Photography pin board system

Details Photography pin board system Photography pin board system

1986-01-30

1987-01-13

Hayes, Monroe H.

Photocopying

Contact printing

Fluid pressure retention of carrier and receiver in exposure...

355 73, 355 76, 355 79, G03B 2720

Patent

active

046360670

ABSTRACT:
An improved pin board system for use within a vacuum contact frame includes a two piece pin board arrangement with an elastomeric gasket sheet. The primary pin board is relatively thin, but stiff, so that it can flex slightly in response to the force of the vacuum frame's pressure blanket. Alignment pins "float" slightly within oversized holes and are spring loaded against the pin board by means of the elastomeric backing. A vacuum port and manifold board, similar in material and thickness to the primary pin board provides a vacuum connection with the top surface of the pin board. An elastomeric gasket sheet, upon which the two boards of the assembly rest, provides a vacuum seal when the combination is pressed against a covering glass of a vacuum frame.

REFERENCES:
patent: 3463586 (1969-08-01), Carlson et al.
patent: 3634009 (1972-01-01), Van Dusen
patent: 3771870 (1973-11-01), Taylor
patent: 4284349 (1981-08-01), Beasley et al.
patent: 4504142 (1985-03-01), Richards

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