Method and apparatus for producing a respiratory filter

Details Method and apparatus for producing a respiratory filter Method and apparatus for producing a respiratory filter

2007-10-30

2007-10-30

Lee, Edmund H. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

C264S274000, C264S275000, C264SDIG048, C128S205270, C096S147000, C096S154000

Reexamination Certificate

active

09837499

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.

REFERENCES:
patent: 4490321 (1984-12-01), Klinkau
patent: 4790306 (1988-12-01), Braun et al.
patent: 5817263 (1998-10-01), Taylor
patent: 6277178 (2001-08-01), Holmquist-Brown et al.
patent: 6776944 (2004-08-01), Kelman et al.

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