All about print heads
A printer contains many parts and lots of little gadgets that make the whole thing work. There are rollers that pull in and roll out the paper as it passes through the machine. There are handles and trays and latches that keep everything in place and make it easier for users to operate. Every printer also has something called a print head, if not multiple. This part actually applies the ink or toner to the paper and is considered among the moving parts. Different types and sizes of printers have different kinds of print heads, as depicted by ehow.com.
Print heads usually have nozzles that actually spit out the ink in tiny little droplets onto the paper. The smaller the drops, the more precise the image and the more nozzles on the print head, the more colorful the final product will be. Some print heads are actually built attached to the cartridges so only one product needs to be replaced when a color has run out. Other units, though, require users to replace both cartridges and print heads. Print heads last longer than more ink or toner cartridges, but they also need to be cleaned. This process is not simple and users will need to review some instructions of how to videos.
Cartridges usually have specific slots near the print heads. The toner or ink is dispensed and heated then released through the nozzles and pressed onto the paper by the print head. That is why the print heads get so dirty and covered with a variety of colors. However, if you let these parts stay coated in junk, they will eventually stop working effectively. There are companies out there who will fix print heads, but if you as the consumer just keep up maintenance, repairs should never be necessary.