Sheet forming apparatus for manufacturing two or multi-layered cardboard- or packing paper web using machine, has belt that directly incorporates one layer and indirectly incorporates another layer made of fiber material suspension

摘要

The sheet forming apparatus (1) has two flow boxes (4.1,4.2) for feeding a fiber material suspension (2), where a belt (7) has a label-free receiving side (7.S) with roughness (Rt) in a specific range. The belt directly incorporates a layer (L.1) made of the fiber material suspension and indirectly incorporates another layer (L.2) made of fiber material suspension. Another label-free belt (8) is provided to incorporate the latter or third layer made of fiber material suspension. The latter or third layer is transferred and delivered to the former label-free belt. An independent claim is included for a machine for producing two or multi-layered cardboard- or packing paper web, particularly two-or multi-layered graphic and equilateral cardboard web.