The Servall Top Former is a product of state -of -art technology from Walmsleys Ltd, UK and an extremely versatile forming unit, designed for new forming sections or as a retro - fit to existing fourdrinier wires. It brings many benefits, in terms of both capacity and quality, and is applicable across the whole range of paper and board grades. Because of its compact design, retrofitting is straightforward, and the unit can be easily integrated into existing frame and cantilever systems.
The Top Wire Former essentially comprises a second wire, brought down on top of the draining sheet, and a series of dewatering devices inside that second wire. This simple system immediately creates a new set of forming conditions, in which water is removed in both directions, and crucially, in which directed forces can act on individual fibres. It is this combination of water removal direction and generated forces that give the unit its major benefits.
The first benefit of the Top Wire Former is that it can dramatically increase the water handling capacity of the forming section. The limitations single wire fourdrinier in extracting water from sheet are overcome by Servall - Walmsleys Top former effectively. All the standard engineering interlocks including operational & safety have been employed in the design. The product is engineered to be of truly international standards.