IPC 2013 : D04B 11/32 : welts, e.g. double or turned welts.

IPC2013 > D > D04 > D04B > D04B 11/00 > D04B 11/32[3] > welts, e.g. double or turned welts.
Notes[t] D01 - D07: TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
Notes[g] D04B 1/00 - D04B 15/00: Weft knitting; Machines therefor
D SECTION D — TEXTILES; PAPER.
D04 BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS.
D04B KNITTING.
D04B 11/00 Straight-bar knitting machines with fixed needles (flat-bed machines with independently-movable needles D04B 7/00).
D04B 11/32 · · · welts, e.g. double or turned welts.