Electrostatic voltmeter (ESV) zero offset adjustment

Details Electrostatic voltmeter (ESV) zero offset adjustment Electrostatic voltmeter (ESV) zero offset adjustment

1991-09-05

1992-06-02

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355328, G03G 2100

Patent

active

051191318

ABSTRACT:
In a single pass, tri-level imaging apparatus, erroneous voltage readings of an Electrostatic Voltmeter (ESV) which has become contaminated by charged particles (i.e. toner) are negated by using two ESVs.
During each cycle up following a normal cycle down, a pair of Electrostatic Voltmeters (ESVs) are utilized to measure the voltage level on a portion of relatively uncharged portion of a photoreceptor (P/R). Using one of the ESVs, which is less prone to contamination, as a reference, the zero offset of the other is adjusted to achieve the same residual P/R voltage reading. The difference in the readings which is due to toner contamination is the zero offset between the two ESVs. The offset is used to adjust all subsequent voltage readings of the ESV until a new offset is measured.

REFERENCES:
patent: 3013890 (1961-12-01), Bixby
patent: 3045644 (1962-07-01), Schwertz
patent: 3816115 (1974-06-01), Gundlach et al.
patent: 3832170 (1974-08-01), Nagamatsu et al.
patent: 4068938 (1978-01-01), Robertson
patent: 4078929 (1978-03-01), Gundlach
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4346982 (1982-08-01), Nakajima et al.
patent: 4403848 (1983-09-01), Snelling
patent: 4562130 (1985-12-01), Oka
patent: 4588667 (1986-05-01), Jones et al.
patent: 4654284 (1987-03-01), Yu et al.
patent: 4731634 (1988-03-01), Stark
patent: 4761672 (1988-08-01), Parker et al.
patent: 4771314 (1988-09-01), Parker et al.
patent: 4780385 (1988-10-01), Wieloch et al.
patent: 4810604 (1989-03-01), Schmidlin
patent: 4811046 (1989-03-01), May
patent: 4833504 (1989-05-01), Parker et al.
patent: 4847655 (1989-07-01), Parker et al.
patent: 4868600 (1989-09-01), Hays et al.
patent: 4868608 (1989-09-01), Allen, Jr. et al.
patent: 4868611 (1989-09-01), Germain
patent: 4901114 (1990-02-01), Parker et al.
patent: 4913348 (1990-04-01), Hays
patent: 4963935 (1990-10-01), Kawabuchi
patent: 4980725 (1990-12-01), Sumida
patent: 4984022 (1991-01-01), Matsushita
patent: 4990955 (1991-02-01), May et al.
patent: 4998139 (1991-03-01), May et al.
patent: 5010367 (1991-04-01), Hays
patent: 5010368 (1991-04-01), O'Brien
patent: 5019859 (1991-05-01), Nash
patent: 5021838 (1991-06-01), Parker et al.
patent: 5032872 (1991-07-01), Folkins et al.
patent: 5045893 (1991-09-01), Tabb
patent: 5049949 (1991-09-01), Parker

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