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:
Sep. 17, 2024
Filed:
Sep. 28, 2020
Hydac Process Technology Gmbh, Neunkirchen, DE;
Bernhard Schlichter, Saarbrücken, DE;
Martin Winter, Wadern, DE;
HYDAC PROCESS TECHNOLOGY GMBH, Neunkirchen, DE;
Abstract
The invention relates to a method of producing a multilayer filter medium, including at least the production steps of providing a woven fabric layer () having passage points () for fluid, providing a nonwoven layer of a spunbonded nonwoven () and having additional passage points () for fluid, and joining the two superimposed layers () along contact points () by melting the nonwoven layer () in such a way that while the additional passage points () enlarge, the molten spunbonded nonwoven material flows at least in part to the contact points () and then cumulatively curs there to produce firm connection points between the two layers ().