US PATENT SUBCLASS 53 / 98
.~.~.~ Resilient hold-down

Current as of: June, 1999
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53 /   HD   PACKAGE MAKING

79  DF  GAS FILLING AND/OR EVACUATING OF RECEPTACLE AND CLOSING {5}
86  DF  .~ Within enclosure {5}
97  DF  .~.~ With closure assembling means {4}
98.~.~.~ Resilient hold-down

DEFINITION

Classification: 53/98

(under subclass 97) Apparatus wherein a closure member is urged into sealing position on a receptacle by a yieldable means only.

(1) Note. The yielding means is usually for the purpose of retaining a closure in approximate sealing position while permitting the escape of gas or gases during evacuation of the receptacle, the resulting pressure differential then serving to hold the closure in place.