Protective core

Details Protective core Protective core

1992-07-10

1994-08-09

Stodola, Daniel P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

2421181, 138 98, 138118, B65H 1602

Patent

active

053358724

ABSTRACT:
A protective core for protecting the internal surface of a coil of strip material comprises, a cylindrical wall (5) formed from sheets (7, 9) of plastic material separated by webs (11) moulded integrally with the sheets to form tubular cavities extending transversely to the longitudinal axis of the core. The wall 5 is formed so that at least one of the surfaces of the wall (5) has surface irregularities (19, 21) which selectively reduce the thickness of the wall (5) compared to adjacent regions of the wall so that the wall (5) is sufficiently flexible to be folded to a collapsed form and held in that position without permanently damaging the wall (5) so that the wall (5) returns resiliently to its original cylindrical form when unfolded from the collapsed form.

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patent: 4442686 (1984-04-01), Beffart et al.
patent: 4832276 (1989-05-01), Gebhardt et al.
patent: 4923137 (1990-05-01), Jorgensen et al.

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