Patent ID: 11890784
Assignee: ANHEUSER-BUSCH INBEV S.A.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 18:
19. A preform for blow-moulding a dispensing bag-in-container, comprising:
an inner layer and an outer layer joined at least at a neck region by an interface that extends at least partly between the inner layer and the outer layer, the interface being in fluid communication with atmosphere by a plurality of interface vents disposed at, distributed around, and oriented coaxially with, a mouth of the preform defined by the neck region, wherein the preform forms a two layer container upon blow-moulding, and wherein the thus obtained inner layer of said container releases from the thus obtained outer layer upon introduction of a pressurised gas through the plurality of interface vents, wherein the inner and outer layers are the same material.