US PATENT SUBCLASS 156 / 380.1
.~.~.~ With tube-forming means

Current as of: June, 1999
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156 /   HD   ADHESIVE BONDING AND MISCELLANEOUS CHEMICAL MANUFACTURE

349  DF  SURFACE BONDING MEANS AND/OR ASSEMBLY MEANS THEREFOR {34}
379.6  DF  .~ With means applying wave energy or electrical energy directly to work {4}
379.8  DF  .~.~ With means to assemble laminae or position them relative to each other {3}
380.1.~.~.~ With tube-forming means

DEFINITION

Classification: 156/380.1

With tube-forming means:

(under subclass 379.8) Subject matter including a mechanism for forming a tube from planar, usually one-layer, material.

(1) Note. Usually radiant heat is applied to the tube seam for bonding.

(2) Note. A mechanism for performing a mere bonding operation upon material already in the form of a tube, e.g., seaming to make bags from a tube, is not included herein.