An induction heating device having two superimposed conductors is provided, comprising a first conductor having a first electrically conducting pattern; a second conductor having a second electrically conducting pattern; wherein the first electrically conducting pattern and the second electrically conducting pattern are: i) connected to an alternating current in use; ii) superimposed thereby resulting in at least one section where the first electrically conducting pattern overlaps the second electrically conducting pattern; and iii) separated by at least a space arranged for accommodating material with an electrically conducting layer, wherein when the alternating current is supplied, the alternating current in the first electrically conducting pattern in a specific section has the same direction as the alternating current of the second electrically conducting pattern in said section.

Thermoplastic composite laminate parts are induction welded along a weld joint into an integrated structure using an induction coil. The induction coil remains stationary during the welding process and is integrated into a tool configured to match the parts.

There is described a multilayer rod (24) for an induction coil (22,22) of a sealing unit (18) comprising a metal layer (25) and a corrosion-resistant layer (26); the corrosion-resistant layer (26) comprises and/or is formed from a nickel alloy.

An assembly is provided for induction welding. This assembly utilizes a heat shield (e.g., a mica heat shield) with a recess. An induction welding coil may be disposed within this heat shield recess during induction welding operations. The wall thickness of the heat shield within the recess may be reduced to enhance heat transfer to a workpiece during induction welding operations. The heat shield may be coated with a ceramic coating to enhance the heat shield's heat resistance and reduce heat shield flaking at the recess during induction welding operations.

A structure and method of forming a metal foil-less liner, such that the entire liner can be recycled in a respective paper or plastic recycling stream. A separate application device is provided, which includes a metal layer, that is used to induction heat seal the liner to the container rim. The application device is removable, allowing a plastic closure cap to be applied over the liner sealed container rim, to provide the final product for sale to the consumer, who then removes the cap and peels off or pierces through the liner to dispense the product through the open mouth of the container. The application device is also reusable, i.e., it can be used to attach a subsequent liner to another container rim. The result is a liner that is fully recyclable in a paper or plastic recycling stream. In one embodiment, the entire container package may be recyclable, namely the plastic container is recyclable in a plastic recycle stream, the plastic container cap is recyclable in a plastic recycle stream (same or different than the recycle stream for the container), and the entire liner is recyclable in a paper or plastic recycle stream (which may be the same as one or more of the recycle streams for the container and cap). The result is also a sustainable packaging solution where the application device that generates heat for induction heat sealing can also be re-used.

An apparatus (10) and a method are described for producing a closing system (100) for containers comprising an anti-tampering strip (101) configured to be attached to an opening of a container, and a re-closable closing body (102), configured to hermetically close said containers. The apparatus (10) comprises a welding and deformation station (11) in which it is provided to weld a barrier element (108) to the re-closable closing body (102) and to fold a flexible annular portion (109) of the anti-tampering strip (101) back toward the inside of the closing system (100) while the latter is stationary in a same predetermined position in the welding and deformation station (11).

An induction heatable corner key, including a generally L-shaped body having an electrically conductive portion and an electrically non-conductive portion wherein the electrically conductive portion is formed of a material that is subject to inductive heating and of sufficient mass to transfer heat to the electrically non-conductive portion and to render the non-conductive portion at least partially molten. And, A method of joining polymer parts, including preassembling at least a first polymer frame part and a second polymer frame part with an induction heatable corner key coupling the first polymer part to the second polymer part and subjecting at least a portion of the induction heatable corner key and at least a portion of each of the first polymer part and the second polymer part to induction heating sufficient to render them molten, terminating the induction heating, and allowing the molten portions to cool and harden.

A heat sink for use in induction welding includes a number of tiles, wherein the tiles are electrically non-conductive and have a thermal diffusivity of greater than about 25 mm2/sec. A joint flexibly joins the tiles together.

To connect two plastic pipes 3 together, an induction connection sleeve 1 is used, which is provided with annular recesses 5 into which the pipes 3 with the ends 3A are pushed. Subsequently, induction heating elements 9 present in the induction connecting sleeve are heated with induction hand pliers 21 and the induction connecting sleeve is pressed against the end 3A of one of the tubes 3. The induction connection sleeve fuses to the tube. Because the induction hand pliers 21 are provided with ribs 27, grooves 19 are pressed into the pipe wall 3B in order to check whether sufficient heating and pressing has taken place over the entire circumference to obtain a gastight connection.

A magnetic heating apparatus which comprises a first rotor supporting first permanent magnets and a mating first rotor supporting second permanent magnets. The first and second permanent magnets both are arranged in alternating directions such that each pair of magnets, located directly on either side of any one of the first permanent magnets, have opposite polarities from a polarity of the magnet located therebetween. The first and the second permanent magnets are spaced from and define a panel passageway therebetween which facilitates passage of an assembled insulation panel, having a metallic core, therethrough. A first rotor drive rotates the first rotor, supporting the first permanent magnets, relative to the mating first rotor, supporting the second permanent magnets, to generate a changing magnetic field, in the panel passageway, for directly heating the metallic core of the assembled insulation panel as the panel passes therethrough without heating the non-metallic components.