The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 25, 2025
Filed:
May. 23, 2023
Michael Nitschke, Koenigswinter, DE;
Martin Neuenhofer, Roesrath, DE;
Hans-georg Geus, Niederkassel, DE;
Detlef Frey, Niederkassel, DE;
Michael Nitschke, Koenigswinter, DE;
Martin Neuenhofer, Roesrath, DE;
Hans-Georg Geus, Niederkassel, DE;
Detlef Frey, Niederkassel, DE;
REIFENHAEUSER GMBH & CO. KG MASCHINENFABRIK, Troisdorf, DE;
Abstract
A spunbonded nonwovens is made by first spinning thermoplastic continuous filaments and emitting them from a spinneret in a direction and then passing the filaments in the direction through a cooling chamber. Meanwhile cooling air is fed from respective manifolds flanking the chamber into the chamber to cool the filaments and the cooling air is guided into the manifolds through respective manifolds and through respective planar homogenizing elements each having a plurality of openings forming a free open surface area constituting 1 to 40% of the total surface area of the respective planar homogenizing element. The cooling air passes from the planar homogenizing element into the cooling chamber through a flow straightener.