Electronic air filtration system

DETAILED DESCRIPTION The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows: 1.
In a charged media air filtration system, an air filter including a disposable air filter cartridge and an air filter cartridge support frame for receiving said cartridge comprising, in combination: a pair of opposing electrically conductive outer screens; a pair of dielectric fibrous filter pads each having side surfaces and disposed between said outer screens; an electrically conductive inner screen having a peripheral edge and sandwiched between said fibrous filter pads, said filter pads overlapping one another and extending outwardly beyond the perimeter of said inner screen and including a marginal border at the peripheral edge of said screen such that said filter pads surround and insulate said inner screen; electrode means piercing a side surface of at least one of said fibrous filter pads for electrically connecting said inner screen to a high voltage electrical current supply of one polarity; and connecting means for electrically connecting said outer screens with a high voltage electrical current supply and having a polarity opposite that of said one polarity; said air filter cartridge support frame including a frame for supporting said outer screens, said dielectric filter pads, said inner screen and said electrode and connecting means.
2.
A charged media air filtration system as in claim 1 wherein said disposable air filter cartridge includes said outer screens, said first and second filter pads and said inner screen bound together in a disposable unit.
3.
A charged media air filtration system as in claim 2 wherein said outer screens extend into said marginal border and said border is formed into a frame by compressing and bonding together overlapping regions of said outer screens and of said pads extending beyond the perimeter of said inner screen.
4.
A charged media air filtration system as in claim 3 wherein a protective edging is applied to said border