EP 0428355 A2 19910522 - Method and apparatus for forming ducting.
Title (en)
Method and apparatus for forming ducting.
Title (de)
Verfahren und Vorrichtung zur Herstellung von Rohren.
Title (fr)
Procédé et appareil de fabrication de tubes.
Publication
Application
Priority
GB 8925669 A 19891114
Abstract (en)
The present invention provides a method for forming polygonal ducting from an intially circular cross-section duct by radially expanding a mandrel within the duct so as to cause radial deformation of the duct into the desired shape. The invention also provides a mandrel for use in the method of the invention.
IPC 1-7
IPC 8 full level
B21D 15/02 (2006.01)
CPC (source: EP)
B21D 15/02 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0428355 A2 19910522; EP 0428355 A3 19910703; GB 8925669 D0 19900104
DOCDB simple family (application)
EP 90312319 A 19901112; GB 8925669 A 19891114