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:
Nov. 08, 1983
Filed:
Mar. 24, 1982
Masahiko Nishizawa, Mobara, JP;
Takashi Fujimura, Mobara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a method of exposing to light a fluorescent screen of an in-line dot type color picture tube wherein an inner surface of a panel of the tube coated with a photosensitive film, a shadow mask, and a linear type extra-high pressure mercury lamp covered by a shielding plate having an opening are disposed substantially in parallel so as to expose the inner surface of the panel to light passing through apertures of the shadow mask, a plurality of openings are formed in the shield plate with a mutual spacing of n.times.B.sub.p (L/Q) where B.sub.p represents a lateral pitch between adjacent apertures of the shadow mask, L a distance between the mercury lamp and the inner surface of the panel, Q a distance between the shadow mask and the inner surface of the panel, and n a positive integer, and the inner surface of the panel is exposed to light from the plurality of openings through the apertures of the shadow mask.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile