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.

Traffic Barrels

Printers have become a dominant feature in most offices, restaurants, hospitals, hotels and homes. The use of a printer is unavoidable because it prints high quality images and text in a cost effective manner. These printers are designed mainly for official use, as there is a requirement of numerous prints with high quality.

Printers require two main elements to function; one is electricity and the other is ink or toner. The ink is a limited resource and needs to be refilled or replaced from time to time. Purchasing a new printer ink cartridge may be expensive. However, refilling is cheaper yet equally efficient. The black ink printer cartridges are designed for remarkable professional quality black text and graphic reproduction.

An ink cartridge is a removable component of all types of printers. The cartridge functions as a store for black ink and act as a medium to apply the ink in a designated manner on the paper. The cartridge is docked into the printer and place closely above the printing surface of the paper. A printer may make use of a single ink cartridge and rarely two cartridges. The cartridge contains ink reservoirs, electronic components, and an electric chip that connects the cartridge to the printer.

A printer is usually provided with a cartridge and specification on the number of prints it is capable of producing per cartridge. It is advisable to use the same brand of black ink cartridge for the corresponding printer, as they are known to function flawlessly. Companies selling printing accessories offer high quality and long lasting black ink cartridges that need fewer refills and hence prove to be more productive.

Printer ink cartridges normally use two types of ink; one is pigment-based black ink and the other is dye-based ink. This ensures crispy, quick, and anti-fading outputs. It is advisable to purchase black ink cartridges from reliable sources, as there are many replicas available which makes it difficult to differentiate between the original and a replica.

Brass Collectables

Your home office printer is going to be an important part of your home business. While making the right choice of printer seems like a daunting task, your major decision is going to be between an ink jet and a laser printer. Along with a different way of delivering ink to the page, these two types of printers have their own benefits and drawbacks.

The key difference between the two printers is the type of ink that they use. Ink jet printers use liquid ink and laser printers use powdered ink. Laser printers come in two varieties, monochrome (black and white) and color. Each type of printer serves different purposes.

Most businesses use monochrome laser printers because they print a lot of black and white documents. If you’re using your printer for the same reason, you may want to consider a monochrome laser printer. They have a better page output than ink jets and come at a midrange price. They are normally priced higher than ink jets, but their ink refills cost a lot less. Monochrome laser printers are perfect if you need to print lots of pages of text. The only drawback to this type of printer is that you can’t print color.

If you need any color printing done, an ink jet printer will be your least inexpensive option, at least in terms of initial cost outlay. Ink jets offer a lot power for their speed, but they are definitely slower than laser printers. The main advantage is their price and their portability. Compared to laser jet models, ink jets are very lightweight and are generally smaller. This makes them a good option if you don’t have a whole lot of space for your printer.

The major drawback to ink jet printers is the cost of their ink. Compared to laser printers, refills for ink jets cost substantially more. Even though you’re saving more at the onset, you’ll be paying a lot in the long run. The price of ink over the life of your printer can be a deterrent to getting an ink jet. But if your budget for your printer at the outset is small, then an ink jet might be your only option. They are generally cheaper than laser printers.

When it comes to quality of printing, speed of printing and overall quality, color laser printers are the best choice. All of this comes at a higher price than you’ll pay for an ink jet printer or monochrome laser printer, but it may be worth it if you need to print high quality documents. A color laser printer has ink that is relatively inexpensive compared to ink jet ink. In addition, a color laser printer will allow you to print high quality photos along with black and white documents. This can save you money on having your pictures printed, and allow you to print as many copies as you need.

Depending on the kind of business you’re in, the quality that you get from a color laser printer may well be worth the initial cost. If you have the money to spend, a color laser printer is your best bet. But if you’d rather keep those initial costs low and print color, then an ink jet printer might be the better way to go.

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