Electrophotographic printer sensing ambient conditions without s

Details Electrophotographic printer sensing ambient conditions without s Electrophotographic printer sensing ambient conditions without s

1998-04-16

1999-03-23

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Of plural processes

399 43, 399 45, 399 50, 399 55, 399 66, 399 69, G03G 1500

Patent

active

058872205

ABSTRACT:
When an electrophotographic printer is manufactured, the initial electrical resistance of its transfer roller is measured and a corresponding value is stored in a memory device in the printer. During operation, the printer's control program estimates the resistance of the transfer roller from the stored value, taking aging into account, then measures the actual resistance of the transfer roller, and infers ambient conditions from the difference between the estimated and actual resistance values. The electrophotographic printer is controlled according to the inferred ambient conditions.

REFERENCES:
patent: 4857959 (1989-08-01), Shimbo et al.
patent: 5151736 (1992-09-01), Ohzeki et al.
patent: 5621504 (1997-04-01), Wakamatsu et al.
patent: 5682575 (1997-10-01), Komori
patent: 5809367 (1998-09-01), Yoo et al.

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