is in turn applied to the print media after the toner is transferred to the printing media the toner is fused onto the print media by a fuser assembly not shown during the printing process and more particularly the image toner transfer process some excess toner may remain on the opc drum the remaining toner may also be referred to as waste toner and must be removed from the opc drum in order to allow the opc drum to receive a uniform charge for the next printing cycle the removal of waste toner may be better understood by referring to the cross sectional view of the waste bin assembly 120 as displayed in fig2 within the waste bin assembly 120 is an opc drum 205 which is in contact with a primary charge roller pcr 210 as shown by the directional arrows the opc drum 205 spins in a counter clockwise direction while the pcr 210 rotates in a clockwise direction the pcr 210 applies a uniform static charge to the surface of the opc drum 205 clearing any residual charge from the previous printing the uniform charge may then be discharged according to the image being printed by the laser within the printer mounted below the opc drum 205 is an oem wiper blade 220 the oem wiper blade 220 extends laterally across and touches the cylindrical surface of the opc drum 205 when the oem wiper.