Plastic two-piece dosing cap

Abstract

A two-piece dosing cap ( 10 ) comprised of a base part ( 2 ) and a closure part ( 3 ). Both parts ( 2 and 3 ) can be displaced in relation to one another in the axial direction by means of suitable threads ( 20, 30 ). Above a cylindrical part ( 22 ), the base part ( 2 ) has a head part ( 23 ) comprising an outer wall ( 24 ), which is closed on top by a top surface ( 25 ). A plurality of outlet orifices ( 21 ) is integrally formed in the outer wall ( 24 ). The closure part ( 3 ) includes a mirror-inverted truncated cone ( 33 ), the outer wall ( 34 ) of which is completely closed, and therefore rests in the closed state with the interior surface thereof on the exterior surface of the outer wall ( 24 ) of said base part ( 2 ). Both parts comprise sealing means which are matched to one another.

1 . A plastic two-piece dosing cap ( 1 ) for solid or flexible containers, comprised of a base part ( 2 ) which can be mounted on the receptacle and a closure part ( 3 ) held thereon so as to be movable in a screw-like fashion, wherein the two parts ( 2 ,  3 ) can be displaced relative to one another in the axial direction and can be brought from a closed position to an open position and vice versa by means of the screw-like movement, wherein the base part ( 2 ) has external thread ( 20 ) and at least one outlet orifice ( 21 ) arranged above the same, said closure part having on the other hand interior thread ( 30 ) and a central outlet orifice ( 32 ′), and wherein said base part ( 2 ) comprises a cylindrical region ( 22 ) having external thread ( 20 ) and a head part ( 23 ) having an external contour in the form of a truncated cone above the latter. The head part ( 23 ) has a conical outer wall ( 24 ), which has at least one outlet orifice ( 21 ) and is closed by a top surface ( 25 ) of said head part ( 23 ), said closure part ( 3 ) on the other hand being configured as a mirror-inverted truncated cone ( 33 ) above the interior thread ( 30 ) thereof, which is positioned in a cylindrical section ( 31 ) of said closure part, characterized in that the top surface ( 32 ) of the truncated cone ( 33 ) is at least approximately completely open and in the closed state, the conical exterior surface of the outer wall ( 24 ) of said base part ( 2 ) and a conical interior surface ( 32 ) of said closure part ( 3 ), which likewise comprises a conical outer wall ( 34 ), come to rest in a sealing manner one on top of the other, wherein the conical outer wall ( 34 ) of said closure part ( 3 ) is bent toward the center on the upper edge thereof and the closed top surface ( 25 ) of said base part ( 2 ) has a shoulder ( 28 ) extending toward the center, wherein the bend ( 36 ) on the upper edge ( 35 ) rests in a sealing manner against the vertical section of the shoulder ( 28 ) in the closed state of the dosing cap. 
     
     
         2 . A dosing cap according to  claim 1 , characterized in that the at least one outlet orifice ( 21 ) extends approximately over the entire height of the outer wall ( 24 ), which is shaped like a truncated cone. 
     
     
         3 . A dosing cap according to  claim 2 , characterized in that the base part has at least three outlet orifices ( 21 ) and said orifices make up at least 50% of the surface area of the conical outer wall ( 24 ). 
     
     
         4 . A dosing cap according to  claim 1 , characterized in that a sealing bead ( 37 ) is integrally formed on the upper edge ( 35 ) and a mirror-inverted sealing groove ( 29 ), in which the sealing bead ( 37 ) engages in the closed state of the cap ( 1 ), extends in the vertical section of the shoulder ( 28 ). 
     
     
         5 . A dosing cap according to  claim 1 , characterized in that a sealing groove is formed in the bend ( 36 ) of the upper edge ( 35 ) and a sealing bead is integrally formed on the vertical section of the shoulder ( 28 ), said sealing bead engaging in a sealing manner in the sealing groove in the closed state of the dosing cap ( 1 ). 
     
     
         6 . A dosing cap according to  claim 1 , characterized in that sealing beads ( 38 ) are disposed on the inner surface of the conical outer wall ( 34 ) of the closure part ( 3 ), said sealing beads being dimensioned in form and size in such a way that in the closed state of the dosing cap ( 1 ), said sealing beads rest so as to encircle the edges of the outlet orifices ( 21 ) in a sealing manner. 
     
     
         7 . A dosing cap according to  claim 1 , characterized in that the base part ( 2 ) comprises a circumferential, outwardly directed flange ( 26 ), which is adjoined at the end thereof by the cylindrical region ( 22 ). 
     
     
         8 . A dosing cap according to  claim 7 , characterized in that a circumferential retaining collar ( 27 ) is integrally formed on the base part below the exterior thread ( 20 ) and spaced apart from the flange ( 26 ). 
     
     
         9 . A dosing cap according to  claim 8 , characterized in that at least one retaining hook ( 39 ) connected to the outer wall ( 34 ) of the closure part ( 3 ) is integrally formed thereon, said retaining hook catching on the retaining collar ( 27 ) in a maximum open position of the dosing cap ( 1 ). 
     
     
         10 . A dosing cap according to  claim 9 , characterized in that in the cylindrical region ( 31 ) of the closure part ( 3 ), recesses ( 40 ) are provided in the outer wall, in which downwardly extending spring tongues ( 41 ) are molded, on which the retaining hook ( 39 ) is integrally formed. 
     
     
         11 . A dosing cap according to  claim 1 , characterized in that the cylindrical section ( 31 ) of the closure part is provided with means ( 42 ) for increasing adhesion. 
     
     
         12 . A dosing cap according to  claim 11 , characterized in that the exterior surface of the cylindrical section is polygonal shaped. 
     
     
         13 . A dosing cap according to  claim 1  for use on plastic collapsible bags.