Patent ID: 8752731

Claim:
A method for producing a device for dispensing a fluid product under pressure, comprising: an internal reservoir with a variable volume comprising a deformable side wall and a dispensing opening, a valve comprising a body, a stem slidingly mounted in the body between a rest position and an actuation position, and an actuation member mounted on the stem, said valve being suitable for dispensing the pressurized fluid product to outside when the stem is in the actuation position, an external container made of thermoplastic polymer, rigid, of cylindrical shape along an axis and comprising a first closed end and a second end having a single mounting opening, an attachment sleeve made of thermoplastic polymer and comprising a single central orifice, said method comprising the following steps: mounting the body of the valve into the dispensing opening of the internal reservoir, sealingly attaching the attachment sleeve to the internal reservoir, the central orifice of the attachment sleeve being traversed by the stem of the valve, disposing the internal reservoir and the valve inside the external container along the axis through the mounting opening, the actuation member protruding toward the outside relative to the mounting opening, placing the attachment sleeve opposite to and at a distance from the second end of the external container, introducing through the mounting opening a pressurized gas into an internal volume delimited between the internal reservoir and the external container, and subsequently, closing off the mounting opening with the attachment sleeve and welding the attachment sleeve and the external container to one another.