	US 7,481,246 B2
	Lateral pipe lining material and lateral pipe lining method
Takao Kamiyama, Hiratsuka (Japan); Koji Kaneta, Hiratsuka (Japan); and Kenji Fujii, Hiratsuka (Japan)
Assigned to Shonan Gosei-Jushi Seisakusho K.K., (Japan)
Filed on Jul. 25, 2007, as Appl. No. 11/880,979.
Claims priority of application No. 2006-211546 (JP), filed on Aug. 03, 2006.
Prior Publication US 2008/0029177 A1, Feb. 07, 2008
Int. Cl. F16L 55/16 (2006.01)

U.S. Cl. 138—98 [138/97; 156/287; 264/269]

12 Claims

5. A lateral pipe lining method for lining a lateral pipe that branches off from a main pipe, comprising the steps of:

preparing a lateral pipe lining material that comprises a tubular resin-absorbing material impregnated with a curable resin and having a brim attached at one end thereof, and a ring-shaped sealing member composed of an elastic material attached on a surface of the brim on the lateral pipe opening side at a portion on the tubular resin-absorbing material side, the ring-shaped sealing member having an annular protruding part on an upper surface thereof that has an outer diameter substantially the same size as the inner diameter of the lateral pipe opening;

applying a bonding resin to a surface of the brim on the lateral pipe opening side;

bringing the brim close to the peripheral edge of the lateral pipe opening of the main pipe so that the annular protruding part of the sealing member is inserted into the lateral pipe opening and seals a gap between an inner peripheral surface of the main pipe and a surface of the brim facing the inner peripheral surface thereof;

evertedly inserting the lateral pipe lining material into the lateral pipe in a state in which the bonding resin applied to the brim comes into contact with the inner peripheral surface of the main pipe; and

curing the resin in the lateral pipe lining material in a state in which the evertedly inserted lateral pipelining material is pressed against the inner peripheral surface of the lateral pipe, the brim of the lateral pipe lining material being bonded to the inner peripheral surface of the main pipe via the bonding resin, thereby integrating the lateral pipe lining material and the main pipe.