Method and dispenser for mixing and discharging media
The object of the invention is to provide a method and a dispenser in which, compared with known dispensers, the fluid path design is simplified. The dispenser has a medium reservoir ( 19 ) containing a medium to be discharge during one discharge stroke of the dispenser ( 11 ). For this purpose a feed fluid flows through the medium reservoir and discharges the medium through a reservoir discharge opening. For producing a discharge stroke, the dispenser has an actuator ( 25 ), whose actuation at least indirectly leads to an impact spike ( 29 ) penetrating from the outside into the medium reservoir ( 19 ), so as to produce a connection between a pump ( 40 ) for a feed fluid and the medium reservoir. As a result of the pressure of the feed fluid flowing into the medium reservoir, at a point in the medium reservoir ( 19 ) differing from the entry point of the impact spike ( 29 ), an opening is formed.
1. Method for discharging a medium mixture mixed from a first and a second medium ( 36 , 37 ) through a discharge opening ( 15 ) of a dispenser ( 11 ) having
a first chamber ( 16 ) containing the first medium ( 36 );
a second chamber ( 19 , 19 a ) containing the second medium ( 37 ), said second chamber having a discharge closure element ( 22 ) for the second chamber, connected to the discharge opening ( 15 );
a media connecting path between the chambers, said path being initially closed; and
at least one overflow closure element ( 41 ) for the media connecting path, wherein after opening the overflow connecting element the first medium ( 36 ) is caused to flow into the second chamber ( 19 , 19 a ), thereby mixing the first and second medium to create a pressurized media mixture and as a result of the media pressure of the media mixture in the second chamber ( 19 ), opening the discharge closure element ( 22 ), the discharge closure element ( 22 ) including a material weakening ( 42 ), including a predetermined breaking point, a reduced material thickness and a laser perforation in a wall of the second chamber ( 19 ), the material weakening being initiated by piercing the wall by means of an impact spike ( 29 ).
2. Method according to claim 1 , wherein the opening of the overflow closure element ( 41 ) is brought about by exerting pressure on the first chamber.
3. Method for discharging a medium mixture mixed from a first and a second medium ( 36 , 37 ) through a discharge opening ( 15 ) of a dispenser ( 11 ) having
a first chamber ( 16 ) containing the first medium ( 36 );
a second chamber ( 19 , 19 a ) containing the second medium ( 37 ), said second chamber having a discharge closure element ( 22 ) connected to the discharge opening ( 15 ), the discharge closure element being a breakable wall;
a media connecting path between the chambers, said path being initially closed; and
at least one overflow closure element ( 41 ) for the media connecting path, wherein after opening the overflow connecting element the first medium ( 36 ) is caused to flow into the second chamber ( 19 , 19 a ), thereby mixing the first and second medium to create a pressurized media mixture and wherein an impact spike ( 29 ) is used to open the overflow closure element ( 41 ) and thereafter also to initiate opening of the discharge closure element ( 22 ) as a result of piercing the wall with the spike and of bursting due to the media pressure of the media mixture in the second chamber.
4. Method according to claim 3 , wherein the discharge closure element is opened by displacement of a closure member.
5. Dispenser for discharging a media mixture mixed from a first and a second medium ( 36 , 37 ) through a discharge opening ( 15 ) of a dispenser ( 11 ), said dispenser comprising:
an air pump to be operated by an actuator ( 25 ),
a first chamber ( 16 ) containing the first medium ( 36 ),
a second chamber ( 19 , 19 a ) containing the second medium ( 37 ),
a media connecting path between the chambers, said path being closed by an overflow closure element ( 41 ) and discharge closure element ( 22 ), for the second chamber ( 19 , 19 a ), connected to the discharge opening ( 15 ),
an impact spike ( 29 ) connected to and moveable with the actuator to pierce the overflow closure element ( 41 ) and subsequently initiate by piercing the discharge closure element ( 22 ) to open as a result of the piercing and of media pressure in the second chamber ( 19 , 19 a ).
6. Dispenser according to claim 5 , wherein the second chamber ( 19 , 19 a ) is enclosed by a blister with a moulding ( 20 ) and a foil sealing the second chamber.
7. Dispenser for discharging a media mixture mixed from a first and a second medium ( 36 , 37 ) through a discharge opening ( 15 ) of a dispenser ( 11 ) comprising a first chamber ( 16 ) containing the first medium ( 36 ), a second chamber ( 19 , 19 a ) containing the second medium ( 37 ), a media connecting path between the chambers, said path being closed by an overflow closure element ( 41 ) and a discharge closure element ( 22 ), for the second chamber ( 19 , 19 a ), connected to the discharge opening ( 15 ), the discharge closure element ( 22 ) being constructed so as to open as a result of media pressure in the second chamber ( 19 , 19 a ), the discharge closure element having an axially displaceable closure body, openable by an overflow channel ( 48 ) bypassing the closure body.
8. Dispenser according to claim 5 , wherein the second chamber ( 19 a ) is constructed as a substantially cylindrical body bilaterally closed by a plug-like closure body, one closure body forming the discharge closure element ( 22 ) and the other closure body ( 41 ) is perforatable by means of said impact spike ( 29 ).
9. Dispenser according to claim 5 , wherein the second chamber ( 19 ) is replaceably received in the dispenser ( 11 ).
10. Dispenser for discharging a dispersion of a powder in air, comprising:
a manually operateable piston pump containing the air in a pump chamber;
a pump piston guided in the pump chamber provided to be shifted by hand;
a blister containing the powder in a bowl-shaped body, closed by a foil sealed to a rim of the bowl-shaped body;
the blister being held in a dispenser body in a movement path of a spike moveable together with an operating stroke of the piston thereby piercing the bowl-shaped body of the blister and opening it to the pump chamber, allowing the air to flow into the blister, mixing air and powder to create the dispersion and pressurizing the dispersion;
the blister being replaceably, but—during operation of the dispenser—fixedly received in the dispenser;
the foil being breakable under pressure of the pressurized dispersion; and
an outlet opening of the dispenser body.
11. Dispense according to claim 10 , wherein the dispenser body has at least two parts and wherein said dispenser further comprises a rim between the at least two parts, the blister being fixed at said rim.
12. Dispenser according to claim 5 , wherein the second chamber ( 19 ) is replaceably received in the dispenser ( 11 ).
13. Dispense according to claim 6 , wherein the second chamber ( 19 ) is replaceably received in the dispenser ( 11 ).
14. Dispense according to claim 7 , wherein the second chamber ( 19 ) is replaceably received in the dispenser ( 11 ).