Method and apparatus for determining electrical charge character

Details Method and apparatus for determining electrical charge character Method and apparatus for determining electrical charge character

1990-09-21

1993-11-30

Harvey, Jack B.

Electricity: measuring and testing

A material property using electrostatic phenomenon

355246, G03G 2100, G01N 2760

Patent

active

052669009

ABSTRACT:
The electrostatic quality of toner material is measured by introducing the toner material into a measuring cell so that it flows through an opening in the measuring cell into a receiving chamber that is substantially free of gas flows and collects on a charged electrode disposed within the receiving chamber. The quantity of toner material collected on the electrode is utilized as an index of the quality of the toner material with respect to its electrostatic charge capability. In addition, the dispersal profile of the toner material collected on the electrode may be utilized for analytic purposes.

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patent: 3779204 (1973-12-01), Altmann
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patent: 4375673 (1983-03-01), Lewis et al.
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R. H. Epping et al., "Standardized Measurements Methods for Analyzing Electrostatically Charged Toners", SPIE, vol. 1252, pp. 123-131, Hard Copy and Printing Technologies (1990).
R. H. Epping et al., "Electrical Charge and Conductivity Measurement with Modern Mono-Component Developers", Electrophotography, vol. 27, No. 4, (1988).
R. H. Epping, "Lifetime Simulation and Charge Related Parameters of Two Component Developers", The Fourth International Congress on Advances in Non-Impact Printing Technologies, Mar. 20-25, 1988, pp. 102-112, New Orleans, Louisiana.

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