Radiation imagery chemistry: process – composition – or product th – Post imaging processing
Patent
1994-05-06
1996-01-02
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
430398, 430400, 204109, 204229, G03C 538, G03C 5395, C25C 120
Patent
active
054807697
ABSTRACT:
The invention relates to a method and apparatus for controlling electrolytic silver recovery for two film processing machines which enables the fixing baths to be connected with a silver recovery unit according to their level of silver concentration. According to the invention, the silver concentration in a fixing bath having a liquid connection with the silver recovery unit and in an unconnected fixing bath is continually calculated by electronic means and a control signal is generated when the difference in silver concentration between the connected and the unconnected fixing baths reaches a pre-definable level, said control signal causing actuators to connect the silver recovery unit with the fixing bath having the higher concentration of silver. When the silver concentration reaches a pre-definable level an electrolysing current in the silver recovery unit is switched on and remains switched on until the silver concentration falls below the pre-defined level.
REFERENCES:
patent: 4362608 (1982-12-01), Biles et al.
Brochure of the Company H. Stamm KG/1991.
Huettemeister Franz
Ueffinger Gerhard
Bowers Jr. Charles L.
Eastman Kodak Company
Everett John R.
Huff Mark F.
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