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US 4,006,018 AGranted
Copying in color
AssigneeMinnesota Mining and Manufacturing Company
InventorJoseph A. Wiese, Jr.
Life of this patent
Estimating the term…
Abstract
A process is described for performing color separations from a light-image of a colored original and for separately printing corresponding color separation images in registry onto a print sheet to provide a full color reproduction. The printing step is accomplished by thermographic dry image forming techniques.
Claims15
A method for making a multicolor print from a multicolor original comprising:
- a. holding said original and a print sheet in mutually optically fixed position;
- b. inserting a photosensitive intermediate into the optical path between said original and said print sheet;
- c. forming a pattern, corresponding to a first color separation of said original, on the photosensitive intermediate;
- d. utilizing said pattern on said intermediate to form a first colored pattern on said print sheet without changing the relative position of said intermediate with respect to said print sheet;
- e. repeating steps (b), (c) and (d) at least one more time to form at least a second colored pattern on said print sheet;
- whereby said colored patterns are in registry on said print sheet.
3 more elements
Dependencies are inferred from the claim text.