Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1988-03-17
1989-08-08
Gilreath, Stanley N.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 18DD, 242154, B65H 5406, B65H 5410
Patent
active
048545090
ABSTRACT:
A device and method for winding conical bobbins with yarn withdrawn at constant speed from individual spinning units, and comprising: a deflecting roller or similar element, which is connected to and moved backwards and forwards by a swinging flat element for yarn storage and accumulation, to compensate the variation in the speed at which the yarn is collected on the conical surface of the bobbin under formation wherein yarn is drawn into the storage position and is then released from this storage position, (i.e. returned). This returning operation releases the yarn from its storage position and replaces it (returns it), to is normal feed path; an electronic or similar yarn tension measurer of known type for measuring the tension values of the yarn being wound and to generate electrical signals proportional to said values; an electrical comparator for comparing said electrical signals with one or more reference signals to generate a control signal when an electrical signal arises which indicates a non-regular yarn tension; an electronic control unit for converting said control signal into a signal which varies the amplitude of the swing motion of a drive source; a drive source which increases or decreases the amplitude of its intermittent drive motion in order to adjust the swing movement of the storage arm to an amplitude which is slightly greater or slightly less than the previous value in order to rapidly restore the yarn tension to within the range of values corresponding to regular tension.
REFERENCES:
patent: 3231216 (1966-01-01), Lemarchand
patent: 3640477 (1972-02-01), Furst
patent: 4002306 (1977-01-01), Raasch
patent: 4083506 (1978-04-01), Mander et al.
patent: 4113193 (1978-09-01), Raasch et al.
patent: 4133493 (1979-01-01), Schewe
patent: 4312482 (1982-01-01), Schewe
Boller Giorgio
Colli Luigi
Ferro Francesco
Gilreath Stanley N.
Savio S.p.A.
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