FILTERING DEVICES FOR USE IN COPYING MACHINES
Original Publication Date: 1981-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
This invention relates to ozone and other noxious gas reducing means in electro-statographic copying machines. Heretofore, in certain electrostatographic copying machines, particularly the modern high-speed types, the air inside the machine must be filtered to remove the fine particles suspended in the air, and then the air must be again filtered to remove ozone and other noxious gases. The present invention provides that the particulate material in the air and the ozone may be removed by filtering material contained within a single frame. The ozone removal material may be a Hopcalite impregnated foam or an activated carbon fibrous material. The particulate filter may be of any of the known foraminous filtering materials, such as paper or felt. A schematic illustration of the construction of one embodiment of such a combined filter is shown. The position of the ozone filter and the particulate filter may be reversed.