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US 6,904,744 B2Granted
Steel cord for reinforcing rubber articles
AssigneeNV Bekaert SA
InventorsHans Cauwels, Dirk Meersschaut, Stijn Vanneste
Life of this patent
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Abstract
Steel cord includes a first group and a second group. The second group is helically twisted around the first group with a cord twisting step. The first group includes a first number of first steel filaments. The first number ranges between three and eight. The second group comprises a second number of second steel filaments. The second number is equal to or greater than the first number. The first filaments having a twist step greater than 300 mm. At least one of the second filaments is polygonally performed in order to allow rubber penetration.
Claims9
A steel cord, comprising:
- a) a first group and a second group;
- b) said second group being helically twisted around said first group with a cord twisting step;
- c) said first group including a first number of first steel filaments, and said first number ranging between three and eight;
- d) said second group including a second number of second steel filaments, and said second number being one of equal to and greater than said first number;
- e) said first filaments having a twisting step greater than 300 mm;
- and
- f) at least one of said second filaments being polygonally preformed.
4 more elements
Dependencies are inferred from the claim text.