A+ Study Guide: Printers

INKJET PRINTER (Cont…)

Paper Feed Assembly

Paper tray / Feeder:	Like the name suggests, a Paper tray is where the papers can be loaded while a Feeder pulls open at an angle and can be located at the back of a printer. The main advantage that a paper tray has over a Feeder is that a feeder cannot hold many pages.
Roller:	Roller aids in smooth transfer of pages from the paper tray into the printer.
Paper Feeder Stepper Motor:	This supplies power to the roller and ensures that the papers are fed into the printer at a uniform speed so as to enable the printer to print a seamless image.

A Transducer is located at the back of the reservoir of each nozzle.The transducer receives a tiny electric charge that causes it to expand. When the transducer expands inward, it forces a tiny amount of ink out of the nozzle.When it recedes out, it pulls some more ink into the reservoir to replace the ink sprayed out.