| 摘要 |
A cartridge for the preparation of a beverage consists of a lateral cylindrical surface (S) obtained by rolling of a sheet and welding thereof along a line (L), as well as a top base (T) and a bottom base (B) welded to the cylindrical surface (S) so as to close the apertures at the ends of the latter, both the cylindrical surface (S) and the bases (B, T) being made fro m a flexible and gastight material. In this way a cartridge is obtained with a regular shape and easy to manufacture that not only is cheaper, more efficie nt and more environmentally friendly than prior art cartridges, but it also allows to make a coffee machine that is cheaper, more practical and lighter and can even be totally automatic.
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