发明名称 |
Method and apparatus for making pipe sections in materials |
摘要 |
An apparatus and method for providing permanent pipe sections in a foam-backed material that utilizes two rotating members which cooperate to form alternate ridges and valleys in the material after which the valley portions are bonded to a backing sheet so as to maintain the pipe sections in the material.
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申请公布号 |
US4264390(A) |
申请公布日期 |
1981.04.28 |
申请号 |
US19790076212 |
申请日期 |
1979.09.17 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
ARMSTRONG, DAVID E. |
分类号 |
B29C44/56;B29C53/02;B29C53/28;B31F1/29;(IPC1-7):B31F1/29 |
主分类号 |
B29C44/56 |
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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