(57) The present invention relates to a method of forming, on needle looms, a bridge in
ribbons particularly for up-down moving curtains using, to form the bridge on the
ribbon, a warp yarn as a weft yarn.
The cited warp yarn is heat preset to exhibit, on completion of the bridge, a hot
shrinkage rate which is lower than that of the ribbon.
The warp yarn is, moreover, taken from a first side of the ribbon over and across
all the warp yarns in the cited ribbon, to engage with at least one warp yarn in the
edge of the ribbon second side, thereafter the warp yarn is taken likewise back to
the first side to engage with at least one warp yarn in the edge of the cited first
side se as to form said bridge.
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