Patent ID: 8459501

Claim:
A container production method, comprising the steps of: providing an external rigid body having a neck defining an aperture giving access to a cavity of said body; providing a preform formed of thermoplastic material, the preform including a neck from which a flange radially extends; heating the preform above a softening point of the thermoplastic material; arranging the preform in the aperture of the body such that said flange rests on a free edge of the neck of the body; feeding into an interior of the preform a first air jet which inflates the preform to form a bag which at least partially occupies said body cavity, said bag having walls that are urged into contact with walls defining said body cavity; disposing, at least during the feeding step, a lubricant fluid between an external surface of the preform and the walls defining said body cavity, to facilitate sliding of the bag walls along the walls defining said body cavity; and spraying said lubricant fluid on the walls defining said body cavity before inserting the preform into said body cavity.