What does the printer consist of?

A laser printer is one of the most commonly used designs in a modern office. However, not many people have thought about what it consists of, as well as how the printing process occurs and by what means. We'll talk about this later.

What's inside a laser printer

A laser printer is one of the devices that allows you to quickly print text or graphic images on plain paper. It consists of a printing mechanism and consumables.

The printing mechanism includes:

• drum unit - a means necessary to transfer an image to paper;
• laser unit - the device responsible for printing;
• corotron - a charge roller that sends a signal to the laser unit and allows you to print an image;
• transfer tape - a device responsible for intermediate image acquisition;
• developing unit - a device that is needed to transfer toner to the image into the drum.

Important! The drum unit consists of a photodrum, a doctor blade and a working hopper device. Consumables used in the printer include toner, carrier and developer. They are a kind of colored coloring powders for holding an image on paper and transferring paint to the equipment drum.

What does the cartridge consist of?

A cartridge is a replaceable ink container and is used in any printer as a means of printing.Such a device in the form of a laser printer is a device that consists of a toner with a compartment. As a rule, it contains 4-5 compartments with coloring elements. It contains a photoconductor with a primary charged shaft, a cleaning blade and a sealing type of drum blade. The compartment contains a magnetic roller with a toning dosing blade, a sealing magnetic roller blade, a toner hopper and a sealing check.

How color and black and white printing is done

The process of black and white printing in a laser printer is a delicate and complex physical and chemical process. In short, it involves implementing 5 steps:

• recharging the photo roll - receiving an equivalent electric charge and distributing it to the photo drum, which transfers the paint to the canvas;
• laser scanning or exposure - the process of passing a photo roll under a laser;
• applying toner that comes into contact with the illuminated photo roll to connect the negative charge with the positive one;
• transferring toner to paper using an appropriate roller (the negative charge of the toner collides with the positive charge on the paper and comes into contact, coming into contact with its particles and being held on it according to the law of electrostatics);
• Fixing the toner using heat with pressure - the paper moves to the fixing unit (oven) and the image is fixed on it.

A color image is obtained according to the following principle:

First, the rendering engine takes the document and processes it digitally a couple of times, creating a raster frame on it, arranged according to the colors of the toners, and then the laser distributes the charges along the rotating drum, reporting the scan and transmitting signals to the toners. Its charged particles are attracted to the drum, and it, in turn, to the paper.In this way, coloring pigments, resins and polymers are attached to the paper.

In general, the structure of a laser printer is simple: it consists of printing mechanisms and consumables, which include, among other things, a cartridge. That one includes a toner compartment. Through joint efforts, the cartridge and printer print in color or black and white on regular office paper.