Patent ID: 6247247
Filing Date: 2001-06-19
Classification: D21F

Abstract:
A drying section of a papermaking machine blow box assembly comprising:first and second drying cylinders for drying a moving web, and a wire for transporting the web running from said first cylinder to said second cylinder;a turning element, said wire passing around said turning element between said drying cylinders;a blow box positioned within a pocket defined by said cylinders, turning element, and wire within the papermaking machine drying section, said blow box ejecting air from said pocket and at least one of generating and maintaining an underpressure zone in at least part of said pocket;an interface between said underpressure zone and a volume outside said underpressure zone;at least one sealing element which has at least a portion which projects from said blow box toward said wire to a point a distance d from said wire, and which forms a seal between said underpressure zone and said outside volume at said interface including by blowing air from said blow box toward said wire; andsaid at least one sealing element connected to said blow box so that said at least a portion thereof may be moved away from said wire a distance d' which is greater than d.