US PATENT SUBCLASS 53 / 156
.~.~.~ Package reinforcing sheet or trough

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

147  DF  GROUP FORMING OF CONTENTS UNIT AND SUBSEQUENT OR FURTHER PACKAGING {5}
154  DF  .~ From plural or different supply sources {1}
155  DF  .~.~ Diverse forms or shapes of units {2}
156.~.~.~ Package reinforcing sheet or trough

DEFINITION

Classification: 53/156

(under subclass 155) Apparatus for packaging in which at least one of the contents portions is of sheet material which is either flat or bent up to partly encircle another portion of the contents and is of sufficient rigidity to materially assist the cover in establishing or maintaining the desired shape of the completed package.

SEE OR SEARCH CLASS

493, Manufacturing Container or Tube From Paper; or Other Manufacturing From a Sheet or Web,

89, for making a rigid container including assembling therewith structure reinforcement.