Patent ID: 9334998
Filing Date: 2016-05-10
CPC Classification: E03F,F16L

Claim Text:
1. A tubular liner for rehabilitating sewers, the tubular liner comprising: a circumferentially expandable reinforcing layer impregnated with a light-curable reactive resin; an outer tubular film surrounding said reinforcing layer and formed of a radially expandable material impermeable to UV light; a protective tube of a tear-resistant material disposed around said outer tubular film and having a connecting portion extending in longitudinal direction of said outer tubular film and configured to expand in circumferential direction by an introduction of compressed air into the tubular liner, said protective tube having longitudinal portions; said tear-resistant material of said protective tube passing over itself in an overlapping region in vicinity of said longitudinal portions; said expandable connecting portion including a predetermined tearing location extending in longitudinal direction of the tubular liner; said longitudinal portions of said protective tube being connected to one another in a substantially liquid-tight manner along said predetermined tearing location before expansion of the tubular liner; and said reinforcing layer and said outer tubular film configured to come to lie against an inner wall of a sewer before curing said reactive resin, upon introducing the tubular liner into a sewer to be rehabilitated and expanding the tubular liner by the introduction of compressed air.