Cleaning and liquid contact with solids – Apparatus – With plural means for supplying or applying different fluids...
Reexamination Certificate
2005-06-14
2005-06-14
Stinson, Frankie L. (Department: 1746)
Cleaning and liquid contact with solids
Apparatus
With plural means for supplying or applying different fluids...
C134S099200, C134S148000, C134S153000, C134S170000
Reexamination Certificate
active
06904920
ABSTRACT:
A machine for cleaning containers such as flat media carriers has inside and outside arrays of nozzles arranged to spray a cleaning solution onto containers supported on a spinning rotor in a chamber. The cleaning solution, a mixture of water and a detergent or surfactant, is prepared by drawing out surfactant directly from a surfactant bulk storage vessel by means of a metering pump. The flow rate of the water is measured by a flow meter and in combination with the metering pump, a proper amount of surfactant is injected into the water line to produce a mixture with a desired surfactant concentration for removing contaminants. The mixture is injected into the water line at a mixing control valve to ensure that the water and surfactant are thoroughly mixed before being injected into the media carrier. Where the wafer carrier is provided with multiple rinse manifolds for spraying the carrier, a flow meter and mixing control valve are provided in the water inlet line for each manifold and a separate metering pump is provided for injecting surfactant into each water line to ensure that a proper amount of surfactant is injected into each water line to produce a surfactant/water mixture with a desired surfactant concentration.
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Drawing—STORM with Surfactant Aspiration—Jul. 10, 2000.
Bexten Dan
Norby Jerry
Perkins Coie LLP
Semitool Inc.
Stinson Frankie L.
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