Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Reexamination Certificate
2007-11-20
2007-11-20
Davis, Robert B. (Department: 1722)
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
C425S208000, C366S125000, C366S079000
Reexamination Certificate
active
10849897
ABSTRACT:
The invention provides an improved mixer section for a screw for a molding machine. The improved mixer section includes at least one conveying flight and at least one spill flight intersecting with the conveying flight. At least one notch is formed in the conveying flight to enable mixing between adjacent flow channels. The spill flight terminates near the output of the mixer to create a trap zone for any unmelts that reach that area of the mixer.
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Chris Rauwendaal, More Tips for Mixing in Single-Screw Extruders, Plastics World, Jan. 14, 1991, pp. 43 to 47, United States of America.
Craig Denise D.
Zhang Raymond W.
Davis Robert B.
Husky Injection Molding Systems Ltd.
Rao G. Nagesh
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