Browse Prior Art Database

Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 461K

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

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ProposedThomas P. Agliata Classification

U.S. Cl. 96/1
mt. Cl. G03g





Volume 2 Number 6 November/December 1977 5

[This page contains 1 picture or other non-text object]

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another forming a composite original document. After the
composite original document is formed, laser 24 is activated.
Laser 24 simultaneously reads the unmasked portion of the
original document and writes this information on the plane of
viewing screen 22 which contains a recording sheet. The beam
from laser 24 is projected onto beam splitter 26. Beam

splitter 26 forms two beams, a read beam and a write beam.
Mirror 27 reflects the read beam onto scanner 28, and beam
splitter 26 reflects the write beam onto scanner 28, Read
beam 32 is reflected by mirror 41 onto the surface of original
document 12. Original document 12 moves in the direction of
arrow 34 so that the entire original document is scanned by
read beam 32, Recording member 30 is driven in synchronism
with the movement of original document 12 so that the write
beam projected thereon records the information contained
within the masked portions of the original document 12. Write
beam 36 is modulated by modulator 38. This is achieved by

reflection detectors 40. Reflection detectors 40 measure the
intensity of the beam reflected from original document 12.
The detectors develop a signal which controls modulator 38.
Modulator 38 is biased such that when detectors 40 sense back-
ground, write beam 36 is...