Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1975-06-25
1976-05-18
Gilreath, Stanley N.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
66132R, 242 4712, B65H 5120
Patent
active
039572170
ABSTRACT:
A storage drum adapted to have yarn wound thereon tangentially adjacent the rear end thereof for forming thereon a plurality of windings which advance axially toward the forward end thereof. The drum comprises a surface of revolution about the longitudinal axis thereof, which has a yarn loading section and a yarn winding accumulating section joined together at a point of inflection. The yarn loading section extends rearwardly of the point of inflection and the yarn accumulating section extends forwardly of the point of inflection. The loading section is shaped so that a tangent thereto immediately rearwardly of the point of inflection forms an angle with the drum axis whose tangent is greater than the coefficient of static friction between yarn and drum surface and so that tangents to progressively more rearward points along the loading section form progressively larger angles with the drum axis. The accumulating section is shaped so that a tangent thereto immediately forwardly of the point of inflection forms an angle with the drum axis whose tangent is less than the coefficient of dynamic friction between yarn and drum surface and so that tangents to progressively more forward points along the accumulating section form progressively smaller angles with the drum axis.
REFERENCES:
patent: 3225446 (1965-12-01), Sarfati et al.
patent: 3637149 (1972-01-01), Frei
patent: 3720384 (1973-03-01), Rosen
patent: 3737112 (1973-06-01), Tellerman et al.
patent: 3759300 (1973-09-01), Pfarrwaller
patent: 3782661 (1974-01-01), Deniega et al.
patent: 3834635 (1974-09-01), Pfarrwaller
Gilreath Stanley N.
Lerner Henry R.
Wesco Industries Corporation
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