Browse Prior Art Database

METHOD TO EXTEND THE LIFE OF OZONE FILTERING MATERIAL

IP.com Disclosure Number: IPCOM000024658D
Original Publication Date: 1981-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 63K

Publishing Venue

Xerox Disclosure Journal

Abstract

The present invention relates to a method to extend the life of, or to regenerate, the ozone filtering material used in an electrostatographic copying machine. It is known to remove ozone and other noxious gases from air exhausted from a copying machine by the use of such materials as activated carbon or Hopcalite, which is predominantly a mixture of manganese dioxide and copper oxide. However, the activity or the ability of such filtering material to remove ozone from air streams decreases after a sustained period of use.

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XEROX DISCLOSURE JOURNAL

METHOD TO EXTEND THE LIFE OF OZONE FILTERING MATERIAL George J. Heeks
Jean W. Laing
Ronald E. Keukelaar

Proposed Classification
U.S. C1. 204/176

Int. C1. COlb 13/10

The present invention relates to a method to extend the life of, or to regenerate, the ozone filtering material used in an electrostatographic copying machine. It is known to remove ozone and other noxious gases from air exhausted from a copying machine by the use of such materials as activated carbon or Hopcalite, which is predominantly a mixture of manganese dioxide and copper oxide. However, the activity or the ability of such filtering material to remove ozone from air streams decreases after a sustained period of use.

The present invention provides that the spent ozone filtering material be regenerated by applying heat thereto. The heat may be applied to the filtering materials in a variety of ways, depending on the form or physical shape of the filtering material. For example, when the filtering material is in the form of a mat or a felt or a foam-like structure, the heat may be applied by means of heating wires embedded in the filtering structure or on its surface. Another method for heating such filtering structure is to provide a quick and localized heating by an infrared heating element. Another method for providing the heat, which is suitable for use with any shaped filtering structure but is particularly effective with filtering media in granular form, is to positi...