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Sequencing means for photocopying processes

  • US 4,712,907 A
  • Filed: 11/01/1985
  • Issued: 12/15/1987
  • Est. Priority Date: 11/01/1985
  • Status: Expired due to Term
First Claim
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1. An electrophotographic printing machine for reproducing an original document with a copy thereof having additional indicia thereon, including:

  • a photoconductive member;

    means for charging at least a portion of said photoconductive member to a substantially uniform potential;

    means for illuminating selectively the charged portion of said photoconductive to discharge selectively the charged portion of said photoconductive member to record an electrostatic latent image on said photoconductive member corresponding substantially to the original document being reproduced;

    means for masking a region of the charged portion of said photoconductive member discharged normally by said illuminating means to prevent the discharge thereof by said illuminating means; and

    means for discharging selectively the masked region of the charged portion of said photoconductive member to record an electrostatic latent image thereon corresponding to the additional indicia.

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