Photography – Fluid-treating apparatus – Having fluid filter
Patent
1999-02-11
2000-09-19
Mathews, Alan A.
Photography
Fluid-treating apparatus
Having fluid filter
396626, 210207, 210719, 266170, C02F 166, G03D 302
Patent
active
061201944
ABSTRACT:
Spent color photography liquids comprising alkaline developer liquid and fixer liquid loaded with iron ions generate a dischargeable effluent, in which clogging of drains and conduits with precipitated iron oxides is minimized or avoided; the liquids are fed through separate feed ports into a vessel to form a liquid bath, the feed ports being isolated from each other and from the liquid bath; liquid effluent is pumped from the bath to form an effluent flow; preferably the pumping employs a suction generated by flow of a carrier liquid such as water through a venturi passage, whereby the liquid effluent is entrained in the flowing water and discharged under pressure, the precipitated iron oxides being retained in a dispersed non-clogging state.
REFERENCES:
patent: 4608177 (1986-08-01), Woog
patent: 5229009 (1993-07-01), Woog
patent: 5298170 (1994-03-01), Woog
patent: 5317360 (1994-05-01), Woog
patent: 5792347 (1998-08-01), Bathurst et al.
Brunelle Denis
Gravel Bernard
Ren Jian Min
Riviere John
Mathews Alan A.
Metafix Inc.
Murphy Kevin P.
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