Exposing frame

Details Exposing frame Exposing frame

1986-09-17

1987-09-01

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 75, G03B 2758

Patent

active

046905472

ABSTRACT:
A device for holding photosensitive material during light exposure which comprises two planar frames of equal size, each of which has two parallel walls and rounded corners, one frame at least being open between its four walls, each frame carrying around its peripheral walls a band of resilient material of rounded cross-section which when the device is in the non-use state is so mounted that part of the band is held above walls of the frame, the sides of each frame being bevelled outwards, together with means to hold in position the two frames separated from each other with the bands of resilient material facing each other, means to force the two frames together so that the bands contact each other substantially over their entire length and force each other down the walls of each frame and means to hold securely the two frames in this position.
The device is of particular use for exposing holographic film material.

REFERENCES:
patent: 1973827 (1934-09-01), Shwartz
patent: 2824491 (1958-02-01), Hoffmaster
patent: 2959096 (1960-11-01), Bobeck et al.
patent: 3051039 (1962-08-01), Wight
patent: 3288027 (1966-11-01), Ruzicka
patent: 3469917 (1969-09-01), Pignone

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