Method and apparatus for an improved shelf and tray assembly for

Details Method and apparatus for an improved shelf and tray assembly for Method and apparatus for an improved shelf and tray assembly for

1976-12-06

1978-08-29

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

Removable shelf or tray type

34 92, 34237, 34238, F26B 1118, F26B 2518

Patent

active

041093968

ABSTRACT:
A method and apparatus for effecting an efficient heat transfer between a shelf and a tray of a freeze drying apparatus. A unique method comprising the steps of placing two halves of the shelf on a bowed jig and welding together forms a hollow shelf having a substantially flat heat transfer surface on which a tray containing materials to be freeze dried may be placed. Throughout the shelf interior circulates a heat transfer fluid. The tray and the freeze drying chamber have mating hold-down rails which bias the tray against the shelf surface to effect superior heat transfer.

REFERENCES:
patent: 298916 (1884-05-01), Travis
patent: 794564 (1905-07-01), Stiff
patent: 1267144 (1918-05-01), Taylor
patent: 1287145 (1910-12-01), Vernon
patent: 3289314 (1966-12-01), Porta
patent: 3488860 (1970-01-01), Bender et al.

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