Photocopying – Projection printing and copying cameras – Copying both sides of original
Patent
1978-07-27
1980-06-17
Griffin, Donald A.
Photocopying
Projection printing and copying cameras
Copying both sides of original
355 76, G03B 2732, G03B 2762
Patent
active
042081238
ABSTRACT:
Photo Graphic-Plane is a system that will facilitate the photographic process. It is a pneumatic device designed to support books and volumes at a level plane with minimum curvature of the surface while being microfilmed or photo-copied. This objective is accomplished thru air displacement from one collapsible and inflatable container under one cover of the volume thru a by-pass tube and control valve into another collapsible and inflatable container under the other cover of the volume. The result is an automatic leveling effect as pages are turned, causing an inverse shift of weight which in turn causes air displacement and the leveling process. A transparent cover is provided for the surface being photographed to enhance the leveling of the volume while reducing the surface curvature to near zero. The transparent cover is hinged to a base thru a novel coupling of fabric or magnetic force which permits flexibility in adjustment or removal and especially to allow the transparent cover to be elevated or lowered at its level plane thereby accommodating thick or thin volumes. The transparent cover is raised and lowered on the coupling which also functions as a hinge to permit pages to be turned and photographed.
REFERENCES:
patent: 978719 (1910-12-01), Ellis
patent: 1780701 (1930-11-01), Crane
patent: 2134704 (1938-11-01), Cornell
patent: 2184012 (1939-12-01), Hopkins
patent: 2652757 (1953-09-01), Robbins
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