摘要 |
<p>The twisting wire member 6 comprises a serpentine wire 7 and fixing threads 8 extending substantially parallel to a longitudinal axis 9 of the twisting wire member 6. Control threads 13, which have good constancy of length under tension, are laid parallel to the longitudinal axis 9, that is not interwoven with wire 7, and are linked to the twisting wire member 6 by adjacent fixing threads 8. The control threads of figure 2 are coated with a dark adhesive agent and are thereby also bonded to the wire 7. The control threads 13 may consist of a bundle of glass fibres or a bundle of carbon fibres. <IMAGE></p> |