Patent · US Expired

Method and apparatus for producing a filter material

US6364978B1 · kind B1 · utility

8Cited by

4References

9Claims

0Family size

Assignee

Moldex-Metric, Inc. · US

Inventors

Martin Skov · Neckartenzlingen, DE
Heinz Wandel · Neckartenzlingen, DE

Key dates

Filing date	Sep 2, 1999
Grant date	Apr 2, 2002
Priority date	—
Expiry date	Sep 2, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1084
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method and an apparatus for producing a thermoplastic filter material laid in folds, with the folds fixed in close vicinity. The thermoplastic filter material which has been heated for forming the folds is accumulated within a cooling path such that the folds are pushed together and fixed by cooling with respect to their shape.

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