Tube made of a plastic material

Abstract

The tube exhibits a lower part ( 1 a ), which is open for introduction of a product and closable after the introduction, and an upper part ( 1 b ) which exhibits a passage-hole ( 2 ) for exit of the product from the tube. The upper part ( 1 b ) comprises an opening ( 3 ), which is larger than the passage-hole ( 2 ) and arranged in a zone of the upper part ( 1 b ) in which the passage-hole ( 2 ) is to be made. A reducer element ( 4 ) sealingly fits in the opening ( 3 ) and exhibits the passage-hole ( 2 ).

1 - 9 . (canceled)  
   
   
       10 . An improved tube made of a plastic material, comprising a lower part ( 1   a ) which is open for introduction of a product and closable after the introduction, and an upper part ( 1   b ) which exhibits a passage-hole ( 2 ) for exit of the product from the tube, the upper part ( 1   b ) comprising an opening ( 3 ), which is larger than the passage-hole ( 2 ) and is arranged in a zone of the upper part ( 1   b ) in which the passage-hole ( 2 ) is to be made; the tube comprising a reducer element ( 4 ) in which the passage-hole ( 2 ) is made, which reducer element ( 4 ) is conformed and arranged in order to fit sealingly in the opening ( 3 ); characterised in that it comprises a threaded mouth ( 1   c ) having a cylindrical shape and onto which a closure cap is screwed, at which threaded mouth ( 1   c ) the opening ( 3 ) is afforded, the reducer element ( 4 ) comprising a disc ( 4   b ) which rests superiorly on the threaded mouth when the reducer element ( 4 ) is fitted into the opening ( 3 ), the reducer element ( 4 ) comprising a film ( 5 ) which is heat-welded onto an upper part of the disc ( 4   b ) in order to close the passage-hole ( 2 ).  
   
   
       11 . The tube of  claim 10 , wherein: the opening ( 3 ) has a circular section and is made on a perpendicular plane to an axis of the tube; the reducer element ( 4 ) comprises an external ring ( 4   a ) which fits into the opening ( 3 ); the passage-hole ( 2 ) is arranged concentrically to the external ring ( 4   a ).  
   
   
       12 . The tube of  claim 11 , comprising a pressure-fit cap ( 6 ) provided with a stalk ( 6   a ) which sealingly inserts into the passage-hole ( 2 ), wherein the reducer element ( 4 ) comprises: an annular crown ( 4   c ) which rests on an internal wall of the upper part of the tube when the reducer element ( 4 ) fits into the opening ( 3 ); an internal ring which is concentric to the external ring ( 4   a ), and which defines the passage-hole ( 2 ) and is destined to house the stalk ( 6   a ).  
   
   
       13 . The tube of  claim 10 , wherein the upper part ( 1   b ) of the tube is made by injection moulding.  
   
   
       14 . The tube of  claim 10 , wherein the lower part ( 1   a ) and the upper part ( 1   b ) of the tube are made in a single piece by injection moulding.  
   
   
       15 . The tube of  claim 12 , wherein the pressure-fit cap ( 6 ) is made of a material which is different to and harder than a remaining part of the tube; the reducer element ( 4 ) being made of a same material as the remaining part of the tube.  
   
   
       16 . The tube of  claim 15 , wherein the pressure-fit cap ( 6 ) is made of polypropylene; the remaining part of the tube and the reducer element ( 4 ) are made of polyethylene.  
   
   
       17 . The tube of  claim 10 , comprising a pressure-fit cap ( 6 ) provided with a stalk ( 6   a ) which sealingly inserts in the passage-hole ( 2 ), wherein: the pressure-fit cap ( 6 ) is made of a material which is different to and harder than a material used for a remaining part of the tube and is made by multiple injection-moulding of different plastic materials in a single piece with the remaining part of the tube.