FIELD: process engineering.
SUBSTANCE: proposed device 10 is to be used in making packages 7 for fluid food products from tube 7 of sealing packing material 3. Said device 10 comprises signal generator 12 to output variable-power signal Sw, inductor 13 to receive signal Sw to induce electric current in packing material sheet 3 to make heat seal said sheet, and circuit 11ґ to match impedances, said circuit being connected in between source 12 and inductor 13. Said circuit 11ґ has two input terminals 11.1, 11.2, first and second lines 23, 24 connected to said input terminals, and variable-capacitance stage 21. every controlled switch SW1-SW4 selectively connects appropriate capacitive element C1-C4 in between said first and second lines 23, 24, and controlled stage 22 configured to control operating state of controlled switches SW1-SW4.
EFFECT: lower heat transfer, faster switching, hence, lower inertia.
12 cl, 7 dwg
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