Apparatus fore cutting and threading a tail of a travelling web in a papermaking machine

摘要

An apparatus for cutting a tail in a web sheet traveling through a nip between the queen roll and king roll of a calender includes a waterjet positioned adjacent the edge of the web upstream from the nip for directing a jet of water towards the web and the queen roll. The waterjet cuts a tip or leader and creates a tail that continues to travel with the remainder of the web sheet towards and through the nip. The waterjet penetrates the web and splashes against the queen roll such that the wetted portion of the queen roll compresses against the leader of the tail to carry or pull the tail around the queen roll. A doctor blade is mounted in engagement with the queen roll in line with the tail to direct the tail away from the queen roll and towards the next section of the papermaking machine. Guide trays positioned downstream of the doctor blade guide the tail to the next section of the papermaking machine. The doctor blade can be mounted stationary against the queen roll.