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. 07, 1991
Filed:
Jan. 02, 1990
Applicant:
Inventor:
Allan D Kautz, Naperville, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; B23K / ;
U.S. Cl.
CPC ...
445 30 ; 21912163 ;
Abstract
Continuous, or seam, welding of a foil tension mask (FTM) to a support structure in a color cathode ray tube (CRT) affords various advantages such as a more uniform, stronger weldment, reduced weld power, faster welding speeds, and reduced contamination of the FTM and the CRT's glass faceplate. A continuous CO.sub.2 laser beam operated at approximately 185 watts output power provides sufficient energy to form a high strength FTM-support structure bond while avoiding severing the FTM as well as fouling of the small FTM spertures by the heated, molten portions of the FTM and its support structure.