(19)
(11) EP 2 050 521 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.10.2010 Bulletin 2010/40

(43) Date of publication A2:
22.04.2009 Bulletin 2009/17

(21) Application number: 08166817.0

(22) Date of filing: 16.10.2008
(51) International Patent Classification (IPC): 
B21D 28/06(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 18.10.2007 IT MI20072016

(71) Applicant: Donatiello, Gaetano
20035 Lissone (Milano) (IT)

(72) Inventor:
  • Donatiello, Gaetano
    20035 Lissone (Milano) (IT)

(74) Representative: Martegani, Franco et al
Franco Martegani S.r.l. Via Carlo Alberto, 41
20052 Monza (Milano)
20052 Monza (Milano) (IT)

   


(54) An apparatus and a method for cold shearing discoid preforms from a metal strip


(57) A method for cold shearing from a metal strip (12) a succession of at least two discoid preforms (11, 11', 11") made along at least two parallel rows, said at least two discoid preforms (11, 11', 11") having at least one inner tangent point (18, 18') between at least said rows and at least two outer tangent points (19, 19') with the lateral portions of said metal strip (12), characterised in that it achieves the step of cutting said metal strip (12) along at least two polygons (14, 14', 14") circumscribing said at least two discoid preforms (11, 11', 11"), wherein said at least two polygons (14, 14', 14") comprise at least one side (15, 15') comprising said at least one inner tangent point (18, 18") and at least two sides (16, 16') comprising said at least two outer tangent points (19, 19') and coinciding with said lateral portions of said metal strip (12).







Search report