Abstract: A multi-layer bell is formed from the outer shell of a multi-layer pipe in a secondary process, thereby allowing the extrusion process to be conducted at normal speeds. The bell may include a strain limiting membrane fused or mechanically secured between the outer shell extrusion layer and the inner liner extrusion layer, increased hoop or circumferential stiffness. This invention allows the extrusion process to be in its simplest form, with no adjustments to the corrugator or extruder speeds.
Type:
Application
Filed:
June 14, 2010
Publication date:
April 19, 2012
Applicants:
ADVANCED PIPE SERVICES, LLC
Inventors:
Timothy Toliver, Tony Kime, Hubert Kossner