发明名称 |
Ceiling board corner embossing |
摘要 |
A ceiling board has a depression formed in the four corners of the face surface of the ceiling board. When the horizontal flange of one cross runner overlies the horizontal flange of the main runner, the edge of the ceiling board will rest on the flange of the main runner because the overlying runner is accommodated in the corner depression.
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申请公布号 |
US5974754(A) |
申请公布日期 |
1999.11.02 |
申请号 |
US19940297122 |
申请日期 |
1994.08.29 |
申请人 |
ARMSTRONG WORLD INDUSTRIES, INC. |
发明人 |
BODINE, DARRYL C.;VERNAU, G. DOUGLAS |
分类号 |
E04B9/04;(IPC1-7):E04B9/00 |
主分类号 |
E04B9/04 |
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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