Patent ID: 6936138

Claim:
An apparatus for incorporating feature substances into a paper web at a place in a paper machine where a bulk of the liquid is already withdrawn from the original paper pulp such that the paper web is still moist but already consolidated, comprising: a volume for receiving a feature substance suspension comprising a feature substance suspended in a suspending medium; one or more nozzles communicating with the volume; a device for controlling a pressure at which a feature substance suspension fraction withdrawn from the volume is directed onto the paper web through the nozzles, the feature substance suspension fraction having a low pressure at an inlet side of the nozzles; and a suction device for sucking the suspending medium through the paper web, the suction device located on a side of the paper web opposite the nozzles and following the nozzles in the transport direction of the paper web; wherein the pressure control device and the nozzles are so formed and mutually coordinated that the feature substance suspension fraction is adjustable as a laminar jet leaving the nozzles.