Advanced dewatering system
AssigneeVoith Patent GmbH
InventorsThomas Thoröe Scherb, Hubert Walkenhaus, Jeffrey Herman, Luiz Carlos Silva
Life of this patent
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Abstract
A system for drying one of a tissue and a hygiene web including a drying apparatus, a permeable structured fabric, a permeable dewatering fabric and a mechanism for applying pressure. The permeable structured fabric carries the web over the drying apparatus. The permeable dewatering fabric contacts the web and is guided over the drying apparatus. The mechanism for applying pressure, applies pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus.
Claims77
A system for drying one of a tissue and a hygiene web, comprising:
- a drying apparatus;
- a permeable structured fabric carrying the web over said drying apparatus;
- a permeable dewatering fabric contacting the web and being guided over said drying apparatus, said permeable dewatering fabric includes a vector layer which contains fibers which are equal to or greater than approximately 67 dtex;
- and
- a mechanism for applying pressure to said permeable structured fabric, the web, and said permeable dewatering fabric at said drying apparatus.
A system for drying a web, comprising:
- a vacuum roll:
- a permeable structured fabric carrying the web over said vacuum roll;
- a permeable dewatering fabric contacting the web and being guided over said vacuum roll, said permeable dewatering fabric including a vector layer which contains fibers which are equal to or greater than approximately 67 dtex;
- and
- a mechanism for applying pressure to said permeable structured fabric, the web, and said permeable dewatering fabric at said vacuum roll.
A method of drying a web comprising the steps of:
- providing a system including:
- a vacuum roll:
- a permeable structured fabric carrying the web over said vacuum roll;
- a permeable dewatering fabric contacting the web and being guided over said vacuum roll, said permeable dewatering fabric including a vector layer which contains fibers which are equal to or greater than approximately 67 dtex;
- and
- a mechanism for applying pressure to said permeable structured fabric, the web, and said permeable dewatering fabric at said vacuum roll;
- moving the web on said permeable structured fabric over said vacuum roll;
- guiding said permeable dewatering fabric in contact with the web over said vacuum roll;
- applying mechanical pressure to said permeable structured fabric, the web, and said permeable dewatering fabric at said vacuum roll;
- and
- suctioning during said applying step said vacuum roll, said permeable structured fabric, the web, and said permeable dewatering fabric.
A method of drying a paper web in a press arrangement, the method comprising the steps of:
- moving the paper web, disposed between at least one first fabric and at least one second fabric, between a support surface and a pressure producing element, at least one of said first fabric and said second fabric including a vector layer which contains fibers which are equal to or greater than approximately 67 dtex;
- and
- moving a fluid through the paper web, the at least one first and second fabrics, and said support surface.
A method of pressing and drying a paper web, the method comprising the steps of:
- pressing, with a pressure producing element, the paper web between at least one first fabric and at least one second fabric, at least one of said first fabric and said second fabric including a vector layer which contains fibers which are equal to or greater than approximately 67 dtex;
- and
- simultaneously moving a fluid through the paper web and the at least one first and second fabrics.
Dependencies are inferred from the claim text.