Apparatus for manufacture of cured in place liner with everted outer impermeable layer

Abstract

A resin impregnated cured in place liner having an everted outer impermeable coating is provided. A roll of a continuous length of resin impregnable material is formed into a tube. An impermeable film or wrapping is formed into a tube about a tubular former, sealed and continuously everted about the inner tubular member travelling in an opposite direction so that the everted wrapping envelopes the inner tubular member. Alternatively, the inner tubular member may be passed into a stuffer tube having an impermeable tube thereon that is everted onto the moving tubular member to encapsulate the inner tubular member. The inner tubular member may be passed through an open resin impregnation tank to impregnate the impregnable material prior to everting the outer layer thereon. The inner tubular member may have an inner layer of impermeable material bonded thereto. It may be formed into a tube with the impermeable layer on the outside and continuously everted to place the impermeable layer on the inside of the tube.

1 . An apparatus for wrapping a cured in place liner with an everted outer tubular impermeable wrapping, comprising: 
 a supply holder for holding a length of an impermeable material;    a tubular section having an open inlet end and an open outlet end;    a sealing section for sealing the length of impermeable material into a tube about the distal end of the tubular section and everting the tube of impermeable material into the inlet end to envelope an inner tubular member; and    pulling means for withdrawing the wrapped inner tubular member as the wrapping is everted about the inlet end of the tubular section.    
     
     
         2 . The wrapping apparatus of claim  17 , wherein the outlet end of the tubular section is open at the upper portion thereof.  
     
     
         3 . The wrapping apparatus of claim  18 , wherein the opening includes an inclined section.  
     
     
         4 . The wrapping apparatus of claim  18 , wherein a sealer is disposed over the open proximal end of the tubular section.  
     
     
         5 . The wrapping apparatus of claim  18 , wherein the sealing section is an edge sealer.  
     
     
         6 . An apparatus for wrapping a cured in place liner with an everted outer tubular impermeable wrapping, comprising: 
 a tubular supply holder for holding a tubular length of an impermeable material;    the tubular holder having an open inlet end and an open outlet end adapted to invert the tube of impermeable material into the inlet end to envelope an inner tubular member moving therethrough; and    pulling means at the outlet end of the tubular holder for withdrawing the wrapped inner tubular member as the wrapping is everted about the inlet end of the tubular section.