This invention is related to filtering devices for removing paper dust and computer chemicals such as developer, toner, carbon black and residues dispersed into the air in a data processing room by the operation of various paper handling machines, such as computer printers, and more particularly to a combination filter apparatus for removing computer room contaminants from the air passing into filter room from the paper handling machine, and for collecting floor contaminants such as carbon black.
USPTO Backgrounds
USPTO Backgrounds