Photocopying – Contact printing – Frames
Patent
1986-04-07
1987-06-23
Wintercorn, Richard A.
Photocopying
Contact printing
Frames
G03B 2704
Patent
active
046748687
ABSTRACT:
A printing frame for the preparation of copies from a master. The printing frame has a mat which is secured to a base plate such that the mat is free to shift in all directions. Photographic material and the master are placed on the mat, and a transparent plate is placed over the material and the master. Vacuum is applied to the frame to adhere the mat, the material and the master to the transparent plate. Because the mat can move freely, hollow spots or non-adhering spaces are eliminated.
REFERENCES:
patent: 2399975 (1946-05-01), Ball
patent: 4450536 (1984-05-01), Schroeder
patent: 4533240 (1985-08-01), Jasperson
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