Device for correcting positive film for photocomposition
AssigneeH. Berthold AG
InventorFranz Adolf Wingerter
Life of this patent
Estimating the term…
Abstract
A device for correcting positive film for photocomposition using a photographic method which comprises first projecting an original film onto a final film with the defective area rendered unexposed, then projecting the correct replacement material onto the unexposed portion of the final film, both projection methods using an optical system with a movable mirror.
Claims10
A method for correcting positive film for photocomposition using an original defective film, a correction film containing a desired replacement material, a final film, and an optical system of mirrors used to correctly align and project said replacement material, said method comprising:
- covering a defective area of said original film with a colored shading;
- projecting said original film onto said final film by way of said system of mirrors, said shading on said original film causing an unexposed area on said final film;
- placing said correction film in the same spot from which said original film was projected onto said final film;
- positioning original film in a focusing plane which lies in a fixed position respective to said final film;
- moving one of said mirrors in said optical system into a predetermined position which permits projecting of said correction film onto said original film which is lying in said focusing plane;
- delineating said replacement material on said correction film by a manipulation of said correction film, said manipulation additionally capable of aligning said replacement material with said colored shading on said original film which is lying in said focusing plane;
- and
- removing one of said mirrors so that said replacement material, delineated and aligned, can be directly exposed to said final film, and because of previous alignment of said replacement material with said colored shading, said replacement material will be exposed to said unexposed area on said final film.
A device for correcting positive film for photocomposition comprising:
- a housing, said housing containing means for holding an original film carrying a red-shaded area to delineate a defective area;
- means for holding a final film in a recording plane;
- means for manipulating a correction film to delineate a desired replacement character or characters to take the place of said red-shaded area in said final film;
- and
- an optical system comprising two mirrors, a first convex lens mirror and a second movable mirror, a single light source, an image plane where said original film and said correction film are alternately located, a focusing plane in which said original film is selectively located, and said recording plane, said optical system designed to project said desired replacement characters onto said final film by successive projections of first said original film and then said correction film.
Dependencies are inferred from the claim text.