| 摘要 |
PCT No. PCT/JP85/00632 Sec. 371 Date Jun. 25, 1986 Sec. 102(e) Date Jun. 25, 1986 PCT Filed Nov. 13, 1985 PCT Pub. No. WO86/02961 PCT Pub. Date May 22, 1986.The present invention relates to a twin wire former. It aims at resolving the difficulties with respect to the retention of fine raw material and the coupling strength in the thicknesswise direction of a paper sheet without deteriorating the formation and without causing problems associated with high speed operation. A top wire (34) is partly provided with a portion in which a water-impermeable belt (35) travels along the inside of its loop. Dewatering in this portion is effected only on one side, that is, on the side of the bottom wire (33). Also in this portion, wrapping angles for the wires (33) and (34) are varied by adjusting the positions of a plurality of rolls (3), (17) and (23) or shoes (14) and (18) to improve the formation, and thereafter, dewatering on the side where dewatering has been suppressed by the above-mentioned belt (35) is also effected. |
