Karl Mayer Textilmaschinenfabrik GmbH, Germany, have devolped the HKS 4-1 high performance tricot warp knitting machine. Details are provided on the design and operation of the four-bar machine which is capable fo producing both elastic and inelastic fabrics. Full technical data is presented on the width and guage, guide bars, needles, warp feed, pattern drive, warp beam arrangement, fabric take-down, fabric batching and speed capability.