Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement
Patent
1990-08-13
1993-09-28
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Including control feature responsive to a test or measurement
430569, 423 42, 423 46, 423491, 23295R, 364150, 364164, 364165, 364500, 364502, 422110, 422111, G03C 1015
Patent
active
052485773
ABSTRACT:
A method and an apparatus for controlling reactant ion concentration within a precipitation vessel to optimize the reactions occurring therein is disclosed. In one important implementation, the reactant controlled comprises halide ion in a reactor during the precipitation and growth of silver halide grains. In this embodiment, the method includes measuring the amount of halide ion within the precipitation vessel; measuring the flow rates of the halide feed stream and the silver feed stream; storing the measured halide ion concentration and measured feed stream flow rates; computing an estimated smoothed halide ion concentration value as a function of the stored measured halide ion concentration and measured feed stream flow rates; and adjustably controlling the amount of halide ion added to the precipitation vessel as a function of this estimated halide ion concentration value. Preferably, N most recent measured halide ion concentrations and measured halide and silver feed stream flow rates are stored and used in determining the estimated smoothed halide ion concentration. Mathematical algorithms are derived herein to facilitate the computation of the estimated halide ion concentration and the necessary flow rate adjustment. Analogous apparatus is also provided herein.
REFERENCES:
patent: 3672900 (1972-06-01), Kurz
patent: 3737313 (1973-05-01), Rosecrants et al.
patent: 3782954 (1974-01-01), Porter et al.
patent: 3785777 (1974-01-01), Porter et al.
patent: 3821002 (1974-06-01), Culhane et al.
patent: 3897935 (1975-08-01), Forster et al.
patent: 3999048 (1976-12-01), Parthemore
patent: 4026668 (1977-05-01), Culhane et al.
patent: 4031912 (1977-06-01), Lu et al.
patent: 4171224 (1979-10-01), Verhille et al.
patent: 4591549 (1986-05-01), Matsuzaka et al.
patent: 4728603 (1988-03-01), Yagi et al.
patent: 4905160 (1990-02-01), Maurice et al.
patent: 4933870 (1990-06-01), Chang
James, T. H. "The Theory of the Photographic Process", 4th Edition pp. 5-6 (published 1977).
Dote Janis L.
Eastman Kodak Company
Legg L. George
McCamish Marion E.
LandOfFree
Reactant concentration control method and apparatus for precipit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reactant concentration control method and apparatus for precipit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reactant concentration control method and apparatus for precipit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2190225