Electrophotography – Control of electrophotography process – Control of developing
Patent
1998-05-06
1999-08-03
Pendegrass, Joan
Electrophotography
Control of electrophotography process
Control of developing
399 65, G03G 1510, G01N 2147
Patent
active
059336854
ABSTRACT:
A developer concentration detection apparatus is provided, which includes a base member in which a developer accommodation space is formed, an electrode plate member installed in the base member so that a toner included in a developer in the developer accommodation space is electrically charged, a hollow transparent conductive tube which is rotatably supported in the state where at least part thereof is submerged in the developer in the developer accommodation space and the surface thereof can be charged, a light emitting element installed in the transparent conductive tube, and a light receiving element installed spaced from the surface of the transparent conductive tube, for detecting light generated from the light emitting element. The developer concentration detection apparatus can detect measurement of the developer concentration, thereby providing the result of assuring an optimal printing quality. Also, reliability and accuracy of the measurement is guaranteed since the developer concentration is measured by directly detecting the amount of the particles of the toner included in the developer.
REFERENCES:
patent: 4204766 (1980-05-01), Harada
patent: 5724629 (1998-03-01), Iino et al.
Pendegrass Joan
Samsung Electronics Co,. Ltd.
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