Metering dispenser

Abstract

For a cost-effective design of a metering dispenser for dispensing a substance ( 12 ), which is poured into a container ( 1 ) that is open at an end face and which can be removed from the container ( 1 ) by means of a pump unit ( 10 ), wherein a piston ( 5 ) is inserted in the container ( 1 ), the piston ( 5 ) has smaller dimensions than the inner contour of the container ( 1 ) and a film ( 5 a ) of the pasty substance ( 12 ) is provided in order to seal between the piston ( 5 ) and the inner contour of the container ( 1 ).

1 . A dispenser for the delivery of a substance which is filled in a container being open at an end side and can be removed from the container by a pump unit, wherein a piston is inserted in the container, characterized in that
 the piston ( 5 ) is smaller in size than an inner contour of the container ( 1 ) and a film ( 5   a ) of a pasty substance ( 12 ) is provided for sealing between the piston ( 5 ) and the inner contour of the container ( 1 ).   
     
     
         2 . Dispenser according to  claim 1 , characterized in that the piston ( 5 ) is a ball, inserted into a cylindrical container ( 1 ). 
     
     
         3 . Dispenser according to  claim 1 , characterized in that the piston ( 5 ) has a lateral guide wall or guide ribs. 
     
     
         4 . Dispenser according to  claim 1 , characterized in that the piston ( 5 ) is circumferentially spaced from 0.02 to 0.2 mm by an annular gap ( 15   a ′) from an inner wall of the container ( 1 ). 
     
     
         5 . Dispenser according to  claim 1 , characterized in that the pasty substance ( 12 ) is free of volatile components 
     
     
         6 . Dispenser according to  claim 5 , characterized in that the pasty substance ( 12 ) is a lip care product or lip decoration product. 
     
     
         7 . Dispenser according to  claim 1 , characterized in that the substance ( 12 ) consists of at least 50% of oils and waxes. 
     
     
         8 . Dispenser according to  claim 1 , characterized in that the piston ( 5 ) is first applied as a liquid composition to the substance ( 12 ) and then hardens. 
     
     
         9 . Dispenser according to  claim 8 , characterized in that the piston ( 5 ) shrinks about 1 to 2% as it hardens.