Patent ID: 7305177

Claim:
An apparatus ( 1 ) for applying roof covering ( 2 ) comprising: a wagon ( 4 ) having a front outer portion ( 12 ), a front central portion ( 13 ), and wheels ( 3 ) attached to said wagon, said wagon ( 4 ) being adapted to join together two unrolled rolls of roof covering in connection to a joint ( 5 ) formed by covering layers ( 6 , 7 ) lying on top of each other; a hot air aggregate ( 8 ) supported by said wagon ( 4 ), said hot air aggregate ( 8 ) adapted to blow hot air toward the joint 5 to facilitate the joining together of the two unrolled rolls of roof covering in connection to the joint ( 5 ); a nozzle ( 9 ) via which said hot air aggregate ( 8 ) blows hot gas toward the joint ( 5 ) at the same time as said wagon ( 4 ) is moved forward; at least one operating pressure roller ( 10 ) attached to said wagon ( 4 ), said at least one operating pressure roller ( 10 ) being adapted to press together the covering layers ( 6 , 7 ) lying on top of each other; and an extra pressure roller ( 20 ) located behind said at least one operating pressure roller ( 10 ), said extra pressure roller ( 20 ) being adapted to only act against a surface of the joint ( 5 ) that is not treated by said at least one operating pressure roller ( 10 ), wherein said hot air aggregate ( 8 ) is movably mounted to said front outer portion ( 12 ) of said wagon ( 4 ) by a hinge ( 11 ) so that said nozzle ( 9 ) can be pivoted inwardly to an active position between the covering layers ( 6 , 7 ), and wherein said at least one operating pressure roller ( 10 ) is provided in the front, central portion ( 13 ) of the wagon ( 4 ) behind said nozzle ( 9 ) when said nozzle is pivoted inwardly to the active position between the covering layers ( 6 , 7 ) and said at least one operating pressure roller ( 10 ) includes a middle portion ( 14 ) and adjacent outer portions ( 15 , 16 ), said middle portion ( 14 ) having a diameter that is smaller than diameters of said adjacent outer portions ( 15 , 16 ) so as to provide two application surfaces ( 17 , 18 ) against a joint surface ( 19 ) in the joint ( 5 ).