Apparatus for forming silver halide grains

Details Apparatus for forming silver halide grains Apparatus for forming silver halide grains

1989-12-21

1993-05-25

Kunemund, Robert

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

422253, 23295R, 423491, 430569, C30B 714

Patent

active

052137724

ABSTRACT:
An apparatus for forming silver halide grains comprises a reaction vessel for causing the nucleus formation and the crystal growth of silver halide grains. The apparatus further includes: a mixer disposed outside of the reaction vessel and having a high-speed stirring blade; conduits for supplying an aqueous solution of a water-soluble silver salt, an aqueous solution of water-soluble halide, and an aqueous protective colloid solution to the mixer while controlling the rotational speed of the high-speed stirring blade to form fine, silver halide grains; and a conduit for connecting the mixer to the reaction vessel for immediately supplying the fine grains in the mixer to the reaction vessel.

REFERENCES:
patent: 3132143 (1964-05-01), Fogagnolo et al.
patent: 3607392 (1971-09-01), Lauer et al.
patent: 3650757 (1972-03-01), Irie et al.
patent: 3785777 (1974-01-01), Porter et al.
patent: 3845801 (1974-11-01), Kuchar
patent: 4157289 (1979-06-01), Ikenoue et al.
patent: 4159194 (1979-06-01), Steward
patent: 4879208 (1989-11-01), Urabe

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