Device for screening a photoconductive element unit from externa

Details Device for screening a photoconductive element unit from externa Device for screening a photoconductive element unit from externa

1988-12-23

1990-07-10

Moses, R. L.

Photocopying

Contact printing

Light boxes

346145, 346160, 3461601, 355210, 355212, 355215, G03G 1500

Patent

active

049410156

ABSTRACT:
In a laser printer or similar electrophotographic image recorder of the type having a photoconductive element subunit including a photoconductive drum and an upper and a lower unit which are hinged together and each is loaded with a different group of structural parts and elements inclusive of the subunit, a device for screening the drum includes a screening member which is movable in interlocked relation to opening and closing motions of the upper unit. The screening member covers the drum when the upper unit is opened and uncovers it when the upper unit is closed. When the image recorder is in operation with the upper unit being closed, the drum is uncovered to allow a laser beam to reach the drum. When the image recorder is out of operation with the upper unit being opened, the screening member covers the drum in response to an opening motion of the upper unit so as to screen the drum against external light.

REFERENCES:
patent: 4588280 (1986-05-01), Ogawa et al.

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