Self-adjusting braking device for weft feeders for looms

摘要

A self-adjusting braking device for weft feeders provided with a stationary drum (11) on which are wound yarn loops (F) to be fed to a downstream textile machine, comprises a frustoconical braking member (16) which is coaxially arranged with its main base in front of the drum (11). The braking member is elastically biased against the drum (11) and is lined with a wearproof steel foil (23) extending along its inner, annular area that is to engage a delivery edge of the drum. The contact area of the foil (23) is provided with a coating (24) of amorphous carbon, generally known as DLC (Diamond-Like Coating).