Liquid developing material replenishment control system

Details Liquid developing material replenishment control system Liquid developing material replenishment control system

1995-11-01

1999-07-13

Le, N.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

399 58, B41J 2385, G03G 1304

Patent

active

059233567

ABSTRACT:
An apparatus for developing an electrostatic latent image in a liquid developing material-based electrostatographic printing machine including a control system for controlling an amount of marking particles, carrier liquid and/or charge director added to a supply of liquid developing material utilized for developing a latent electrostatic image such that the concentration of marking particles and or charge director can be maintained at an optimal value. The amount of marking particles, carrier liquid and/or charge director in a supply of liquid developing material is maintained at a predetermined optimal value in response to the amount of marking particles and/or charge director depleted from the supply of liquid developing material with each development cycle. A supply reservoir is maintained with a substantially constant amount of liquid carrier to which is added marking particles and/or charge director to provide an operative solution of liquid developing material. For each development cycle, the amount of marking particles and/or charge director depleted from the supply of liquid developing material is determined as a function of the number of picture elements or pixels making up the image being developed. Marking particles and/or charge director concentrate are added to the supply reservoir to maintain the amount of marking particles and/or charge director in the operative solution of liquid developing material at a predetermined value by effectively supplying the marking particles and/or charge director lost by the transport of liquid developing material to the copy substrate.

REFERENCES:
patent: 4860924 (1989-08-01), Simms et al.
patent: 4980259 (1990-12-01), Landa et al.
patent: 5202769 (1993-04-01), Suzuki
patent: 5204698 (1993-04-01), LeSueur et al.
patent: 5231454 (1993-07-01), Landa
patent: 5349377 (1994-09-01), Gilliland et al.

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