Radial and flexible annular storage drum brake

Yarn braking device of a weft feeder, comprising:

• an annular brake element having a substantially conical, circumferentially continuous braking portion,
• a drum-shaped yarn storing body constituting a circumferentially continuous and circular yarn withdrawal rim,
• said annular brake element being located coaxial to said yarn storing body, said braking portion abuts said withdrawal rim under axial spring load, pressing said braking portion towards said withdrawal rim,
• said braking portion being radially flexible, and
• a flexible, wear resistant friction surface structure provided between said braking portion and said withdrawal rim and held in circumferential contact along an essentially circular braking zone at said withdrawal rim,
• wherein said friction surface structure is formed by a plurality of flat lamellas separated from each other by interspaces and being movable in relation to one another, each lamella having a front surface contacting said withdrawal rim in said braking zone, and a rear surface opposite to said front surface, said braking portion discretely pressing each lamella directly behind the location of said braking zone against said withdrawal rim.