Patent ID: 8377367

Claim:
A production method to produce a container, the container comprising a substantially external rigid body and a bag, wherein the substantially external rigid body has a body cavity, the method comprising the steps of: a. providing said substantially external rigid body having a neck defining an opening giving access to the body cavity, b. providing a preform formed of thermoplastic material, the preform comprising a neck from which a flange radially extends, c. heating said preform above the softening point of the thermoplastic material, d. arranging the preform in the body opening, e. feeding into the preform interior a first air jet which inflates the preform to form said bag which at least partially occupies said body cavity, the walls of said bag being urged into contact with the walls defining said body cavity, and f. applying vacuum to the area between the preform and the inner walls of the container interior, to facilitate expansion of the preform to form the bag, at least during the air jet feed.