Solute concentration control method and apparatus

Details Solute concentration control method and apparatus Solute concentration control method and apparatus

1998-10-07

1999-11-23

Smith, Matthew S.

Electrophotography

Control of electrophotography process

Control of developing

399 58, 399 62, 399 64, 399 65, 118691, G03G 1510

Patent

active

059915595

ABSTRACT:
A control apparatus for controlling a concentration of a solute having a predetermined optical absorption characteristic is disclosed. A cell holding member has a plurality of cells formed therein, one of which is placed at a predetermined detection position so that the solution flows through that cell. A concentration of the solute is detected based on the intensity of light that has passed through the cell placed at the predetermined detection position. A cell changer replaces the cell with another cell by moving the cell holding member when a detected concentration has not changed as expected.

REFERENCES:
patent: 3699992 (1972-10-01), Knechtel et al.
patent: 4222497 (1980-09-01), Lloyd et al.
patent: 4671309 (1987-06-01), Iemura et al.
patent: 4943735 (1990-07-01), Nishikawa
patent: 5485276 (1996-01-01), Bien et al.

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