Dispensing devices
AssigneeThe Procter & Gamble Company
InventorsMaurice Joseph Prendergast, Michael Leslie Green
Life of this patent
Estimating the term…
Abstract
An electrostatic spraying device comprising a nozzle, means for establishing a column of material to be sprayed within a passage leading to the nozzle outlet such that the leading surface of the column is spaced from the nozzle outlet, means for pneumatically ejecting said column or part thereof from the nozzle and means for applying high voltage to the material so that the spray formed by breaking up of the column on ejection from the nozzle are electrically charged. The column of material in the passage is preferably a discreet slug having a leading surface spaced from the nozzle outlet and a trailing surface to which air, gas or vapor under pressure can be applied to effect ejection of the slug from the nozzle.
Claims24
An electrostatic spraying device for forming a spray from one discreet slug of material, the device comprising a nozzle;
- means for establishing the one discreet slug of said material to be sprayed within a passage leading to the nozzle outlet such that a leading surface of the one discreet slug is spaced from the nozzle outlet;
- means for ejecting the one discreet slug of material from the nozzle;
- and means for applying high voltage to the one discreet slug of material so that the spray particles formed by breaking up of the discreet slug on ejection from the nozzle are electrically charged.
Dependencies are inferred from the claim text.