B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 39/02 (2006.01) F16L 9/17 (2006.01) F16L 23/00 (2006.01)
Patent
CA 2691631
A ductmaking apparatus bends a metal web to form a duct blank having a lock seam with male and female portions. Prior to shearing off the duct blank, the apparatus bends the web to form a lock tab that secures the lock seam during subsequent handling of the duct blank.
La présente invention concerne un appareil de fabrication de conduites assurant le cintrage d'une bande métallique continue pour former une ébauche de conduite comportant un joint enclenché avec des parties mâle et femelle. Préalablement au cisaillement de l'ébauche de conduite, l'appareil cintre la bande continue pour former une attache de verrouillage qui maintient le joint enclenché lors du traitement ultérieur de l'ébauche de conduite.
Borwig Michael C.
Shea Christopher
Swenson Peter
Formtek,inc.
Gowling Lafleur Henderson Llp
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