| 摘要 |
A conventional electric hotplate with a sheet metal supporting ring surrounding the same is fitted into a glass or ceramic built-in plate, while using an intermediate ring, whose outer rim rests on the built-in plate, while the support ring is supported thereon. The intermediate ring has a flat S-shaped configuration and is much wider than it is high. Thus, the built-in opening can be made larger than the hotplate. A packing, which is held and shielded by an insert ring, surrounds the inner rim of the built-in opening. The packing is located on a substructure, which has centering projections for the insert ring or the hotplate.
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