Rotary-disc test printing easel

Details Rotary-disc test printing easel Rotary-disc test printing easel

1983-03-11

1986-08-05

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 74, G03B 2758

Patent

active

046039678

ABSTRACT:
A lighttight paper holding easel device allowing an economic size cutting of photographic color paper to be rotatively test exposed to the light of a conventional color enlarger in a multiple number of steps in a manner which cover protects the paper as the device is advanced between steps of exposing sequential areas of the proof and thereby allows the enlarger operator to switch on a standard roomlight without fear of inadvertantly exposing the light sensitive paper. A means by which the device is equipped with an optional electrical circuit, fitted with a lever operated micro switch, which is operated by the mechanical means of the device to switch the roomlight on and off automatically as the device is advanced between steps of exposing sequential areas of the proof. A removable lighttight paper holder platen having alternate pairs of rotatable disc sets releasably attached to revolve around a centrally placed vertical post, each disc of a pair having a proportionately sized window aperature cut out of its otherwise opaque surface to allow a single sheet of photographic paper to be test exposed in a specific number of equally divided segments. A lighttight papersafe-easel base member of the device in which to store photographic paper and on which to expose single test exposure prints or repeat enlargements.

REFERENCES:
patent: 3588248 (1971-06-01), Freund et al.
patent: 3689149 (1972-09-01), Livingood
patent: 3829211 (1974-08-01), Mitchell
patent: 4166701 (1979-09-01), Miller
patent: 4440490 (1984-04-01), Moore et al.
patent: 4452529 (1984-06-01), Olsson

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