Processing cabinet with sub-door access

Details Processing cabinet with sub-door access Processing cabinet with sub-door access

1985-06-10

1986-11-25

Lyddane, William E.

Supports: cabinet structure

With auxiliary closure in a closure

49360, 312312, A47B 5706

Patent

active

046245120

ABSTRACT:
The main door of a freeze dryer is provided with a sub-opening arranged to register with the space between adjacent vertically adjustable freeze dryer shelves, for infeeding and outfeeding trays or other containers of material to and from each shelf. An entry chamber surrounds the sub-opening and has a sloping outer face provided with a resilient seal arranged to form a pressure tight seal with a sub-door movable by a fluid pressure piston-cylinder unit between positions opening and closing the entry passageway of the entry chamber. Photoelectric safety mechanism is associated with the entry passageway to prevent closing of the sub-door when any object is in the entry passageway.

REFERENCES:
patent: 2136558 (1938-11-01), Marshell
patent: 4345802 (1982-08-01), Sorensen
patent: 4449305 (1984-05-01), Baron et al.
patent: 4503784 (1985-03-01), Turecek

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