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US 6,184,509 B2Granted
Heating apparatus and heating element assembly method
AssigneeU.S. Philips Corporation
InventorsGerald R. F. Scott, David V. Hefford
Life of this patent
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Abstract
A heating apparatus comprises a plastic body and a planar heating element, together defining a liquid heating vessel. The heating element is clamped between a portion of the body and a retaining ring, the body and the retaining ring being fixed together by an induction weld. Uniform compression of a seal is obtained during the welding process. The weld provides a reliable seal.
Claims7
A method of attaching a planar heating element to a plastics body to define a liquid heating vessel, an aperture being defined in the body for receiving the heating element, the method comprising the steps of:
- covering the aperture with a first face of the heating element and positioning a seal between the heating element and the body;
- positioning a retaining ring over a second face of the heating element, and which engages with a portion of the plastics body, an induction heating member being located between the body and the retaining ring;
- causing inductive heating of the member to form an induction weld of the ring to the body, while applying a force to cause relative movement of the retaining ring and the vessel body to clamp the heating element in position and to compress the seal.
Dependencies are inferred from the claim text.