Large tube cover for plunger tube

1. A system for dispensing a fluid product, comprising a device for taking off said product under pressure, said device having a pump in communication with a plunger tube, said system further comprising a tube cover surrounding the plunger tube over at least part of its length, wherein the tube cover is expandable between a shrink state and an expanded state, the width of the tube cover in the expanded state being larger than the width of the tube cover in the shrink state.

2. The system according to claim 1 wherein the tube cover comprises an outer tube provided with an axial slit.

3. The system according to claim 2 , wherein the tube cover comprises means for expanding the outer tube.

4. The system according to claim 3 , wherein the means for expanding the outer tube spread the slit and increase the width of the outer tube.

5. The system according to claim 4 , wherein the tube cover comprises a collar to accommodate a neck of a container, the outer tube being directly linked to the collar by means of a rigid bridge.

6. The system according claim 5 , wherein said means for expanding the outer tube are arranged between the outer tube and the collar.

7. The system according to claim 6 , wherein said means for expanding the outer tube are fastened to a surface of the outer tube and to a surface of the collar.

8. The system according claim 6 , wherein said means for expanding the outer tube are constrained in the shrink state of the tube cover and said means for expanding the outer tube are free in the expanded state of the tube cover.

9. The system according to claim 5 , wherein the tube cover further comprises an inner tube to accommodate said body.

10. The system according to claim 9 , wherein said means for expanding the outer tube are arranged between the outer tube and the inner tube.

11. The system according to claim 10 , wherein said means for expanding the outer tube are fastened to a surface of the outer tube and to a surface of the inner tube.

12. The system according to claim 10 , wherein said means for expanding the outer tube are constrained in the expanded state of the tube cover and said means for expanding the outer tube are free in the shrink state of the tube cover.

13. The system according to claim 12 , wherein the inner tube is movable with respect to the outer tube between an upright position where the means for expanding are free and a lowered position where the means for expanding are constrained, the displacement of the inner tube between the upright position and the lowered position causing the expansion of the outer tube.

14. The system according to claim 13 , wherein the mounting of the taking off device on the tube cover occurs the displacement of the inner tube from the upright position to the lowered position.

15. The system according claim 3 , wherein said means for expanding the outer tube consist of articulated legs, the tube cover being in the shrink state when the legs, are folded, and the tube cover being in the expanded state when the legs are unfolded and thus deployed.

16. A flask for dispensing a fluid product, comprising:

a reservoir for packaging said product, said reservoir being provided with a neck,

a dispensing system that is mounted on the reservoir, the system comprising a device for taking off said product under pressure, said device having a pump in communication with a plunger tube, said system further comprising a tube cover surrounding the plunger tube over at least part of its length, wherein the tube cover is expandable between a shrink state and an expanded state, the width of the tube cover in the expanded state being larger than the width of the tube cover in the shrink state,

wherein the plunger tube of the dispensing system is disposed in said reservoir, the tube cover of the dispensing system is provided with a collar that accommodates the neck of the reservoir, and the outer tube is inserted into the reservoir.