Supports – Props and braces – Vacuum hold-down
Patent
1981-08-12
1984-01-03
Thomas, Alexander S.
Supports
Props and braces
Vacuum hold-down
355 73, 355 76, 355 91, 428 81, 428 69, 428157, 428188, 428192, 269 20, G03B 2764
Patent
active
044238517
ABSTRACT:
In copying machines, cameras etc. the blanks (6, 7) are placed between a glass plate and a support consisting of a rubber cloth (1), which is supplied with a circumferential bead (2). By exhaustion of the field of activity (5) of the rubber cloth (1) the blanks (6, 7) are pressed firmly against the glass plate, and in order to obtain an even exhaustion of the whole field (5) the rubber cloth (1) is supplied with a strip (3) of rubber or plastics along the bead (2) with transversing ducts (4), which are in connection with exhaustion openings (9).
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