Method of and an apparatus for monitoring the digassing opening

Details Method of and an apparatus for monitoring the digassing opening Method of and an apparatus for monitoring the digassing opening

1978-12-20

1980-04-08

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 403, 264 407, 264102, 425145, 425146, 425147, 526 67, B29F 303

Patent

active

041972686

ABSTRACT:
A control device connected to rotational speed measuring means for an extruder screw, to a filling level monitor in a degassing opening of the extruder, to a cut-off in a filling container for the extruder, to vacuum means connected to the degassing opening and to a source of gas under pressure such that upon receipt from the speed measuring means or the filling level monitor by the control device of an indication of probable filling of the degassing opening with melt, the control device closes the cut-off, disconnects the vacuum means from the degassing opening and connects the gas pressure source thereto.

REFERENCES:
patent: 3229445 (1966-01-01), Kraft
patent: 3244688 (1966-04-01), Goins
patent: 3579728 (1971-05-01), Reid et al.
patent: 3937778 (1976-02-01), Tanaka
patent: 4067554 (1978-01-01), Koch

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