Copying Machine Supply – What is a photocopying machine?
Photocopying is a phenomenon which creates copies of paper documents or other graphic images in a very quick time and at a low cost. The first of its kind was introduced by Xerox in 1960s.
Let’s look at the working of a photocopier step by step:
1.First and foremost, the surface of a drum is supplied with an electro-static charge produced by a high-voltage wire called a corona wire. A semiconductor material named selenium or germanium is used to coat the drum.
2.Secondly, a light (thin strips format) is beamed onto the image, which is only reflected by the white areas of the paper. The light is then directed towards the drum, which is specially designed to make it photoconductive. This is done to neutralize the positive charges from the light.
3.As a result, the charges have become opposite i.e. the white areas of the picture have become neutral and the black areas have become positive.
4.The toner is negatively charged. Hence, when it is in contact with the drum, it gets attached with the areas that are positively charged, just like paper sticks to a charged balloon.
5.The toner is then attracted onto a positively charged piece of paper.
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Jatin Chawla is a freelance journalist. Jatin writes for http://headings.internettollfree.com, offering valuable information on Copying Machine Supply.