Method and apparatus for admixing photographic processing compos

Details Method and apparatus for admixing photographic processing compos Method and apparatus for admixing photographic processing compos

1980-04-11

1981-11-24

McCarthy, Edward J.

Agitating

Having specified feed means

137896, 366336, B01F 1502

Patent

active

043021131

ABSTRACT:
A method and apparatus for admixing liquid with concentrated, shear-thinable stiff pastes of photographic processing compositions to form photographic processing solutions, in which the pastes are thinned by shear forces and contacted with the diluting liquid under turbulent mixing conditions to dissolve the concentrate in the liquid and thereby form the solution. The paste, which does not flow and resists deformation under conditions of low shear, is displaced through an orifice where conditions of high shear render it free flowing and form a stream. One or more liquid jets are directed at the stream with sufficient force to disperse the concentrate and bring about intimate contact between the liquid and the composition under turbulent mixing conditions. A static mixer then completes the dissolution of the chemicals in the liquid.

REFERENCES:
patent: 3147955 (1964-09-01), Harvey
patent: 3334657 (1967-08-01), Smith
patent: 3728129 (1973-04-01), Sargeant
patent: 3868967 (1975-03-01), Harding
patent: 3892389 (1973-07-01), Contastin
patent: 4093188 (1978-06-01), Horner

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