Torque-actuated expansible shaft assembly for roll core

Details Torque-actuated expansible shaft assembly for roll core Torque-actuated expansible shaft assembly for roll core

1994-08-10

1996-02-13

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Radially expansible or contractile

2425753, 2425754, 279 22, 279 224, B65H 7524

Patent

active

054906407

ABSTRACT:
An expansible shaft assembly has core-engagement shoes pivotally mounted to a shaft for pivoting outwardly into tight engagement with the interior of a roll core automatically in response to the application of torque to the shaft. The core-engagement shoes have core-engaging surfaces, some being pivotable outwardly in response to torque applied to the shaft in one axial direction and others being pivotable outwardly in response to torque applied in the opposite axial direction. The respective oppositely-actuated core-engaging surfaces can both be on the same engagement shoe or, alternatively, on different shoes spaced axially along the shaft. For maximizing the speed with which the core-engagement shoes engage the core in response to torque application, the core-engaging surfaces are preferably angularly offset significantly from a radial direction extending between the axis of rotation of the shaft and the pivot axis of the engagement shoe.

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