Expandable mandrel core

Details Expandable mandrel core Expandable mandrel core

1998-08-12

2000-09-19

Nguyen, John Q.

Winding, tensioning, or guiding

Convolute winding of material

Simultaneous winding

242520, 242571, B65H 1808, B65H 7524

Patent

active

061199745

ABSTRACT:
An expandable annular core is provided for mounting on a conventional expandable mandrel of a coil slitting machine to achieve a greater inner diameter for the coil wound thereon. The inner diameter of the annular core is approximately equal to the outer diameter of the expandable mandrel, and the outer diameter of the core is equal to the desired inner diameter of the coils. A plurality of cores are placed in series on the mandrel, each core being adapted to receive a strand of slit metal on it's outer surface. The cores are capable of expanding and contracting with the mandrel to facilitate removal of the coils from the recoiler. To effect this expansion and contraction, the annular core has a radial slot or joint, preferably with opposing ends of at tongue and groove-shaped configuration.

REFERENCES:
patent: 1328408 (1920-01-01), Walker
patent: 3396918 (1968-08-01), Adamson et al.
patent: 3406924 (1968-10-01), Bruns et al.
patent: 3878999 (1975-04-01), Daves
patent: 4093140 (1978-06-01), Matsunaga
patent: 4201352 (1980-05-01), Madachy
patent: 5480106 (1996-01-01), Voissem
patent: 5520353 (1996-05-01), Brandstetter et al.
patent: 5904315 (1999-05-01), McInerney

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