Photocopying – Projection printing and copying cameras – Multicolor picture
Patent
1977-07-27
1978-12-05
Griffin, Donald
Photocopying
Projection printing and copying cameras
Multicolor picture
355 53, 355 74, 355 77, G03B 2732, G03B 2742, G03B 2758
Patent
active
041283317
ABSTRACT:
An apparatus for making reproductions or negatives for plate making comprises a base frame, a vertical supporting post secured at its lower end to the base frame, a master copy holding frame spaced above the base frame and vertically movably supported on the supporting post, a light source on the master copy holding frame, a lens system on the underside of the master copy holding frame and a copy paper holding plate on the base plate. The light source, the lens system and the copy paper holding plate are so positioned relative to one another as to be aligned with the axis of light emitted by the light source. The master copy holding plate carries a movable plate which is horizontally movable both longitudinally and transversely of the master copy holding frame. A master film holding plate is adapted to support a plurality of master films thereon and be removably secured to the movable plate which is movable to position the master films selectively for exposure to the light. The master copy holding frame is provided with a masking cover for selective exposure of the master films to light. The lens system is vertically movable and the copy paper holding plate carries a focusing plate which is horizontally movable both longitudinally and transversely of the copy paper holding plate. A plurality of horizontally movable overlays are provided above the focusing plate. A supporting post is of the hollow construction and contains a pair of vertical rods which respectively effect the vertical movement of the master copy holding frame and the lens system.
REFERENCES:
patent: 2415424 (1947-02-01), Gaebel
patent: 2605675 (1952-08-01), Mourfield
patent: 3938887 (1976-02-01), Nygaard et al.
patent: 4043660 (1977-08-01), Wingerter
patent: 4047813 (1977-09-01), Spence-Bate
patent: 4057347 (1977-11-01), Moriyama et al.
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