Tube head provided with an air non-return grid

Abstract

The present invention relates to a tube head for product of fluid to pasty consistency comprising a neck having at a first end an opening through which the product is extracted from the tube, a shoulder connected to a second end of the neck opposite the first end, and the tube head comprising an air non-return means placed in said neck, said means being adapted to avoid a return of air from the first end of the neck to the second end of the neck, characterised in that the tube head is one piece.

1 . Tube head for product of fluid to pasty consistency comprising
 a neck having at a first end an opening through which the product is extracted from the tube,   a shoulder connected to a second end of the neck opposite the first end, and the tube head comprising an air non-return means placed in said neck, said means being adapted to avoid a return of air from the first end of the neck to the second end of the neck, characterised in that the tube head is one piece.   
     
     
         2 . Tube head according to  claim 1 , wherein said non-return means are a grid. 
     
     
         3 . Tube head according to the preceding claim, wherein the grid is placed at an intermediate position between the first and the second end of the neck so that, for a neck having a height H, the distance between the grid and the first end of the neck is between H/2 and H. 
     
     
         4 . Tube head according to one of the preceding claims, wherein the grid is placed in a plane substantially perpendicular to an axis of the neck. 
     
     
         5 . Tube head according to one of the preceding claims, wherein the grid comprises at least two orifices of circular section, each of the orifices having a diameter between 0.5 and 2 mm. 
     
     
         6 . Tube head according to the preceding claim, wherein the neck has an internal wall having an axis of symmetry, and the orifices of the grid are spread out in a symmetrical manner in relation to the axis of the neck. 
     
     
         7 . Tube head according to one of the preceding claims, wherein the grid has a thickness of between 0.5 and 1.5 mm. 
     
     
         8 . Tube head according to one of the preceding claims, characterised in that it is made of plastic material. 
     
     
         9 . Tube for product of fluid to pasty consistency comprising a tube head according to one of the preceding claims. 
     
     
         10 . Tube according to  claim 9 , comprising a skirt made of at least one plastic or metallo-plastic material, such as polyethylene or polypropylene. 
     
     
         11 . Method of manufacturing a tube head, said method comprising the following steps:
 a step of injection of the tube head, so as to form a neck having an opening at a first end, a shoulder connected to a second end of the neck opposite the first end, the shoulder splayed from the neck, and an internal wall placed in said neck, so as to block it, the tube head being monolithic,   a step of piercing of said membrane, so as to form at least one opening in said membrane.