发明名称 MULTI-LAYER PIPE AND METHOD FOR ITS MANUFACTURE
摘要 A method for manufacture of a multi-layer pipe (5) by means of a bending roller with individual material layers (1, 2) to be combined into the multi-layer pipe (5) being put onto each other, and the multi-layer material thus formed being shaped into a multi-layer pipe (5) by means of the bending roller, and in the final stage of pipe shaping in the bending roller and/or a subsequently used bending machine a material layer (1) acting as an internal pipe being pressed non-positively into a material layer (2) acting as an external pipe.
申请公布号 US2009293981(A1) 申请公布日期 2009.12.03
申请号 US20090499437 申请日期 2009.07.08
申请人 BERGROHR GMBH SIEGEN 发明人 BERG BERND
分类号 F16L9/18;B21C37/14;F16L9/14 主分类号 F16L9/18
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