Drying and gas or vapor contact with solids – Process – Gas or vapor pressure varies during treatment
Reexamination Certificate
2008-05-13
2008-05-13
Bianco, Patricia (Department: 3772)
Drying and gas or vapor contact with solids
Process
Gas or vapor pressure varies during treatment
C034S284000, C034S287000, C034S402000
Reexamination Certificate
active
07370436
ABSTRACT:
An apparatus capable of performing consecutively, independently and/or simultaneously the processes of quick freezing and/or freeze drying of produce. The apparatus is characterized by a central vacuum system operating over one or more independent vacuum chambers (10,11,12,13,14); said vacuum system being composed of at least two vacuum subsystems (40,50), connected to the chambers by means of independent manifolds (400,500). One vacuum subsystem (40) evacuates air from any of the chambers from atmospheric pressure to a pressure slightly above that of the triple point of water, and the other vacuum subsystem (50) further quickly evacuates any of the chambers from said pressure slightly above the triple point of water to the pressure corresponding to the thermodynamic equilibrium of ice and water vapor at a desired freezing temperature, in a desired freezing time.
REFERENCES:
patent: 626579 (1899-06-01), Viele
patent: 3574951 (1971-04-01), Oetjen et al.
patent: 3820250 (1974-06-01), Mishkin et al.
patent: 4612200 (1986-09-01), Sato
patent: 5138520 (1992-08-01), McMillan et al.
Auer Ricardo Francisco
Masuda Mitsuru
McGee Michael Louis
Roberts Julian Diego
Bianco Patricia
Lucas & Mercanti LLP
Nguyen Camtu
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