CONTINUOUS BI-METALLIC TWIN BORE BARREL FOR SCREW EXTRUDER AND METHOD OF MAKING SAME

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20090086568A1
SERIAL NO

12236298

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A continuous bi-metallic twin bore barrel is produced by forming first and second single bore barrels, centrifugally lining the bores of the single bore barrels with a bi-metallic liner, heating the single bore barrels to harden the linings, fastening each single bore barrel into a barrel machining jig, and cutting each single bore barrel along its length to expose its bore. The barrel machining jigs are fastened together such that two single bore barrels are positioned adjacent and in contact with one another and their bores are in communication with one another. The two single bore barrels are seal welded together to form a twin bore barrel. The twin bore barrel is removed from the jigs and clamped along its length.

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Patent Owner(s)

Patent OwnerAddress
C D L TECHNOLOGY INCADDISON IL

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Holmes, George A West Chicago, US 13 29
Rybka, Tadeusz Streamwood, US 12 16

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