The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2007
Filed:
Jan. 21, 2005
Ulrich Helbing, Burscheid, DE;
Georg Stausberg, Remscheid, DE;
Jörg Alexander, Remscheid, DE;
Jürgen Hasenburg, Radevormwald, DE;
Ulrich Helbing, Burscheid, DE;
Georg Stausberg, Remscheid, DE;
Jörg Alexander, Remscheid, DE;
Jürgen Hasenburg, Radevormwald, DE;
Saurer GmbH & Co. KG, Monchengladbach, DE;
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.