| 摘要 |
PCT No. PCT/EP94/01443 Sec. 371 Date Dec. 19, 1995 Sec. 102(e) Date Dec. 19, 1995 PCT Filed Apr. 28, 1994 PCT Pub. No. WO94/25235 PCT Pub. Date Nov. 10, 1994A roof tile making machine and its method of operation. The reinforcement ribs on the underside of a concrete roofing tile are formed during their manufacture by directing mortar into recesses in a pallet on which the tile is made, with a compactor means in the form of multi-tined wheels compacting the mortar in the recesses, and providing thereafter a secondary layer of mortar over the compacted reinforcement ribs, to complete the tile in a conventional manner. A tile provided by the apparatus of the invention has reinforcement ribs which are compacted to the same degree as the remainder of the tile, thereby ensuring that the finished product, when cured, has a uniform, or substantially uniform, strength. |
