Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1979-05-25
1981-09-29
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 23, 34 37, 34 60, 264342R, 264342RE, F26B 100
Patent
active
042914701
ABSTRACT:
A method of preshrinking a semipermeable membrane or blood bag of the type used in an artificial-kidney coil dialyzer, so as to prevent or minimize shrinkage of the membrane during sterilization of the dialyzer. The preshrinking method of the present invention includes the steps of passing the membrane through a humidity chamber in a free-hanging state and then into a warm air drying chamber. The amount of membrane shrinkage can be controlled by varying the residence time, the temperature and the humidity of the chamber. By preshrinking the membrane to approximate the amount of shrinkage which normally occurs during the sterilization, substantially all shrinkage during sterilization is eliminated.
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patent: 2459345 (1949-01-01), Sisson
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patent: 2934400 (1960-04-01), Siggel et al.
patent: 3684553 (1972-08-01), Van Dyk
Baxter Travenol Laboratories Inc.
Flattery Paul C.
Geren Gerald S.
Joyce Harold
Makay Albert J.
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