EP 0156720 B1 19880713 - METHOD AND APPARATUS FOR PERFORATING THE SIDES OF METALLIC, DEEP-DRAWN WORK PIECES
Title (en)
METHOD AND APPARATUS FOR PERFORATING THE SIDES OF METALLIC, DEEP-DRAWN WORK PIECES
Publication
Application
Priority
FR 8403799 A 19840313
Abstract (en)
[origin: ES8607072A1] The present invention relates to a process and a device for perforating a metallic piece of elongated shape and with straight generatrix, with a view to obtaining, in several successive passes, a pattern which extends over a considerable part of the length of said generatrix and which is constituted by a large number of adjacent perforations in the lateral wall of this piece, said process consisting in repeating at least one elementary pattern which comprises a part of said perforations and which extends over the whole height of the pattern to be made. According to the invention, this elementary pattern is made in one pass, two adjacent elementary patterns being made during different passes. The invention is more particularly applicable to the precision-production of technical and decorative perforations.
IPC 1-7
IPC 8 full level
B21D 28/28 (2006.01); B21D 28/34 (2006.01)
CPC (source: EP US)
B21D 28/28 (2013.01 - EP US); Y10T 83/388 (2015.04 - EP US); Y10T 83/402 (2015.04 - EP US); Y10T 83/5796 (2015.04 - EP US); Y10T 83/8748 (2015.04 - EP US); Y10T 83/8841 (2015.04 - EP US); Y10T 83/944 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH DE GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0156720 A1 19851002; EP 0156720 B1 19880713; AT E35636 T1 19880715; CA 1235370 A 19880419; DE 3563700 D1 19880818; ES 541230 A0 19860601; ES 8607072 A1 19860601; FR 2561143 A1 19850920; FR 2561143 B1 19871224; JP H032568 B2 19910116; JP S617023 A 19860113; US 4669345 A 19870602
DOCDB simple family (application)
EP 85400460 A 19850311; AT 85400460 T 19850311; CA 476239 A 19850311; DE 3563700 T 19850311; ES 541230 A 19850313; FR 8403799 A 19840313; JP 4807885 A 19850311; US 70970785 A 19850308