| 摘要 |
In the manufacture of an electric heater, means ( 24, 26 ) is provided for feeding and guiding an elongate corrugated metal ribbon heating element ( 14 ) progressively into overlying edgewise relationship with a base ( 2 ) of thermal and electrical insulation material. Means ( 6, 8 ) is provided for supporting the base ( 2 ) and for effecting relative motion between a surface of the base ( 2 ) and the means ( 24, 26 ) for feeding and guiding the heating element ( 14 ), such that motion of the base ( 2 ) is synchronised with feeding of the element ( 14 ). Further means ( 28 ) is provided for applying localised edgewise pressure to the heating element ( 14 ) as it is progressively fed and guided into the overlying edgewise relationship with the base ( 2 ), to urge the heating element ( 14 ) towards the base ( 2 ) and cause an edge portion ( 22 ) of the heating element ( 14 ), or one or more parts ( 22 ) secured to the heating element ( 14 ) and extending edgewise therefrom, to become secured by embedding in the base ( 2 ).
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