Interactivity sensor for electrophotographic printing

Details Interactivity sensor for electrophotographic printing Interactivity sensor for electrophotographic printing

1998-01-08

1999-08-03

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of developing

399 55, 399290, 399291, G03G 1508

Patent

active

059336846

ABSTRACT:
An apparatus in which the developability and interactivity of electrostatically charged particles in a mixture of particulate material is measured. The sensor apparatus includes a transparent member positioned closely adjacent to a developer roller of an electrophotographic printing machine. Electrostatically charged particles are attracted from the particulate mixture being transported by the developer roller to the member. A beam of energy is transmitted through the member. The intensity of the internally reflected beam is detected and a signal generated indicative of the quantity of charged particles adhering to the member. A cleaning field bias is applied, to determine if a signal indicative of the charge particles being removed (interactivity) from the member is generated.

REFERENCES:
patent: 4431300 (1984-02-01), Snelling
patent: 5404208 (1995-04-01), Edmunds

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