Photocopying – Contact printing – Light boxes
Patent
1983-05-13
1985-03-19
Mathews, A. A.
Photocopying
Contact printing
Light boxes
355 54, 355 66, 346110R, G03B 2900
Patent
active
045055610
ABSTRACT:
An apparatus for transmitting pictures from a screen to pre-determined panels on a film sheet has a film sheet, a screen, two 45.degree. mirrors which are disposed in a ray path between the screen and the film sheet, a lens system which is disposed in the ray path, the optical axis of which is parallel to the film sheet, a moving device along one of the edges of the film sheet for moving the film sheet in an image plane of the film sheet, and additional moving devices for moving the screen, the 45.degree. mirrors and the lens system. The screen is parallel to the image plane of the film sheet. A base is provided which is parallel to the film sheet. A swivel flange is provided coaxial with the central axis of the screen which can be swivelled about the base through at least 180.degree. and which is optically open towards the screen. An extension housing is carried on the base, in which the 45.degree. mirrors together with the lens system are accommodated and which can be swivelled with the base through at least 180.degree. and is optically open towards the film sheet. The optical axis of the extension housing is parallel in the 0.degree. position and in the 180.degree. position. And the length of the optical axis of the extension housing equals approximately half the length of the diagonal of the panels.
REFERENCES:
patent: 4103310 (1978-07-01), Yasillo
patent: 4191962 (1980-03-01), Sramek
patent: 4285587 (1981-08-01), Schiff et al.
patent: 4343543 (1982-08-01), Schiff et al.
Beckman Leo H.
Groeneweg Abraham
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