Screw extruder with plunger feeder

Details Screw extruder with plunger feeder Screw extruder with plunger feeder

2011-06-07

2011-06-07

Sorkin, David L (Department: 1774)

Agitating

Rubber or heavy plastic working

With specified feed means

C366S084000

Reexamination Certificate

active

07954991

ABSTRACT:
The present invention is directed to a materials extrusion device including a screw extruder with a plunger feeder. It includes a screw extruder having a main housing, a materials advancing screw, a screw drive mechanism, a feed port for inputting materials to be extruded and an extrusion outlet port. It also includes a plunger feeder having an elongated, upwardly biased (non-horizontal) plunger housing, e.g., a cylinder, with a plunger. A plunger drive mechanism is connected to the plunger to move the plunger upwardly and downwardly within the plunger housing, and there is a feed outlet at an upper end of the plunger housing, the feed outlet being connected to the screw extruder feed port.

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International Preliminary Report on Patentability With Written Opinion of the International Searching Authority (Jul. 20, 2009).

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