Jose River

US Patent:

4055941, Nov 1, 1977

Filed:

Dec 9, 1976

Appl. No.:

5/748883

Inventors:

Jose River - West Chester PA
Joe Dennis Zaharko - Wilmington DE

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

D02G 334
D02G 338
D02G 340

US Classification:

57149

Abstract:

A string suitable for use in game rackets such as for tennis contains from two to four heavy denier monofilaments of an oriented synthetic polymer. Each monofilament has at least two opposite flattened sides throughout its length. The monofilaments are ply-twisted and bonded together along their lengths with each being bonded along a flattened side to at least one other such monofilament. Particularly suitable monofilaments have a substantially ribbon-shaped cross-section with a length-to-width ratio of from two to four.