A method of lining a lateral pipe leading into a main pipe from the main pipe out, comprising providing a resin impregnated lateral lining tube of finite length and open ended having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, positioning the collar in the main pipe at the entrance to the lateral with the opening in the collar aligned with the lateral; inserting the lateral lining into the lateral pipe using a fluid medium under pressure to evert the liner through the opening in the collar, applying pressure to the lateral lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place. view more

A method of lining a lateral pipe leading into a main pipe, comprising providing a resin impregnated lateral lining tube of finite length and open ended and having at one end a collar of resin impregnated material with a central opening, the collar at the end of the lateral adapted to extend into the main pipe and contact the interior surface of the main pipe at the location where the lateral meets the main pipe with the opposite end of the lateral lining extending into the lateral, inserting the lateral lining into the lateral pipe and using a fluid medium under pressure expanding the lateral lining against the lateral wall, applying pressure to the lateral lining tube, and applying fluid pressure to the collar on the surface of the main pipe to cure the collar against the main pipe and form a seal at the location where the lateral meets the main pipe as curing of the resin takes place. view more

The method according to claim 6, including applying pressure to the collar by an inflatable means which is a bag or bladder.

The method according to claim 1, including applying pressure to the collar by an inflatable means which is a bag or bladder.

A liner of resin absorbent material for lining a lateral passageway connected to a main passageway, comprising:</claim-text> a lining tube of resin absorbable flexible material formed with a lumen conforming to the dimensions of the lateral having a r of resin absorbable flexible material adapted to conform to the interior surface of the main passageway around the lateral aperture for forming an improved seal at the junction between the main pipeline and the lateral, wherein the tube and the collar are both resin impregnable. view more

The liner of claim 1, wherein the resin absorbable material of the tube is impregnated with curable resin and the resin absorbable material of the collar is impregnated with curable resin.

The liner of claim 2, wherein the resin in the tube and the resin in the collar are cured at the same time.

A liner of resin absorbent material for lining a lateral passageway connected to a main passageway, comprising:</claim-text> a lining tube of resin absorbable flexible material formed with a lumen conforming to the dimensions of the lateral having a r consisting essentially of a resin absorbable flexible material adapted to conform to the interior surface of the main passageway around the lateral aperture for forming an improved seal at the junction between the main pipeline and the lateral, wherein the tube and the collar are both resin impregnable. view more

A lining for sealing the region of a lateral/main pipe connection, comprising a length of main pipe tubular structure for application to the full circumference of the surface of the main pipe on both sides of the lateral connection pipe, said length of main pipe tubular structure having a wall aperture to be aligned with the lateral pipe, and a lateral extension tubular structure bonded to the main pipe tubular structure at the aperture and extending from said aperture into the lateral pipe, said lateral tubular structure and main pipe tubular structure, each formed of a tubular segment having at least one layer of a resin absorbent material which in use is impregnated with curable synthetic resin. view more

The lining of claim 1, wherein the main pipe tubular structure is formed with said aperture therein and the lateral extension tubular structure includes at one end a collar disposed within the main pipe tubular structure whereby in use the extension tubular structure is fed through the aperture in the main pipe tubular structure so that the collar lies to the inside of the main pipe tubular structure. view more

The lining of claim 2, wherein the collar is formed of resin absorbent material similar to that of the lateral extension tubular structure.

The lining of claim 3, wherein the collar is bonded to the inside of the main pipe tubular structure about the aperture.