Apparatus for testing the purity of plastic melts

Details Apparatus for testing the purity of plastic melts Apparatus for testing the purity of plastic melts

2006-12-19

2006-12-19

Williams, Hezron (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Reexamination Certificate

active

07150181

ABSTRACT:
In a device for testing the purity of a plastic melt by plasticizing a melt and pressing a defined quantity of the melt through a screen with a defined size and porosity while simultaneously measuring the melt pressure, a changeover valve with two positions is provided—namely a working position for the test operation and a cleaning position—and furthermore a screen changer is provided, which has at least two screen positions in the interior of the testing device which is heated, namely a pre-heating and a testing position, in addition to a respective insertion and removal positions.

REFERENCES:
patent: 6171433 (2001-01-01), Otaigbe et al.
patent: 6533563 (2003-03-01), Otaigbe et al.

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