B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
B21D 22/30 (2006.01) A47J 31/30 (2006.01) B21D 22/00 (2006.01)
Patent
CA 2194530
The present invention relates to a method for making aluminium boiler units for coffee making machines, in particular boiler units having a faceted upwardly tapering side surface. The method comprises the step of drawing an aluminium disc, so as to provide a hollow body, having substantially the configuration of the boiler unit to be made, but provided with a closed top end and an open bottom end. About the top end portion of the hollow body is formed, by a rolling operation, a thread for screw engaging with the top portion of the coffee making machine. Then, by a cutting operation, is removed the metal disc closing the top end portion of the boiler unit body, whereas the bottom end portion thereof is closed by an aluminium bottom element which is clamped to the boiler unit body.
La présente invention a trait à une méthode de fabrication de compartiments de chauffe en aluminium pour cafetières, en particulier de récipients à paroi latérale à facettes s'amenuisant vers le haut. La méthode consiste à emboutir un disque en aluminium de façon à produire un corps creux ayant une configuration essentiellement équivalente à celle du récipient à fabriquer, mais dont le haut est fermé et le fond est ouvert. Autour du bord supérieur du corps creux est formé, par roulage, un filetage qui permet de visser le compartiment de chauffe au compartiment supérieur de la cafetière. Puis, par une opération de coupe, est enlevé le disque de métal qui ferme la partie supérieure du compartiment de chauffe, tandis que le fond du compartiment est fermé par une plaque en aluminium, assujettie par serrage.
Finlayson & Singlehurst
Vev Inox Industria Casalinghi S.r.l.
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