Method and device for intermittently storing and returning yarn

Details Method and device for intermittently storing and returning yarn Method and device for intermittently storing and returning yarn

1988-03-17

1989-08-08

Gilreath, Stanley N.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 45, B65H 5442, B65H 5938

Patent

active

048545120

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A device and method for winding conical bobbins with yarn withdrawn at constant speed from individual spinning units, and comprising: a deflecting roller, or similar element, which is connected to and moved backwards and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 plate element which by storing and returning the yarn compensates for the different speeds 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 its normal feed path; two proximity sensors positioned to define the regular range of swing of the flat yarn storage and return element; an electronic control unit which receives an electrical signal or several electrical signals provided by the proximity sensors when the yarn storage and return swings stray outside the regular range in order to generate, when said signals occur, an electrical control signal which activates a bidirectional drive unit; a bidirectional drive unit which inclines the conical bobbin axis, so displacing the diameter of effective contact between the conical bobbin and the drive roller, in order to vary the yarn winding speed and so return the storage swing to within the range of values corresponding to regular storage.

REFERENCES:
patent: 4019691 (1977-04-01), Wroclawski et al.
patent: 4120462 (1978-10-01), Raasch et al.

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