CAPSULE FOR PREPARING A BEVERAGE
The invention relates to a capsule for preparing a beverage, for example coffee, comprising a hollow element intended to contain a metered amount, for example of ground coffee, said hollow element including a side wall, a top wall and a bottom wall comprising an extraction membrane; the top wall comprising, on the inner surface thereof, a weakened area capable of moving when an external element exerts a force thereon, thereby providing a passage for the liquid to flow between the outside and the inside of the capsule
1 . A capsule ( 1 ) for preparing a beverage, for example coffee, comprising a hollow element intended to contain a portion, e.g. of ground coffee, said hollow element comprising a side wall ( 2 ), a top wall ( 3 ) and a bottom wall ( 4 ) comprising an extraction membrane; the top wall ( 3 ) comprising on its internal face a weakened zone ( 11 ) designed to undergo a movement when an external element ( 12 ) applies force to it, thus offering a passage via which liquid can flow between the outside and the inside of the capsule ( 1 ).
2 . The capsule as claimed in claim 1 , in which said weakened zone is in the form of beading the edges of which are of a thickness less than the mean thickness of the top wall.
3 . The capsule as claimed in claim 1 , in which the cross section of the weakened zone is greater than the cross section of said external element.
4 . The capsule as claimed in claim 1 , comprising lateral cavities with which internal protrusions are associated.
5 . The capsule as claimed in claim 1 , comprising elements which reinforce its rigidity.
6 . The capsule as claimed in claim 5 , in which said reinforcing elements are positioned on the top wall of the capsule.
7 . The capsule as claimed in claim 5 , in which said reinforcing elements are positioned on the side wall of the capsule.
8 . A capsule for preparing a beverage, for example coffee, which capsule is made of a biodegradable material containing the following elements: starch (>70%), fibers, proteins, lipids and at least one biodegradable resin.