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:
May. 11, 2021
Filed:
May. 27, 2019
Detlef Frey, Niederkassel, DE;
Tristan Tiedt, Cologne, DE;
Michael Nitschke, Koenigswinter, DE;
Martin Neuenhofer, Roesrath, DE;
Hans-georg Geus, Niederkassel, DE;
Detlef Frey, Niederkassel, DE;
Tristan Tiedt, Cologne, DE;
Michael Nitschke, Koenigswinter, DE;
Martin Neuenhofer, Roesrath, DE;
Hans-Georg Geus, Niederkassel, DE;
REIFENHAEUSER GMBH & CO. KG MASCHINENFABRICK, Troisdorf, DE;
Abstract
An apparatus for making spunbonded nonwoven has a spinneret for emitting the continuous filaments in a filament-travel direction, a cooling chamber downstream in the direction from the spinneret and receiving the filaments, and two air-supply manifolds flanking the chamber for feeding cooling air thereinto transverse to the direction. A flow straightener for equalizing flow of the cooling air on the filaments is provided in at least one of the air-supply manifolds and has passage walls forming a plurality of flow passages that extend transversely to a filament-travel direction. A flow cross section of the flow straightener is greater than 85% (preferably more than 90%) of a cross-sectional size of the straightener, a ratio of a length L of the flow passages to an inner diameter Dof the flow passages L/Dis 1 to 15.