How Does Laser Printer Work? Key Parts & Working

No matter which industry or trade you belong to, each one of us is familiar with printers. Almost every workspace in all departments needs a printer for a number of tasks.

From a small scale business to a large scale and homes, printers have become an essential part of our life.

Depending on the performance, quality, and result, many of us preferred to have a laser printer instead of other types of printers.

This is because laser printer is much faster, provide high definition quality result, user and environmentally friendly, and despite all of these factors, it is cheaper and cost-effective as compared with other types of printers.

It is very rare that you are dealing with printers and you don’t get any error or problem when working with them.

There are a number of factors that can cause a mistake, disrupting your work and performance. so, Best Printer For Notary Signing Agents.

On the other hand, if you know how a laser printer works, it will be easier for you to identify the root cause of the problem, and you will be able to troubleshoot it yourself.

Even if you don’t get an error message, it is important that you know the working functionality of a laser printer as it will allow you to work more efficiently, and with limited resources, you will be able to get the most out of it.

Since you are here now, continue reading this article till the end, and by the end of it, you will have a sound knowledge of how does a laser printer works, and thus you will be able to utilize it properly.

How Does Laser Printer Work?

Key Parts of the Printer

It is very important that you know the working components of a printer in order to fully understand the working of a printer.

Therefore, before discussing how it works, let’s see the key elements and components of a laser printer.

Power Supply

When working with any electronic device, the power source is essential in order to make the machine works. In the case of a laser printer, you should ensure an uninterrupted power supply when working with it.

Toner Cartridge

One of the most essential parts of a laser printer is a toner cartridge. It is a component that contains the ink in powder form, which is then transferred to the paper using an electrical charge drum unit.

It gives more accurate and fast results as compared to ink cartridges. Using a toner cartridge, you can get a large number of prints in one go.


Typically, corona wires are used in laser printing; the job of corona wire is to positively charge the drum unit so that it can attract the toner on the surface. It works hand in hand with a photosensitive drum.

Photosensitive Drum

When corona wire is charged, the drum then draws the toner particles towards the surface. In simple words, we can say that it is the component that transfers the printing text or image on paper.


From a series of mirrors, a light beam is passed to imprint the shape on a drum.

Transfer Belt Or Rollers

To move the paper along the drum, a transfer belt is used. Some old version printers use rollers instead of the belt; however, both work the same way.

Fuser Unit

A laser printer uses dry ink to form the image or text. It is achieved by melting the toner particles at high pressure and temperature levels.

Rollers are basically used to provide the required level of heat. It does not come in contact with the printing paper so that the heat does not create a fire.

Waste Toner Bottle

To achieve high accuracy and result, a waste toner bottle is used, the main task of which is to collect excess toner from the drum during the printing operation. Once the bottle is full, it needs to be unfilled or replaced. so, Best Printer For Linux is a good to read for Ubonto Lovers.

Working Of a Laser Printer

Now, as you are aware of the main components of a laser printer, it will be easy for you to understand the working steps. Let’s undergo the process from the very start.

  • The first thing you do is that you give the print command from a computer. The printer must be connected to a computer, either wired or wireless. As soon as you sent the printing command, the information is stored in the memory of the printer.
  • Here comes the role of the corona wire; it will start heating up until it is ready to pass the electric charge to the drum.
  • The drum will then start receiving the positive charge and will be ready to receive the laser beam. Your printer may have one or more than one drum for a different color.
  • The fourth step is referred to as exposing. In this step, a laser is generated and is targeted on the photosensitive drum. As the drum rotates, each part of it is made exposed to the beam. It will result in imprinting a shape that you want to print and changing the charge to negative.
  • The cartridge then releases the positively charged toner particles, which sets on the opposing charged surface. The process is called developing and transferring. Now the paper is rolled out using the transfer belt, catching the toner particles on the page.
  • Here comes the job of the fuser unit. The paper containing the toner particles is now passed through the fuser unit; the heat generated by the fuser unit melts the toner particles and converts them into a print. This step is the last step of the process and is called as fusing. As soon as it is done, you will receive a printed page, and you are good to go; you have successfully gone through the printing process of a laser printer.
By going through the points mentioned above, you can see that the working of a laser printer is quite simple and straightforward. There is a significantly less chance that you will get an imperfect result.

Laser printing is an advanced method being used all over the world, and knowing how it works, you will be able to maximize the use of it and will utilize it in the best possible way.