Advanced dewatering system
AssigneeVoith Patent GmbH
InventorsJeffrey Herman, Thomas Thoroee Scherb, Luiz Carlos Silva, Hubert Walkenhaus
Life of this patent
Estimating the term…
Abstract
System for drying a tissue or hygiene web. The system includes a permeable structured fabric carrying the web over a drying apparatus. A permeable dewatering fabric contacts the web and is guided over the drying apparatus. A mechanism is used to apply pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
Claims82
A system for drying a tissue or hygiene web, comprising:
- a permeable structured fabric carrying the web over a drying apparatus;
- a permeable dewatering fabric contacting the web and being guided over the drying apparatus;
- and
- a compressibility of the permeable structured fabric being lower than that of the permeable dewatering fabric;
- and
- a mechanism for applying pressure, via a movable pressure surface, to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus,
- wherein a negative pressure is applied to the permeable dewatering fabric such that air flows first through the permeable structured fabric, then through the web, and then through the permeable dewatering fabric and into the drying apparatus.
A system for drying a web, comprising:
- a permeable structured fabric carrying the web over a vacuum roll;
- a permeable dewatering fabric contacting the web and being guided over the vacuum roll;
- a compressibility of the permeable structured fabric being lower than that of the permeable dewatering fabric;
- and
- a mechanism for applying pressure first to the permeable structured fabric, then the web, and then the permeable dewatering fabric at the vacuum roll.
Dependencies are inferred from the claim text.