Drying and gas or vapor contact with solids – Apparatus – Vacuum
Patent
1977-09-12
1979-03-06
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
Vacuum
53106, F26B 1330
Patent
active
041423038
ABSTRACT:
An improved mechanical stoppering apparatus is provided by the present invention for use with a chamber freeze dryer in which at least two shelves supporting a plurality of receptacles containing material to be freeze dried are adjustably suspended from a fixed plate one above the other for substantially isolating the shelves from the walls of the vacuum chamber of the freeze dryer to provide an even rate of sublimation along the entire surface area of the shelves. A drive means is provided for raising the lower shelf individually until the receptacles it supports contact the bottom of the upper shelf, whereupon both shelves move upwardly in tandem toward the fixed plate, the receptacles on the upper shelf being stoppered against the fixed plate and the receptacles on the lower shelf being stoppered against the bottom of the upper plate.
REFERENCES:
patent: 2013548 (1935-09-01), Barnby
patent: 3022619 (1962-02-01), Strong et al.
patent: 3448556 (1969-06-01), Taggart
patent: 3451189 (1969-06-01), Taggart
patent: 3537233 (1970-11-01), Costello et al.
patent: 3795986 (1974-03-01), Sutherland et al.
Camby John J.
FTS Systems Inc.
Kautz Thomas L.
Wagner Robert E.
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