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US 5,702,623 AGranted
Heating apparatus
AssigneePifco Limited
InventorJames Henry Sharples
Life of this patent
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AssigneePifco Limited
InventorJames Henry Sharples
Estimating the term…
A method for attaching a planar electrical element (5), such as a thick film printed circuit, to a vessel (1) whereby the element (5) is integrated in the body of the vessel (1) to form a heating apparatus such as an electric kettle. The vessel (1) defines an aperture (4) at a position where the element (5) is to be secured thereto and the element (5) includes a plate capable of covering the aperture (4). The element (5) is retained in position covering the aperture (4) by subsequent deformation of the body of the vessel. In the method, a sealing member (7, 11, 12, 13) is located between the periphery of the aperture (4) and the element (5) and a securing member (6) is positioned on the element (5) on the opposite side to the sealing member (7, 11, 12, 13). The securing member (6) is retained in position, with the element (5) in contact with and compressing the sealing member (7, 11, 12, 13) by a predetermined amount whilst the body of the vessel (1) is deformed, such as by heat forming, in a region (9, 15) around the aperture (4). The element (5) is thereby retained in position with the sealing member (7, 11, 12, 13) under compression.
A method of attaching a planar electrical heating element to a vessel whereby the heating element is integrated in the body of the vessel to form a heating apparatus, the vessel defining an aperture at a position where the heating element is to be secured thereto and the heating element comprises a plate capable of covering the aperture, the method comprising the steps of:
A heating apparatus comprising a vessel for heating liquid and a planar electrical heating element integrated in a body of the vessel, the heating element covering an aperture defined in the body of the vessel, the heating element being retained in position by deformation of the body of the vessel in a region around said aperture, a seal being located around the aperture between the heating element and the body of the vessel, and a securing member located in contact with the heating element on the opposite side thereof to the seal and against which a deformed portion of the body bears.
Dependencies are inferred from the claim text.