Shortened layout from dryer to reel in tissue machine
AssigneeMetso Paper Karlstad AB
InventorAnders Tommy Lindén
Life of this patent
Estimating the term…
Abstract
A dry end of a tissue machine is made shorter by close-coupling a reel-up to the drying section and supporting the web from the drying section to the reel-up by a foil or a belt such that web stability is maintained, thus allowing high-speed operation. The foil's downstream edge can form a nip with the paper roll and nip load can be controlled by controlling pivotal movement of the foil. The reel-up can include a calendering belt for calendering the web as it passes through a nip between the belt and a reel drum supported on the belt, and a rotatable reel spool on which a paper roll is wound in nipping engagement with the reel drum. Alternatively, the reel drum can be eliminated and the paper roll can be supported on the belt. A composite shaftless core for winding is also disclosed.
Claims17
An apparatus for a dry end of a papermaking machine having a dryer for drying a paper web, the apparatus comprising:
- a stabilizing foil assembly for supporting and stabilizing the paper web exiting the dryer, the foil assembly having an upstream edge and a downstream edge;
- and
- a driven reel spool for winding the paper web thereon in a winding operation so as to form a paper roll, the reel spool being positioned in a winding position such that the downstream edge of the foil assembly forms a nip with the paper roll wound on the reel spool, the reel spool and foil assembly being relatively movable for controlling a nip load at the nip.
A method for winding a traveling paper web after the web exits from a dryer, the method comprising:
- stabilizing the traveling web as the web travels downstream from the dryer with a stabilizing foil disposed after the dryer,
- the foil being positioned such that a downstream edge of the foil forms a nip with a rotating paper roll in a winding position onto which the web is wound;
- and
- passing the web through the nip as the web is wound onto the paper roll.
Dependencies are inferred from the claim text.