PERFORATED POLYMERIC MATERIAL FOR FILTER UNIT
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
The effluent gases of reprographic devices contain ozone which is chemically changed or filtered by passing it through a filter containing a granular chemical. Since ozone will attack most materials, a stainless steel mesh has typically been used to contain the granular chemical. The present device is made using a container made from an ozone resistant polymeric plastic having ozone access holes in it, which may be formed by mechanical punching, for example, or by laser beam. While the container may be of any suitable shape such as cylindrical or rectangular as in Figures 1 and 2, Figure 3 illustrates a preferred embodiment in the form of a truncated pyramid. Each of the sides may be separately formed and perforated with holes ranging from .020 inches to .060 inches in diameter and assembled into the final configuration by adhesives or fasteners. The holes in each of the sides are sufficiently small relative to the granular chemical so as to not permit the chemical granules to go through them.