ALLOY EXTRUDER SCREW
Original Publication Date: 1990-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
Electrophotographic photoreceptors frequently are prepared by vacuum evaporating selenium or alloys of selenium with materials such as tellurium and/or arsenic from crucibles onto a substrate. Photoreceptors prepared from selenium or selenium alloys can achieve improved performance by processing the alloy in an extruder having a screw design as disclosed herein. The alloy is introduced into the extruder, melt mixed, and subsequently cooled to form shots which are then placed into the crucibles for vacuum evaporation. Photoreceptors prepared from selenium processed with an extruder screw of the design disclosed herein exhibit improved electrical characteristics, increased hardness, increased photoreceptor life, and lowered residual potentials.