(19)
(11) EP 0 286 948 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.12.1989 Bulletin 1989/49

(43) Date of publication A2:
19.10.1988 Bulletin 1988/42

(21) Application number: 88105412.6

(22) Date of filing: 05.04.1988
(51) International Patent Classification (IPC)4: B22F 7/06, B22F 3/14
// A44C5/00
(84) Designated Contracting States:
CH DE LI

(30) Priority: 08.04.1987 JP 86315/87

(71) Applicants:
  • NAMIKI PRECISION JEWEL CO., LTD.
    Adachi-ku Tokyo 123 (JP)
  • SUMITOMO ELECTRIC INDUSTRIES LIMITED
    Osaka-shi, Osaka 541 (JP)

(72) Inventors:
  • Chiba, Nobutaka
    8-22 Shinden 3-chome Adachi-ku Tokyo (JP)
  • Kikuchi, Youichi Namiki Precision Jewel Co.,Ltd.
    Yuzawa-shi Akita-ken (JP)
  • Matsumara, Hiroshi Namiki Precision Jewel Co.,Ltd.
    Yuzawa-shi Akita-ken (JP)
  • Maruyama, Masao Itami Works
    Itami-shi Hyogo-ken (JP)
  • Seki, Atsushi Itami Works
    Itami-shi Hyogo-ken (JP)
  • Minato, Yoshihiro Itami Works
    Itami-shi Hyogo-ken (JP)
  • Sakata, Toshimitsu Itami Works
    Itami-shi Hyogo-ken (JP)
  • Maeda, Yoshiki Itami Works
    Itami-shi Hyogo-ken (JP)

(74) Representative: Patentanwälte Kirschner & Grosse 
Forstenrieder Allee 59
81476 München
81476 München (DE)


(56) References cited: : 
   
       


    (54) Workpiece for a watch band


    (57) A workpiece for a watch band comprises a worked part (3) to be machined and a base part (2) joined by diffused junction with the worked part (3), which is prepared by a material being superior in machinability to that for the base part (2).







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