Method of manufacturing a pipe liner bag

Details Method of manufacturing a pipe liner bag Method of manufacturing a pipe liner bag

F - Mech Eng,Light,Heat,Weapons

16

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F16L 55/162 (2006.01) B29C 53/48 (2006.01) B29C 65/00 (2006.01) B29C 65/50 (2006.01) B29C 65/62 (2006.01) F16L 55/165 (2006.01)

Patent

CA 2287125

A method of manufacturing a pipe liner bag which is composed of a tubular resin absorbent material having an outer surface covered with a highly air-tight plastic film and a hardenable resin impregnated in the tubular resin absorbent material. The method involves folding a strip-shaped resin absorbent material and aligning both ends thereof in the width direction, straight sewing overlapped portions to form a tubular resin absorbent material while leaving a sewing margin, turning the tubular resin absorbent material inside out such that a previous inner surface thereof appears outside, and welding or adhering a plastic film entirely or partially on the outer surface of the tubular resin absorbent material to air-tight seal the outer surface. The method can reduce a time required for a joining operation and simplifying a sealing operation after both ends of the strip-shaped resin absorbent material have been joined.

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