Preparation of bent mutiple tube
专利汇可以提供Preparation of bent mutiple tube专利检索，专利查询，专利分析的服务。并且PURPOSE: To manufacture a good bent multiple tube having no eccentricity and smooth surface at a low price, by maintaining mutual multiple tube at a concentric position and filling up molten wax in the space of the multiple tube and then, carrying out bending processing after cooling and solidifying the above wax.
CONSTITUTION: For example, one end of the multiple tube 3 obtained by maintaining two strainght tubes 1 and 2 at a concentric position, is shut tightly by the end board 4 and next, the liquid paraffin 5 is cooled and solidified in the tube after pouring and filling up fused liquid paraffin in each space 7 and 8 of the tube 3. Bending processing of thus obtained tube 3 in necessary shape, is carried out by already known suitable method. Divergence and eccentricity are not produced at mutual position of the tube during bending processing and bending formation of the bent multiple tube 8 is able to carry out maintaining concentric position at the same interval along the whole length. The paraffin 5 is fused by suitable heating after bending processing and is recovered by flowing out of tube and then, is used repeatedly.
COPYRIGHT: (C)1980,JPO&Japio，下面是Preparation of bent mutiple tube专利的具体信息内容。
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