Spray apparatus utilizing porous sheet
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United States of America Patent
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Feb 14, 1995
Grant Date -
N/A
app pub date -
Jan 28, 1993
filing date -
Jan 28, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A spray method and apparatus for uniformly coating a surface with a high degree of efficiency includes filling the pores of a porous sheet with a liquid and then directing compressed fluid from a nozzle into the sheet from one side to spray the liquid onto a surface spaced from an opposite side. Because the total volume of the pores is known, the volume of the sprayed liquid is also known. Moving the nozzle relative to the sheet and the substrate enables the entire surface to be uniformly coated. The size and distribution of the pores on the sheet define the distribution of the liquid sprayed onto the substrate. The coating may be a thick or a thin film of uniform thickness, or may even comprise a recognizable pattern.
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