Method and appratus for reading and writing indicia such as bar

Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light

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Details

347129, 235462, 358298, B41J 247, G01D 1514, H04N 121, G06K 720

Patent

active

058254021

ABSTRACT:
A system for reading and writing indicia on a medium including a light source for producing a light beam; a reading element for directing the light beam at the medium so as to scan indicia disposed on a first portion of said medium, detecting at least a portion of the light of variable intensity reflected off the indicia, and generating an electrical signal indicative of the detected light intensity; and a writing element for directing the light beam at the medium in a pattern on a second portion of the medium so as record information on the medium. The light beam is preferably a laser beam generated by a semiconductor laser, and a mirror is used to scan the beam both for reading and writing.

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