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US 6,280,275 B1Granted
Method of welding shadowmask in flat cathode ray tube
AssigneeLG Electronics Inc.
InventorSung Yeun Kim
Life of this patent
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Abstract
Method for welding a mask in a flat cathode ray tube, including applying an initial tensile force to a shadow mask to prevent deformation, and fastening the shadow mask to a rail by welding, wherein fastening the shadow mask includes performing a primary spot welding having relatively long primary welding spot intervals between primary welding spots, and a secondary spot welding having secondary welding spot intervals between secondary welding spots shorter than the primary welding spot intervals.
Claims7
A method for welding a shadow mask in a cathode ray tube, comprising:
- applying an initial tensile force to a shadow mask;
- and
- welding the shadow mask to a rail, wherein welding the shadow mask includes
- performing a primary spot welding having primary welding spot intervals between respective primary welding spots, wherein each primary welding spot interval is between {fraction (1/150)}th and {fraction (1/125)}th of a length of a respective side of the rail;
- and
- performing a secondary spot welding having secondary welding spot intervals between respective secondary welding spots, the secondary welding spot intervals each being shorter than a respective primary welding spot interval.
3 more elements
Dependencies are inferred from the claim text.