Patent · US Expired

Method for producing a pleatable filter material from a nonwoven fabric

US6656400B2 · kind B2 · utility

16Cited by

2References

22Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Klaus Veeser · Weinheim, DE
Anthony Hollingsworth · Birkenau, DE
Dirk Dantz · Königslutter am Elm, DE

Key dates

Filing date	Mar 28, 2001
Grant date	Dec 2, 2003
Priority date	—
Expiry date	Jan 30, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1049
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for producing a pleated filter material from a nonwoven fabric having spacers for the pleated folds formed from the filter material itself, a formed fabric made of stretched synthetic fibers and thermoplastic and/or thermally cross-linked binding agent being heated in an oven to a temperature lying at least in the softening temperature range and/or the cross-linking temperature range of the binding agent, and subsequently, the formed fabric being formed between profiled calender rolls and cooled simultaneously.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.