Abstract: A variable frequency foil (VFF) box assembly and mechanisms for moving individual foils/foil beams and individual foil beam sets relative to each other to adjust the frequency of a paper making machine, and method of use are provided. The VFF box assembly allows for continuously and uniformly adjusting the pitch distances of individual foils within foil sets over a finite range, and also adjusting the distance between foil sets during the continuous operation of a paper making machine.

Abstract: A testing device for determining the amount of liquid having been doctored through the Fourdrinier fabric or wire at the wet end of a Fourdrinier-type paper machine. Included is a pick-up for insertion beneath the foil blades of the paper machine, having an opening for insertion into the stream of the liquid being doctored from the pulp. A container is connected in liquid communication with the pick-up. A weir is positioned within the container to divide the container into a collection well upstream from the weir and a discharge well downstream from the weir. The container includes a still well positioned in liquid communication with the collection well. A proximity sensor is provided, and positioned with respect to the still well to sense the level of liquid in the still well. A microprocessor controlled display is provided for receiving a signal from the proximity sensor and displaying a flow rate based on the level of the liquid in the still well.