Photographic apparatus for use in making printing plates

Details Photographic apparatus for use in making printing plates Photographic apparatus for use in making printing plates

1978-05-15

1979-12-25

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Producing plural rows of pictures on photosensitive paper

355 74, G03B 2744

Patent

active

041803205

ABSTRACT:
An apparatus for use in making printing plates in which a sheet of photo-sensitive material is held by a hanger and moved horizontally and vertically. Successive areas are, in this manner, aligned with a projector and exposed to separate images, each image corresponding to one page of a book. Telescoping cylinders produce the desired movement of the sheet in discrete steps so the position of the sheet need not be manually adjusted for each image. Fine adjustment of the position of the image on the sheet is obtained by moving two positioning rollers while the image is projected onto a movable registration screen that blocks the projection of the image onto the sheet until after the adjustment has been made.

REFERENCES:
patent: 3907426 (1975-09-01), Goodliffe
patent: 3998546 (1976-12-01), Wally, Jr. et al.

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