Method of fabricating a cathode-ray tube and an improved electron gun electrode member for a cathode-ray tube fabricated by this method

(19)

(11)

EP 0 045 547 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	23.06.1982 Bulletin 1982/25

(43)	Date of publication A2:
	10.02.1982 Bulletin 1982/06

(21)	Application number: 81200833

(22)	Date of filing: 21.07.1981

(84)	Designated Contracting States:
	DE FR GB IT

(30)

Priority:

04.08.1980 US 175165

(71)	Applicant: Philips ECG Inc.
	()

(72)	Inventors:
	Collins, Floyd Keith () Say, Donald Leroy ()

(54)	Method of fabricating a cathode-ray tube and an improved electron gun electrode member for a cathode-ray tube fabricated by this method

(57) An electron gun electrode is provided with an improved beam shaping region having an elongated recess coined in the upper electrode surface and an opposed coined depression in the lower surface. The double coining fabrication method assures a sharp perimetrical edge about at least the central portion of the recesss, such being an important influence in achieving improved beam shaping lensing.

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