Apparatus for applying viscous mass to a surface, method for cleaning valves thereof and traffic printer based on such apparatus
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United States of America Patent
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Apr 5, 2016
Grant Date -
Dec 26, 2013
app pub date -
Mar 9, 2012
filing date -
Mar 11, 2011
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Applicator (11) for application of a viscous mass (31) to a surface (33) comprising a heated chamber (32) in communication with openings (12) controlled by valves (14) allowing dropwise discharge of the viscous mass to the surface. The valves (14) are non-packed and comprise an outer sleeve (15) having at least one through opening (16) in its sleeve wall and valve plug (17) adapted to the internal surface of the sleeve (15). The valve plug (17) is reciprocated by a valve lifter (18) from a closed position completely sealing the at least one through opening (16) in the sleeve wall, to an elevated open position exposing at least the lowermost part of the at least one through opening (16) allowing viscous mass (31) to pass from the outside of the sleeve (15) to the inside thereof.
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