High spiral angle winding cores

Details High spiral angle winding cores High spiral angle winding cores

1993-07-02

1995-12-05

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242118320, 156195, 138129, 138144, 493299, B65H 7510, B31C 300

Patent

active

054721547

ABSTRACT:
The invention provides spirally wound paperboard cores for winding of textiles and other materials and which have enhanced high speed winding capability. The spirally wound paperboard plies forming the body wall of the paperboard core have a predetermined spiral winding angle with respect to the axis of the cylindrical body wall of greater than 71 degrees. In winding cores having a relatively large ID of between about 4.8 in. (120 mm) and 6 in. (150 mm), the paperboard plies forming the spirally wound cores have a winding angle of greater than 74 degrees. In winding cores having a lower ID of less than 4.8 inches (120 mm), all of the paperboard plies have a width of 3.5 in. (89 mm) or less and a spiral winding angle of greater than 71 degrees.

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T. D. Gerhardt, "External Pressure Loading of Spiral Paper Tubes: Theory and Experiment"; Journal of Engineering Material and Technology; Apr. 1990; vol. 112; pp. 144-150.

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