US PATENT SUBCLASS 442 / 240
.~.~ Mechanically needled or hydroentangled

Current as of: June, 1999
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442 /   HD   FABRIC (WOVEN, KNITTED, OR NONWOVEN TEXTILE OR CLOTH, ETC.)

181  DF  WOVEN FABRIC (I.E., WOVEN STRAND OR STRIP MATERIAL) {13}
239  DF  .~ Woven fabric including an additional woven fabric layer {4}
240.~.~ Mechanically needled or hydroentangled {2}
241  DF  .~.~.~> Four or more layers
242  DF  .~.~.~> Coated, impregnated, or autogenously bonded

DEFINITION

Classification: 442/240

Mechanically needled or hydroentangled:

(under subclass 239) Subject matter wherein the woven fabric layers have been adhered to one another by a mechanical needling or hydroentanglement process.

(1) Note. In a mechanical needling process, barbed needles are forced through fiber layers and in the process displace enough fibers to cause interlayer penetration of fibers with resultant fiber layer bonding.

(2) Note. In a hydroentanglement process, streams of water are forced through fiber layers and in the process displace enough fibers to cause interlayer penetration of fibers with resultant fiber layer bonding.

SEE OR SEARCH CLASS

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

148, for a process of associating one woven web with another using a process of needling.