US PATENT SUBCLASS 53 / 90-- .~.~.~ Through lock or valve means

US PATENT SUBCLASS 53 / 90
.~.~.~ Through lock or valve means

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}
89	DF	.~.~ Machine positioned receptacle and/or closure {2}
90		.~.~.~ Through lock or valve means {2}
91	DF	.~.~.~.~> Rotary pocket or pockets {1}
94	DF	.~.~.~.~> Including closure handling means

DEFINITION

Classification: 53/90

(under subclass 89) Apparatus including means to pass receptacles and/or closures into or out of a chamber without directly exposing the interior of said chamber to the atmosphere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

274, for filling and closing devices including closure port valve means.

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414, Material or Article Handling,

217+, for apparatus for moving material between zones having different pressures and inhibiting a change in the pressure gradient existing therebetween.