Image forming apparatus for forming an original image and an add

Details Image forming apparatus for forming an original image and an add Image forming apparatus for forming an original image and an add

1989-12-22

1991-05-14

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355 71, 355218, 358474, G03G 2100

Patent

active

050160486

ABSTRACT:
An image forming apparatus is provided for forming a first image and a second image on a photosensitive material. The apparatus includes a first light device for emitting light in accordance with the first image which follows a first path so as to be incident on said photosensitive material. A second light device emits light in accordance with the second image which follows a second path so as to be incident on said photosensitive material. A shutter mechanism selectively blocks the light emitted by the first light device. A control device controls the second light device so that the second light device emits light in accordance with the second image onto a shadow portion of the photosensitive material, the shadow portion being formed when the shutter device blocks the light emitted by the first light device. A first motor moves the shutter device in a first direction. A second motor moves the shutter device in a second direction perpendicular to the first direction and moves the shutter device between a first position outside the first path of light from the first light device and a second position within the first path of light for blocking the light emitted by the first light device.

REFERENCES:
patent: 4371898 (1983-02-01), Nakamura
patent: 4474464 (1984-10-01), Kanai et al.
patent: 4490032 (1984-12-01), Conly et al.
patent: 4731623 (1988-03-01), Oda et al.
patent: 4905043 (1990-02-01), Satou et al.
NP-4835 Manual for Canon (translation attached) Aug. 1988.

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