Inductor for induction welding of a packaging material
AssigneeTetra Laval Holdings & Finance S.A.
InventorsGiulio Casini, Luciano Amidei
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Abstract
An inductor for induction welding of a packaging material having at least one layer of metal foil is disclosed. The inductor comprises a welding surface configured to be arranged opposite the packaging material for heating thereof, and at least one spacing element arranged to protrude from the welding surface in a first direction towards the packaging material, when the packaging material is arranged opposite the welding surface, whereupon the least one spacing element separates the packaging material from the welding surface by an off-set distance. A sealing machine for sealing packaging material and a method of welding a packaging material is also disclosed.
Claims19
An induction apparatus for induction welding of a packaging material having at least one layer of metal foil, the induction apparatus comprising
- an inductor configured to heat the packaging material via induction,
- a welding surface configured to have the packaging material arranged along the welding surface for heating the packaging material, the inductor comprising the welding surface, and
- at least one spacing element protruding from the welding surface in a first direction towards the packaging material for the at least one spacing element to space the packaging material from the welding surface, with the packaging material arranged along the welding surface, whereupon the least one spacing element separates and aligns the packaging material from the welding surface by an off-set distance.
A method of welding a packaging material having at least one layer of metal foil with an inductor configured to heat the packaging material via induction, the inductor having a welding surface configured to have the packaging material arranged along the welding surface for heating the packaging material, the method comprising
- conveying the packaging material over the welding surface at an off-set distance from the welding surface by moving the packaging material over at least one spacing element protruding from the welding surface, wherein the at least one spacing element is arranged such that the off-set distance is substantially constant over the welding surface along a feed direction in which the packaging material is conveyed.
Dependencies are inferred from the claim text.