Patent ID: 7509980
Filing Date: 2009-03-31
Classification: B64D,F16L,F24F,Y10T

Abstract:
1. Ventilation tubing comprising, as seen from the inside to the outside, a bush, an insulating layer and a cover sheet characterized in that the insulating layer is a quartz-fiber wool, the thickness of said quartz fiber wool is between 6 and 15 mm and said quartz-fiber wool exhibiting a specific surface weight between 65 and 150 g/m 2 , wherein the bush ( 1 ) and the cover sheet ( 3 ) is a plastic sheet having a weave of interlaced filaments and wherein the specific surface weight of said plastic sheet is substantially between 30 and 65 g/m 2 and its thickness is substantially between 10 and 15μ (microns).