Method for replenishing developer of automatic developing...

Details Method for replenishing developer of automatic developing... Method for replenishing developer of automatic developing...

2005-03-15

2005-03-15

Rutledge, D. (Department: 2851)

Photography

Fluid-treating apparatus

Heating, cooling, or temperature detecting

C396S578000, C396S626000, C430S030000

Reexamination Certificate

active

06866432

ABSTRACT:
In an electric conductivity-based replenishing system, a developer replenishing method for a photosensitive lithographic printing plate is provided which is capable of minimizing the fluctuations in sensitivity of a developer with respect to the changes in development treatment conditions. An electric conductivity value of the developer is measured in a predetermined given cycle, when the measured electric conductivity value of the developer is lower than the target electric conductivity value, the developer is replenished with a predetermined amount of a developer replenisher, the time interval between the previous supply of the developer replenisher and the present supply of the developer replenisher is measured, a target electric conductivity arithmetic expression is selected based on the measured replenishment time interval and the replenishment time interval threshold value. Using the selected target electric conductivity value arithmetic expression and the measured replenishment time interval, the target electric conductivity value is updated.

REFERENCES:
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patent: 5701542 (1997-12-01), Sasayama
patent: 5716743 (1998-02-01), Stein et al.
patent: 6364544 (2002-04-01), Sasayama et al.
patent: 64-21451 (1989-01-01), None
patent: 9-96910 (1997-04-01), None

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