Suction film holder

Details Suction film holder Suction film holder

1985-05-09

1986-10-28

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 76, 355 87, 355 91, G03B 2760

Patent

active

046195262

ABSTRACT:
A suction film holder for a reproduction camera is formed by a flexible cover in the form of a conveyor band. One or more suction cups and a plurality of transverse grooves are provided in connection with the flexible cover. During the exposure of a sheet of light-sensitive material the transverse grooves tightly abut longitudinal grooves along the rim of an underlying glass plate, the grooves in the glass plate being connectable to an evacuation system.
According to a particularly preferred embodiment air is blown inwards below the flexible cover upon the exposure. In this manner the time for loosening the flexible cover from the underlying glass plate is reduced to 5-10 secs. The blowing in occurs automatically when the vacuum is removed by means of an inflatable membrane in a box situated parallel to a pressurized valve communicating with the vacuum pump. The membrane is thereby blown up by means of vacuum and blows automatically the air inwards below the flexible cover when the vacuum is removed.

REFERENCES:
patent: 2519610 (1950-08-01), Sussin

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