Method for manufacturing a string in a form ready for a racket, a string manufactured by said method, and method for supply to stringing rackets with said string

US4835036A · kind A · utility

Assignee

• Isosport Verbundbauteile GES.m.b.H. · AT

Inventors

• Herbert Woltron · Worms, DE
• Robert Schamesberger · Eisenstadt, AT

Key dates

• Filing date: Jul 8, 1986
• Grant date: May 30, 1989
• Expiry date: Jul 8, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2969
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The method relates to the production of a string (24) for a racket, particularly a tennis racket. The string is a known string, for example a gut string or a synthetic string. The conditioning of the string on a support (1), particularly a bobbin, is effected under a traction tension and the length of the string is kept constant. Thus, the elongation of the string under the traction tension effect when winding the string on the support (1) is conveniently between 5 and 15%. The stringing of the racket with the thus conditioned string (24) should be carried out in an interval of 60 minutes, but preferably 30 minutes, from the removal time of the string from its support (1). The relaxation of the string, i.e. the decrease of tension after the stringing of the racket, is considerably smaller with a string conditioned according to the invention than with a same string which has not been conditioned. Such relaxation reduction is particularly important with a polypropylene string.