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:
Jan. 27, 2004
Filed:
Jun. 25, 2001
Theodoor Christiaan Anna Hens, Eindhoven, NL;
Wilhelmus Marinus Maria Van De Steen, Eindhoven, NL;
Jean Winters, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
In the manufacturing process of a color display tube ( ), the display window ( ) is assembled with the funnel shaped part ( ) in a furnace by subjecting them to a heat treatment. This heat treatment can lead to deformation of the color selection electrode ( ), because in color display tubes ( ) with an invar shadow mask ( ), the diaphragm parts ( ) are made from invar as well, while the corner sections ( ) are made from iron in order to obtain enough stiffness. The difference in expansion coefficient between invar and iron leads to shearing of the welds ( ) that connect the diaphragm parts ( ) to the corner section ( ). To overcome this problem the invention proposes to provide the diaphragm parts ( ) with slits ( ) or impressions ( ), which are arranged so that no stress occurs between the spot welds ( ) when the color selection electrode ( ) is heated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile