by: John Sollars
Most people have used printers at some stage for printing documents but few are aware of how it works. Printed documents are arguably the best way to save data. There are two types of basic printers Impact and Non-impact.
Impact printers, as the very name implies means that the printing mechanism touches the paper for creating an image. Impact printers were used in early 70s and 80s. In Dot Matrix printers a series of small pins is used to strike on a ribbon coated with ink to transfer the image on the paper.
Other Impact Printers like Character printers are basically computerized typewriters. They have a series of bars or a ball with actual characters on them, which strike on the ink ribbon to transfer the characters on the paper. At a time only one character can be printed. Daisy Wheel printers use a plastic or metal wheel. These types of printers have limited usage though because they are limited to printing only characters or one type of font and not the graphics.
There are Line printers where a chain of characters or pins, print an entire line, which makes them pretty fast, but the print quality is not so good. Thermal printers are nothing but printers used in calculators and fax machines. They are inexpensive to use. Thermal printers work by pushing heated pins against special heat sensitive paper.
More efficient and advanced printers have come out now which use new Non-impact Technology.
Non-impact printers are those where the printing mechanism does not come into the contact of paper at all. This makes them quieter in operation in comparison to the impact printers.
In mid 1980s Inkjet printers were introduced. These have been the most widely used and popular printers so far. Colour printing got revolutionized after inkjet printers were invented. An Inkjet printer?s head has tiny nozzles, which place extremely tiny droplets of ink on the paper to create an image. These dots are so small that even the diameter of human hair is bigger. These dots are placed precisely and can be up to the resolution of 1440 x 720 per inch. Different combinations of ink cartridges can be used for these printers.
How an Inkjet printer works
The print head in this printer scans the page horizontally back and forth and another motor assembly rolls the paper vertically in strips and thus a strip is printed at a time. Only half a second is taken to print a strip. Inkjet printers were very popular because of their ability to colour print. Most inkjets use Thermal Technology. Plain copier paper can be used in these printers unlike thermal paper used for fax machines. Heat is used to fire ink onto the paper through the print head. Some print heads can have up to 300 nozzles. Heat resistant and water based ink is used for these printers.
The latest and fastest printers are Laser Printers. They use the principal of static electricity for printing it as in photocopiers. The principle of static electricity is that it can be built on an insulated object. Oppositely charged atoms of objects (positive and negative) are attracted to each other and cling together. For example, pieces of nylon material clinging to your body, or the static you get after brushing hair. A laser printer uses this same principle to glue ink on the paper.
How Laser Printer works:
Unlike the printers before, Laser printers use toner, static electricity and heat to create an image on the paper. Toner is dry ink. It contains colour and plastic particles. The toner passes through the fuser in the computer and the resulting heat binds it to any type of paper. Printing with laser printers is fast and non-smudge and the quality is excellent because of the high resolution that it can achieve with 300 dots per inch to almost 1200 dpi at the higher end.
Basic components of a laser printer are fuser, photoreceptor drum assembly, developer roller, laser scanning unit, toner hopper, corona wire and a discharge lamp. The laser beam creates an image on the drum and wherever it hits, it changes the electrical charge like positive or negative. The drum then is rolled on the toner. Toner is picked up by charged portion of the drum and gets transferred to the paper after passing through the fuser. Fuser heats up the paper to amalgamate ink and plastic in toner to create an image. Laser printers are called ?page printers? because entire page is transferred to the drum before printing. Any type of paper can be used in these printers. Laser printers popularized DTP or Desk Top Publishing for it can print any number of fonts and any graphics..
This is how the computer and printer operate to print
When we want to print something we simply press the command ?Print?. This information is sent to either RAM of the printer or the RAM of the computer depending upon the type of printer we have. The process of printing then starts. While the printing is going on, our computer can still perform a variety of operations. Jobs are put in a buffer or a special area in RAM or Random Access Memory and the printer pulls them off at its own pace. We can also line up our printing jobs this way. This way of simultaneously performing functions is called spooling. Our computer and the printer are thus in constant communication.
About The Author
John Sollars is the managing director of Solar Electronics, which are both ink and pc peripheral suppliers based in Shropshire, UK. To access a comprehensive online shop of original and re-manufactured printer ink cartridges please visit http://www.stinkyinkshop.co.uk.
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The Basics of Magazine Printing
The Basics of Magazine Printing
by: Viojieley Gurrobat
Reading magazines or newspaper has been a part of our life ever since these printed materials came into circulation. Every image, text or message written and printed in these materials have continuously informed and amazed us. But have you ever bothered to take a moment in your busy life and wonder, even for just a minute or two, how these stunning pieces of art came into existence? Is it easy to produce these magazines and newspapers? Do they use special machines? How much does it cost to print one copy of a magazine?
Well, those questions will be best left for professionals to answer. However, there are certain factors you can take note of when considering printing a magazine for your business or for any event for that matter. Just like any other print job, magazine printing needs careful and proper planning to ensure that the finished product will look exactly the way you want it to be....
The Basics of Magazine Printing
Photo printers > The Basics of Magazine Printing
Is A Laser Printer Right For Me?
Is A Laser Printer Right For Me?
by: Bill Smith
The average home computer user definitely does not need a laser printer. Sure laser printer prices have fallen considerably in the last couple of years. But have you look at the cost of laser toner? The average laser toner cartridge sells for over $100. The cost of replacement ink can really ad up on you. Cost of ink should not be the only factor that deters you from buying this kind of printer though.
Unless you are printing hundreds of pages each day you really don?t need a laser printer. Today?s inkjet printers have incredible print resolution, are very affordable, and replacement ink cartridges do not cost a lot. If it?s print quality that you?re concerned about, consider that you can?t even tell the difference between a laser printout and an inkjet printout.
Another thing to consider is the size of the printer. Generally laser printers dwarf the smaller inkjet printer. So if you?re looking...
Is A Laser Printer Right For Me?
Photo printers > Is A Laser Printer Right For Me?
Digital Camera Vs. Film - Pros And Cons
Digital Camera Vs. Film - Pros And Cons
by: Brandon Layne
Consumers have been pretty receptive to the lower priced ?point and shoot? models (some 5 million digital cameras were sold in the U.S. during the Christmas 2005 holiday season), but there are still some holdouts.
Great strides have been made in digital technology over the past few years, but more sophisticated digital cameras have only recently come down in price enough to attract the ?serious amateur? market. In the past, the price of high-end digital camera equipment was more suited to the professional who could turn that investment into an income source.
Even traditional film buffs are slowly coming around to the benefits of digital photography. Among the holdouts, the chief problem seems to be confusion. There are so many choices, with a broad range of options, and just as many price ranges.
It?s cheaper not to make a decision, than to make a mistake.
They get...
Digital Camera Vs. Film - Pros And Cons
Photo printers > Digital Camera Vs. Film - Pros And Cons
Digital Camera Vs. Film - Pros And Cons
Digital Camera Vs. Film - Pros And Cons
by: Brandon Layne
Consumers have been pretty receptive to the lower priced ?point and shoot? models (some 5 million digital cameras were sold in the U.S. during the Christmas 2005 holiday season), but there are still some holdouts.
Great strides have been made in digital technology over the past few years, but more sophisticated digital cameras have only recently come down in price enough to attract the ?serious amateur? market. In the past, the price of high-end digital camera equipment was more suited to the professional who could turn that investment into an income source.
Even traditional film buffs are slowly coming around to the benefits of digital photography. Among the holdouts, the chief problem seems to be confusion. There are so many choices, with a broad range of options, and just as many price ranges.
It?s cheaper not to make a decision, than to make a mistake.
They get...
Digital Camera Vs. Film - Pros And Cons
Photo printers > Digital Camera Vs. Film - Pros And Cons
Drop On Demand Printers
Drop On Demand Printers
by: Bill Smith
Most HP and Epson printers are drop on demand printers. They use electrical pulses to fulfill requests for ink. The ink is expelled out of the print head by a bubble which forms as a reaction to being heated. Once the ink is propelled out of the cartridge, the bubble cools, contracts, and forms a vacuum of sorts, which pulls more ink into the nozzle.
HP DeskJets and BubbleJets are popular examples of printers that use this technology.
Epson printers work on the same principal with the exception of a minor twist ? they use a transducer to produce the droplets in what is referred to as piezoelectric DOD.
So what about the ink ? does it matter what kind you buy as a replacement?
The answer is yes, it does matter.
The ingredients that go into ink play a huge role in the quality of your printouts. All ink manufactures work to strike the delicate balance between print quality, time it...
Drop On Demand Printers
Photo printers > Drop On Demand Printers