Nonwoven web and method of making same

US11655571B2 · kind B2 · utility

Assignee

• REIFENHÄUSER GMBH & CO. KG MASCHINENFABRIK · DE

Inventors

• Detlef Frey · Niederkassel, DE
• Hans-Georg Geus · Niederkassel, DE
• Michael Maas · Schnorbach, DE
• Martin Neuenhofer · Rösrath, DE
• Michael Nitschke · Rübhausen, DE
• Christine Noack · Cologne, DE
• Hartmut Kopp · Troisdorf, DE

Key dates

• Filing date: Sep 30, 2019
• Grant date: May 23, 2023
• Expiry date: Feb 11, 2042

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21G1/00
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A nonwoven web is made by first depositing fibers as a nonwoven web in a deposition area, then conveying the web away from the deposition area in a web-travel direction, preconsolidating the web in the path, and passing the preconsolidated web between a pair of rollers that compress and final consolidate the preconsolidated web, One of the rollers is separated from the web such that final consolidation of the web at a starting level is stopped and at the same time or immediately beforehand upstream preconsolidation of the web increased. After separating the one roller from the web, another roller is engaged with the web at the consolidation station and then final consolidation is recommenced, whereupon upstream preconsolidation of the web is reduced back to the starting level.