Modulated light printing

Claim 1

In copier/duplicator/printer apparatus for producing copies/duplicates/prints on a photosensitive medium, said copies/duplicates/prints normally comprising a centrally located user-originated image which is surrounded by an unused blank margin, said apparatus including document path means for transporting said copies/duplicates/prints through said apparatus, and a plurality of edge erase light emitting diodes disposed adjacent to and overlapping the document path means for erasing a selective width margin along the normally unused portion of each edge of said copies/duplicates/prints, the improvement comprising: means for storing apparatus-originated data to be printed in the normally unused margin of said copies/duplicates/prints; and modulator means responsive to said stored data for turning said edge erase light emitting diodes on and off to cause said data to be printed in the normally unused margin of said copies/duplicates/prints; said modulator means including: register means for controlling said edge erase light emitting diodes, said register means having a plurality of stages, each stage controlling a separate one of said light emitting diodes; and controller means responsive to said stored data for supplying a timed sequence of register settings to said register means to cause said stored data to be printed in the margin of said copies/duplicates/prints.