Air filter assembly
First Claim
1. An air filter assembly for an air circulating system comprising a peripheral frame adapted to be supported in communication with an intake opening in a return air duct, a polyfoam filter mounted in said frame, a paper filter engaged with an inlet surface of the polyfoam filter to remove particulate material from air passing through the polyfoam filter, said frame having inwardly facing generally channel-shaped guides at opposite edges thereof receiving edges of the paper filter, said paper filter being provided on a supply roll at one edge of the polyfoam filter, means mounting the supply roll from the frame, the paper filter including a free end at the edge of the frame opposite to the supply roll to enable the free end of the paper filter to be moved to move a used segment of the paper filter outwardly of the polyfoam filter and aligning an unused segment of the paper filter with the polyfoam filter.
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Accused Products
Abstract
An air filter assembly and more specifically the use and combination of a relatively inexpensive and easily replaced paper filter associated with a conventional polyfoam or fiberglass filter conventionally employed in an intake of an air duct system associated with an air conditioning system or air heating system utilized in homes, offices and the like. Specifically, the air filter assembly includes a rolled filter paper that is drawn across the upstream side of a polyfoam filter or fiberglass filter which acts as a support for the filter paper with the paper filter being replaced periodically by moving a new segment of paper filter from the paper supply roll to a position in alignment with and in engagement with the polyfoam filter and disposing of the used paper filter. An inspection window is provided in the air intake louver door normally provided in air conditioning/heating systems to enable the condition of the paper filter to be observed to determine if the paper filter should be changed. In one embodiment, the paper filter is manually pulled to move a new segment into alignment with the polyfoam filter. In another form, the paper filter is moved from a supply roller into a take-up roller in the canister by a drive assembly which provides automatic movement of the paper filter at predetermined intervals.
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Citations
8 Claims
- 1. An air filter assembly for an air circulating system comprising a peripheral frame adapted to be supported in communication with an intake opening in a return air duct, a polyfoam filter mounted in said frame, a paper filter engaged with an inlet surface of the polyfoam filter to remove particulate material from air passing through the polyfoam filter, said frame having inwardly facing generally channel-shaped guides at opposite edges thereof receiving edges of the paper filter, said paper filter being provided on a supply roll at one edge of the polyfoam filter, means mounting the supply roll from the frame, the paper filter including a free end at the edge of the frame opposite to the supply roll to enable the free end of the paper filter to be moved to move a used segment of the paper filter outwardly of the polyfoam filter and aligning an unused segment of the paper filter with the polyfoam filter.
Specification