Pulsed spray of fluids
AssigneeAmerican Hoechst Corporation
InventorEllwood J. Horner
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Abstract
A method for automatically spraying a liquid on the surface of a moving object, particularly developer, rinse and gumming liquids on an exposed, photosensitive printing plate, in which the liquid is continuously supplied to a distribution line at a predetermined pressure, and simultaneously with the supply of liquid, the object is transported past a spray device connected to the distribution line. An impinging spray of the liquid is alternately applied to the object for a first predetermined period and the application is interrupted for a second predetermined period and the cycle is repeated a plurality of times during the passage of the object past the spray device, as by a solenoid valve mounted in the distribution line and a timer connected to the solenoid valve to open and close the same.
Claims13
A method for automatically spraying a liquid on the surface of a moving object comprising continuously supplying said liquid to a distribution line at a predetermined pressure and, simultaneously with supplying said liquid to said line, transporting said object past a spray means, pulsatingly applying an impinging spray of said liquid on said surface, as said object passes said spray means, for a sufficiently short, first, predetermined period of time to maintain an essentially constant, predetermined pressure on said liquid issuing through said spray means, and building up said predetermined pressure between pulses for a sufficiently long, second, predetermined period of time to pulsatingly pass said liquid through said spray means at a rate sufficient to deposit a continuous coating of said liquid on said surface of said moving object.
Dependencies are inferred from the claim text.