SOLUTION TO ARCING FROM CORE TO PHOTORECEPTOR FOR THIN COATED ROLLS
Original Publication Date: 1998-Feb-28
Included in the Prior Art Database: 2004-Apr-08
Xerox Disclosure Journal
With certain bias charge transfer rolls, it has been observed that arcing can occur from the core of the bias charge trader roll to the photoreceptor. To block this arcing, a washer-like component (also referred to as an O-ring) made of a semi-conductive material covers the exposed metal ends of the bias transfer roll shaft. In one preferred embodiment, the O-ring can be fabricated from 47% by weight TERATHANE 650m (a polyether polyol); 8% by weight of a pair of crosslinkers, butanediol and trimethylolpropane in a ratio of 60:40; 42% by weight isocyanate; and 3% by weight CYASTAT LSm (a conductive additive), where the O-ring material has a volume resistivity of about 3 x lo9 ohms-crn. In one embodiment, the bias charge transfer roll has an overhang of flash of about 1/8 inch. Using an adhesive such as CYLOK G P or CYLOK Rm, both available from Lord Corporation, the O-ring can be adhered to the flash and the core of the bias charge transfer roll.