US PATENT SUBCLASS 53 / 87
.~.~ With screen or graduated orifices

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}
87.~.~ With screen or graduated orifices

DEFINITION

Classification: 53/87

(under subclass 86) Apparatus including either (1) a sieve-like device to retain contents entrained in the gas or gases being removed from the enclosure or (2) a series of varying sized openings through which a vacuum is gradually applied to the receptacle.