Enclosure ventilation filter and assembly method
Inventors
Keleny, Lloyd G. • KALAYCI, VELI E. • Hebert, Michael J. • Elsayed, Yehya A. • Mulder, David W. • Dallas, Andrew J.
Assignees
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Publication Number
US-11925573-B2
Publication Date
2024-03-12
Expiration Date
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.
Core Innovation
The invention relates to adsorbent breather ventilation filter assemblies for an enclosure. A filter assembly includes an enclosure side and a side opposite from the enclosure side, a first layer that is gas permeable, and an adsorbent layer comprising adsorbent particles. The adsorbent layer uses adsorbent particles such as activated carbon uniformly dispersed in a fine fiber web, such as electrospun polymeric fine fibers.
The enclosure-side attachment is formed with an adhesive zone and a weld area adjacent to at least a portion of the adhesive zone. The adhesive zone has an outer adhesive perimeter, and the weld area is heat-sealable to the enclosure at the weld area. The attachment geometry is positioned relative to an exit opening, and embodiments describe a surrounding or adjacent weld zone together with the adhesive zone.
For ostomy use, an ostomy bag defines a stoma opening and a vent opening, and an ostomy filter is attached to cover the vent opening. The ostomy filter includes a first layer that is gas permeable and liquid impermeable, and an adsorbent layer comprising adsorbent particles. The ostomy filter is attached at an adhesive zone that includes an inner adhesive perimeter surrounding an exit opening, combined with a heat-sealable weld area at the adhesive zone.
Claims Coverage
The partial content identifies three independent claims. Across these claims, the inventive features include a gas-permeable/adsorbent layered filter assembly with an adhesive zone and adjacent weld area for heat sealing to an enclosure, an ostomy bag with an attached ostomy filter covering a vent opening, and a system of multiple such filter assemblies positioned on a release liner.
Gas-permeable first layer with adsorbent particles and enclosure-side adhesive zone plus weld for heat sealing
An enclosure-side filter assembly comprising a first layer which is gas permeable and an adsorbent layer comprising adsorbent particles, wherein the enclosure side comprises an adhesive zone having an outer adhesive perimeter and a weld area adjacent to at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the enclosure at the weld area.
Ostomy bag with vent-covering ostomy filter attached by adhesive zone surrounding an exit opening and adjacent heat-sealable weld area
An ostomy filter attached to an ostomy bag to cover a vent opening, wherein the ostomy filter comprises a bag side secured to the ostomy bag, a first layer which is gas permeable and liquid impermeable, an adsorbent layer of adsorbent particles, an adhesive zone having an outer adhesive perimeter and an inner adhesive perimeter with the inner adhesive perimeter surrounding an exit opening, and a weld area adjacent to at least a portion of the adhesive zone, where the filter is heat-sealable to the ostomy bag at the weld area.
System of multiple enclosure filter assemblies on a release liner with adhesive zone and adjacent heat-sealable weld area
A system comprising a release liner and a plurality of filter assemblies located on the release liner, each filter assembly comprising a first layer which is gas permeable and an adsorbent layer comprising adsorbent particles, wherein the enclosure side comprises an adhesive zone having an outer adhesive perimeter and a weld area adjacent to at least a portion of the adhesive zone, where the filter assembly is heat-sealable to the ostomy bag at the weld area.
The independent claims are directed to layered adsorbent filter assemblies and ostomy-filter integration, emphasizing an enclosure-side adhesive zone with an outer perimeter and a weld area adjacent to at least part of the adhesive zone for heat sealing. In the ostomy claim, the adhesive zone additionally includes an inner adhesive perimeter that surrounds an exit opening, while the first layer is defined as gas permeable and liquid impermeable.
Stated Advantages
Higher breakthrough times.
Low pressure drop.
Improved adsorption capacity/utilization.
Binder minimization.
Improved conformability.
Documented Applications
Adsorbent breather ventilation filter assemblies for an enclosure, including ostomy bags for covering a vent opening.
An ostomy filter attached to an ostomy bag defining a stoma opening and a vent opening.
A system of filter assemblies located on a release liner.
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