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US 5,387,499 AGranted
Method and apparatus for photographic processing
AssigneeEastman Kodak Company
InventorsAnthony Earle, James I. Dunlop, Edward C. T. S. Glover, Peter D. Marsden, Roger Baretll
Life of this patent
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Abstract
A method of processing an imagewise exposed photographic material in a processing solution which is unstable to the extent that it deteriorates without external reaction in which the photographic material is passed through a tank containing the solution characterized in that the solution is circulated through the tank at a rate of from 0.1 to 10 tank volumes per minute.
Claims20
A method of processing an imagewise exposed photographic material in a processing solution comprising the steps of:
- circulating a processing solution through a tank at a rate of 1 to 5 tank volumes per minute, wherein said processing solution comprises a color developing agent and a reducing agent and is unstable to the extent that said processing solution deteriorates without external reaction;
- converting said exposed photographic material through said tank, whereby said photographic material is contacted with said processing solution;
- and
- replenishing said processing solution.
1 more element
A processing tank comprising:
- a U-shaped container having a generally rectangular cross-section with longer sides having inner faces, wherein spacing between said longer sides of said container is less than about 11 mm;
- an inlet means;
- an outlet means;
- and
- a means for circulating liquid through said container at a rate of 1 to 5 tank volumes per minute.
2 more elements
Dependencies are inferred from the claim text.