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1. WO1997016964 - A SPRAY SYSTEM FOR NEED DOSAGE

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P a t e n t C l a i m s

1. A method of dosing plant protection agent for deliv-ery to a cultivation area using a spray device comprising at least two tanks (1, 2) with lines connecting the tanks ( 1 , 2 ) with a mixing chamber and a spray device having nozzles, such that the contents of one tank (1) may be mixed with the contents of the other tank (2),
c h a r a c t e r i z e d in that one tank (1) contains a plant protection agent in a maximally permissible concentration, and the other tank (2) contains a diluent, preferably water.

2. A method according to claim 1, c h a r a c t e r i z e d in that the amount and the dosage of the contents from each tank are regulated such that the drop picture and the liquid amount discharged from the nozzles to the spray device are constant, and that the amount of plant protection agent applied per unit of area is constant.

3. A method according to claims 1-2, c h a r a c t e r i z e d in that the dosage proportion is recorded by means of measuring and regulating equipment which, by means of valves and/or pumps, regulates the liquid amount which is supplied to the nozzles (9) of the spray device.

4. A method according to one or more of the preceding claims, c h a r a c t e r i z e d in that the mixing of the contents from the two tanks (1, 2) is performed immediately before the nozzles (9) of the spray device.

5. A device for the dosage of plant protection agent for delivery to a cultivation area, comprising at least two tanks (1, 2) having lines which lead to a mixing chamber and a spray device having nozzles (9), c h a r a c t e ri z e d in that the mixing chamber (15) is positioned immediately before the nozzles (9).

6. A device according to claim 5, c h a r a c t e r i z e d in that the device additionally comprises metering and regulating equipment which, by means of valves and/or pumps, regulates the liquid amount supplied to the nozzles .