Yarn winding apparatus and method
AssigneeBarmag AG
InventorManfred Mayer
Life of this patent
Estimating the term…
Abstract
A yarn traversing apparatus for reciprocating a running yarn to form a wound yarn package, and wherein the yarn is reciprocated by sequential contact with oppositely rotating rotator blades. The blades can each be driven at a variable rotational speed, so that irrespective of the position of the yarn radially along the length of the rotator blades, the traversing speed of the yarn can be controlled so as to follow a predetermined traversing speed profile, which may be constant or variable.
Claims17
A yarn traversing apparatus for reciprocating a running yarn transversely to its running direction over a predetermined traverse stroke, comprising
- a guide bar having a guide edge which extends generally in the direction of the yarn traverse,
- a pair of rotary blades,
- a pair of rotors rotatably mounting respective ones of the rotary blades so that the outer extremities of the blades move along the guide edge,
- drive means for rotatably driving each of the rotary blades in opposite direction such that one of said blades moves the running yarn along the guide edge and toward one end thereof and the other of said blades moves the running yarn along the guide edge toward the other end thereof, and
- a control system for variably and separately controlling the rotational speed of each of the rotary blades so that the yarn may be guided along the guide edge of the guide bar by each of said rotary blades in a predetermined traversing speed profile.
A yarn winding apparatus for winding a plurality of running yarns to form a corresponding number of yarn packages, comprising
- a winding spindle for mounting a plurality of bobbin tubes in a coaxial arrangement,
- a yarn traversing mechanism for reciprocating each of the running yarns along respective traverse strokes and so as to form a wound yarn package on each of the bobbin tubes, and wherein each of the traversing mechanisms comprises
- (a) a guide bar having a guide edge which extends generally in the direction of the yarn traverse,
- (b) a pair of rotary blades,
- (c) a pair of rotors rotatably mounting respective ones of the rotary blades so that the outer extremities of the blades move along the guide edge,
- (d) drive means for rotatably driving each of the rotary blades in opposite direction such that one of said blades moves the running yarn along the guide edge and toward one end thereof and the other of said blades moves the running yarn along the guide edge toward the other end thereof, and
- (e) a control system for variably and separately controlling the rotational speed of each of the rotary blades so that the yarn may be guided along the guide edge of the guide bar by each of said rotary blades in a predetermined traversing speed profile.
A method of winding a running yarn onto a rotating bobbin tube to form a yarn package, and comprising the steps of
- reciprocating the running yarn transversely to its running direction over a predetermined traverse stroke, and including sequentially contacting the running yarn with each of a pair of oppositely rotating rotary blades such that one of the rotary blades moves the running yarn along the traverse stroke toward one end thereof and the other of the rotary blades moves the running yarn along the traverse stroke toward the other end of the traverse stroke, and
- variably and separately controlling the rotational speed of each of the rotary blades so that the yarn is moved along the traverse stroke in a predetermined traversing speed profile.
A method for winding a plurality of running yarns to form a corresponding number of yarn packages, comprising the steps of
- mounting a plurality of bobbin tubes in a coaxial arrangement on a winding spindle to define adjacent winding positions,
- reciprocating each of the running yarns along respective traverse strokes at each of the winding positions and so as to form a wound yarn package on each of the bobbin tubes, and including sequentially contacting each running yarn with each of a pair of oppositely rotating rotary blades such that one of the rotary blades moves the running yarn along the traverse stroke toward one end thereof and the other of the rotary blades moves the running yarn along the traverse stroke toward the other end of the traverse stroke, and
- controlling the rotation of the rotary blades such that the rotary blades of adjacent winding positions which rotate in the same direction are driven asynchronously relative to each other.
Dependencies are inferred from the claim text.