Primary charge roller evaluator

Details Primary charge roller evaluator Primary charge roller evaluator

1994-09-20

1995-12-12

Wieder, Kenneth A.

Electricity: measuring and testing

For insulation fault of noncircuit elements

324511, 324515, 324551, G01R 3112

Patent

active

054753139

ABSTRACT:
The primary charge roller evaluator is a device to determine an accurate measurement of conductivity or leakage current of primary charge roller, from its steel shaft to outer coating. This measurement is based on the impedance of the roller, that is the in-phase resistance and the capacitive reactance of the roller. This measurement allows the user to evaluate the quality of the primary charge roller. This evaluation is then used to predict the performance of primary charge roller. Accurate conductivity or leakage currents are determined by totally enclosing the primary charge roller in conductive holders and applying a pre-measured pressure on roller for maximum contact. Humidity compensator adjusts for changes in humidity and has non-linear scale to adjust for patented characteristics of rollers.

REFERENCES:
patent: 2812491 (1957-11-01), Figlio
patent: 3093793 (1963-06-01), Hicken
patent: 3359487 (1967-12-01), Nathan
patent: 3714455 (1973-01-01), Chepelev
patent: 3753091 (1973-08-01), Daspit
patent: 3798540 (1974-03-01), Darden
patent: 4323972 (1982-04-01), Winter
patent: 4336494 (1982-06-01), Shindo
patent: 5126913 (1992-06-01), Araya
Quality Engineering Associates: CRT-2000 Charge Roller Yest System--(brochure)--1993 (5 pages).

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