FABRIC WITH WOVEN MARKERS
1 Assignment
0 Petitions
Accused Products
Abstract
Markings visible by automatic optically guided cutting equipment are provided in a fabric such as a double layer fabric for one-piece-woven air bags by groups of black marker weft yarns which contrast with the other (white) weft yarns and warp yarns. The marker weft yarns emerge onto the upper face of the fabric only in predetermined marker areas spaced apart in the warp direction by other white weft yarns to afford optically identifiable markings spaced apart along said weft yarns and spaced apart along the direction of the warp yarns. The arrangement avoids the need for black warp yarns and thus avoids the inconveniences and loom down-time associated with required alterations to the locations of such optically detectable marker areas in the fabric web.
14 Citations
25 Claims
-
1-14. -14. (canceled)
-
15. A fabric web comprising:
-
a first plurality of yarns having a majority colour; a second plurality of yarns having a contrasting colour that contrasts with a majority colour of the first plurality of the yarns. A plurality of markings provided by marker weft yarns of the contrasting colour, without relying upon warp yarns of other than the majority colour, the marker weft yarns, or groups of the marker weft yarns, being provided at predetermined locations spaced apart in a warp direction by weft yarns of the majority colour, the marker weft yarns being woven into the fabric web so as to be visible from a first side of the fabric in predetermined marker areas of the fabric web and less visible in a remainder of the fabric web to afford, by the marker areas, optically identifiable markings which are spaced apart along the warp and weft directions and wherein the marking in terms of numbers of warps and wefts is small in relation to a number of warps across the fabric web and the number of wefts between one marking and the next, in the warp direction, and wherein each group of marker weft yarns extends through a respective marker area or through several marker areas at the same position along the fabric web and spaced apart across the fabric web. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification