发明名称 |
METHOD AND PUNCH FOR PERFORATING CEMENTITIOUS TILES AND SO OBTAINED CEMENTITIOUS TILES |
摘要 |
A cementitious tile (54) is perforated using a punch (10) of elongate section having a leading face (16) with a saw tooth profile along its length. The punch (10) may also be used to produce indentations (A) which look like perforations when in situ. Circular punches (10) also having a saw tooth profile may be used. The tooth depth is preferable less than 2 mm and the included angle of the tooth profile between 90~ and 150~. The punches (10) produce exceptionally clean edges in the tile (54).
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申请公布号 |
CA2283783(A1) |
申请公布日期 |
1998.10.22 |
申请号 |
CA19982283783 |
申请日期 |
1998.04.09 |
申请人 |
BPB PLC |
发明人 |
DEVEREUX, WILLIAM |
分类号 |
B26F1/14;B26F1/24;B28B11/12;E04B1/84;E04B1/86;E04B9/04;(IPC1-7):B26F1/24;B28B19/00;B28B11/08;G01B11/12;G01N21/88 |
主分类号 |
B26F1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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