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US 7,662,260 B2Granted
Method for the manufacture of a fiber web provided with a three-dimensional surface structure
AssigneeVoith Patent GmbH
InventorsThomas Thoroe-Scherb, Harald Schmidt-Hebbel, Jeffrey Herman
Life of this patent
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Abstract
A method for the manufacture of a structured fiber web including the steps of pressing a fiber web onto an imprinting fabric by way of a first pressure field, thereby pre-imprinting the fiber web, the fiber web having a dry content of less than approximately 35%, and subsequently pressing the fiber web onto the imprinting fabric by way of a further pressure field.
Claims74
A method for the manufacture of a structured fiber web, comprising the steps of:
- pressing a fiber web onto an imprinting fabric by way of a first pressure field, thereby pre-imprinting said fiber web, said fiber web having a dry content of less than approximately 35%;
- subsequently pressing said fiber web onto said imprinting fabric by way of a further pressure field for further dewatering and drying to thereby fix a three-dimensional surface structure and strength of the fiber web;
- delivering the fiber web to a drying cylinder by said imprinting fabric;
- and
- exposing the fiber web to air moved by at least three throughflow apparatuses, each of said at least three throughflow apparatuses having a corresponding throughflow direction, at least one of said throughflow directions being different than an other throughflow direction, said first pressure field being a suction element that is arranged along the side of the imprinting fabric with the fiber web on an opposite side of the imprinting fabric.
2 more elements
Dependencies are inferred from the claim text.