Reconditioning primary charge rollers for electrostatographic im

Details Reconditioning primary charge rollers for electrostatographic im Reconditioning primary charge rollers for electrostatographic im

1996-12-20

1998-10-20

Beck, Shrive

Roll or roller

Concentric layered annulus

Specific composition

492 49, 492 56, 298951, 2989532, 428367, 428906, B25F 502

Patent

active

058239294

ABSTRACT:
Used, spent or physically degraded primary charge rollers (PCR's) may be rejuvenated to an extent that is operationally comparable to (or exceeds) the print quality and service life of an OEM-supplied PCR. The used PCR is treated so as to apply an overcoating of a dispersion which includes an electrically conductive particulate material, such as graphite or carbon black, and a polymeric binder (e.g., polyurethane latex). The electrically conductive material imparts the necessary electrical properties to the PCR for purposes of "rejuvenation", while the presence of the polymeric binder serves to impart long-term service life to the PCR and also permits the use of less electrically conductive material.

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