METHOD OF AND DEVICE FOR INDUCTION WELDING OF PACKING MATERIAL Russian patent published in 2002 - IPC

FIELD: light and food industries; packing materials. SUBSTANCE: in proposed device inductor is connected to high-frequency current source and is provided with at least two parallel spaced conductors. Holder has electrically insulated housing. Both parallel conductors are connected to each other and to current source by conductors placed in upper surface of inductor crosswise relative to parallel conductors so that they coincide with defining lines of packing material. High-frequency electric current is induced is induced in layer of metal foil for melting thermoplast layer. Current is supplied from one conductor to the other and for welding central zone of packing material. Power consumption is equal to that when welding edge zones. Welding is carried out according to rectangular scheme. Shorter sides of rectangle consist of outer defining lines of packing material. EFFECT: quality packing of viscous materials, such as tomato paste, fiber products, etc. 5 cl, 9 dwg