943,049. Lowering and raising mould walls. SKOVDE GASBETONG A.B. April 14, 1961 [April 20, 1960], No. 13461/61. Heading B5A. [Also in Division E2] A device for raising and lowering hinged walls 3 of a mould 1, e.g. for concrete, comprises fixed arcuate guiding members 5, the centre of the ares being at the hinges 4 of the walls 3, and catches 6 for supporting the walls arranged in the guiding members, the catches being raised and lowered by chains 7 fixed to the catches 6 and driven by an electric motor 10. The mould 1 is mounted on rollers 2 driven from an electric motor 11, and the catches 6 are fitted with rollers 8, to enable the mould walls 3 to be raised and lowered whilst the mould is moving on the rollers 2.