Hot-air fabric welder for waterproofing tape

A hot-air fabric welder for waterproof tape comprising a main body having a flat work table, a hot-air generating means and an upper roller fitted above the work table, a lower roller unit fitted below said upper roller by a support, the hot-air fabric welder comprising:

• a lower roller unit (10) comprises a flat roller portion (10a) with a uniform circumference and a tapered roller portion (10b) with a circumference that varies from one end to the other, and either the flat roller portion (10a) or the tapered roller portion (10b) can be arranged in turn to correspond to the upper roller (111) by pivoting of the support (20) that is driven by the drive of a pivoting means (30), and
• a straight welded portion is produced when the flat roller portion (10a) is arranged below and in correspondence to the upper roller (111) according to the rotation of said support (20), and a welded portion of arc shape is selectively produced when the tapered roller portion (10b) is arranged below and in correspondence to the upper roller (111).