Pressure can with modified riser tube

Abstract

A pressure can for dispensing a spray agent may include a container having a container wall and a domed container bottom for receiving the spray agent, a valve for discharging the spray agent when the valve is actuated, and a riser pipe extending from the valve towards the container base and having a lateral surface. A valve-side riser pipe opening may be connected to the valve and arranged on a first end face, and a container-side riser pipe opening open towards the container and arranged on a second end face. The riser pipe may be arranged to conduct the spraying agent from the container-side riser pipe opening to the valve-side riser pipe opening. The riser pipe may extend from the valve closer to the container base than to a container center point.

1 . Pressure can for dispensing a spray agent, wherein the pressure can comprises
 a container having a container wall and a domed container bottom for receiving the spray agent,   a valve for discharging the spray agent when the valve is actuated, and   a riser pipe extending from the valve towards the container base and having a lateral surface, a valve-side riser pipe opening connected to the valve and arranged on a first end face, and a container-side riser pipe opening open towards the container and arranged on a second end face,   wherein the riser pipe is arranged to conduct the spraying agent from the container-side riser pipe opening to the valve-side riser pipe opening, wherein the riser pipe extends from the valve closer to the container base than to a container center point, and wherein the riser pipe has at least one additional opening,   wherein the at least one additional opening of the riser tube is arranged to enlarge an opening cross-section of the riser tube on the container side independently of a filling volume of the pressure can,   characterized in that the at least one additional opening is formed by an incision.   
     
     
         2 . Pressure can according to  claim 1 , characterized in that the at least one additional opening is arranged in the lateral surface of the riser tube. 
     
     
         3 . Pressure can according to  claim 1 , characterized in that the at least one additional opening is arranged at least partially in the lateral surface and the second end face of the riser tube. 
     
     
         4 . Pressure can according to  claim 1 , characterized in that the riser tube has at least two additional openings, and preferably two of the at least two additional openings are arranged diametrically opposite one another at least in some areas. 
     
     
         5 . Pressure can according to  claim 1 , characterized in that the riser tube has more than at least two additional openings, and wherein preferably an angle (α) between two adjacent additional openings measured in the circumferential direction of the riser tube is at least 90°. 
     
     
         6 . Pressure can according to  claim 1 , characterized in that the at least one additional opening extends along the riser tube from the container-side riser tube opening to the valve-side riser tube opening over a length (L 7 ) of less than 40 mm, preferably over a length (L 7 ) of between 5 mm and 30 mm, most preferably over a length (L 7 ) of 15 mm. 
     
     
         7 . Pressure can according to  claim 1 , characterized in that the length (L 7 ) of the at least one additional opening has a ratio of at least 1 to 33 to a total length (L 1 ) of the riser tube. 
     
     
         8 . Pressure can according to  claim 1 , characterized in that the riser tube is formed from an at least partially flexible material, for example plastic, and wherein the container-side riser tube opening is fanned out during the discharge of a spray agent. 
     
     
         9 . Pressure can according to  one of the preceding claims , characterized in that the riser tube has at least one round opening arranged in the lateral surface of the riser tube, and wherein the round opening is preferably arranged between 1.5 cm and 2 cm above an apex of the curved container base. 
     
     
         10 . Pressure can according to  claim 1 , characterized in that the riser tube has a total length (L 1 ) of between 145 mm and 170 mm, preferably a total length of 155 mm, and/or wherein the riser tube has an outer diameter of between 1 mm and 7 mm, preferably between 3 mm and 6 mm, most preferably an outer diameter of 4 mm. 
     
     
         11 . Pressure can according to  claim 1 , characterized in that the pressure can is filled with a propellant and filling material, and wherein the filling material comprises at least one lacquer binder. 
     
     
         12 . Pressure can according to  claim 11 , characterized in that the filling material consists of binder and/or pigments and/or solvent, and wherein the filling material has a density between 0.8 g/l and 3 g/l. 
     
     
         13 . Pressure can according to  claim 1 , characterized in that the container wall and the container base together form a fold, and wherein the container-side riser tube opening is arranged in a region between the fold and the apex of the container base. 
     
     
         14 . Pressure can according to  claim 1 , characterized in that a 2-component system is arranged at least in some regions inside the container, the 2-component system comprising an inner sleeve with a release mechanism, and the release mechanism being set up to permanently open the inner sleeve towards the container. 
     
     
         15 . Pressure can according to  claim 14 , characterized in that the inner sleeve is arranged on a plate and comprises, as part of the release mechanism, a plunger arranged in the inner sleeve for bursting open the inner sleeve, wherein the plunger can be actuated through the plate, wherein the inner sleeve is connected to the plate via a spring cage, the spring cage contains a resiliently mounted trigger, the end of which on the container base side is guided through the plate and which acts on the plunger, which plunger acts against a diaphragm arranged at the valve-side end of the inner sleeve, which diaphragm hermetically seals the inner sleeve at its valve-side end against the contents of the pressure can and is torn open by the plunger when the trigger is actuated, the spring cage being closed on the valve side and the trigger being provided on the base side with a sealing element acting against the inner wall of the spring cage. 
     
     
         16 . Use of the pressure can according to  claim 1  for liquid 2-component systems, in particular 2-component sealing foams, 2-component adhesives or 2-component paints.