Method for making aluminium boiler units for coffee making machi

Details Method for making aluminium boiler units for coffee making machi Method for making aluminium boiler units for coffee making machi

1997-01-03

2000-02-22

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Assembling or joining

29416, B23P 1100

Patent

active

060265566

ABSTRACT:
A method for making aluminum boiler units for coffee making machines of the type having a faceted upwardly tapering side surface, comprises a step of drawing an aluminum disc, to provide a hollow body, having substantially the configuration of the boiler unit to be made, 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, the metal disc closing the top end portion of the boiler unit body is removed, whereas the bottom end portion thereof is closed by an aluminum bottom element which is clamped to the boiler unit body.

REFERENCES:
patent: 2089972 (1937-08-01), Lyon
patent: 3552341 (1971-01-01), Lannin
patent: 3973316 (1976-08-01), Maher
patent: 5483813 (1996-01-01), Clark et al.

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