BUBBLE JET
A bubble jet printer is designed in the similar manner as an ink jet printer It contains an ink cartridge and a print head. The ink cartridge is divided into several small chambers and each chamber has a metal plate and tube. Ink is supplied from the top of this tube. At the bottom of each chamber is a small pinhole which is used to spray ink on the paper.
How Bubble jet works:
For a chamber to spray ink, it is stimulated by an electric signal sent to its heating element.
Heat vaporizes the ink from the element and causes it to expand, thus pushing the ink out of the pinhole in the form of a bubble.
As the vapor expands, the bubble eventually gets large enough to break off into a droplet.
The rest of the ink is pulled back into the chamber by the surface tension of the ink.
When another drop needs to be sprayed, the entire process as stated above is repeated.
Upon completion of the printing job, the printhead docks itself in the maintenance station. A small suction pump and an ink absorbing pad pull the ink through the nozzles using vacuum suction and absorb the expelled ink. This keeps the printer in good condition all the time.
