公开(公告)号：US3906064A

公开(公告)日：1975-09-16

申请号：US33158973

申请日：1973-02-12

Applicant: LITTLE INC A

Inventor： IANNAZZI FRED D ,  RAFFERTY JOHN W ,  SPARROW DONALD B ,  STRAUSS RICHARD

IPC: B01D47/00

CPC classification number: D04H1/736 ,  D04H1/425 ,  D21F1/0018

Abstract: Process and apparatus for dry forming paper from gas-dispersed fibers. The gas-fiber mixture is circulated in a loop which incorporates a converging-diverging section and a converging choke section and a portion of the fibers is withdrawn for web formation at a point between the converging-diverging section and the choke section. The fibers in the loop are circulated in the loop at a rate which is at least twice the rate that fibers are introduced and withdrawn from the loop. The paper web is formed on the underside of a papermaking wire. Fine particulate materials may be added and the moisture content of the air and fibers may be controlled.

Abstract translation: 从气体分散纤维干燥成型纸的工艺和设备。 气体纤维混合物循环，其中包括会聚发散部分和会聚扼流部分，并且在会聚 - 发散部分和扼流部分之间的一点处退出纤维的一部分用于卷材形成。 回路中的纤维以循环中的纤维循环速率至少是纤维被引入并从环中取出的速率的两倍。 纸幅形成在造纸线的下侧。 可以添加细颗粒材料，并且可以控制空气和纤维的水分含量。