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:
Aug. 17, 2004
Filed:
Mar. 01, 2001
Applicant:
Inventors:
Joseph Arthur Reed, York, PA (US);
Gary Lee Diven, Lancaster, PA (US);
Assignee:
Thomson Licensing S.A., Boulogne-Billancourt, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 2/981 ;
U.S. Cl.
CPC ...
H01J 2/981 ;
Abstract
The present invention provides a tension mask having a frequency distribution with improved vibration damping. The tension mask includes a center portion between two edge portions. The tension mask also has a parabolic frequency distribution between the edge portions whereby the center portion has a central frequency distribution value and the edge portions have a relatively lower peripheral frequency distribution value characterized in that the range of variation between the center and edge portions frequency distribution value is in the closed interval of about 8 Hz≦&Dgr;≦12 Hz.