Title:
PLASTIC PIPE WITH BELL
Document Type and Number:
WIPO Patent Application WO/2010/147887
Kind Code:
A3
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.
Inventors:
TOLIVER TIMOTHY (US)
KIME TONY (CA)
KOSSNER HUBERT (DE)
KIME TONY (CA)
KOSSNER HUBERT (DE)
Application Number:
PCT/US2010/038497
Publication Date:
March 31, 2011
Filing Date:
June 14, 2010
Export Citation:
Assignee:
ADVANCED PIPE SERVICES LLC (US)
PROFILEPIPE MACHINERY INC (CA)
UNICOR GMBH (DE)
TOLIVER TIMOTHY (US)
KIME TONY (CA)
KOSSNER HUBERT (DE)
PROFILEPIPE MACHINERY INC (CA)
UNICOR GMBH (DE)
TOLIVER TIMOTHY (US)
KIME TONY (CA)
KOSSNER HUBERT (DE)
International Classes:
B29D23/18; B29C48/30; B29D24/00; B29C48/07; B29C48/09
Foreign References:
| US4389180A | 1983-06-21 | |||
| US20050106281A1 | 2005-05-19 | |||
| EP1130303A1 | 2001-09-05 | |||
| EP0104835A1 | 1984-04-04 | |||
| JP2009500196A | 2009-01-08 |
Attorney, Agent or Firm:
LEONARDI, Robert, M. (Sobanski & Todd LLC, One Maritime Plaza, US)
Download PDF: