Spray Head for Fluid Product

Abstract

A fluid spray head comprising an expulsion channel provided with a spray orifice ( 1 ) and a spray profile ( 10 ) formed in an end wall of said expulsion channel, said spray profile ( 10 ) comprising non-radial spray channels ( 11 ) opening out to a central spray chamber ( 12 ) disposed directly upstream from said spray orifice ( 1 ), the central axis (X) of said spray orifice ( 1 ) being offset from the central axis (Y) of the spray chamber ( 12 ) by a distance that is less than 0.12 mm, and preferably less than 0.08 mm.

1 . A fluid spray head comprising an expulsion channel provided with a spray orifice ( 1 ) and a spray profile ( 10 ) formed in an end wall of said expulsion channel, said spray profile ( 10 ) comprising non-radial spray channels ( 11 ) opening out to a central spray chamber ( 12 ) disposed directly upstream from said spray orifice ( 1 ), the spray head being characterized in that the central axis (X) of said spray orifice ( 1 ) is offset from the central axis (Y) of the spray chamber ( 12 ) by a distance that is less than 0.12 mm, and preferably less than 0.08 mm.  
   
   
       2 . A spray head according to  claim 1 , in which said spray chamber ( 12 ) has a diameter of 1 mm.  
   
   
       3 . A spray head according to  claim 1 , in which said spray orifice ( 1 ) has a diameter of 0.3 mm.  
   
   
       4 . A set of spray heads manufactured from a common mold cavity, the set being characterized in that said heads are made according to  claim 1 .  
   
   
       5 . A set according to  claim 4 , in which the standard deviation of the offset of the central axis (X) of the spray orifice ( 1 ) relative to the central axis (Y) of the spray chamber ( 12 ) for all of the spray heads coming from a common mold cavity is less than 0.03 mm, and advantageously less than 0.01 mm.  
   
   
       6 . A fluid dispenser device characterized in that it includes a spray head according to  claim 1 .  
   
   
       7 . A machine for manufacturing a spray head according to  claim 1 , the machine including at least one mold provided with at least one mold cavity of said head, said machine being characterized in that it includes a core pin ( 100 ) for each mold cavity, the front face of said pin ( 100 ) incorporating a profile ( 110 ) that is complementary to the spray profile ( 10 ) of the head, said complementary profile ( 110 ) being made up of projections forming non-radial channels ( 11 ) and the spray chamber ( 12 ), said pin ( 100 ) further incorporating a punch ( 120 ) so as to form the dispenser orifice ( 1 ).  
   
   
       8 . A machine according to  claim 7 , in which said punch ( 120 ) is removable from said pin ( 100 ), making it possible to replace said punch ( 120 ) without having to change the pin ( 100 ).  
   
   
       9 . A machine according to  claim 8 , in which said punch ( 120 ) is secured to a needle ( 130 ) that extends longitudinally inside the pin ( 100 ) over a substantial fraction of its length.