Method and device for induction sealing
AssigneeAlfelder Kunststoffwerke Herm. Meyer GmbH
InventorsHeinz-Rudolf Wiening, Horst Trombach
Life of this patent
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Abstract
A sealing device for sealing non-circular, in particular polygonal, for example tetragonal, hexagonal, octagonal or elliptical, container openings comprises one or a plurality of induction loops (11, 38, 41) for sealing purposes. Containers (2) comprise joined-on closure devices (3) with sealing discs (15) joined onto a sealing edge (14) of the container opening. The induction loops (11, 38, 41) are adapted to the shape of the sealing edge (14) and the spacing between the induction loop (11, 38, 41) and sealing edge (14) is constantly adjustable and selectable.
Claims20
A sealing device for sealing at least one container having a non-circular orifice with at least one sealing washer adapted to be joined to the orifice and induction sealed thereon, the sealing device comprising:
- a plurality of conveyor belts constructed and arranged to move the at least one container;
- at least one induction loop constructed and arranged to induce a current into the at least one sealing washer, the at least one induction loop comprising a coil member selected from the group consisting of a dual coil and a pair of coils running dually, and producing a homogeneous field adapted to a shape and measurement of an upper, sealing edge of the orifice of the at least one container, and moving parallel to the movement of the conveyor belts during sealing of the washer;
- and
- wherein movement of the at least one induction loop and conveyance of the at least one container on the conveyor belts are selectively controlled so as to substantially eliminate relative movement between the at least one induction loop and the orifice of the at least one container during sealing.
A sealing device for sealing at least one container having a non-circular orifice, the device including a plurality of conveyor belts on which the at least one container moves, and having at least one sealing washer which is constructed and arranged to be joined on to the orifice and induction-sealed thereon, the sealing device comprising:
- at least one induction loop adapted to induce a current into the sealing washers, the at least one induction loop comprising a coil member selected from the group consisting of a dual coil and a pair of coils running dually, and producing a homogeneous field adapted to a shape and measurement of an upper, sealing edge of the orifice, the at least one induction loop further being adapted to move during sealing of the washer;
- and
- wherein the speed of movement of the conveyor belts and movement of the at least one induction loop are selectively controllable so as to substantially eliminate relative movement between the orifice of the at least one container and the at least one induction loop during sealing.
A process for induction sealing containers each having a non-circular orifice, the process comprising the steps of:
- introducing the containers into a sealing device;
- halting the containers so as to create a dwell time;
- aligning an induction loop above an upper, sealing edge of a corresponding container;
- moving the induction loop from above the corresponding container and on to a lid of the container, the lid having a sealing washer therein;
- moving the induction loop parallel to the lid of the containers;
- applying a current so as to induction seal the containers;
- moving the induction loop in an upward direction, out of contact with the container after the induction sealing;
- and
- guiding the containers out of the sealing device.
A process for induction sealing containers having a non-circular orifice, the process comprising the steps of:
- introducing the containers into a sealing device;
- aligning an induction loop above an upper, sealing edge of a corresponding container;
- transporting the induction loop and the sealing edge of the corresponding container synchronously so as to substantially eliminate relative movement between the induction loop and the sealing edge of the corresponding container;
- moving the induction loop from above the corresponding container on to a lid of the container, the lid including a sealing washer therein;
- applying a current so as to induction seal the container;
- moving the induction loop in an upward direction, out of contact with the container after the induction sealing;
- and
- guiding the containers out of the sealing device.
A process for induction sealing containers having a non-circular orifice, the process comprising the steps of:
- introducing the containers into a sealing device;
- aligning an induction loop above an upper, sealing edge of a corresponding container;
- transporting the induction loop and the sealing edge of the corresponding container synchronously so as to substantially eliminate relative movement between the induction loop and the sealing edge of the corresponding container;
- moving the induction loop from above the corresponding container on to a lid of the container, the lid including a sealing washer therein;
- moving the induction loop substantially parallel to the lid of the containers;
- applying a current so as to induction seal the container;
- moving the induction loop in an upward direction, out of contact with the container after the induction sealing;
- and
- guiding the containers out of the sealing device.
Dependencies are inferred from the claim text.