Method of winding yarn on a bobbin or the like in a stepwise hig

Details Method of winding yarn on a bobbin or the like in a stepwise hig Method of winding yarn on a bobbin or the like in a stepwise hig

1993-07-02

1995-09-05

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 43R, B65H 5438, B65H 5428

Patent

active

054472776

ABSTRACT:
The stepwise high precision winding method includes winding the yarn on the bobbin with a reciprocating yarn changing guide in a series of steps so that an outer circumferential speed of the yarn-bobbin package is constant; reducing the yarn guide reciprocation frequency in each step from a starting frequency value to a final frequency value while keeping a winding number constant during each step so that the final frequency value is proportional to a bobbin rotation frequency in each step, and then increasing the yarn guide reciprocation frequency discontinuously to another starting frequency value and beginning a following step with the yarn guide reciprocation frequency equal to the other starting frequency value; setting the starting frequency value in each step to not more than a fixed maximum frequency; setting the final frequency value in each step to not less than a certain fixed minimum frequency; and setting the winding number in the Sth step equal to either i.sub.S -i.sub.S x/(M.sub.S +x) or i.sub.S +i.sub.S x/(M.sub.S -x), wherein x=a/2H; i.sub.S is a mirror value for the Sth step, M.sub.S is the order of the mirror value for the Sth step, a=the lay spacing between windings of a Kth lay and a (K+M.sub.S)th lay and H is a total height of the yarn-bobbin package.

REFERENCES:
patent: 4504021 (1985-03-01), Schippers et al.
patent: 4504024 (1985-03-01), Gerhartz
patent: 4667889 (1987-05-01), Gerhartz
patent: 4697753 (1987-10-01), Schippers et al.
patent: 4771961 (1988-09-01), Sugioka
patent: 4779813 (1988-10-01), Sugioka et al.
patent: 5056724 (1991-10-01), Prodi et al.

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