GLF-500 Electromagnetic Bottle Induction Sealer Machine induction sealer,induction sealer machine,induction sealing machine ,Induction Cap Sealing Machine,heat induction sealer ChinaCoal02 Electromagnetic Bottle Induction Sealer Machine main principle is from electromagnetic induction theory. High frequency current brings to high frequency magnetic field, and high frequency magnetic field produces high frequency current to heating the aluminum foil rapidly, to make the foil adhesive to the mouth of the bottles. and so the foil can be adhesive to the mouth of the bottles.