Yarn-braking device in weft feeders for textile machines

摘要

A weft feeder is provided with a weft-storing drum (12) having a delivery edge (12a) from which the yarn (F) is unwound to be fed to a textile machine. A yarn-braking device comprises a frustoconical, hollow braking member (32) supported with its larger base facing the drum and coaxially biased with its inner surface against the delivery edge (12a) of the drum. The edge (26a) of the larger base of the braking member (26) is lined with a protection ring (32) having an inner, circumferential slot (34) formed in the direction of the generatrices of the cone in which the edge of the larger base (26a) is received.