A - Human Necessities – 41 – F
Patent
A - Human Necessities
41
F
223/1, 2/109, 16
A41F 9/00 (2006.01) B29C 65/08 (2006.01) B29C 65/74 (2006.01) D06H 7/22 (2006.01)
Patent
CA 1305292
18a:Q1-101a:11/13/86:kt (Q1-101a) Filed by Express Mail Label B62238801 on November 13, 1986 TITLE: WAISTBAND INTERLINING WITH THIN EDGES AND ITS ULTRASONIC FORMATION INVENTOR: WARREN N. CRAWFORD ABSTRACT Waistband interlinings are made by ultrasonically cutting a fabric having warp yarns and fill yarns of a thermoplastics material along lines parallel to the warp threads. An acrylic finish on the fabric permits it to undergo the ultrasonic cutting, will retard the development of brittleness in the fused fibres, and keep the resulting fused edge intact. The fabric should have at least 30 fill yarns per inch but no more than 42 warp yarns per inch. The fabric is cut by passing it between a stationary pressing element, or knife, and the horn of an ultrasonic generator. The fill yarns melt as they pass between the knife and the horn and fuse into adjacent fill threads to form a con- tinuous edge along the length of the cut fabric. The re- sulting waistband material has a smooth edge formed from fill, or weft, fibres fused to each other and to not more than one warp thread. The waistband interlining finds use in a waistband assembly for slacks and pants.
551686
Qst Industries Inc.
Smart & Biggar
LandOfFree
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