A substance for preparation of a beverage contained in a sealed flexible sachet is extracted with a device which provides a chamber formed by two members configured so that they each form a cavity which is substantially one-half of the chamber and so that when brought and fastened together, they...http://www.google.de/patents/US5762987?utm_source=gb-gplus-sharePatent US5762987 - Process for extracting a substance contained in a sachet
