Patent ID: 7832703
Filing Date: 2010-11-16
Classification: B28B

Abstract:
1. An apparatus for protecting a concrete pipe lined with a plastic liner during the manufacture of the pipe by a dry cast pipe making machine, said apparatus comprising: a jacket and a hollow core providing a form for the lined concrete pipe, the core having a plastic liner in place around the outside of the core and the core having a top edge; a plurality of spaced-apart, generally L-shaped plates adapted to be secured to the top edge of the core, each plate having legs with one leg extending inwardly inside the hollow core and with the other leg extending over the top edge of the liner and downwardly over the liner when the plates are secured to the core; and a clamping device combined with each plate for removably securing the plates to the core during the manufacture of the lined pipe, the clamping devices being positioned inside the core.