US PATENT SUBCLASS 215 / 271
.~ Closure expands responsive to internal receptacle pressure

Current as of: June, 1999
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215 /   HD   BOTTLES AND JARS

200  DF  CLOSURES {32}
271.~ Closure expands responsive to internal receptacle pressure

DEFINITION

Classification: 215/271

(under subclass 200) Devices, wherein the closure is provided with means allowing it to expand in response to an increase in internal receptacle pressure, thus providing an increase in total receptacle-closure sealer without unseating the closure from its closed position.