Drum unit and earth plate used in the drum unit

Details Drum unit and earth plate used in the drum unit Drum unit and earth plate used in the drum unit

1998-05-21

1999-08-24

Lee, S.

Electrophotography

Machine operation

Electrical connection

399116, 174 51, G03G 2100

Patent

active

059435275

ABSTRACT:
A photosensitive drum unit for an electrostatographic printing apparatus is disclosed. The drum unit includes a drum tube formed with at least one opening at one axial end thereof. A flange member is configured to be inserted into the opening in the drum tube. The flange member is provided with a support hole into which a shaft pin is inserted for supporting the drum tube and flange member. An earth plate is formed with projections or claws that extend radially outward from a peripheral edge of the earth plate such that the projections contact with an inner peripheral surface of the drum tube. The earth plate is also formed with a pair of contact pieces extend axially away from the earth plate and also extend toward one another. The contact pieces are spaced apart from one another by a predetermined distance but are also configured to contact and engage a portion of the shaft pin.

REFERENCES:
patent: 4839690 (1989-06-01), Onoda et al.
patent: 5052090 (1991-10-01), Kitaura et al.
patent: 5436699 (1995-07-01), Komaki
patent: 5729792 (1998-03-01), Ikehara
patent: 5752136 (1998-05-01), Sanchez et al.
Mita Drawings 1 and 2 of Ground Plate sold in US beginning Jul. 1994.

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