Assembly of concentric layers of filaments
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United States of America Patent
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Nov 16, 1993
Issued Date -
N/A
app pub date -
Nov 20, 1991
filing date -
Sep 28, 1988
priority date (Note) -
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Abstract
An assembly (100) for the reinforcing of an article of plastic and/or rubber, characterized by the following features: (a) it comprises two adjacent concentric layers (1, 2) of filaments (10, 20), the filaments (10, 20) having their axes (O.sub.1, O.sub.2) arranged, within each of the layers, substantially on a circle (C.sub.1, C.sub.2) of radius R.sub.1, R.sub.2 ; in each layer (1, 2) the filaments (10, 20) are wound in the same direction and have the same pitch (P.sub.1, P.sub.2); (b) the layers (1, 2) have the same direction of winding; (c) R.sub.1, R.sub.2, P.sub.1, P.sub.2 are in accord with the relationship: P.sub.1 >P.sub.2 >P.sub.1 .times.[1-2(R.sub.2 -R.sub.1)/R.sub.2 ]. Articles reinforced by such assemblies, for instance pneumatic tires.
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