The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 1995
Filed:
Feb. 01, 1994
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Core materials for strings for musical instruments of a twist of two or more multifilaments composed of a vinylidene fluoride resin. The multifilament core has a diameter of 0.1 to 5 mm, an elongation of 10 to 50%, a tensile strength of at least 30 kg/mm.sup.2, a creep elongation of at most 15% and a Young's modulus of at least 200 kg/mm.sup.2. The multifilament is made of monofilaments each having a diameter of 1 to 300 .mu.m, a dispersion diameter of at most 20%/m, a specific gravity of at least 1.6, an inherent viscosity of 0.85 to 1.6 dl/g, an apparent viscosity of 12,000 to 100,000 poise and a birefringence of 30.times.10.sup.-3. Strings for violins, cellos and the like are made by tightly wrapping the core with a metal string.