Title:
熱絶縁された導管の製造方法
Document Type and Number:
Japanese Patent JP4219428
Kind Code:
B2
Abstract:
A heat insulated pipe has an inner tube and a corrugated plastic outer tube, with the annular space between them filled with synthetic foam. The pipe is made by surrounding the inner tube with a film shaped to form a hose, filling the space with foamable synthetic and passing it through a mould made up of movable half-moulds. The foaming synthetic presses the film hose into the corrugations of the mould. The outer tube is then extruded on to the corrugated surface of the hose and is shaped into the corrugated form of the hose immediately after leaving the extruder die.
Inventors:
Jürgen Friesner
Urs Shennel
Alfred E. Sugar
Urs Shennel
Alfred E. Sugar
Application Number:
JP19583697A
Publication Date:
February 04, 2009
Filing Date:
July 22, 1997
Export Citation:
Assignee:
Brooke Roll Akchen Gesell Shaft Holding
International Classes:
B29D23/00; B29C44/30; B29C44/32; B29C48/06; B29C48/13; B29C48/30; B29K105/04
Domestic Patent References:
| JP47047106B1 | ||||
| JP58056831A | ||||
| JP51071370A | ||||
| JP53085556A |
Foreign References:
| DE3530187A | ||||
| DE2316835A |
Attorney, Agent or Firm:
Mitsufumi Esaki
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith
Tsuneo Mihara
Okumura Yoshimichi
Blacksmith