(19)
(11) EP 0 273 884 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.01.1989 Bulletin 1989/04

(43) Date of publication A2:
06.07.1988 Bulletin 1988/27

(21) Application number: 87830454.2

(22) Date of filing: 21.12.1987
(51) International Patent Classification (IPC)4: H01J 29/94, H01J 7/18, H01J 9/39
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 22.12.1986 IT 2280886

(71) Applicant: SAES GETTERS S.P.A.
I-20151 Milano (IT)

(72) Inventor:
  • Martelli, Daniele
    I-20100 Milano MI (IT)

(74) Representative: Adorno, Silvano et al
c/o SOCIETA' ITALIANA BREVETTI S.p.A. Via Carducci, 8
20123 Milano
20123 Milano (IT)


(56) References cited: : 
   
       


    (54) Device and composition for liberating nitrogen gas during the manufacture of a cathode ray tube


    (57) There is described a composition able to liberate nitrogen gas during the manufacture of a cathode ray tube and in particular to control the release of this gas after its heating in the atmosphere. This composition comprises Fe₄N, Ni and Al in the form of powders preferably in certain weight ratios. There is further described the preferred particle size distributions of the three components. There is further described a preferred form of capsule, for the release of nitrogen gas, containing said composition.







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