Browse Prior Art Database

Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal


The depicted composing machine is capable of masking selected portions of an original document and reproducing the unmasked portions to form a composite copy from the unmasked portions of a plurality of original documents. The composing machine employs a transparent platen 10 supporting an original docu-ment 12, Lamps 14 direct light rays onto original document 12. These light rays are reflected by mirrors 16 through lens 18. The resultant light image is then reflected by mirror 20 in an upwardly direction onto viewing screen 22, A variable size and shape masking mechanism is positioned closely adja-cent to platen 10. The masking mechanism permits the operator to omit selected portions from original document 12. Only the unmasked portions of the original document will be displayed on screen 22. Screen 22 retains a light image thereof for a pre-selected period of time. This permits successive original documents to be masked and projected onto screen 22 so that the unmasked portions thereof are in registration with one