Operation Principle of Laser Printer A laser printer is a popular device used for printing. You can find it in every office as well as in many homes. The first laser printers were built by Xerox at the beginning of the 1970's. In the 80's serial models for individual use appeared on the market. They were expensive and ineffective. However, gradually the prices became lower as quality increased. Today laser printers are manufactured by many companies. Every day we use them for printing. Let's look at their principle of operation. The printing drum is a very important part of a printer. It is a cylinder coated with special material. The coating can change electric resistance in response to illumination. This is the so called photo-semi-conducting or photo-organic material. It is negatively charged. The charging is done by a specialised charger roller. Why is the printing drum charged? After charging the negatively charged surface of the printing drum is exposed with the help of a laser. The laser beam is moving over the printing drum while deflected by a moving mirror. The beam is focused with the help of a lens. It exposes the areas where the printing toner will be applied. The laser makes the areas electro-conductive. The charge from these particular areas is transferred to the metal surface of the printing drum. That is, the laser draws an electrostatic pre-image on the surface of the printing drum. Now it is time to apply the toner. It is also negatively charged. The ...
Operation Principle of Laser Printer
Operation Principle of Laser Printer Tube. Duration : 3.72 Mins.
Operation Principle of Laser Printer A laser printer is a popular device used for printing. You can find it in every office as well as in many homes. The first laser printers were built by Xerox at the beginning of the 1970's. In the 80's serial models for individual use appeared on the market. They were expensive and ineffective. However, gradually the prices became lower as quality increased. Today laser printers are manufactured by many companies. Every day we use them for printing. Let's look at their principle of operation. The printing drum is a very important part of a printer. It is a cylinder coated with special material. The coating can change electric resistance in response to illumination. This is the so called photo-semi-conducting or photo-organic material. It is negatively charged. The charging is done by a specialised charger roller. Why is the printing drum charged? After charging the negatively charged surface of the printing drum is exposed with the help of a laser. The laser beam is moving over the printing drum while deflected by a moving mirror. The beam is focused with the help of a lens. It exposes the areas where the printing toner will be applied. The laser makes the areas electro-conductive. The charge from these particular areas is transferred to the metal surface of the printing drum. That is, the laser draws an electrostatic pre-image on the surface of the printing drum. Now it is time to apply the toner. It is also negatively charged. The ...
Operation Principle of Laser Printer A laser printer is a popular device used for printing. You can find it in every office as well as in many homes. The first laser printers were built by Xerox at the beginning of the 1970's. In the 80's serial models for individual use appeared on the market. They were expensive and ineffective. However, gradually the prices became lower as quality increased. Today laser printers are manufactured by many companies. Every day we use them for printing. Let's look at their principle of operation. The printing drum is a very important part of a printer. It is a cylinder coated with special material. The coating can change electric resistance in response to illumination. This is the so called photo-semi-conducting or photo-organic material. It is negatively charged. The charging is done by a specialised charger roller. Why is the printing drum charged? After charging the negatively charged surface of the printing drum is exposed with the help of a laser. The laser beam is moving over the printing drum while deflected by a moving mirror. The beam is focused with the help of a lens. It exposes the areas where the printing toner will be applied. The laser makes the areas electro-conductive. The charge from these particular areas is transferred to the metal surface of the printing drum. That is, the laser draws an electrostatic pre-image on the surface of the printing drum. Now it is time to apply the toner. It is also negatively charged. The ...
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment