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. 21, 1990
Filed:
Sep. 08, 1988
Takeo Fujimura, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Kyoto, JP;
Abstract
A tensed shadow mask assembly for a cathode ray tube having a phosphor-deposited screen, which comprises a generally rectangular perforated plate having four corners and correspondingly four peripheral edge portions and a four-sided frame member similar in shape to the contour of the perforated plate having four fitting faces to which the respective peripheral edge portions of the perforated plate is rigidly secured while the perforated plate is held under tension. The perforated plate is generally scalloped with respect to the center thereof such that corners of the perforated plate occupy respective positions on one side away from an imaginary plane touching the center of the perforated plate and being perpendicular to the longitudinal sense of the cathode ray tube, while substantially intermediate region of peripheral edge positions between the neighboring corners occupy respective positions on the other side away from the imaginary plane.