Chemical apparatus and process disinfecting – deodorizing – preser – Control element responsive to a sensed operating condition – Control element is fluid pressure sensitive
Patent
1979-11-21
1980-12-16
Richman, Barry
Chemical apparatus and process disinfecting, deodorizing, preser
Control element responsive to a sensed operating condition
Control element is fluid pressure sensitive
422 27, 422 33, 422 34, 422114, 422116, A61L 500, A61L 100, A61L 300
Patent
active
042397316
ABSTRACT:
Conditioning of goods for subsequent sterilization with a biocidal agent in a sealable chamber includes removal of air, and moistening and heating the goods to the desired temperature levels. Controlled evacuation of the chamber and coordinated admission of conditioning vapor into the chamber provides cyclic variations in chamber pressure between preselected subatmospheric pressures to subject goods in the chamber to a plurality of cyclic subatmospheric pressure pulses. The time required for the cyclic pressure variations is responsive to load characteristics, including heat and moisture absorption characteristics of the goods being conditioned, and is independent of prescribed times or direct measurement of load temperature. The subatmospheric pressure levels are selected based on the temperature-pressure relationship of the conditioning vapor so that chamber temperature during cyclic pulsing does not exceed the desired sterilization temperature.
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Gillis John R.
Halleck Frank E.
American Sterilizer Company
Richman Barry
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