A storage yarn feeder includes a body having a portion or drum onto which winds a yarn forming at least one coil, the yarn coming from a reel, being provided with a braking organ cooperating with the drum to brake the yarn leaving the drum, the braking organ including braking features capable of cooperating with the yarn when the yarn detaches from the drum as it leaves the feeder and heads towards a textile machine. The drum includes a first and a second portion, the latter being capable of supporting the yarn and being separable from the first portion to be capable of being replaced, the first portion being connected to the body of the feeder.

A storage yarn feeder includes a body having a portion or drum onto which winds a yarn forming at least one coil, the yarn coming from a reel, being provided with a braking organ cooperating with the drum to brake the yarn leaving the drum, the braking organ including braking means capable of cooperating with the yarn when the yarn detaches from the drum as it leaves the feeder and heads towards a textile machine. The drum comprises a first and a second portion, the latter being capable of supporting the yarn and being separable from the first portion to be capable of being replaced, the first portion being connected to the body of the feeder.

A method for supplying a thread to a textile machine without creating torsions thereof includes picking up the thread from a reel, winding it on a rotary drum driven by an electric motor thereof and supplying such thread to the textile machine, preferably at constant tension and/or quantity. The method provides for measuring the amount of thread leaving the rotary drum and the amount of thread wound thereon and intervening on the rotation of such drum so the amount of thread leaving the drum is equivalent to the amount loaded thereon to avoid the creation of torsion on the thread. A device for implementing such method is also disclosed.

A weft feeder for weaving looms with spaced thread coils and adjustable-diameter drum formed of several fixed sectors, each provided with respective support shanks housed in respective seats formed in a static support disk, coaxial to a drive shaft of the weft feeder, and wherein the spacing of said spaced coils on the drum is caused by the oscillatory and tilting movement of several moving sectors, each provided with respective support shanks housed in respective seats formed in a tilting support disk, eccentric and skew with respect to said drive shaft of the weft feeder, and wherein elastic elements are provided, which exert a compressive force on said shanks to keep said fixed sectors and said moving sectors in a position of stable engagement within their respective seats. The fixed sectors and the moving sectors are each provided with a single support shank in the general shape of a trapezoidal right prism, housed in a respective seat consisting of a cavity having a congruent trapezoidal shape, and said elastic elements exert a compressive force on the major base of said support shank having the shape of a trapezoidal right prism.