US PATENT SUBCLASS 53 / 321
.~.~.~ Closure flexing means (straightening or buckling)

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}
321.~.~.~ Closure flexing means (straightening or buckling)

DEFINITION

Classification: 53/321

(under subclass 319) Apparatus including means whereby the straightening and/or buckling of portions of a closure member inserted within the aperture of a preformed receptacle serves to engage the sides of said aperture, either merely frictionally or by interlock with receptacle projections, thereby securing said closure member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

359+, for filler or forcer die means which distort or shape portions of the closure member to secure said closure to the receptacle.