Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – Molding of thermosetting or cross-linking stock
Reexamination Certificate
2010-01-01
2011-12-13
Heitbrink, Timothy (Department: 1744)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
Molding of thermosetting or cross-linking stock
C422S310000, C366S159100, C366S162400, C366S162500, C425S546000
Reexamination Certificate
active
08075302
ABSTRACT:
An apparatus and method for optimally mixing and injecting a two part urethane foam which utilizes a unique mixing head having needle type valves which are specially sealed and positioned, able to provide precisely controlled amounts of constituent mixing compounds, and are further able to resist clogging. The apparatus further includes an electric-pneumatic actuation system, an unmixed compound recirculation system, and a cleaning solvent injection system which are functional while the apparatus is in use. The apparatus and method precisely controls the temperature, pressure, and delivery rates for optimum urethane mixture, viscosity, delivery, reaction time, and reliability.
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Heitbrink Timothy
Klug Kevin L.
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