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:
May. 27, 2003
Filed:
May. 22, 2002
Renaud Duval, Les Cheres, FR;
Messier-Bugatti, Velizy Villacoublay, FR;
Abstract
A fiber structure for needling is driven so as to impart a speed of advance thereto past a needling head carrying a plurality of needles that are driven with reciprocating motion during which they penetrate into the fiber structure and are extracted therefrom. The instantaneous speed of advance of the fiber structure decreases in response to the resistance to advance caused by the needles penetrating and subsequently increases on the needles being withdrawn. The force exerted on the needles by the advance of the structure is thus limited, without completely interrupting advance throughout the time that needles are present within the structure. The fiber structure can be caused to advance by means of a transmission presenting mechanical slack suitable for absorbing the decrease in the speed of advance caused directly by the resistance to advance that is exerted by the needles.