(19)
(11) EP 1 439 562 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.02.2006 Bulletin 2006/05

(43) Date of publication A2:
21.07.2004 Bulletin 2004/30

(21) Application number: 04380004.4

(22) Date of filing: 09.01.2004
(51) International Patent Classification (IPC): 
H01J 9/30(2006.01)
 H01J 5/54(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 15.01.2003 ES 200300084

(71) Applicant: Vitri Electro-Metalurgica S.A.
08029 Barcelona (ES)

(72) Inventors:
  • Lasso Lucea, Josep F.
    08570 Torello (Barcelona) (ES)
  • Castillo Martin, Alex
    08570 Torello (Barcelona) (ES)
  • Calderer Santanach, Josep
    08570 Torello (Barcelona) (ES)
  • Soler Erra, Maurici
    08550 Lluca (Barcelona) (ES)
  • Vila Peinado, Anna Maria
    08027 Barcelona (ES)
  • Sallent Font, Josep
    08552 Taradell (Barcelona) (ES)
  • Prieto Bassas, David
    08570 Torello (Barcelona) (ES)
  • Manana Cester, Armand
    08570 Torello (Barcelona) (ES)
  • Roura Rodas, David
    08500 Vic (Barcelona) (ES)
  • Calvo Dominguez, M. Angel
    08500 Vic (Barcelona) (ES)

(74) Representative: Curell Aguilà, Marcelino et al
Dr. Ing. M. Curell Sunol I.I. S.L. Agentes de la Propiedad Industrial Passeig de Gracia, 65 bis
08008 Barcelona
08008 Barcelona (ES)

   


(54) Manufacturing process for electric lightbulb caps


(57) Process for the manufacture of electric lightbulb caps, which comprises the following steps: forming a body of revolution (8) with a base (14), an internal surface (16), and an external surface (18) with a cylindrical segment (20), distanced from the base (14), and which is crowned by an annular protrusion (22), in which the forming step is constituted by an operation of the group formed by injection, extrusion, casting, sintering and machining; obtaining a permanent joined body (4) comprising the body of revolution (8) and a contact plate (6) having a flat annular base (10) and a tubular appendix (12); provision of a sheathing (2) with a lower aperture (24) delimited by a doubling (26) of the sheathing (2) directed towards the interior of the sheathing (2) and whose external surface (28) is cylindrical; and application of the sheathing (2) against the permanent joined body (4).







Search report