Photocopy Machine Printers & Scanners

Physics > Photocopiers and printers Laws, physics and principles of electrostatics in copiers and printers. Consider the three stages of xerography, the principle of operation of copiers. Copiers use xerography based on the principles of electrostatics. A copier is a device that makes copies of documents and images on paper. Most modern machines use xerography based on dry and heat treatment. Models differ in working methods, but xerography uses a photo sensor with a copier. The process is carried out in 5 stages, where electrostatics plays an important role. The picture below shows all the steps. How does a copier work? Operation of the copier The first step is the charge of the cylindrical drum. This is a corona discharge whose output is limited by the control grid or screen: the negative charge ionizes the space between wire and conductor, causing electrons to repel or push against the conductor. That, in turn, moves over the conductive surface and is held at ground potent Photocopy Machine Printers & Scanners ial. Charge polarity is based on the desired effects. Positive is used for black and white copies, and negative is used for black on white in negative originals. The original document is illuminated by a lamp. The white areas reflect light on the tympanic surface, which exhibits photoconductivity. After that, the regions are discharged to the ground, and those that are not conductive remain with a negative charge. To create images on paper, toner is used - a powder with a positive charge. When the drum is coated, it is attracted to the dark (negative) areas and forms an image. The image with the toner on the drum is transferred onto paper with a more negative charge. The toner is melted and adhered to the paper using thermal and pressure rollers. It is important to note that all these processes are typical for modern technology. But older models use positive drum and paper, and the toner carries a negative charge. Shielding and charging by induction © 2014 - 2021. Online media V-kosmose.com. All rights reserved. Age category of the site: 12 . https://jiji.co.tz/printers-and-scanners/photocopy-machine

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