Canon InkTec Refill Kits

Canon is using thermal inkjet technology. This technology centres on a disposable print cartridge. The basic principle of the thermal inkjet is to apply heat to a tiny measure of ink until it expands and is propelled through a nozzle.

The first step in the process is to fill a small reservoir, known as the firing chamber, with ink.

The next step is to heat the ink with a thin-film resistor layered above the firing chamber. As the ink heats up, it expands to form a bubble. The bubble continues to expand and finally bursts.

At the instant the bubble bursts the ink is forced through the nozzle located below the firing chamber and out onto the paper, this is why they call it bubblejet.

As the bubble collapses, the ink in the orifice retracts, breaking off the ejected drop and drawing the meniscus into the orifice. The surface tension in this deformed meniscus produces the suction to draw in fresh ink to refill the chamber.

This process is repeated up to 12,000 times a second and creates residual heat in the resistor. A layer of silicon is placed above the resistor to cool it by transferring the residual heat away.

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