Which component of the laser printer applies the positive charge to the paper?
|
Initially, the drum is given a total positive charge by the charge corona wire, a wire with an electrical current running through it. (Some printers use a charged roller instead of a corona wire, but the principle is the same.) As the drum revolves, the printer shines a tiny laser beam across the surface to discharge certain points. In this way, the laser "draws" the letters and images to be printed as a pattern of electrical charges -- an electrostatic image. The system can also work with the charges reversed -- that is, a positive electrostatic image on a negative background. After the pattern is set, the printer coats the drum with positively charged toner -- a fine, black powder. Since it has a positive charge, the toner clings to the negative discharged areas of the drum, but not to the positively charged "background." This is something like writing on a soda can with glue and then rolling it over some flour: The flour only sticks to the glue-coated part of the can, so you end up with a message written in powder. With the powder pattern affixed, the drum rolls over a sheet of paper, which is moving along a belt below. Before the paper rolls under the drum, it is given a negative charge by the transfer corona wire (charged roller). This charge is stronger than the negative charge of the electrostatic image, so the paper can pull the toner powder away. Since it is moving at the same speed as the drum, the paper picks up the image pattern exactly. To keep the paper from clinging to the drum, it is discharged by the detac corona wire immediately after picking up the toner. What part of a laser printer puts a positive charge on the paper?The Drum: The drum is positively charged by a wire with an electrical charge running through it known as the charge corona wire. As the drum revolves, the printer shines a laser beam across certain portions of the surface area essentially de-charging these portions of the drum.
Which component in a laser printer charges the paper?Which component in a laser printer charges the paper to attract toner? The transfer roller charges the paper to attract the toner. The primary corona prepares the photosensitive drum fro writing by causing it to receive a negative electrostatic charge.
What laser printer component applies a charge to the back of paper so that toner is pulled from the drum onto the paper?A transfer roller (or a transfer corona) applies a charge to the paper as it passes. The charged paper attracts the toner and the toner is transferred from the imaging drum to the paper.
What is charge of laser printer?Laser is activated to draw the image on the drum. Where the laser beam hits the drum, it erases positive charge & creates negative charge. 3. Drum is coated with powdered ink (toner) that has positive charge.
|
