Exposing apparatus used in fabrication of printed circuit boards

Details Exposing apparatus used in fabrication of printed circuit boards Exposing apparatus used in fabrication of printed circuit boards

1988-11-22

1989-12-19

Berman, Jack I.

Radiant energy

Irradiation of objects or material

2504922, 378 34, 355 78, 355 87, 355 91, G03B 2704

Patent

active

048884880

ABSTRACT:
An exposing apparatus arranged, while peripherally sealing a space between an original and a material to be exposed by a packing of elastic material, to evacuate the space to thereby ensure intimate contact between the original and the material to be exposed, the exposing apparatus being characterized in that the packing is hollow so as to make it possible to change its thickness by changing its internal pressure.

REFERENCES:
patent: 3625611 (1971-12-01), Orr et al.
patent: 4648106 (1987-03-01), Novak

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