Sealing bar
AssigneeTetra Laval Holdings & Finance S.A.
InventorsRoland Palmquist, Håkan Andersson, Anders Edsfeldt, Rickard Sandberg
Life of this patent
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Abstract
A method for providing an inductive sealing bar, comprises providing a conductive coil having at least one heating zone, embedding the coil in a supportive body such that the supportive body covers the entire coil along at least some part of the length of the at least one heating zone; and providing a sealing surface of the sealing bar by planarizing the coil and the supportive body such that the coil is exposed along the entire length of said at least one heating zone. The invention also relates to a sealing bar manufactured according to the method.
Claims13
A method for providing an inductive sealing bar, comprising:
- positioning a conductive coil in an injection mold, the conductive coil being a tubular body extending linearly in an axial direction, the conductive coil possessing a top portion when the conductive coil is in the injection mold;
- injection molding a polymeric material into the injection mold while the conductive coil is in the injection mold, the polymeric material flowing over the top portion of the conductive coil at spaced apart locations so that the polymeric material covers the conductive coil at delimited cavities spaced apart in the axial direction, the polymeric material creating a supportive body around the conductive coil;
- and
- planarizing the conductive coil and the supportive body to form the inductive sealing bar such that the top portion of the conductive coil is exposed along the entire length of at least one heating zone of the inductive sealing bar.
A method for providing an inductive sealing bar, comprising:
- positioning a conductive coil in an injection mold, the conductive coil being a tubular body, the injection mold contacting the conductive coil at spaced apart locations along a top portion of the conductive coil to fix the position of the conductive coil in the injection mold;
- injection molding a polymeric material into the injection mold while the conductive coil is fixed in the injection mold, the polymeric material creating a supportive body around the conductive coil, the top portion of the conductive coil possessing exposed zones which are not covered by the polymeric material and covered zones which are entirely covered by the polymeric material;
- and
- planarizing the conductive coil and the supportive body to form the inductive sealing bar such that the top portion of the conductive coil is exposed along the entire length of at least one heating zone of the inductive sealing bar.
Dependencies are inferred from the claim text.