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

Claim 0:
1. A preform for blow-moulding a bag-in-container, comprising:
an inner layer and an outer layer, 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 gas at at least one point of interface between the two layers, wherein the inner and outer layers are the same material;
wherein the preform comprises a mouth defined in a neck region, the mouth comprising a circumferentially-extending lip which defines an axially outer surface of the preform; and
wherein the at least one point of the interface is a vent disposed at, and oriented coaxially with, the mouth, the vent extending axially from an opening in the axially outer surface of the preform at least partway through the neck region.