FIELD: technological processes.
SUBSTANCE: invention relates to versions of plastic film heat welding devices including opposite sections of side edges, which are overlapped and sealed by heat welding together in lengthwise direction. Device comprises two heaters 5 arranged on side edges sections 3 opposite sides. Heaters 5 have heating surfaces 6 for side edges sections 3 preliminary heating, wherein heating surfaces 6 are located at distance and opposite to each other. In each of heating surfaces 6 plurality of suction holes 7 is formed, so, that sections 3 side edges are drawn by suction holes 7 and come in contact with heating surfaces 6, and channel formed in each of heaters for connection with suction holes 7. Device also has pair of pressure rollers 9 located down behind heaters.
EFFECT: technical result achieved when using devices according to inventions, consists in providing required weld strength at welding in lengthwise direction.
3 cl, 8 dwg
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