Process and apparatus for freeze-drying comprising means forming

Details Process and apparatus for freeze-drying comprising means forming Process and apparatus for freeze-drying comprising means forming

1988-11-16

1990-09-04

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Vacuum

34 5, F26B 506

Patent

active

049532995

ABSTRACT:
This invention relates to a process and apparatus for freeze-drying, said apparatus comprising freeze-drying shelves disposed inside a freeze-drying enclosure, on which may be placed products or solutions to be freeze-dried, which may be contained in open recipients, as well as cooling and/or heating means associated with and preferably incorporated in said shelves, wherein means forming a thermal shield are disposed between said freeze-drying shelves, thus making it possible to slow down the heat exchanges between the surface of the product to be freeze-dried and the heating and/or cooling elements associated with the shelves. More homogeneous freeze-dried products are obtained in this way.

REFERENCES:
patent: 2602825 (1952-07-01), Flosdorf
patent: 3118742 (1964-01-01), Dalgleish
patent: 3135589 (1964-06-01), Stokes
patent: 4501719 (1989-02-01), Williams

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