Some teachers don’t like to use Laser Pointers in the class

HP and CANON toner cartridges used mainly by the five major consumables and toner composition, but there are many auxiliary parts is critical and essential. The OEM production of Laser Pointers has high requirements for the equipment the manufacturer uses. 
Wiper seal bunker: bunker port to assist in the magnetic roller in the toner seal in the bunker. Waste bunker sealed smears: is responsible for cleaning scraper scraped waste toner collected in the waste bunker. These two components are continuously rotating parts in the following, thus requiring a good heat resistance, wear resistance, not easy to deformation, and can not be perfect, otherwise it would be magnetic roller, drum causing wear and tear. Stirrer: Different types of toner box with different shapes, different materials, mixing equipment, toner cartridges in accordance with the shape, size and orientation in the machine designed to ensure that the printing process have enough magnetic toner supply roller. The use of Laser Pointers plays an important role in the class. Magnetic roller felt: in many types of cartridges, magnetic roller two have felt material, its role is to seal the task, because it is located below constantly rotating magnetic roller, requires its own texture, dense and difficult to distort, not easy to loose, smooth surface (or rotation of the magnetic roller produce resistance), and to heat, wear. In recent years, high-speed machine, with a hard metal material instead of felt, its life is more assured. HP and CANON Laser printer drum is used in function separated type organic photoconductor, also called OPC, which is formed by the layered structure, the first layer is aluminum, as other layers of the stent is also the current path; The second layer is called the adhesive layer or barrier layer, to increase the adhesion of the next coating of aluminum to prevent the charge while the dark decline, this layer is optional. Some teachers don’t like to use Laser Pointers in the class.
Place the third layer is called the charge layer, is responsible for receiving laser irradiation produces electron-hole pairs; the fourth layer is called the charge transport layer is responsible for conduction charge; fifth layer is the protective layer and increase the wear resistance of the drum, this layer is optional. General drum at least the first aluminum layer, the second layer charge layer occurs, the third layer charge transport layer, this three-tiered structure is essential. We often hear the drums drum with cold and hot drum, in fact, refers to the level of sensitivity of the photosensitive drum, the drum sensitivity refers to the light of a certain degree of sensitivity, its potential use after receiving the light down to half the required energy of Countdown said.