I am in a hurry to share my experience.
If you have an old cartridge from a laser printer, and you are wondering how it is arranged, Forget! Forget about this cartridge and use Google! and honestly. Believe me, it will be better!
But if there is a rebel inside you, and after reading the previous paragraph, you definitely decided to find out what is inside, then you need it! I have warned! For you, as well as those like me, who needed spare parts from the cartridge, the following advice is devoted. So then:
You won’t find anything interesting inside. The principle of operation of the cartridge is quite simple. But even in an empty cartridge there is a lot of worked toner, which flies very well throughout the room and settles on everything you can, so...
Do not open the cartridge in the room. It is also not necessary to do this in the kitchen, in the hallway and in the apartment in general! It is best to open it in some abandoned house, which then is not a pity to burn, because it will be almost impossible to wash it!
3) In an extreme case, at home, you can carefully open the cartridge in the bathroom. If you decide to do this, then pre-close the walls and everything possible with a polyethylene film. It is much easier to throw away a dirty film than to wash everything around.
4) It is worth to dress in advance in clothes, which is not unfortunate to throw away, because there is a high likelihood that the toner will not wash off.
5) It is important! Do not try to dust-sugging the awakened toner! A vacuum cleaner with a HEPA filter. In the best case, you will have to change the filter. At worst, you will see the evil Negro in the mirror in a black room, where everything is covered with a thin, but almost unwashable layer of toner!