发明名称 |
UN PROCEDIMIENTO PARA PRODUCIR CUERPOS HUECOS DE PAREDES DELGADAS. |
摘要 |
<p>A process for manufacturing a hollow body having a nondevelopable form from a single piece of starting material which is flexible and which is either flat or in a developable form. The process involves the formation of folds or corrugations in the starting material and the subsequent shaping of same into a nondevelopable form with an accompanying unfolding of the corrugations thereby providing the additional length of material needed to satisfy the nondevelopable form.</p> |
申请公布号 |
ES375799(A1) |
申请公布日期 |
1972.04.16 |
申请号 |
ES19990003757 |
申请日期 |
1970.01.14 |
申请人 |
PIRELLI, S. P. A. |
发明人 |
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分类号 |
B29D22/00;B29D22/02;B29D30/22;(IPC1-7):29D/ |
主分类号 |
B29D22/00 |
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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