Apparatus fore cutting and threading a tail of a travelling web in a papermaking machine
OwnerRoman C. Casparinventor
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OwnerRoman C. Casparinventor
Estimating the term…
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.
An apparatus for chopping a first tail in a web in a first section of a papermaking machine and for guiding the first tail downstream to a next section of the papermaking machine, the first section having a first roll positioned relative to a second roll to form a nip therebetween through which and in direct contact therewith said web passes and follows the first roll, the improvement comprising:
An apparatus for chopping a first tail in a web in a calender section of a papermaking machine and for guiding the first tail downstream to a next section, the calender section having a queen roll positioned vertically above a king roll to form a nip therebetween through which and in direct contact therewith said web passes and follows the king roll, the improvement comprising:
Dependencies are inferred from the claim text.