Global Patent Index - EP 1021257 A1

EP 1021257 A1 2000-07-26 - METHOD AND PLANT FOR THE PRODUCTION OF FRUSTOCONICAL PIPES

Title (en)

METHOD AND PLANT FOR THE PRODUCTION OF FRUSTOCONICAL PIPES

Title (de)

VERFAHREN UND ANLAGE ZUR HERSTELLUNG VON KONISCHEN ROHREN

Title (fr)

PROCEDE ET USINE POUR LA FABRICATION DE TUYAUX TRONCONIQUES

Publication

EP 1021257 A1 (EN)

Application

EP 97934493 A

Priority

EP 9703873 W

Abstract (en)

[origin: WO9903611A1] The invention falls within the sector of frustoconical pipes. The pipe (1) to be formed and welded is fed between calibrating rollers (8) at a speed greater than the tangential speed of said calibrating rollers (8) in the zone of tangency with the pipe (1). The central axis of the pipe (1) is kept at a constant level during feeding of the pipe, while the height at which welding is performed varies. The extension of the active profile of the calibrating rollers (8) is less than the length of the pipe (1) to be formed and welded.

IPC 1-7 (main, further and additional classification)

B21C 37/18; B21C 37/08

IPC 8 full level (invention and additional information)

B21C 37/08 (2006.01); B21C 37/18 (2006.01)

CPC (invention and additional information)

B21C 37/185 (2013.01); B21C 37/0803 (2013.01)

Citation (search report)

See references of WO 9903611A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9903611 A1 19990128; AT 212257 T 20020215; AU 3768597 A 19990210; DE 69710102 D1 20020314; EP 1021257 A1 20000726; EP 1021257 B1 20020123

INPADOC legal status


2007-12-31 [BERE] BE: LAPSED

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2005-01-31 [BERE] BE: LAPSED

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