Patent · US Expired

Apparatus and method for injecting a liquid dye into a polymer melt

US7278776B2 · kind B2 · utility

16Cited by

7References

13Claims

0Family size

Assignee

Saurer GmbH & Co. KG · DE

Inventors

Ulrich Helbing · Burscheid, DE
Georg Stausberg · Remscheid, DE
Jörg Alexander · Remscheid, DE
Jurgen Hasenburg · Radevormwald, DE

Key dates

Filing date	Jan 21, 2005
Grant date	Oct 9, 2007
Priority date	—
Expiry date	Oct 23, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86139
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.