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:
Oct. 03, 2006
Filed:
Apr. 04, 2003
Hideki Sakonjo, Osaka, JP;
Masayasu Ishibashi, Osaka, JP;
Tetsuro Hirokawa, Osaka, JP;
Takeshi Tanamura, Osaka, JP;
Koichi Hashimoto, Osaka, JP;
Hideki Sakonjo, Osaka, JP;
Masayasu Ishibashi, Osaka, JP;
Tetsuro Hirokawa, Osaka, JP;
Takeshi Tanamura, Osaka, JP;
Koichi Hashimoto, Osaka, JP;
Shikibo Ltd., Osaka-Fu, JP;
Abstract
A unidirectional three dimensional fiber structure is provided which does not require weaving, displays a high level of interlayer strength and does not suffer from cracking, and which can also be easily produced with any arbitrary cross-section. A unidirectional three dimensional fiber structure is produced by inserting a plurality of long fibers which have been aligned unidirectionally into an inlet at one end of a cylindrical die with a plurality of needle holes in the peripheral walls thereof, and then performing needlepunch through the needle holes while drawing the plurality of long fibers out from an outlet at the opposite end of the cylindrical die.