Method and apparatus for determining toner development rate

Details Method and apparatus for determining toner development rate Method and apparatus for determining toner development rate

1992-06-12

1994-02-08

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118653, 118690, 355208, G03G 2100

Patent

active

052852431

ABSTRACT:
A method and apparatus for determining the rate of development characteristic of electroscopic toner particles of the type used in electrostatographic recording to develop electrostatic images. The apparatus has a biased electrode for attracting toner particles and a microprocessor-based logic and control unit for sampling the mass of toner particles attracted to the electrode at preselected times during the accumulation of toner on the biased electrode. This development rate parameter is used by the logic and control unit to control process parameters (e.g. primary charging and exposure levels, development electrode bias, toner concentration) which affect image quality.

REFERENCES:
patent: 4314242 (1982-02-01), Kuru et al.
patent: 4987453 (1991-01-01), Laukaitis
patent: 5006897 (1991-04-01), Rimai et al.
patent: 5117192 (1992-05-01), Hurd

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