Patent · US Expired

Method and apparatus for producing a respiratory filter

US7288223B2 · kind B2 · utility

4Cited by

5References

19Claims

0Family size

Assignee

Auergesellschaft GmbH · DE

Inventors

Frank Becker · Munich, DE
Martin Kurth · Kandern, DE
Thomas Krugerke · Berlin, DE

Key dates

Filing date	Apr 18, 2001
Grant date	Oct 30, 2007
Priority date	—
Expiry date	Dec 13, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S264/48
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A method and apparatus in which a granular adsorbent, absorbent, chemisorptive, or catalytic material, particularly activated carbon is intermixed with (a) meltable polymer(s), and that the resulting mixture is heated under pressure and pressed into a molded piece (2). We propose to heat the mixture under pressure in a connecting part for a respirator or fan filter unit or in a connecting part (1) for an adapter for a respirator or fan filter unit, thereby positively and/or non-positively compacting it with said connecting part, and to make the connection between said connecting part (1) and said compacted mixture gastight.

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