Clay extruder

Details Clay extruder Clay extruder

2009-03-16

2011-12-06

Sorkin, David (Department: 1774)

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

C366S323000, C425S208000

Reexamination Certificate

active

08070350

ABSTRACT:
The clay extruder includes a drum2having a screw4having a rotary shaft6, a spiral rotary blade5for feeding the clay under pressure while kneading the clay fed into the screw, a pressure raising portion10to feed the clay under pressure while kneading the clay, and a rectifying portion11provided on the side of an extrusion port20in the drum2to rectify the clay into a columnar shape. The rectifying portion11has a rectifying rotary blade7whose intervals being longer than that of the rotary blade; an angle formed between the face on the side of the extrusion port in a sectional shape of the rectifying rotary blade cut along the central line of the rotary shaft6and the central line gradually decreases, as the rectifying rotary blade comes close to the extrusion port.

REFERENCES:
patent: 333788 (1886-01-01), Smout
patent: 687915 (1901-12-01), Chambers
patent: 766260 (1904-08-01), Jaques
patent: 2004/0062827 (2004-04-01), Yamaguchi et al.
patent: 2005/0073906 (2005-04-01), Hayashi
patent: 2539617 (2003-03-01), None
patent: 1 226 955 (1960-08-01), None
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patent: A-9-94818 (1997-04-01), None
patent: A-10-100131 (1998-04-01), None
patent: A-2005-66946 (2005-03-01), None
patent: A-2006-224563 (2006-08-01), None
Search Report issued in corresponding European Patent Application No. 09250741.7 dated Apr. 6, 2011.

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