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. 22, 1977
Filed:
Mar. 10, 1975
Kakuichiro Hosokoshi, Neyagawa, JA;
Hikoshi Yamamoto, Takatsuki, JA;
Masayuki Tanaka, Takatsuki, JA;
Shinichi Omura, Nagaokakyo, JA;
Matsushita Electronics Corporation, Osaka, JA;
Abstract
A light exposing apparatus for use in forming a phosphor screen of a color cathode ray tube is disclosed in which a control means is connected to a movable platform for relatively moving a light sensitive film mounted on an inner surface of a face panel relative to an exposing light source facing said light sensitive film with a shadow mask interleaved therebetween. An electrical signal is supplied to said control means each time the accumulated value of ultraviolet ray emitted from said light source reaches a predetermined value, and said movable platform is moved lengthwise of slots in said shadow mask depending on the magnitude of said electrical signal during the light exposing process.