In an insulated object the static electrictricity builds up. Charged
atoms are collected because they are attracted to eachother.
Objects with opposite static feilds cling to eachother. The
photorecepter acts as a temperary glue which is the core
component of the system. Their are light photons that
discharge the highly photoconductive material that make up the
drum assembly.
corona wire has an electric current running through it. This wire
charges the drum to give it a total positive charge. Instead of using
a corona wire a charged roller could be used. As the drum is
revolving, discharge to certain points are made when the tiny laser
beam runs across the surface of the page. What this does is a
pattern of electrical charges that shows up as letters or pictures to
be printed. This image is called an electrostatic image. If the
system is reversed it will show a positive electrostatic image on a
negative backround.
The charged toner provides a fine, black powder. The drum is
coated with the pattern from when it was set previously. The toner
is positively charged that way the toner catches on to the negative
discharched areas of the drum. The toner doesn't cling to the
positively charged backround because of the charge.
In order for the affixed powder pattern to show up on the sheet
of paper the transfer corona wire has to give off a stronger
negative charge. Since this charge is stronger than of the
electrostatic image the paper can pull the toner powder away. The
The paper has to and always is moving at the same speed as the
drum in order to allow the image pattern to show up perfectly.
If the drum has this powder on it than why doesn't the paper
stick to the drum? Drum gets discharged by the detac corona wire
right before picking up the toner. Why does the paper always feel
hot or warm when it comes out of the printer? The final process
the paper goes through ,before it comes out, is the fuser. The
fuser is a pair of heated rollers which rolls the paper to the output
tray. The purpose of these fuser rollers is to melt the loose toner
powder to the paper.
