General Information 1-53
4025-XXX
Xerographics Overview
Xerography is the process of using an electrically charged surface and a dry, powered ink
to create an image on a sheet of plain paper. Xerography, in some form, is used in most of
today’s copiers and laser printers. The printer uses a number of components and AC and
DC voltages in its xerographic process.
The surface of the Drum is made of a photoconductive material that retains an electrical
charge as long as the material is not exposed to light. Exposure to light discharges the
electrical charge. At the start of each print cycle the BCR (Bias Charge Roll) places a
uniform electrical charge on the surface of the Drum. The modulated Laser Beam shines
light onto the surface of the drum, discharging select areas, thus creating an invisible
latent image. The latent image is made up of a pattern of negative and positive charges.
The Magnet Roll applies dry toner to the latent image to create a visible developed
image. A sheet of paper passes between the Drum and the BTR (Bias Transfer Roll)
where the developed image on the drum is transferred to the paper. The DTS (Detack
Saw) applies a voltage to the back of the paper to remove it from the Drum. The sheet of
paper, now with a toner image on the surface, moves out of the Xerographic area and on
to the Fuser. The Cleaning Blade scrapes any residual toner left on the Drum after
transfer and deposits it in a sealed reservoir that is located inside the EP Cartridge.
To Next Page
Loading...
