| 摘要 |
A ceramic tile which is rectangular in shape has an opening (12) near its ends. The corners have grooves (15), while at the other end, it is cut off to form a skirt. The tile is obtained by means of moulding of ceramic stoneware in two pressings, one of four and six times less than the other. Steps (17,21) are created during the first pressing, around the opening and peripherally all along the edge of the tile. The tile has grooves (18) on its parallel sides which form the casing for the retention heads, from which the tiles hang when they are placed on the roof. The entire piece is shaped in the course of the second pressing which maintains the descending steps (21,1F) of the grooves and determines in the side not seen of the part, an orthogonal striation (16) which is above the step (17) and the grooves (18), whose length defines the maximum and minimum overlapping of the tile. The outer side (19) of the tile and the borders (20) are glazed with a synterized enamel.
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