Image forming device

Details Image forming device Image forming device

1992-05-11

1994-01-04

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355210, G03G 1500

Patent

active

052764800

ABSTRACT:
An image forming device of clamshell type has an upper frame and a lower frame. The upper frame has a bottom face and includes an optical unit for emitting a scanning light. The lower frame has a photosensitive body therein and supports the upper frame openably around the horizontal supporting shaft. The bottom face of the upper frame has an exposure port for emitting the scanning light to expose the photosensitive body in the lower frame. The device is provided with a light shield plate, supported inside the upper frame rotatably by a first fixed shaft, for closing the exposure port. A torsion coil spring is wound around the first fixed shaft and urges the light shield plate in the direction of closing the exposure port. The light shield plate is connected to a prime mover supported in the upper frame rotatably by a second fixed shaft through a connecting rod in such a manner that the turn of the prime mover about the second fixed shaft causes the turn of the light shield plate about the first fixed shaft. The lower frame is provided with a working body coming into contact with the prime mover and turning it against a force of the torsion coil as the upper frame is closed to open the exposure port.

REFERENCES:
patent: 4750015 (1988-06-01), Ogura et al.
patent: 4943815 (1990-07-01), Aldrich et al.
Communication from the corresponding German Patent Office dated Apr. 21,1993 with translation.

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