Method and apparatus for production of concrete pipe by the pack

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article

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Details

264312, 425262, 425427, B28B 2126

Patent

active

045405395

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.

REFERENCES:
patent: 1895740 (1933-01-01), Ukropina
patent: 1938230 (1933-12-01), Ukropina
patent: 3096556 (1963-07-01), Woods
patent: 3276091 (1966-10-01), Pausch
patent: 3632270 (1972-01-01), Baker et al.
patent: 3733163 (1973-05-01), Hermann
patent: 3746494 (1973-07-01), Gauger
patent: 4340553 (1982-07-01), Fosse
patent: 4407648 (1983-10-01), Fosse

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