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Ascertaining imaging cycle life of a photoreceptor

  • US 5,175,503 A
  • Filed: 12/28/1990
  • Issued: 12/29/1992
  • Est. Priority Date: 12/28/1990
  • Status: Expired due to Term
First Claim
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1. A process for ascertaining the projected imaging cycle life of an electrophotographic imaging member comprising the steps of(a) providing at least one electrophotographic imaging member having a cycling life of a known number of imaging cycles, said imaging member comprising an electrically conductive layer and at least one photoconductive layer,(b) repeatedly subjecting said at least one electrophotographic imaging member to cycles comprising electrostatic charging and light discharging steps,(c) measuring dark decay of said at least one photoconductive layer during cycling until the amount of dark decay reaches a crest value,(d) establishing with said crest value a reference datum for dark decay crest value versus imaging cycles,(e) repeatedly subjecting a virgin electrophotographic imaging member to aforesaid cycles comprising electrostatic charging and light discharging steps until the amount of dark decay reaches a crest value which remains substantially constant during further cycling;

  • and(f) comparing said dark decay crest value of said virgin electrophotographic imaging member with said reference datum to ascertain the projected cycling life of said virgin electrophotographic imaging member.

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