A METHOD FOR MANUFACTURING CONCRETE BLOCKS HAVING A ROUGH DECORATIVE SURFACE AND A DEVICE FOR MANUFACTURING MOLDED SLABS FROM WHICH SAID BLOCKS ARE MADE

摘要

1327069 Hoppers K YAMASITA and Z YAMASITA 2 Dec 1970 57282/70 Heading B8S [Also in Divisions B5 and E1] A hopper comprises a storage cavity 11 (Fig 7) having a delivery aperture 15 fed by a screw 16, and a storage cavity 12 having a pair of delivery apertures 13 (Fig. 6) sandwiching the aperture 15. Material from the hopper drops into a partitioned, reciprocable frame 17 (Fig. 7) for movement to a mould 10, the frame 17 supporting a shutter 19 for closing the apertures 15, 13.