Process and a decker for bringing together two suspension layers

Process and decker for bringing together a first aqueous pulp suspension layer with at least one additional suspension layer. The process includes moving the first pulp suspension layer and the at least one additional suspension layer on moving layer supports, and guiding sides of the first pulp suspension layer and the at least one additional suspension layer that are adapted to contact each other on guiding surfaces that are one of stationary and limitedly moving. The guide surfaces include contoured surfaces arranged to run substantially parallel to the layer supports. The process further includes applying the at least one additional suspension layer onto the first pulp suspension layer at a wedge-shaped gap, and draining the first pulp suspension layer and the at least one additional suspension layer. The decker includes at least one rotating cylinder, and an endless wire guided around at least a portion of an outer circumference of the at least one rotating cylinder. The at least one rotating cylinder and the endless wire form a wedge-shaped gap. The decker also includes a first suspension introducing device for introducing a first suspension layer into the wedge-shaped gap, a displacer arranged upstream from the wedge-shaped gap that includes first and second guide surfaces, in which the first guide surface is arranged to be substantially parallel to a portion of the outer circumference of the at least one rotating cylinder adjacent thereto and the second guide surface is arranged to be substantially parallel to a portion of the endless wire adjacent thereto. At least one second suspension introducing device for introducing at least one second suspension layer into the wedge-shaped gap is also provided. The at least one second suspension introducing device is positioned to introduce the at least one second suspension layer upstream of the wedge-shaped gap and between the at least one rotating cylinder and the displacer.