Global Patent Index - EP 0925856 A3

EP 0925856 A3 2000-04-05 - Method for manufacturing an evaporation tube

Title (en)

Method for manufacturing an evaporation tube

Title (de)

Verfahren zur Herstellung eines Verdampferrohres

Title (fr)

Procédé de fabrication d'un tube d'évaporation

Publication

EP 0925856 A3 (DE)

Application

EP 98122877 A

Priority

DE 19757526 A

Abstract (en)

[origin: DE19757526C1] The tube is fabricated from a smooth tube (1'). Helical ribs (2) are formed on the outside by rolling material out of the tube wall, the ribbed tube (1) is rotated, and rising ribs are formed from the smooth tube. During forming, the tube is supported by an internal mandrel (10). After forming, the ribs are upset to form intermediate partially open channels (3). Toothed gear-like upsetting discs (6,7) form a channel cover (3a) in stages by shaping and connecting projections (12a, 12b).

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

B21C 37/20; F28F 1/36

IPC 8 full level (invention and additional information)

B21C 37/20 (2006.01); F28F 1/42 (2006.01); F28F 13/18 (2006.01)

CPC (invention and additional information)

F28F 13/187 (2013.01); B21C 37/207 (2013.01); F28F 1/42 (2013.01); F28F 1/422 (2013.01); Y10T 29/49385 (2013.01)

Citation (search report)

Designated contracting state (EPC)

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

DOCDB simple family

DE 19757526 C1 19990429; EP 0925856 A2 19990630; EP 0925856 A3 20000405; EP 0925856 B1 20020116; US 6067832 A 20000530