Enclosure ventilation filter and assembly method

Patent metadata

Field	Value
Publication number	US-10646370-B2
Application number	US-201514624202-A
Country	US
Kind code	B2
Filing date	Feb 17, 2015
Priority date	Apr 1, 2008
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A filter assembly for an enclosure, particularly for an ostomy bag, is described having an enclosure side, a first layer which is gas permeable, and an adsorbent layer comprising adsorbent particles dispersed in a fine fiber web. The enclosure side of the filter assembly includes an adhesive zone in which adhesive is present having an outer adhesive perimeter and a weld area surrounding at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the enclosure at the weld area. A method of assembly is also described.

First claim

What is claimed is:

1. A filter assembly for an enclosure, comprising:
an enclosure side and a side opposite from the enclosure side;
a first layer which is gas permeable; and
an adsorbent layer comprising adsorbent particles;
wherein the enclosure side of the filter assembly comprises:
an adhesive zone in which adhesive is present having an outer adhesive perimeter;
a weld area surrounding at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the enclosure at the weld area.

2. The filter assembly of claim 1 , wherein the adhesive zone has an inner adhesive perimeter that defines an exit window portion that is completely surrounded by the adhesive zone.

3. The filter assembly of claim 2 , wherein the weld area completely surrounds the adhesive zone.

4. The filter assembly of claim 3 , wherein the adhesive zone is a first sealing zone and the weld area is a second sealing zone.

5. The filter assembly of claim 3 , wherein the first layer is sealed to the enclosure at the weld area.

6. The filter assembly of claim 5 , wherein the enclosure is a flexible bag comprising plastic.

7. The filter assembly of claim 3 , wherein the weld area is adjacent to the adhesive zone along the outer adhesive perimeter.

8. The filter assembly of claim 1 , wherein the first layer is microporous.

9. The filter assembly of claim 1 , wherein the adsorbent layer comprises activated carbon and is substantially free of binder material.

10. The filter assembly of claim 1 , wherein the adsorbent layer comprises about 1 to 30 weight percent fine fiber having a fiber diameter of about 0.001 to 5 micron and 70 to 99 weight percent adsorbent particles.

11. The filter assembly of claim 1 further comprising a second layer that is gas permeable and liquid impermeable, wherein the adsorbent layer is sandwiched between the first layer and the second layer.

Assignees

• Donaldson Co Inc

Inventors

• Keleny Lloyd G
• Kalayci Veli E
• Hebert Michael J
• Elsayed Yehya A
• Mulder David W
• Dallas Andrew J

Classifications

• A61F5/441 Primary

  having {venting or} deodorant means, e.g. filters {; having antiseptic means, e.g. bacterial barriers} · CPC title

• B01D2253/00

  Adsorbents used in seperation treatment of gases and vapours · CPC title

• B01D69/147

  containing embedded adsorbents · CPC title

• B01D46/00

  Filters or filtering processes specially modified for separating dispersed particles from gases or vapours (filtering elements B01D24/00-B01D35/00; filtering material B01D39/00; their regeneration outside the filters B01D41/00) · CPC title

• B01D39/00

  Filtering material for liquid or gaseous fluids · CPC title