Apparatus for cryogenic freezing of fluid filled pouches

Refrigeration – Means producing shaped or modified congealed product – With article press means

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206451, F25C 514

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active

040903745

ABSTRACT:
Viable fluids such as blood components are rapidly frozen in plastic or the like pouches for transportation and/or storage by placing a flat pouch slack filled with fluid between two substantially planar parallel restraining surfaces such as metal plates of greater perimeter than the flattened slack filled pouch which are rigid enough to prevent sagging of the pouch when it is vertically disposed and flexible enough to accommodate expansion of the pouch flat sides during the freezing operation. The restraining surfaces are retained against separation by retaining means applied against at least a portion of the outer surfaces of each pouch restraining means and the entire assembly is immersed in a cryogenic medium to rapidly freeze the fluid.

REFERENCES:
patent: 2260450 (1941-10-01), Guinane
patent: 2964920 (1960-12-01), Staebler
patent: 2968568 (1961-01-01), Preuss
patent: 3452469 (1969-07-01), White
patent: 3576650 (1971-04-01), Underwood et al.
patent: 3612233 (1971-10-01), Nagpal et al.
patent: 3683635 (1972-08-01), Campanelli
Modern Problems of Blood Preservation (Spielman et al., eds.), Stuttgard, G. F. Verlag, 1970, pp. 168-175: "Low Temperature Preservation of Red Cells Using Fast Freezing Method & Low Glycerol in Plastic Containers": Pert et al.
Modern Problems of Blood Preservation (Spielman et al., eds.), Stuttgard, G. F. Verlag, 1970, pp. 157-160: "A Plastic Bag System for Freezing, Thawing & Washing of Red Cells": Akerblom et al.
Proceedings 10th Congress International Society Blood Transfusion, Stockholm, 1964, pp. 674-682, (1965), "Low Temperature Preservation of Human Erythrocytes": Pert et al.

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