Expandible devices for internally gripping cores or the like

Details Expandible devices for internally gripping cores or the like Expandible devices for internally gripping cores or the like

1979-11-06

1982-06-15

Jillions, John M.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

279 2R, B65H 7524

Patent

active

043346529

ABSTRACT:
An expandible device for internally gripping a core carrying a web of material has jaw segments forming an outer cylinder surrounding a body member which may be solid or hollow. Balls are arranged in recesses around the exterior of the body member and the jaw segments have inner grooves which receive the balls. The grooves are specially shaped to taper in depth and co-operate with the disposition of the balls so that part rotation of a core supported on the jaw segments will cause the grooves of these jaw segments to progressively run over the balls, thereby to cause the jaw segments to rise and expand outwardly from the body member into frictional gripping contact with the interior of the core.

REFERENCES:
patent: 1072067 (1913-09-01), Wild
patent: 2039149 (1936-04-01), Dodge
patent: 2561745 (1951-07-01), Lerch
patent: 2908452 (1959-10-01), Jacobsen
patent: 3963250 (1976-06-01), Flagg

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