US PATENT SUBCLASS 53 / 550
.~.~ Longitudinal tube formed from single web

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}
550.~.~ Longitudinal tube formed from single web {1}
551  DF  .~.~.~> Vertically disposed tube {1}

DEFINITION

Classification: 53/550

Longitudinal tube formed from single web:

(under subclass 548) Apparatus in which a single web is folded longitudinally upon itself and seamed longitudinally to entube the contents prior to the formation of a transverse seam which isolates the contents.

SEE OR SEARCH THIS CLASS, SUBCLASS:

553, for apparatus for forming tubular covers from opposed webs.