Patent ID: 6375046
Filing Date: 2002-04-23
Classification: B65D

Abstract:
A method of packaging a substance (L) in liquid or gel form in a reservoir formed by a deformable bag (P) fitted with a valve (1) whose body (11) which defines at least part of a chamber (10) is provided with at least one injection orifice (15) suitable for being closed by an elastically-deformable wall bearing against said body around said orifice, and designed to be enclosed under the pressure of a gas (A) in a hermetic, rigid case (B) by leaving an intermediate volume (V), the method comprising the steps:opening said valve (1) to put the bag (P) into communication with the outside; filling the bag (P) via the valve (1) while the valve is kept open until the level of substance (L) reaches the bottom portion of the body (11); then injecting the gas (A) under pressure into the valve (1) while it is kept in the open position, thereby moving the elastically-deformable wall and uncovering the injection orifice (15) so as to enable the case (B) to be put under pressure; and stopping injection of the gas (A) once the working pressure has been reached and said valve is closed again without putting the chamber (10) into communication with the atmosphere, thus establishing pressure equilibrium on either side of the orifice (15) and enabling said wall to return in leak-proof manner against the injection orifice (15) so that as soon as the valve (1) is first opened, a pressure difference exists between the volume (V) and the chamber (10), thereby enabling said wall to be pressed in leak-proof manner against said orifice (15).