US PATENT SUBCLASS 242 / 438
.~ For prestressing core


Current as of: June, 1999
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242 /   HD   WINDING, TENSIONING, OR GUIDING

430  DF  COMPOSITE ARTICLE WINDING {11}
438.~ For prestressing core {1}
438.1  DF  .~.~> By orbiting material supply


DEFINITION

Classification: 242/438

For prestressing core:

(under subclass 430) Subject matter comprising a winding mechanism having means to develop longitudinal tension in a portion of the elongated material prior to winding, which tension is of such a magnitude as to exert an appreciable compression force on the core after winding.

(1) Note. Typically, the material is a relatively strong metallic or plastic cable applied to a core (e.g., a rotatable pipe or vessel or a stationary fluid reservoir) to strengthen the resulting article against internal pressure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

410+, for a tensioner in a winding device or of general use.

SEE OR SEARCH CLASS

57, Textiles: Spinning, Twisting, and Twining,

3+, for winding an indefinite length strandlike structure.

138, Pipes and Tubular Conduits, for a particular pipe structure.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture, particularly

166+, 184+, 425+, and 443+ for winding material claimed with bonding.

220, Receptacles,

62.19+, and 588+ for receptacles having a wall that includes a layer of wound elongate material.