Filter for attachment to an ostomy bag

Abstract From the Canadian patent

A three part filter is provided for attachment to an ostomy bag. One part includes a synthetic plastics base member having a central aperture and one flat surface whereby the filter can be attached to the bag wall. There are two walls upstanding from the other side of the base member to define a channel. The inner wall defines a shallow recess. The second part is a pad of filtering medium. The third part is a lid member of synthetic plastics material,with apertures through its top wall; the lid being a snug push fit within the channel. With this arrangement the lid member is readily removable to allow replacement of the filter pad.