(19)
(11) EP 0 397 919 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.04.1991 Bulletin 1991/16

(43) Date of publication A2:
22.11.1990 Bulletin 1990/47

(21) Application number: 89121861.2

(22) Date of filing: 27.11.1989
(51) International Patent Classification (IPC)5: B21D 51/36, B21D 51/26
(84) Designated Contracting States:
CH DE ES FR GB GR IT LI NL SE

(30) Priority: 16.05.1989 JP 122470/89

(71) Applicant: Soudronic AG
CH-8962 Bergdietikon (CH)

(72) Inventors:
  • Itoh, Jyoji
    Setagaya-ku Tokyo (JP)
  • Ihara, Shinichi
    Yokohama-shi Kanagawa-ken (JP)


(56) References cited: : 
   
       


    (54) Production apparatus for producing external can of dry element battery


    (57) A production apparatus produces an external can of a dry element battery. The production apparatus comprises a notch forming mechanism (2) supplied with a plate shaped base material (7) which becomes the external can of the dry ele­ment battery for forming notches (7a, 7b, 7c) at predeter­mined positions of the base material, a forming mechanism (4) for forming the base material which is formed with the notches into a cylindrical shape with a joint portion loca­ted at a lower side, a turning mechanism (5) for turning the base material (7) which is formed to the cylindrical shape so that the joint portion faces up, a laser welding unit (6) for irradiating a laser beam from above the turned base material so as to join the joint portion by a laser welding and form the external can of the dry element battery, and a feeding mechanism (10, 15, 25, 40) for successively feeding the base material to the notch forming mechanism, the for­ming mechanism the turning mechanism and the laser welding unit.







    Search report