Method and device for storing yarn in order to feed thread without creating twisting thereof
AssigneeBtsr International S.P.A.
InventorTiziano Barea
Life of this patent
Estimating the term…
Abstract
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.
Claims14
A method for supplying thread to a textile machine without creating torsion on the thread, comprising:
- picking up the thread from a reel onto a rotary drum driven by an electric motor:
- winding the thread supplied by the reel onto the rotary drum driven by the electric motor for a number of drum rotations;
- measuring an amount of the thread wound onto the rotary drum based on the number of drum rotations of the rotary drum;
- supplying the thread from the rotary drum to the textile machine;
- measuring an amount of the thread leaving the rotary drum to supply the textile machine;
- comparing the measured amount of the thread wound onto the rotary drum to the measured amount of the thread leaving the rotary drum;
- and
- controlling speed of the rotation of the rotary drum by the comparison so the amount of the thread leaving the rotary drum is equivalent to the amount of the thread remaining wound onto the rotary drum to maintain a reserve amount of the thread wound onto the rotary drum to be constant, and thus allowing speed at which the thread is loaded to be substantially equivalent to that at which the textile machine picks up the thread from the drum, to avoid creating the torsion on the thread being supplied to the textile machine.
Dependencies are inferred from the claim text.