| 摘要 |
Upper and lower chamber portions of cup shape form the bottom and sides of the chamber and are provided with a number of openings for the supply of steam, for the removal of condensate, for supplying cold water and for introducing granules of expandable material. One of the cups is separable from the rim of the vessel and contains at least the openings for supplying material and for connections to a cold water supply. By dividing the steam chamber into two portions when the mould is changed it is only necessary to change the bottom element of the steam chamber to correspond with the new mould. |
