发明名称 |
Tube bank structure, and flow tube producing method |
摘要 |
The invention provides tube bank structure and a method of manufacturing a flow tube, which can improve the stabilization of the flow of stock in the tube bank of the headbox of a papermaking machine and prevent the development of turbulence and uneven concentration of stock flow by a simple and inexpensive means, resulting in speedup of papermaking process. Said flow tubes has a smaller diameter pipe portion of a circular cross-section in the inlet side, a larger diameter pipe portion connected to said smaller diameter pipe portion, a tapered pipe portion, and a rectangular pipe portion, the cross-sectional configuration of said tapered pipe portion being changed smoothly from circular to rectangular configuration.
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申请公布号 |
US6902651(B2) |
申请公布日期 |
2005.06.07 |
申请号 |
US20030275962 |
申请日期 |
2003.05.27 |
申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD. |
发明人 |
FUJIKI KEIICHI;MAKINO TETSUO;IZAWA AKIMINE |
分类号 |
D21F1/02;D21F1/06;(IPC1-7):D21F1/00 |
主分类号 |
D21F1/02 |
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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