US PATENT SUBCLASS 53 / 320
.~.~.~ With vent means

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

285  DF  CLOSING PACKAGES AND FILLED RECEPTACLES {7}
287  DF  .~ Separate closure applying {17}
319  DF  .~.~ Closure inserting means {5}
320.~.~.~ With vent means

DEFINITION

Classification: 53/320

(under subclass 319) Apparatus including means providing for the escape of contents displaced by closure insertion.

(1) Note. Ordinarily the displaced contents consists of air in the upper portion of a receptacle.