LOW SURFACE ENERGY SHEET FEED ROLLER
Original Publication Date: 1980-Jun-30
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Generally, the document roller in an electrophotographic printing machine is made from a rubber wheel. However, it has been found that as the rubber wheel drives the document across the platen in the exposure mode of operation, the abrasive characteristics of the paper produce abrasions thereon. This is due to the high friction between the paper and the glass. In order to reduce the friction, the platen may be made from a porous substrate such as gradient index glass having a low coefficient of friction material filling the pores the'reof, such as a Teflon family material. The material lowers the surface energy of the glass. This significantly reduces the friction between the platen and the document. In this way, abrasions are minimized and the required sheet-feeding force is significantly lower.