US PATENT SUBCLASS 53 / 554
.~.~.~ Vertically disposed tube

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

545  DF  PROGRESSIVELY SEAMED COVER WEB OR WEB FOLDS {3}
548  DF  .~ With closing of web between package units {3}
553  DF  .~.~ Plural webs {2}
554.~.~.~ Vertically disposed tube

DEFINITION

Classification: 53/554

Vertically disposed tube:

(under subclass 553) Apparatus whereby two or more webs are joined for forming an upwardly open tubular pocket closed on three remaining sides, the transversely formed seam serving to close one pocket while providing the bottom seam for a succeeding pocket.

SEE OR SEARCH THIS CLASS, SUBCLASS:

551, for apparatus forming an upwardly open pocket from a single web.