B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
21/10, 217/124,
B65D 81/20 (2006.01) A61L 2/20 (2006.01)
Patent
CA 1115240
Abstract A sealed container provided with a valve opening and a resilient valve member self-biased into closing position. The valve is manually openable by a lever which is held in the open position by a rigid fuse-like element which melts after being subjected to sterilizing temperatures long enough to sterilize the container and its contents. The valve then closes, sealing the container. The valve and ~ a gasket between the container lid and base will permit leakage out of the box to permit the withdrawal of steam from the container when a vacuum is applied to the container exterior but will prevent reverse flow so that vaccum is maintained within the container once one is created. The vaccum may be released by opening the valve, which simultaneously cocks it for the next sterilizing operation. An alternate approach includes a disposable, resilient valve member which plugs into a hole in the wall of the container and covers a valve orifice into the container. A washer-like fuse element fits into the valve member to bias it into an open position. When the fuse melts after sterilization, the valve member will snap into closed position. Another variation of a plug valve employs a heat responsive band having one end attached to the side of the plug which is on the outer side of the plug when the plug is positioned in the container wall. The other end of the band extends around the edge of the plug holding the edge away from a valve opening in the wall of the container. This inner end of the band is connected through wire to a fusible pin centrally positioned on the inner side of the plug. At the desired time, the fuse melts releasing the wire and the band shrinks or retracts, releasing the edge of the valve member allowing it to seal against the container wall. - 1 -
265903
Sanderson Roger S.
Whelchel Robert C.
Gowling Lafleur Henderson Llp
Sanderson Roger S.
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