Global Patent Index - EP 1063027 A1

EP 1063027 A1 2000-12-27 - METHOD OF PRODUCING PIPES OF RADIAL CROSS-SECTION

Title (en)

METHOD OF PRODUCING PIPES OF RADIAL CROSS-SECTION

Title (de)

VERFAHREN ZUM HERSTELLEN VON ROHREN MIT RADIALEM DURCHSCHNITT

Title (fr)

PROCEDE PERMETTANT DE PRODUIRE DES TUBES A COUPE RADIALE

Publication

EP 1063027 A1 (EN)

Application

EP 99959950 A

Priority

  • JP 9907190 W
  • JP 36362798 A

Abstract (en)

In a method of manufacturing a radial cross section pipe, in order to easily form a fold portion along a desired range in a direction of a pipe axis so that a level difference between a crest portion and a root portion is great, the same number of first pressing sheets (8) and second pressing sheets (9) are alternately arranged by positioning a pipe material (1) along a fold portion forming area in an axial direction at an outer periphery of the pipe material (1). A radial fold portion (12) is formed by deeply pressing the first pressing sheets (8) in a centripetal direction and shallowly pressing the second pressing sheets (9) in the centripetal direction. <IMAGE>

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

B21D 15/02; B21D 53/06; F28F 1/06

IPC 8 full level (invention and additional information)

B21C 37/16 (2006.01); B21C 37/20 (2006.01); B21D 15/02 (2006.01); B21D 53/06 (2006.01); F16L 11/00 (2006.01); F28F 1/06 (2006.01)

CPC (invention and additional information)

B21D 15/02 (2013.01); B21C 37/16 (2013.01); B21C 37/202 (2013.01)

Citation (search report)

See references of WO 0037192A1

Designated contracting state (EPC)

DE FR GB IT

EPO simple patent family

WO 0037192 A1 20000629; EP 1063027 A1 20001227; JP 2000190029 A 20000711; JP 3066366 B2 20000717

INPADOC legal status


2003-01-29 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020702

2000-12-27 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000821

2000-12-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB IT