US PATENT SUBCLASS 156 / 143
.~.~ Helical wire or plural ring reinforced flexible tube making

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}
143.~.~ Helical wire or plural ring reinforced flexible tube making {1}
144  DF  .~.~.~> Assembling preformed helical coil or rings with separate tube

DEFINITION

Classification: 156/143

(under subclass 60) Processes directed to making of flexible hollow conduits or hose and reinforcing the conduit or hose with either by a helical wire or by plural rings.

(1) Note. The helical wire may be applied as a preformed

coil (144) or may be wound with or around the tube during winding thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

169+, for processes of winding a filamentary material to form a helical coil.

184, for processes of winding of a sheet or web to form a hollow tube.

433+, for laminating apparatus including means to form a helical wire. 443+, for means to wind a sheet or web to form a hollow tube.