Today, induction technology provides an elegant means of sealing aluminium covers on jars of food product. This packaging method assures tamper protection, safety, hygiene and product preservation. Inductive heating of the aluminium film increases the temperature of the sealing product applied to the side of the cover in contact with the jar.
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This heating is combined with pressure applied to the cover for 0.5 to 1.5 s. This process is applied to all shapes of containers and for a wide range of materials, including: glass, cardboard, and plastics (PE, PP, PVC...).
In all cases there is no contact between the inductor and the cover. In addition to this advantage, there are several reasons why this new method is increasingly used:
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The heat is generated in the cover itself as near to sealing surface as possible. The process is thus simplified and the problems associated with the overheating of resistor type sealing heads are avoided.
The method can be used for circular, oval, square, rectangular or other shapes
The medium frequency generator is made using transistors and has no parts subject to wear.
Fives Celes manufactures several types of systems :
One-step sealing
Continuous sealing before encapsulation
Static sealing before encapsulation.
Fives Celes equipment often used in the Food and Drug Industry can be designed with a full stainless steel protection.
