Induction sealing device and method for manufacturing an induction sealing device
AssigneeTetra Laval Holdings & Finance S.A.
InventorsMartin Alexandersson, Karl Israelsson, Daniel Sandberg, Karl-Axel Johansson, Vincenzo De Salvo
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Abstract
The present invention relates to an induction sealing device for heat sealing packaging material for producing sealed packages. The present invention also relates to a method of manufacturing such an induction sealing device. The device comprises at least one inductor made of an alloy comprising silver and copper.
Claims19
Induction sealing device for heat sealing packaging material for producing sealed packages, comprising a supporting body possessing an outer surface and at least one inductor made of an alloy comprising silver (Ag) and copper (Cu), the at least one inductor comprising a pair of spaced apart sealing surfaces exposed at the outer surface of the supporting body to produce two parallel and spaced apart seals in the packaging material, the pair of spaced apart sealing surfaces being connected to one another by a loop, the pair of spaced apart sealing surfaces being made of the alloy so that the alloy directly contacts the packaging material during the heat sealing.
Induction sealing device cooperable with a counter-sealing element to heat seal tubular packaging material and produce sealed packages, the induction sealing device comprising:
- a supporting body possessing an outer facing;
- an inductor mounted in the supporting body, the inductor being made of an alloy comprising silver and copper;
- the inductor which is made of the alloy comprising silver and copper comprising a pair of spaced apart sealing surfaces exposed at the outer surface of the supporting body to produce two parallel and spaced apart seals in the tubular packaging material.
Method of manufacturing an induction sealing device for heat sealing packaging material for producing sealed packages, by providing an induction sealing device comprising at least one inductor extending in a longitudinal direction, made of an alloy comprising silver (Ag) and copper (Cu),
- the method further comprising:
- forming the at least one inductor to possess two sealing surfaces extending in the longitudinal direction parallel to one another;
- forming a protruding ridge extending along a longitudinal extension of each of the two sealing surfaces for cooperation with the packaging material and for increasing the sealing pressure on the packaging material during sealing;
- and
- the two sealing surfaces and the protruding ridge of the two sealing surfaces being formed from the alloy which consists of 72-78weight % Ag, 21-27weight % Cu and 0.5-2weight % Ni.
Dependencies are inferred from the claim text.