Vacuum-drying method and apparatus
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United States of America Patent
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-
Sep 7, 1982
Grant Date -
N/A
app pub date -
Apr 3, 1980
filing date -
Apr 7, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of and an apparatus for the drying of articles, especially foodsfs, biological materials and other substances susceptible to cell damage with overheating, wherein the material is spread in a high-vacuum vessel directly adjacent a cooled condenser and is subjected to a vacuum by a pump capable of developing pressures as low as about 0.1 mbar. The chamber is evacuated until there is a noticeable formation of the condenser whereupon the connection between the pump and the chamber is closed and the product is heated to evaporate liquids but below a predetermined temperature (say a maximum of 50.degree. C.) while the condensate resulting from the evaporation is collected directly below the product and is discharged.
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