Casing for binders and books
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United States of America Patent
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-
Aug 3, 1999
Grant Date -
N/A
app pub date -
Feb 11, 1997
filing date -
Jan 12, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A casing for a binder or book is disclosed in which there is at least one stiff panel portion and a thermoplastic sheet for covering the panel portion with the end and/or edge portions of the sheet being folded under and secured to the underside of the panel portions. The sheet comprises between about 30% and about 55% copolymer of propylene and ethylene; from 0% to about 12% propylene homopolymer; between 0% to about 20% high density polyethylene; between about 23% and about 35% calcium carbonate or talc filler. The product is especially adapted for high speed machines for making binder casings.
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