Pleated charged media air filter

Claim 2

In an air filtration system of the charged media type, the combination of: electrically conductive charging media having passageways therethrough to allow for the substantially free passage of air, said charging media being in one or more pairs with the media of each pair located in opposed parallel spaced-apart relationship; a filter medium comprising a planar fibrous filter pad disposed between the charging media of each said pair; electrically insulating spacers separating each said filter pad from at least one of said charging media adjacent said filter pad; means for connecting the charging media of each said pair to respective poles of a high voltage power supply; and frame means for supporting said charging media, said filter medium and said insulating spacers in their aforesaid relationship with one another within said air filtration system.

Claim 3

In an air filtration system of the charged media type, the combination of: electrically conductive charging media having passageways therethrough to allow for the substantially free passage of air, said charging media being in one or more pairs with the media of each pair located in opposed parallel spaced-apart relationship; a filter medium comprising a fibrous filter pad disposed between the charging media of each said pair, said filter pad having corrugations and contacting said charging media only at the crest regions of said corrugations; means for connecting the charging media of each said pair to the respective poles of a high voltage power supply; and frame means for supporting said charging media and said filter medium in their aforesaid relationship with one another within said air filtration system.

Claim 4

In an air filtration system of the charged media type, the combination of: electrically conductive charging media having passageways therethrough to allow for the substantially free passage of air, said charging media being in one or more pairs with the media of each pair located in opposed parallel spaced-apart relationship; a filter medium comprising a fibrous filter pad disposed between the charging media of each said pair, said filter pad having corrugations and contacting said charging media only at the crest regions of said corrugations; means for connecting the charging media of each said pair to the respective poles of a high voltage power supply; and frame means for supporting said charging media and said filter medium in their aforesaid relationship with one another within said air filtration system.

Claim 5

The combination defined in claim 1, wherein said combination is in the form of a disposable filter cartridge wherein one charging medium of each pair of charging media is bonded frictionally or adhesively to the filter pad disposed between said media.

Claim 6

The combination defined in claim 2, wherein said combination is in the form of a disposable filter cartridge wherein at least one charging medium of each pair of charging media is bonded frictionally or adhesively to the crests of the corrugated filter pad disposed between said media.

Claim 7

A disposable filter cartridge as defined in claim 4, wherein one or each charging medium bonded to the corrugated filter pad is complementarily corrugated with said filter pad, whereby said bond between said charging medium and said filter pad is substantially continuous.

Claim 8

A disposable filter cartridge as defined in claim 4, wherein the charging medium bonded to the corrugated filter pad is provided with latitudinal spikes which interleave the corrugations of said filter pad, said charging medium contacting only the crest regions of the corrugations of said filter pad, said interleaving spikes of the charging medium being spaced from said corrugations.

Claim 9

In an air filtration system of the charged media type, the combination of: electrically conductive charging media having passageways therethrough to allow for the substantially free passage of air, said charging media being in one or more pairs with the media of each pair complementarily corrugated and located in opposed spaced-apart relationship; a filter medium comprising a fibrous filter pad complementarily corrugated with said charging media and disposed between the media of each said pair of charging media; electrically insulating spacers separating said filter pad from at least one of said charging media adjacent said filter pad; means for connecting the charging media of each said pair to respective poles of a high voltage power supply; and frame means for supporting said charging media, said filter media and said insulating spacers in their aforesaid relationship with one another within said air filtration system.

Claim 10

In an air filtration system of the charged media type, the combination of: electrically conductive charging media having passageways therethrough to allow for the substantially free passage of air, said charging media being in one or more pairs with the media of each pair complementarily corrugated and located in opposed spaced-apart relationship; a filter medium comprising a fibrous filter pad complementarily corrugated with said charging media and disposed between the media of each said pair of charging media; electrically insulating spacers separating said filter pad from at least one of said charging media adjacent said filter pad; means for connecting the charging media of each said pair to respective poles of a high voltage power supply; and frame means for supporting said charging media, said filter media and said insulating spacers in their aforesaid relationship with one another within said air filtration system.

Claim 11

The combination of claim 7, in the form of a disposable filter cartridge wherein one charging media of each pair is bonded frictionally or adhesively to said filter pad disposed between said media.

Claim 12

A disposable filter cartridge as in claims 3, 4 or 5, further comprising a supporting, disposable frame.

Claim 13

A disposable filter cartridge as in claims 6 or 8, further comprising a supporting, disposable frame.

Claim 14

An air filter cartridge frame comprising: a shallow rectangular tray, having a bottom part which is electrically conductive and having passageways therethrough to allow for the substantially free passage of air, said bottom part of said tray provided on its inside surface with electrically insulative spacers located in a spaced-apart relationship, and said bottom part of said tray being electrically insulated from the sides of said tray; and means for connecting the bottom of said tray to one pole of a high voltage power source.

Claim 15

An air filter cartridge frame comprising: a shallow rectangular tray, having a bottom part which is electrically conductive and having passageways therethrough to allow for the substantially free passage of air, said bottom part of said tray provided on its inside surface with electrically insulative spacers located in a spaced-apart relationship, and said bottom part of said tray being electrically insulated from the sides of said tray; and means for connecting the bottom of said tray to one pole of a high voltage power source.

Claim 16

An air filter cartridge frame as in claim 11, comprising: a shallow rectangular metal tray, having a bottom part comprising a metallic screen or expanded mesh insulated from the sides of said tray, said tray being further provided with a projecting lip along one side; a high voltage power supply device affixed to said projecting lip of said tray and housed within a protective shield; an electrical power supply jack for connecting said high voltage power supply device to an electrical power source, a positive pole of said jack being connected to a positive input pole of said high voltage power supply device and a neutral pole of said jack being connected to a neutral input pole of said high voltage power supply device and to a side of said tray; electrical connection means provided between a high voltage output pole of said high voltage power supply device and the bottom part of said tray, said connection means being insulated from the sides of said tray.

Claim 17

An air filter cartridge frame as in claim 12, further comprising an electrical switch means comprising a resilient conductor means and a conductor mounting means, said conductor mounting means frictionally engaging a hole in a side of said tray, said conductor means being substantially L-shaped and insulated from said mounting means, said conductor means being connected on its one end to said neutral input pole of said high voltage power supply, its free end being normally parallel to and closely spaced from a side of said tray so that on insertion of a suitably sized filter cartridge into said tray, said free end of said conductor is forced into contact with said side of said tray and on removal of said filter cartridge, said conductor returns to its normally parallel, spaced relationship with said side of said tray.

Claim 18

A desk top electronic air filter unit of the charged media type comprising: a housing divided into at least two parts, said parts being disengageable to provide access to the interior of said housing, said housing being provided with air intake and exhaust passageways to permit the passage of air therethrough; fan means disposed within said housing to force the movement of air therethrough; motor means drivably connected to said fan means; electronic air filter means disposed between the air intake and exhaust passages in said housing so that substantially all air which passes through said housing passes through said air filter means, said air filter means comprising first and second electrically conductive charging media with a filter pad therebetween, said first charging medium being spaced from said filter pad by electrically insulating support means; and a high voltage power supply, the high voltage output pole of which is connected to said first charging medium and neutral pole of which is connected to said second charging medium of said cartridge filter.

Claim 19

A desk top electronic air filter unit of the charged media type comprising: a housing divided into at least two parts, said parts being disengageable to provide access to the interior of said housing, said housing being provided with air intake and exhaust passageways to permit the passage of air therethrough; fan means disposed within said housing to force the movement of air therethrough; motor means drivably connected to said fan means; electronic air filter means disposed between the air intake and exhaust passages in said housing so that substantially all air which passes through said housing passes through said air filter means, said air filter means comprising first and second electrically conductive charging media with a filter pad therebetween, said first charging medium being spaced from said filter pad by electrically insulating support means; and a high voltage power supply, the high voltage output pole of which is connected to said first charging medium and neutral pole of which is connected to said second charging medium of said cartridge filter.

Claim 20

A desk top air filter unit as in claim 15, wherein the filter pad and the second charging medium are adhesively or frictionally bonded together to form a disposable filter cartridge.