Device and method for repairing pipe

A method of forming a bladder assembly for repairing an interior wall of a pipe, comprising:

• taking an elongated tubular inflation bladder having a peripheral wall extending between a first end and an opposite second end;
• folding the wall of the bladder onto itself near the first end of the bladder to form a longitudinal portion of the bladder having a greater wall thickness;
• connecting the first end of the bladder to the wall of the bladder between the first and second ends of the bladder;
• and
• closing the bladder.

A method of repairing an interior wall of a pipe, comprising:

• providing a liner having a first end and an opposite second end;
• providing a bladder assembly including an elongated tubular bladder having a peripheral wall that terminates in a closed end, the wall of the bladder having a first longitudinal portion with a first wall thickness and a second longitudinal portion at the closed end with a second wall thickness greater than the first wall thickness;
• impregnating the liner with a resinous material capable of curing and hardening;
• and
• pressing the liner against the interior wall of the pipe with the second longitudinal portion of the bladder extending beyond the first end of the liner.

An apparatus for repairing the junction of a main pipe and a lateral pipe connected thereto, comprising:

• a main bladder tube;
• a containment tube at least partially surrounding the main bladder tube;
• a launcher device having a first end and an opposite second end and a launcher device opening there between;
• the main bladder tube and the containment tube being outside and surrounding the launcher device;
• and
• a main liner member being outside and contacting the containment tube.

A method of repairing a damaged pipe junction between a main pipe and a lateral pipe, the method comprising:

• providing an apparatus including a main bladder tube;
• a containment tube at least partially surrounding the main bladder tube;
• a launcher device having a first end and an opposite second end and a launcher device opening there between;
• the main bladder tube and the containment tube being outside and surrounding the launcher device;
• and a main liner member being outside and at least partially surrounding the containment tube, the main bladder tube, and the launcher device;
• impregnating the main liner member with a resinous material capable of curing and hardening;
• moving the apparatus through the main pipe to an operative position with the main liner member adjacent the pipe junction;
• and
• pressing the main liner member against an interior wall of the main pipe.

A liner/bladder assembly for lining a lateral pipe and the junction between a main pipe and the lateral pipe, comprising:

• a main bladder tube having first and second ends and a main bladder tube opening there between;
• a lateral bladder tube extending from the main bladder tube about the main bladder tube opening;
• a lateral liner tube journaled within the lateral bladder tube;
• a containment tube at least partially surrounding the main bladder tube;
• a main liner member having a first end and a second end and a main liner member opening there between;
• the main liner member surrounding at least a portion of both the main bladder tube and the containment tube with the main bladder tube.