Conductive assembly for a drum in an image forming apparatus

Details Conductive assembly for a drum in an image forming apparatus Conductive assembly for a drum in an image forming apparatus

1997-12-19

1998-12-01

Grimley, Arthur T.

Electrophotography

Machine operation

Electrical connection

399117, 399159, 492 47, G03G 1500, G03G 2100

Patent

active

058451730

ABSTRACT:
An improved grounding plate or contact assembly is provided for a photosensitive drum of an image forming apparatus such as a printer or photocopier. The arrangement ensures contact between the grounding plate/contact assembly and a contact area disposed on an interior surface of the drum regardless of the rotational orientation of the grounding plate/contact assembly with respect to the drum. In a preferred form of the invention, the grounding plate includes a plurality of circumferentially spaced contact members and is mounted upon a flange which is inserted into the end of the drum. Since the circumferential spacing of the contact members is less than a length of a laser scribed contact area on the interior surface of the drum, contact between the laser scribed area or patch and one of the contact members is ensured despite variations in the rotational or angular position of the flange with respect to the drum. Additional advantages are provided by the arrangement of the radially outwardly extending contact members with respect to a radially inwardly projecting contact member (which contacts a grounding shaft) so that satisfactory contact is not diminished by deflection of the contact members as the flange is assembled onto a drum and a grounding shaft is inserted through the flange.

REFERENCES:
patent: 5576803 (1996-11-01), Williams et al.
patent: 5599265 (1997-02-01), Foltz
patent: 5613931 (1997-03-01), Maty
patent: 5729792 (1998-03-01), Ikehara
patent: 5752136 (1998-05-01), Sanchez et al.

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