Patent · US Expired

String of a synthetic resin

US4339499A · kind A · utility

26Cited by

6References

12Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Gunther Tappe · Troisdorf, DE
Bertram Gasper · Troisdorf, DE
Herbert Laubenberger · Troisdorf, DE
Richard Weiss · Rancho Santa Margarita, US

Key dates

Filing date	Apr 2, 1980
Grant date	Jul 13, 1982
Priority date	—
Expiry date	Apr 2, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2967
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A string for the stringing of rackets, bows, musical instruments and the like which has a thread-like structure of polyvinylidene fluoride. The string is obtained by extruding a rod of polyvinylidene fluoride at a melt temperature of the polyvinylidene fluoride, cooling the rod at a temperature between 60.degree.-150.degree. C., and then axially stretching the rod at this temperature following by cooling the rod to room temperature and thereafter cold-stretching the monofil. The string is characterized by an elasticity that approaches that of natural gut string.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.