发明名称 |
Method of making double layer sheet metal panels with ducts formed by inflation |
摘要 |
A method of making sheet metal panels from two layers between which ducts are formed by inflation, in which the inflation is effected by the use of a predetermined quantity of Freon in the liquid state, the subsequent evacuation of the Freon from the ducts being effected by evaporation.
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申请公布号 |
US4563230(A) |
申请公布日期 |
1986.01.07 |
申请号 |
US19840623349 |
申请日期 |
1984.06.22 |
申请人 |
C.G.A. COMPAGNIA GENERALE ALLUMINIO S.P.A. |
发明人 |
NOCIVELLI, LUIGI |
分类号 |
B21D53/04;(IPC1-7):B29C65/00 |
主分类号 |
B21D53/04 |
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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