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:
Jul. 11, 2006
Filed:
Apr. 22, 2003
Yann Belleguic, Tonquedec, FR;
Clemence Julia Genevieve Marie Perrot, Le Havre, FR;
Jean Fabrice Marcel Portal, Sainte Adresse, FR;
Yann Belleguic, Tonquedec, FR;
Clemence Julia Genevieve Marie Perrot, Le Havre, FR;
Jean Fabrice Marcel Portal, Sainte Adresse, FR;
Hurel Hispano, Gonfreville L'Orcher, FR;
Abstract
The invention relates to a method of producing and checking a double-resonator honeycomb acoustic panel. The aforementioned panel is characterised in that, following the assembly of the two honeycombs and the partition and prior to the assembly of at least one of the two liners, the perforation rate of said partition is checked by scanning same with digital camera. The successive images thus obtained are transmitted to a computer which determines the perforation rate T of the partition by applying formula T=N1/N, wherein N1 is the number of pixels that correspond to the holes and N is the number of pixels in the image.