Sheet material winding core

Details Sheet material winding core Sheet material winding core

1998-11-12

2000-02-08

Walsh, Donald P.

Winding, tensioning, or guiding

Coil holder or support

Radially expansible or contractile

2425323, 242533, 2425482, 242579, 242583, 2426153, B65H 7524

Patent

active

060219726

ABSTRACT:
A winding core member of a winding core is divided along an axial direction into a first main body, a second main body and a third main body. Projections which are formed at the respective main bodies can fit into cam grooves of cams provided in the winding core member. For this reason, when the cams are rotated, inner peripheral walls of the cam grooves are engaged with the projections, and the main bodies are pulled in inwardly in a radial direction so as to approach each other, so that an outer diameter of the winding core is decreased. Therefore, after a sheet material is or sheet materials are wound in layers around an outer periphery of the winding core, the winding core can be pulled out from the sheet material(s) easily.

REFERENCES:
patent: 1115057 (1914-10-01), Delaney
patent: 1135388 (1915-04-01), Miser
patent: 1530991 (1925-03-01), Forbes
patent: 1885192 (1932-11-01), Elssner et al.
patent: 2765125 (1956-10-01), Schlesinger
patent: 3662968 (1972-05-01), Wennerberg
patent: 3667696 (1972-06-01), McCarthy
patent: 4334652 (1982-06-01), Blackburn
patent: 4422586 (1983-12-01), Tetro
patent: 5360152 (1994-11-01), Matoushek
patent: 5490640 (1996-02-01), Miller et al.

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