Imagine writing with a beam of light. It may sound invalid, but this is what laser printers do when it comes to making a permanent copy of information or data from your computer system on a paper. This article by 123ink.ca will enlighten you about how these printers work. When printing something, your computer system sends a huge stream of electronic data to your laser printer. An electronic circuit in the printer determines what the data entails and how it needs to look like on a page. This is where the laser beam scan back and forth across a drum which is equipped inside a printer that creates a pattern of static electricity. This is then further forwarded onto a page a type of powdered ink referred to as toner. Then as in a photocopier, a fuser unit helps in bonding the toner to the paper.
- Vast number of bytes or characters of data stream from your computer to the printer.
- An electronic circuit determines how to print the data so it looks accurately on the page.
- Then this electronic circuit evokes the corona wire. This wire provides static electric charge to anything nearby.
- The wire charges the photoreceptor drum so give it a positive charge spread evenly across the surface.
- Simultaneously, the circuit evokes the laser to draw the image of the page on the drum. The laser beam bounces off a moving mirror that scans over the drum, note that it never moves, only bounces off. When the laser hits the drum, it eliminates the positive charge and creates a negative charge. Then the image builds up on the drum, the areas with positive charge will leave a white area on the page, and on the other hand, negative charges leave black area.
- An ink roller that touches the drum coats it with toner. The toner is positively charged so it sticks to the parts of drum that has a negative charge. No ink is attached to the drum that is positively charged. An inked image of the page is created on the drum.
- A sheet of paper is then fed to the printer towards the drum. When it rolls along, it bears a strong positive charge by another corona wire. When the paper is nearby the drum, the positive charge attracts native charged toner particles away from the drum. Then the image is transferred from the drum to the paper then the toner particles are set lightly on the paper surface. Two rollers are passed on the ink paper where its heat and pressure fuse the particles permanently onto the paper fibers. Hence, the printout is emerged.