Patent ID: 6158387
Filing Date: 2000-12-12
Classification: A01K,B01D,F24F

Abstract:
A filter cap for an open-top cage comprising:a substantially rigid bonnet adapted to cover the open top of the open top cage, the bonnet having a body portion with a perforated top and side walls extending therefrom forming an open bottom end,a substantially rigid filter retainer sized to fit upon the bonnet and to substantially cover the perforated top of the bonnet, the filter retainer having a top end with perforations substantially coextensive with the perforations in the top of the bonnet, the filter retainer also having side walls extending from the top end thereof forming an open bottom end, the perforations in the filter retainer being substantially in alignment with the perforations in the bonnet when the filter retainer is mounted on the top of the bonnet; andsecurement means for detachably securing the filter retainer to the bonnet to permit enclosure of a sheet of filter material therebetween, the securement means being integrally formed in the bonnet and the filter retainer.