Photocopying – Projection printing and copying cameras – Detailed holder for original
Patent
1980-03-03
1982-02-02
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Detailed holder for original
352 72, G03B 2762, G03B 2764
Patent
active
043136770
ABSTRACT:
A neghold assembly for use in a photographic printer includes a bottom clamping surface, a pivot arm, a top clamping plate fixedly attached to the pivot arm, a solenoid upwardly engaging the pivot arm and a bias spring for upwardly engaging the pivot arm. The bottom and top clamping plates have apertures that allow light to be transmitted through the photographic film being held between the top clamping plate and the bottom clamping surface for exposing photosensitive print film. The solenoid engages the pivot arm on the side opposite of the pivot point from the top clamping plate. The solenoid pivots the top clamping plate about the pivot point to a clamping position whereby the top and bottom clamping plates are clamped together to hold the film negative. The bias spring pivots the top clamping plate upwardly from the clamping position to an open position when the solenoid is deenergized.
REFERENCES:
patent: 3073214 (1963-01-01), Haviland
patent: 4161365 (1979-07-01), Anderson et al.
patent: 4168114 (1979-09-01), Lopata
Pako Corporation
Wintercorn Richard A.
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