Freeze dryer apparatus having an interim condensing system and u

Details Freeze dryer apparatus having an interim condensing system and u Freeze dryer apparatus having an interim condensing system and u

1991-07-31

1993-04-06

Hepperle, Stephen M.

Drying and gas or vapor contact with solids

Apparatus

Vacuum

34 5, 62268, F26B 506

Patent

active

051991870

ABSTRACT:
The subject invention provides a freeze dryer apparatus having an interim condensing system, preferably a refrigeratable condensing surface. The interim condensing system condenses vapors within the product chamber of the freeze dryer apparatus when the main condenser coil, which normally condenses vapors within the product chamber, needs to be defrosted. The refrigeratable condensing surface is preferably mounted inside the product chamber.

REFERENCES:
patent: 2561305 (1951-07-01), Limpert et al.
patent: 3178829 (1965-04-01), Cox
patent: 3271874 (1966-09-01), Oppenheimer
patent: 3382586 (1968-05-01), Lorentzen
patent: 3516170 (1970-06-01), Liobis et al.
patent: 4191024 (1980-03-01), Machida
patent: 4749394 (1988-06-01), Ehrsam
patent: 4751828 (1988-06-01), Coulter et al.
patent: 4823478 (1989-04-01), Thompson, Sr.
patent: 4949473 (1990-08-01), Steinkamp
Northstar Product Literature, prior to Jul. 31, 1991.

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