| 摘要 |
A capsule (1) for beverages comprises a casing (2) made by forming a sheet of thermoformable plastic material, said casing (2) comprising: a base wall (3) and a side wall (4) defining a cavity (5) suitable for containing an initial product (P) to be combined with a fluid to obtain a final product in the form of a beverage, a first opening (6) of said cavity (5) opposite said base wall (3), an edge (7) extending from said side wall (4) and surrounding said first opening (6) and a second opening (8) made in said base wall (3). Said first opening (6) is closed hermetically by a closing element (9) fixed to said edge (7), said closing element (9) being perforable by injection means (10) of a dispensing machine in which said capsule is usable. Said second opening (8) is closed hermetically by a closing element (11) suitable for tearing when pressure inside said cavity (5) exceeds a predetermined value. The capsule (1) further comprises a chamber (12) placed opposite the base wall (3) with respect to the cavity (5), said chamber (12) being able to communicate with the cavity (5) through the second opening (8), when the closing element (11) tears, said chamber (12) being provided with an outlet opening (13), made in the centre of a bottom wall (31) opposite the base wall (3). Inside said chamber (12) a damping element (14) is arranged that can communicate with the cavity (5) through the second opening (8), when the closing element (11) tears, said damping element (14) being sized in such a manner as to prevent the occurrence of the water hammer phenomenon at the moment of tearing of the closing element (11), or at least to reduce considerably the intensity of the pressure waves generated by the aforesaid phenomenon, said damping element (14) acting also as a resting element for said closing element (11) when the latter is deformed through the effect of a pressure increase inside the cavity (5). |
