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. 14, 1991
Filed:
Dec. 30, 1988
Allan D Kautz, Naperville, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
Abstract
A magnetic collector disposed about the nozzle of a laser used for welding and severing a steel foil tension mask (FTM) in a color cathode ray tube (CRT) removes debris produced during laser welding and cutting. A plurality of magnets are mounted to a soft iron ring disposed about the laser beam exit aperture and are positioned in close proximity to the FTM and its support rail during laser welding and cutting. The magnets may be arranged with like poles disposed about the laser beam exit aperture or with the magnetic poles arranged in an alternating manner, which latter arrangement provides somewhat broader magnetic field coverage, for collecting and preventing small metallic particles produced during welding and cutting from becoming attached to and obstructing the apertures in the FTM.