US PATENT SUBCLASS 156 / 121
.~.~.~.~ Applying reinforcing material to external tube surface

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

1  DF  METHODS {7}
60  DF  .~ Surface bonding and/or assembly therefor {93}
110.1  DF  .~.~ Making flexible or resilient toroidal shape; e.g., tire, inner tube, etc. {9}
118  DF  .~.~.~ Tubular (airtight) torus (e.g., auto tube-making) {4}
121.~.~.~.~ Applying reinforcing material to external tube surface

DEFINITION

Classification: 156/121

(under subclass 118) Processes including a step of applying a layer of material to the outer peripheral surface of the formed tube, which material increases the stress resistance of the tube.