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Machine translation
1. (WO1983003784) METHOD FOR MAKING CLOSED GROOVES AND BODY OBTAINED THEREBY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1983/003784    International Application No.:    PCT/CH1983/000049
Publication Date: 10.11.1983 International Filing Date: 21.04.1983
IPC:
B21D 13/02 (2006.01)
Applicants: ZSCHOKKE WARTMANN AG [CH/CH]; Stahlrain, CH-5200 Brugg (CH) (For All Designated States Except US).
KNOBEL, Robert [CH/CH]; (CH) (For US Only)
Inventors: KNOBEL, Robert; (CH)
Agent: DR. A.R. EGLI & CO.; Horneggstrasse 4, CH-8008 Zürich (CH)
Priority Data:
2666/82-6 30.04.1982 CH
Title (EN) METHOD FOR MAKING CLOSED GROOVES AND BODY OBTAINED THEREBY
(FR) PROCEDE DE FABRICATION DE CANNELURE FERMEES ET CORPS OBTENU PAR LE PROCEDE
Abstract: front page image
(EN)Before forming the groove (5) between two clamps (1, 2), the strip of material (3) is provided with a transverse notch (8) at the site where the groove head is intended to be formed. The notch allows to decrease the force (F¿k?) and the pressure (P¿k?) required to fold the material. Furthermore, said notch decreases the corrosion sensitivity of the groove head (7).
(FR)Avant la formation de la cannelure (5) entre deux pinces (1, 2), la bande de matière (3) est munie d'une encoche transversale (8) à l'endroit destiné à constituer la tête de la cannelure. La présence de cette encoche a pour effet de diminuer la force (F¿k?) et la pression (P¿k?) nécessaires pour plier le matériau. En outre, cette encoche diminue la sensibilité à la corrosion de la tête (7) de la cannelure.
Designated States: JP, SU, US.
European Patent Office (AT, DE, FR, GB).
Publication Language: German (DE)
Filing Language: German (DE)