Mitsubishi Heavy Industries Limited

Toray Industries, Inc.

Akimine Izawa

Tetsuo Makino

Keiichi Fujiki

Hiroshi Odani

Toshihiro Ito

To smooth the surface of a flow sheet that is used in a paper machine and make the flow sheet easy to handle, reinforced fibers are disposed in a mold. The entire moldis covered with enclosing membersso that an enclosed spaceis formed inside the enclosing members. While air in the enclosed spaceis being suctioned through one end of the enclosed space, matrix resin is supplied to the reinforced fibers through the other end of the enclosed spaceto impregnate the reinforced fibers with the matrix resin, and the matrix resin is hardened, whereby there is obtained a flow sheet whose surface smoothness is 0.25 &#x3bc;m or less in terms of arithmetical mean roughness.

Flow sheet for paper machine and method of manufacturing the same

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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Mihara, Japan

Akimine Izawa