Apparatus and method for injecting a liquid dye into a polymer melt
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United States of America Patent
Stats
-
Oct 9, 2007
Grant Date -
Jun 16, 2005
app pub date -
Jan 21, 2005
filing date -
Jul 24, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An apparatus and a method for injecting a liquid dye into a polymer melt, which includes a metering pump with a metering inlet and a metering outlet. The metering inlet connects to a dye tank and the metering outlet connects to a polymer melt carrying component. To add the liquid dye to the polymer melt in the melt carrying component in a quantity that is as uniform and accurate as possible, the invention provides for connecting the metering inlet of the metering pump to a feed outlet of a feed pump, which connects with its feed inlet to the tank. With that, it is possible to generate a feed pressure at the metering inlet of the metering pump, which can be adapted to an injection pressure at the metering outlet of the metering pump.
First Claim
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Cited Art Landscape
Patent Citation Ranking
- 15 Citation Count
- B29C Class
- 63.34 % this patent is cited more than
- 18 Age
