B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/16
B28B 21/26 (2006.01) B28B 21/24 (2006.01) B28B 21/56 (2006.01)
Patent
CA 1230736
ABSTRACT A packerhead, a concrete pipe making machine having said packerhead, and a method of making concrete pipe are disclosed in which twist forces on the reinforcing wire cage of the pipe and concrete voids are eliminated by rotation of the longbottom and rollerhead portions of the packerhead in opposite directions. The peripheral speed of the system is also increased over conventional systems.
459911
Crawford Gerald R.
Kozlowski Brian J.
Crawford Gerald R.
Kozlowski Brian J.
Ridout & Maybee Llp
LandOfFree
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