EP2129956

• Per Aarsleff A/Ssince Nov 6, 2009

The present invention relates to an apparatus for curing a liner of a pipeline where the liner includes a resin which is curable by exposure to electromagnetic radiation of a specific wavelength or a specific wavelength range. The apparatus comprises a housing defining opposite first and second ends, an outer wall of a substantially cylindrical configuration, and an inner wall defining a substantially unobstructed through-going passage extending longitudinally through the housing between the first and second ends, and further comprises a pair of power supply wires for the supply of electrical power to the apparatus and extending from the first end of the housing, and a plurality of LED's irradiating electromagnetic radiation of the specific wavelength or the specific wavelength range. The plurality of LED's is positioned and substantially evenly distributed at the outer wall of the housing, and is connected through an electronic circuit to the pair of power supply wires. The plurality of LED's is further connected in thermal conductive relationship to heat dissipating elements freely exposed at the inner wall of the housing in the through- going passage of the housing for allowing a stream of cooling fluid to pass through the passage for dissipating heat from the heat dissipating elements and cooling the LED's.

From the international application WO2008101499