Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1994-07-26
1996-12-31
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 18A, B65H 67044, B65H 5400
Patent
active
055886019
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method and apparatus for winding a yarn into a cross wound package, and having provision for securing the free yarn end to the package at the conclusion of the winding operation.
The spinning of synthetic fibers, especially an automated spinning process, have in the past presented difficulties in protecting the free yarn end of the package removed from the takeup machine at the end of a winding cycle against contamination during its transportation, and in particular, in locating it again after transportation to a further processing station. Until now, attempts known from the prior art and directed to the identification of the yarn end in the winding of an endless filament yarn at the end of a winding cycle, so that it is again easily locatable, have been unsuccessful.
For example, in a method known from DE 40 23 291 A1, the yarn end of a cross-wound package is easier to locate in that for purposes of forming a yarn reserve upon reaching a certain package diameter or a certain amount of yarn, the yarn is guided across the peripheral surface to the tube or along a secant line across the end surface of the package, and subsequently returned to its peripheral surface.
According to the method described in DE 25 06 930 A1, for purposes of facilitating the locating of the yarn end, a yarn reserve is likewise formed at the end of the winding cycle. To this end, the package is removed from the takeup device and rotated slowly in opposite direction to the direction of winding, the yarn end being grasped pneumatically and sucked off by a yarn suction device. Subsequently, the opening of the yarn suction device swings toward one end of the winding tube projecting from the package, whereupon the yarn is delivered by the yarn suction device to the winding tube, or blown into the winding tube, or wound about the end of the Winding tube in that the package is again rotated in its direction of winding.
While the first-mentioned method has not been suitable to ensure a troublefree relocating of the yarn end, it has been possible to use the second method in takeup machines for an automated spinning only after doffing the package from the winding spindle.
In takeup devices, on which the present invention is based, the yarn is lifted out of the yarn traversing mechanism at the end of the winding cycle, and until it is cut, it advances, guided by a suitable auxiliary device, onto the package in a narrow axial region of the decelerating package, thereby forming a bead-shaped, narrow accumulation of yarn (note, for example, DE 23 28 828 C2).
It is therefore the object of this invention to provide a simple and low-cost possibility of securing the free yarn end upon termination of the winding cycle such that it is easy to relocate during the further handling of the package.
SUMMARY OF THE INVENTION
The above and other objects and advantages of the present invention are achieved by the provision of a method and apparatus for winding a continuously advancing yarn onto a rotating bobbin, and which comprises the steps of winding the advancing yarn onto the rotating bobbin while traversing the yarn at a location upstream of the bobbin to thereby form a rotating cross wound package. The traverse of the advancing yarn is then terminated, and the yarn is then deposited on the rotating package in an axially narrow region of the package surface so as to form a yarn accumulation. Thereafter the advancing yarn is severed to form a free yarn end, and the free yarn end is then pressed into the yarn accumulation on the surface of the rotating package, and such that the free yarn end is secured to the package and is easily locatable.
It has shown that this simple measure permits to deposit the yarn end into the yarn bead forming on the package as it slows down, so as to secure it, on the one hand, in an adequate manner especially for internal transportation, and on the other hand, however, to make it possible to locate it again easily for the further processing of the package, for
REFERENCES:
patent: 3907217 (1975-09-01), Graf et al.
patent: 4138072 (1979-02-01), Aoyama et al.
patent: 4339089 (1982-07-01), Dobbins
patent: 4948058 (1990-08-01), Behrens et al.
patent: 5016829 (1991-05-01), Schippers et al.
patent: 5029762 (1991-07-01), Behrens et al.
patent: 5318232 (1994-06-01), Busenhart et al.
Fiber Producer; Aug. 1979; pp. 20 and 21.
Barmag AG
Mansen Michael R.
Stodola Daniel P.
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