| 摘要 |
944,066. Moulding building blocks. GLYNERCAST Ltd. Feb. 20, 1962 [Feb. 20, 1961], No. 6117/61. Heading B5A. [Also in Division E1] A mould for a building slab comprises a pressing part 14 and a bottom part 12 which can be raised to eject the slab. The part 14 includes an interchangeable plate 14a which, like the mould walls, is formed with projections 10, 11 to form grooves and recesses in the slab. A vibrating motion is applied to the mould via the part 13 which supports the bottom plate 12.
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