Title:
ADIABATIC CONDUIT
Document Type and Number:
Japanese Patent JPS5530576
Kind Code:
A
Abstract:
A tube system, which includes an inner and a concentric outer tube, is provided with a spacer made by cutting oblique notches into a polyurethane foam layer on a paper ribbon and by helically wrapping the ribbon onto the inner tube, the oblique and tapered foam elements pointing inwardly or outwardly, but the notches are aligned to form axial ducts. After forming the outer tube about the spacer, these ducts are filled with material that foams in situ.
Inventors:
KURAUSU BAUERUMAISUTERU
GERUHARUTO TSUIIMEKU
BERUNTO AIRUHARUTO
GERUHARUTO TSUIIMEKU
BERUNTO AIRUHARUTO
Application Number:
JP5641079A
Publication Date:
March 04, 1980
Filing Date:
May 10, 1979
Export Citation:
Assignee:
KABEL METALLWERKE GHH
International Classes:
B29C39/00; B29C63/18; B32B1/08; F16L59/14; F16L59/02; F16L59/12; F16L59/125; F16L59/147; (IPC1-7): B29D27/04; B32B1/08; F16L59/14