Global Patent Index - EP 0788849 B1

EP 0788849 B1 2001-05-02 - METHOD OF MANUFACTURING A PIPE WITH SECTIONS OF DIFFERING WALL THICKNESS AND A PIPE WITH SECTIONS OF DIFFERING WALL THICKNESSES

Title (en)

METHOD OF MANUFACTURING A PIPE WITH SECTIONS OF DIFFERING WALL THICKNESS AND A PIPE WITH SECTIONS OF DIFFERING WALL THICKNESSES

Title (de)

Verfahren zur Herstellung von Rohren mit Abschnitten unterschiedlicher Wanddicke

Title (fr)

METHODE DE FABRICATION D'UN TUBE AYANT LES SECTIONS DE PAROI D'EPAISSEURS DIFFERENTS ET UN TUBE AYANT SECTIONS DE PAROI D'EPAISSEURS DIFFERENTS

Publication

EP 0788849 B1 (DE)

Application

EP 97101611 A

Priority

DE 19604357 A

Abstract (en)

[origin: EP0788849A1] The process is used to make tubes with sections of different wall thickness from a metal sheet (1) which is initially flat. The sheet is first deformed by rolling, in order to form regions which have different thicknesses (S2,S3,S4,S5) in the direction of rolling. The rolled sheet is then cut to size, and is reshaped into a tube, before joining the butting edges. It may also be divided prior to the reshaping stage, into strips which are parallel to the direction of rolling, after which the reshaping and joining processes may be carried out.

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

B21C 37/16; B21C 37/15

IPC 8 full level (invention and additional information)

B21C 37/08 (2006.01); B21C 37/15 (2006.01)

CPC (invention and additional information)

B21C 37/0803 (2013.01); B21C 37/065 (2013.01); B21C 37/15 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT PT SE

EPO simple patent family

EP 0788849 A1 19970813; EP 0788849 B1 20010502; DE 19604357 A1 19970814; DE 19604357 B4 20040624; ES 2157493 T3 20010816; PT 788849 E 20010830; US 5924316 A 19990720

INPADOC legal status


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2002-04-24 [26N] NO OPPOSITION FILED

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-09-14 [ET] FR: TRANSLATION FILED

2001-08-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2157493 T3

2001-06-11 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: BARZANO' E ZANARDO ROMA S.P.A.

2001-06-07 [REF] CORRESPONDS TO:

- Document: DE 59703455 20010607

2001-05-23 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20010502

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1997-11-19 [17Q] FIRST EXAMINATION REPORT

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