming photo-sensitive drum in an image reproducing apparatus particularly of the clamshell-type construction. The transfer device has a sheet-charging discharge wire for transferring a toner-developed image on the photo-sensitive drum to a copy sheet. A case for the transfer device includes a synthetic-resin housing which retains the discharge wire and is fitted into a shield frame. The shield frame is configured together with at least one bracing spring to constitute a positioning mechanism for maintaining a predetermined parallel spacing lengthwise between the discharge wire and the cylindrical surface of the photo-sensitive drum, the positioning mechanism therein elastically abutting specially formed lengthwise ends of the shield frame against either of lower ends of a housing containing the photo-sensitive drum. The upstream end of the transfer device case is configured to be freely pivotal about an axis of the lower of the registration rollers.

REFERENCES:
patent: 4466729 (1984-08-01), Iwata
patent: 5175589 (1992-12-01), Kimura
patent: 5233393 (1993-08-01), Yoshida et al.
patent: 5479239 (1995-12-01), Ishida et al.
patent: 5502554 (1996-06-01), Hayashi et al.

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