US PATENT SUBCLASS 53 / 540
.~.~ Stacking one article or group of articles upon another

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}
531  DF  .~ Layer, stack, or column {10}
540.~.~ Stacking one article or group of articles upon another {1}
541  DF  .~.~.~> Building up the stack from the bottom

DEFINITION

Classification: 53/540

Stacking one article or group of articles upon another:

(under subclass 531) Apparatus for placing contents portions comprising singular units or singular rows one upon the other in vertical array and subsequently completing the packaging of the group as stacked.

SEE OR SEARCH THIS CLASS, SUBCLASS:

535, for apparatus involving stacking on a lowerable support.

537, for apparatus which stack successive coplanar layers.