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:
Jun. 30, 2020
Filed:
Jan. 19, 2017
Daramic, Llc, Charlotte, NC (US);
Daniel Dreyer, Mackenheim, FR;
Jean-Martial Caublot, Ebersheim, FR;
Daramic, LLC, Charlotte, NC (US);
Abstract
The invention relates to a separator material () for forming a separator for a lead-acid accumulator, especially in the form of unfinished rolled product, and a method for the production thereof. The inventive separator material () comprises a first layer in the form of a microporous film () and at least one second layer in the form of a planar fleece material (). At least one face of the microporous film (), which is made of a thermoplastic material, is provided with a number of protrusions (') defining an area with an increased film thickness on a basic film sheet. The fleece material () is welded to the film () by means of ultrasonic welding in such a way that the planar fleece material () is located at least at the level of the surface of the basic film sheet without invading the same in the area of the welded joints ().