Photocopiers
Created | Updated Mar 12, 2002
Photocopiers are mechanisms that make duplicates of an original piece of
paper, especially those that have information written on them. The original
is placed on a glass surface on top of the photocopier, which then scans it using
a halogen lamp. The image is then reflected off a scan mirror, through a lens system,
reflected off another mirror, and is displayed on a photosensitive drum. A charging electrode then
converts the light into an electrical image on the drum. The dark spots on the image have negative
charges on the drum, thus attracting positively charged toner. The charging electrode then negatively
charges a sheet of incoming paper, which comes in through a paper feed, and the image and toner are
transferred onto the sheet. The paper then is fed through several hot rollers that fuse the toner
and image into the sheet, which then comes out of the mechanism and onto a tray, all hot (Umm...maybe
not really hot, more like warmish) and shiny.
paper, especially those that have information written on them. The original
is placed on a glass surface on top of the photocopier, which then scans it using
a halogen lamp. The image is then reflected off a scan mirror, through a lens system,
reflected off another mirror, and is displayed on a photosensitive drum. A charging electrode then
converts the light into an electrical image on the drum. The dark spots on the image have negative
charges on the drum, thus attracting positively charged toner. The charging electrode then negatively
charges a sheet of incoming paper, which comes in through a paper feed, and the image and toner are
transferred onto the sheet. The paper then is fed through several hot rollers that fuse the toner
and image into the sheet, which then comes out of the mechanism and onto a tray, all hot (Umm...maybe
not really hot, more like warmish) and shiny.
