D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
D04B15/66—Devices for determining or controlling patterns ; Program-control arrangements
D04B15/68—Devices for determining or controlling patterns ; Program-control arrangements characterised by the knitting instruments used
D04B15/70—Devices for determining or controlling patterns ; Program-control arrangements characterised by the knitting instruments used in flat-bed knitting machines