The paper dedusting unit PEM and iPEM removes the paper dust which adheres to the paper-web and which would also foul the follow-on machines and digital printer. It works with compressed air. The micro particles are removed contact-free from the paperweb and are then collected in the exhaust air bin. If the speed of the web is low, the laminar flow is activated, which creates an optimal operation independent from the speed of the web. The sharp air jet takes off the dust from the surface like a planer. As a result of the process, the paperweb is cleaned on both sides in one process.