Protective core
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United States of America Patent
Stats
-
Aug 9, 1994
Grant Date -
N/A
app pub date -
Jul 10, 1992
filing date -
Jul 12, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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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