| 摘要 |
A method and machine for manufacturing a multilayer paper board which includes an outer web bonded to a base web has the features of initially forming the outer web on a planar section of a single wire where through a suitable structure a first dewatering stage of the web on the single wire is provided, a second dewatering stage being provided by way of a suitable dewatering show subsequent to the first dewatering stage with this second dewatering stage having an initial portion where dewatering takes place simultaneous in opposite directions and a final portion where dewatering takes place only outwardly away from the first wire. A second wire cooperates with the first wire at the second dewatering stage to provide a twin-wire web formation while forming a first sandwich structure which includes the first and second wires and the web therebetween, this first sandwich structure being guided along a convexly curved surface of the dewatering shoe at the second stage of dewatering and then being guided around a forming roll where additional dewatering takes place in a third dewatering stage. This first sandwich structure is guided tangentially from the forming roll and at a location beyond the latter the second wire is detached from the web while the first wire with the web adhering thereto travels to a solidification zone where a third wire which carries the base web is joined to the first wire with the outer web adhering thereto, the latter webs being pressed against each other at the solidification zone while a suitable structure cooperates with the first and third wires to urge toward each other at the solidification zone.
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