Method and apparatus for drying a fibrous web

An apparatus for drying a moving fibrous web, the fibrous web including one of a paper web, a cardboard web and a tissue web, the apparatus comprising:

• a hot air hood proximate to the moving fibrous web, the fibrous web moving in a direction of web travel;
• at least one suction equipped device proximate to the moving fibrous web;
• and
• a drying zone being defined as where the moving fibrous web is treated with hot air from said hot air hood and with steam, the steam being applied within said hot air hood, said drying zone incorporating a sucking zone of said suction equipped device, the apparatus having a steam blow device within said hot air hood configured to treat the fibrous web with the steam inside said drying zone prior to the moving fibrous web being treated with hot air from said hot air hood in the direction of web travel, the drying zone has a total length, the steam blow device being configured to treat the fibrous web as viewed in the direction of web travel with steam within a first half of the total length, the steam blow device being further configured to treat the fibrous web with steam at the beginning of the drying zone as viewed in the direction of web travel.

An apparatus for drying a moving fibrous web, the fibrous web including one of a paper web, a cardboard web and a tissue web, the apparatus comprising:

• a hot air hood proximate to the moving fibrous web;
• a suction device proximate to the moving fibrous web;
• a drying zone being defined as where the moving fibrous web is treated with hot air from said hot air hood, said drying zone extending through a sucking zone of said suction device, the apparatus including a steam blow device configured to treat the fibrous web with steam in at least some areas inside said drying zone;
• at least one permeable fabric, the fibrous web being covered by said at least one permeable fabric in the area of the drying zone;
• and
• a doctor blade positioned to remove an air boundary layer that is carried along by said at least one permeable fabric which covers the fibrous web before said at least one permeable fabric enters the drying area, the fibrous web being treated with steam within a first half of a total length of the drying zone in a direction of web travel, the fibrous web being treated with steam from within said hot air hood at least at a beginning of the drying zone relative to said direction of web travel.

A machine to produce a tissue web, comprising a drying apparatus having a drying zone where a moving fibrous web is treated with hot air, said drying apparatus including:

• a hot air hood defining the drying zone;
• and
• a suction device associated with the drying zone, the drying zone being defined as where the web is treated with hot air from said hot air hood, said drying zone extending through a sucking zone of said suction device, the apparatus being configured to treat the fibrous web with steam in at least some areas inside said drying zone;
• at least one permeable fabric, the web being covered by said at least one permeable fabric in the area of the drying zone;
• and
• a doctor blade positioned to remove an air boundary layer that is carried along by said at least one permeable fabric which covers the web before said at least one permeable fabric enters the drying zone, the fibrous web being treated with steam within a first half of a total length of the drying zone in a direction of web travel, the fibrous web being treated with steam at least at a beginning of the drying zone relative to said direction of web travel.