EP 1231000 A3 20030115 - Method for the production of a tubular intermediate-product from spring steel material
Title (en)
Method for the production of a tubular intermediate-product from spring steel material
Title (de)
Verfahren zum Herstellen eines hülsenförmigen Zwischenprodukts aus Federstahlgewirk
Title (fr)
Procédé pour la fabrication d'un produit intermédiaire en tissu d'acier à ressorts
Publication
Application
Priority
DE 10106595 A 20010209
Abstract (en)
[origin: EP1231000A2] Process used for manufacturing a sleeve-like intermediate product (22-1, 22-2) from knitted spring steel comprises cutting a tube (12) of knitted spring steel laid flat to form a two-layered knitted strip (16) perpendicular to the longitudinal direction of the tube and molding the resulting two-layered knitted component (20) into the sleeve-like intermediate product. The knitted component is bent to form the sleeve-shape so that the cut edges or the fold lines of the knitted component lie directly adjacent to each other and can be joined together. Preferred Features: The cut edges or the fold lines are joined together on the application of radial force.
IPC 1-7
IPC 8 full level
B21F 33/00 (2006.01); B21F 45/00 (2006.01)
CPC (source: EP)
B21F 33/00 (2013.01); B21F 33/007 (2013.01); B21F 45/00 (2013.01)
Citation (search report)
- [A] DE 3717204 A1 19881215 - BAUMANN GOTTFRIED [DE]
- [A] US 5289853 A 19940301 - SCHAEFER LOTHAR [DE]
- [A] US 5849054 A 19981215 - FUJISAWA KATSUHIDE [JP]
- [A] US 2405725 A 19460813 - YORK OTTO H
- [A] US 3973717 A 19760810 - JENSEN THOMAS H
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1231000 A2 20020814; EP 1231000 A3 20030115; DE 10106595 A1 20020822
DOCDB simple family (application)
EP 02002859 A 20020208; DE 10106595 A 20010209