Copying Machine Supply – What is a photocopying machine?
by: searchinfluence
Total views: 215
Word Count: 402
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. By 1980s, Photocopying machines
gradually replaced copies made by carbon paper, mimeograph machines and other
substitute products that were used at that time. If will not be wrong to say
that due to this usage preference the development of paperless offices was
prevented in the initial years of digital revolution.
Today, Photocopying machines are used on a large scale in almost every
business, institutes and government offices. Although, there has been talk
about the extinction of photocopiers as more and more people are embracing to
digital technology for creation of important documents. Even distribution of
such documents is preferred through digital technology than sending the actual
piece of paper. But still a photocopier is more convenient than a computer for
creating a normal copy of a written document.
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.
6. The toner is nothing but
a dry ink substance. If paper came out of the photocopier covered in dry toner
it would just brush off, so the toner is heated to make it melt and to bind it
to the paper.
About the Author
Jatin Chawla is a freelance journalist. Jatin writes for <a href="http://headings.internettollfree.com/">http://headings.internettollfree.com</a>, offering valuable information on <a href="http://headings.internettollfree.com/copying-machine-supply.html">Copying Machine Supply</a>.
Rating: Not yet rated
Login to vote