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

Claim 17:
18. 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 partway between the inner layer and the outer layer, the interface being in fluid communication with atmosphere by one or more interface vents disposed at, 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 one or more interface vents to dispense a liquid contained therein, wherein the inner and outer layers are the same material,
wherein the inner and outer layers both define an axially outer surface of the preform.