Patent ID: 8979965
Filing Date: 2015-03-17
Classification: B01D

Abstract:
1. A filter attachment apparatus for temporarily attaching a rigid, rectangular, replaceable air filter to a face of a rectangular box fan having a metal frame, the apparatus comprising: a rigid, rectangular, substantially planar, disposable, forced-air furnace type air filter comprising a planar front face, a top edge, side edges essentially perpendicular to the top edge, and a bottom edge, and a plurality of substantially flat magnetic flaps foldably secured to the air filter in association with the top and side edges of the air filter with at least one of the magnetic flaps associated with each of the top and side edges of the air filter, the magnetic flaps comprising outer free edge portions comprising magnetic attachment means on inner faces thereof, the magnetic flaps having a forward-folded orientation essentially perpendicular to the front face of the air filter with the outer free edge portions extended beyond the front face of the air filter with their inner faces adjacent and perpendicular to the front face of the air filter.