Filter means for sealed glazing units

E - Fixed Constructions – 06 – B

Patent

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Details

E06B 3/66 (2006.01) E06B 3/677 (2006.01)

Patent

CA 2555225

Filter means for use with a glazing panel comprising at least an exterior pane and an interior pane and means supporting the perimeters of the panes to provide an internal air space therebetween, either of the panes having a through hole, the filter means is adapted to attach to the pane having the through hole and filter air passing through the hole, the filter means comprises a patch having one or more thin slits therein, the width of the one or more slits being narrow enough to limit ingress of moisture droplets from ambient air when the temperature and pressure of the air in the air space are less than ambient and wide enough to permit the egress of moisture-laden air from the air space when the air space temperature and pressure are elevated relative to ambient and the overall length of the one or more slits being determined so as to provide a required open area for the filter means.

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