An improved process of manufacturing ceiling and partition slabs or building blocks and ceiling and partition slabs or building blocks manufactured according to said process and apparatus for the said manufacture

摘要

195,909. Ryan Manufacturing & Construction Co., Ltd., and Ryan, J. Aug. 3, 1922. Moulds for ceiling and partition slabs comprise a bottom board 2 having fixed borders 3, 4 and a removable border 5. Slots 15 for receiving a saw or the like are provided and access is given to these by removing the board 5 after the slab has set. These slots enable the slab to be cut to convenient sizes.