Re: Uninterruptible Power Supplies
The toner is made of microscopic plastic spheres with colored pigment embedded on their surfaces. It is attracted by electrostatic charge to the Selenium covered drum. When the drum is rolled over a sheet of paper the toner is transfered to the paper. It is still a powder and can be easily smeared or wiped off the sheet. The coated paper sheet then passes over a heated roll bar, or between two of them. They are called "Fusers". The heat from the Fuser is hot enough to melt the plastic causing it and the Carbon to fuse to the paper. The Fuser is not kept hot. It is heated up only when the laser is requested to print something. Because the user does not want to wait 5 minutes while the Fuser is heated, the quartz tube lamp inside the Fuser is rated at 700 Watts or more. This is enough power to heat the surface of the Fuser to 300F. Teflon on the surface of the Fuser keeps the toner from sticking to it.
Essentially, color printers work the same way as monochrome printers, except they go through the entire printing process four times -- one pass each for cyan (blue), magenta (red), yellow and black. By combining these four colors of toner in varying proportions, you can generate the full spectrum of color.
There are severl different patented methods used to heat fusers but the quartz lamp is the most common.
Originally posted by Death Kitten
Essentially, color printers work the same way as monochrome printers, except they go through the entire printing process four times -- one pass each for cyan (blue), magenta (red), yellow and black. By combining these four colors of toner in varying proportions, you can generate the full spectrum of color.
There are severl different patented methods used to heat fusers but the quartz lamp is the most common.
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