Pouch reservoirs for casing used to dispense pressurized products and casings comprising same

1. A pouch reservoir, for a pressurized dispensing casing, comprising a dome, a valve carrying cup and a pouch, wherein the dome comprises a base, for watertight attachment of a neck of the pouch, an external surface of the base, receiving an inner wall of the neck of the pouch, said dome comprising further a bowl to receive the valve carrying cup above the base, the base and the bowl being of an unitary construction and in communication by a central hole for refill of the pouch and exit of the product, wherein the bowl is provided by a peripheral wall extending under and above the dome, and wherein said peripheral wall is provided with a projecting edge forming a crimping bead for a collar of the valve carrying cup.

2. The pouch reservoir as claimed in claim 1 wherein the external surface of the base is formed by a continuous wall on which the inner wall of the neck of the pouch is attached, the continuous wall having a circular central section and lateral tapering extensions to provide a tight gluing surface for the pouch.

3. The pouch reservoir as claimed in claim 1 comprising an anti-collapse device for the pouch.

4. The pouch reservoir as claimed in claim 3 wherein the anti-collapse device comprises a plunger element which is inserted into the pouch and a retaining plate received in the bowl.

5. The pouch reservoir as claimed in claim 4 wherein said plunger element has two distant and laterally staggered blades.

6. The pouch reservoir as claimed in claim 5 wherein said blades have complementary stop profiles keeping the blades out of contact with each other.

7. The pouch reservoir as claimed in claim 4 wherein said retaining plate is mounted forcefitted in the bottom of the bowl.

8. The pouch reservoir as claimed in claim 1 constituting a refill for a refillable dispensing casing.

9. A pressurized dispensing casing having a pouch reservoir as claimed in claim 1 and a casing body receiving the pouch of the pouch reservoir, wherein the dome is provided with a peripheral support collar, wherein said body of said casing comprises an edge, said peripheral support collar being received on said edge, said casing comprising further a bushing for clamping the dome to the body of the casing, said bushing being provided with an annular support surface in tight contact against the peripheral collar of the dome and the edge of the body of the casing.

10. A method of producing a pouch reservoir, for a pressurized dispensing casing, said pouch reservoir comprising a dome, a valve carrying cup and a pouch, wherein the dome comprises a base, for watertight attachment of a neck of the pouch, an external surface of the base, receiving an inner wall of the neck of the pouch, and comprises a bowl above the base to receive the valve carrying cup, the base and the bowl being of an unitary construction and in communication by a central hole for refill of the pouch and exit of the product, wherein the bowl is provided by a peripheral wall extending under and above the dome, and wherein said peripheral wall is provided with a projecting edge forming a crimping bead for a collar of the valve carrying cup, said method comprising:

step of gluing or welding of the pouch to an external surface of the base beneath the dome,

a step of filling the pouch assembled with the dome with the product to be dispensed through the bowl and the central hole,

a step of crimping the collar of the valve carrying cup in place on said bead of the dome with the already filled pouch attached to the dome.

11. A method of producing a pouch reservoir as claimed in claim 10 wherein the dome provides a holding element for the reservoir on a station of a pouch filling machine during the filling of the pouch.

12. A method of producing a pouch reservoir as claimed in claim 10 wherein the cup is crimped on the dome at a station of a pouch filling machine after said filling occurs.