(19)
(11) EP 1 090 700 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.05.2002 Bulletin 2002/20

(43) Date of publication A2:
11.04.2001 Bulletin 2001/15

(21) Application number: 99120154.2

(22) Date of filing: 08.10.1999
(51) International Patent Classification (IPC)7: B21D 5/08, B21D 53/04, B21C 37/08
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(71) Applicant: Calsonic Kansei Corporation
Tokyo (JP)

(72) Inventors:
  • Akutsu, Tomoaki, c/o CALSONIC KANSEI CORPORATION
    Tokyo 164-8602 (JP)
  • Hirayanagi, Natsuko, c/o CALSONIC KANSEI CORP.
    Tokyo 164-8602 (JP)
  • Obata, Harumi, c/o CALSONIC KANSEI CORPORATION
    Tokyo 164-8602 (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)

   


(54) Formed strip and roll forming


(57) A V-shaped metal strip has a U-shaped bottom having U-shaped inside and outside surfaces. Only the U-shaped inside surface is formed with a plurality of fold lines extending in a longitudinal direction of the strip and reducing the influence of springback. The fold lines may be arranged in a manner of bilateral symmetry with respect to an imaginary median plane bisecting the V-shaped cross section of the metal strip.






Search report