Non-wrapped non-sleeving compact cord
AssigneeNV Bekaert SA
InventorsJoost Berghmans, Johan De Waegenaere, Pierre Klingeleers, Frans Van Giel
Life of this patent
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Abstract
A steel cord (10) adapted for the reinforcement of elastomeric articles including a center structure of one to five center filaments (16) and a maximum of two layers of layer filaments surrounding said center structure: an outer layer of outer layer filaments (12, 13) and optionally, an intermediate layer of intermediate layer filaments (24) between the center structure and the outer layer. All the center filaments (16) and all the layer filaments (12, 13, 24) have the same twist hand and have the same twist pitch. The outer layer filaments (12, 13) exert a force which is directed radially inward.
Claims21
A steel cord comprising:
- a center structure of one to five center filaments;
- and
- an outer layer of outer layer filaments surrounding said center structure;
- wherein all the center filaments and all the outer layer filaments have the same twist direction and have the same twist pitch;
- wherein the steel cord is free of a wrapping filament;
- that being, the steel cord consists essentially of filaments that have the same twist direction and the same twist pitch;
- and
- wherein the outer layer filaments have a preforming ratio which is smaller than one hundred percent so that the outer layer filaments exert a force which is directed radially inward, and which is of such a magnitude that sleeving of the steel cord is prevented.
A steel cord consisting essentially of:
- a center structure of one to five center filaments;
- and
- an outer layer of outer layer filaments surrounding said center structure;
- wherein all the center filaments and all the outer layer filaments have the same twist direction and have the same twist pitch;
- and
- wherein the outer layer filaments have a preforming ratio which is smaller than one hundred percent so that the outer layer filaments exert a force which is directed radially inward, and which is of such a magnitude that sleeving of the steel cord is prevented.
Dependencies are inferred from the claim text.