Patent ID: 7556147

Claim:
A package ( 1 ) for the storage of at least two substances in separate chambers, comprising: a first chamber ( 3 ), which contains a flowable first substance ( 5 ), and a second chamber ( 7 ), wherein the first chamber ( 3 ) and the second chamber ( 7 ) are in each case formed from portions, sealed to one another in liquid tight manner, of a base film ( 11 ) and a cover film ( 13 ), the cover film ( 13 ) is a composite film comprising a first barrier foil ( 21 ) of a metallic material and a first sealing layer ( 19 ) formed of at least one polyolefin, the base film ( 11 ) is a composite film comprising a second barrier foil ( 29 ) of a metallic material, wherein the metallic material of the second barrier foil ( 29 ) is softer than that of the first barrier foil ( 21 ), in a zone ( 15 ) connecting the first chamber ( 3 ) and the second chamber ( 7 ), the base film ( 11 ) and the cover film ( 13 ) are sealed to one another in such a manner that, by exerting external pressure on the first chamber ( 3 ), (a) the sealed joint between the films ( 11 , 13 ) breaks selectively in the stated zone ( 15 ), (b) a passage channel ( 25 ) may form between the first and the second chambers and (c) the first substance ( 5 ) may be transferred from the first into the second chamber, and the cover film ( 13 ) has a material weakening in a zone ( 17 ) associated with the second chamber ( 7 ), such that it is more readily pierceable in this zone than in adjacent zones without material weakening, wherein, in addition to the first barrier film ( 21 ) and the first sealing layer ( 19 ), the cover film ( 13 ) further comprises a stabilising film ( 23 ) which has a recess as the material weakening in the zone ( 17 ) associated with the second chamber.