Photocopying – Contact printing – Light boxes
Patent
1994-01-10
1995-07-25
Braun, Fred L.
Photocopying
Contact printing
Light boxes
G03G 1504, G03G 2100
Patent
active
054366992
ABSTRACT:
A photosensitive drum earthing mechanism includes an engaging clutch having a drive-side clutch member and a drum-side clutch member. The drum-side clutch member is fixed to an image carrier in a photosensitive drum and is connectable in a circumferential direction to the drive-side clutch member. The clutch members transmit torque to the image carrier. A conducting portion provided with the drum-side clutch member electrically connects the image carrier to a conductive portion of the drive-side clutch member. This conducting portion is disposed on an inner peripheral end of the image carrier and has a connecting projection which passes through the drum-side clutch member to engage engaging claws of the clutch members so that the connecting projection is electrically connected in the circumferential direction with the drive-side clutch member. The drum-side clutch member may include a flange portion made of an insulating material which is mounted on an inner periphery of the conductive image carrier and an engaging portion made of a conductive material which is electrically and mechanically connectable to a claw of the drive-side clutch member. A supporting pin made of metal may be used to align the drum-side clutch member and the drive-side clutch member. This supporting pin may rotatably slide contact the drive-side clutch member.
REFERENCES:
patent: 4839690 (1989-06-01), Onoda et al.
patent: 5023660 (1991-06-01), Ebata et al.
patent: 5128715 (1992-07-01), Furuyama et al.
patent: 5210574 (1993-05-01), Kita
patent: 5303004 (1994-04-01), Maruyama et al.
Braun Fred L.
Mita Industrial Co. Ltd.
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