EP 0227674 B1 19890531 - METHOD AND DEVICE FOR THE HELICOIDAL WINDING OF SHEET-LIKE MATERIAL
Title (en)
METHOD AND DEVICE FOR THE HELICOIDAL WINDING OF SHEET-LIKE MATERIAL
Publication
Application
Priority
AT 304284 A 19840926
Abstract (en)
[origin: WO8602025A1] When helically winding sheet or band material without core in order to obtain tubes (12) having essentially a square cross-section, the continuously fed band (1) is periodically bent by an inner angle of the cross-section. The band (1) is guided during folding along a convex guiding surface (13) of which the inlet edge is situated in the feed plane of the band. In order to avoid hindering the subsequent feed of the band (1) and of the section already formed of the tube up to the next folding point, the centripetal guiding of the band (1) is interrupted when the outlet edge of the guiding surface (3) is reached.
IPC 1-7
IPC 8 full level
B21C 37/12 (2006.01)
CPC (source: EP US)
B21C 37/121 (2013.01 - EP US); B21C 37/124 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8602025 A1 19860410; AT 382802 B 19870410; AT A304284 A 19860915; AT E43520 T1 19890615; DE 3570612 D1 19890706; EP 0227674 A1 19870708; EP 0227674 B1 19890531; JP S62500439 A 19870226; US 4774827 A 19881004; US 4884426 A 19891205
DOCDB simple family (application)
AT 8500034 W 19850926; AT 304284 A 19840926; AT 85904579 T 19850926; DE 3570612 T 19850926; EP 85904579 A 19850926; JP 50425085 A 19850926; US 14707488 A 19880120; US 19994688 A 19880527