Processing cabinet with sub-door access

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

A - Human Necessities

47

B

312/76

A47B 57/06 (2006.01) F26B 25/12 (2006.01)

Patent

CA 1245701

ABSTRACT OF THE DISCLOSURE 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.

489390

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