Have you ever wondered how your inkjet printer works?

How will the ink get from the inkjet cartridge to the paper?  Why is the print quality is thus clear?  Why the printing is therefore quiet?

Typically, all that most folks grasp is that there is some movement and a faint high pitched sound when it’s printing something — and then the finished document comes out.

Not like dot matrix and character printers that strike ribbons to create a picture, inkjet printers don’t physically touch the paper.

All inkjet printers function using the same basic principles.  Little ink droplets are “jetted” (or pushed) out multiple holes onto paper during a controlled and systematic fashion.  This is often where the term “inkjet” comes from.

The dimensions of ink droplets, speed and reliability of this type of printer has been continuously improving since its inception in 1976.  In 1993, Epson was the primary manufacturer to supply an inkjet printer using micro-piezo technology.  The Epson Stylus 800 was the first printer to use the multi-layer actuator printhead (the printhead is the part of the printer that holds various little nozzles that really squirts the ink onto paper).

This specific printhead utilised an electro-mechanical component that acted sort of a small management room.  When pulses of electricity suffered, it that gave specific signals to fireplace individual or multiple nozzles loaded with ink.

Micro-piezo technology used a tiny crystal in every individual nozzle that when electrically energized, would vibrate or bend causing a controlled amount of ink to be forced out onto paper.  When {the electrical} current is off, the crystal bends back to its original shape, making a vacuum, so pulling ink into the nozzle from the reservoir for the following commanded fire.     

The Epson printhead was fixed to the carriage therefore it never needed replacing (the printer carriage is what moves laterally across the paper).  This also kept the cost of ink cartridges low since they were little additional than reservoirs of ink.

This breakthrough printer made a whopping 360 dpi (dots per inch) that was deemed, virtually “letter quality” at the time.  With a printing speed of 150 - a hundred and eighty characters per second, the new Epson became the user favorite printer for home and office.

At the same time, HP was employing a similar technology.  A thermal jetting system was utilised in their printhead.  The printhead still acted just like the control room however every individual nozzle was instead independently super heated by electricity, which caused the ink to explode onto the paper.  HP claims the temperature of a fired inkjet nozzle approaches that of the surface of the sun.

HP elected to put the printhead on the inkjet cartridge itself rather than mounting it permanently to the carriage.  Since every inkjet cartridge would have its own printhead, replacement cartridges would be a lot of expensive for these printers.

HP inkjet cartridges conjointly could not print as fast as Epson as a result of every nozzle required to cool down when firing.  This heating technology also limited the sorts of inks that might be used.

In the 1990’s, Canon, Epson and HP designed printheads that applied even smaller droplets of ink, drastically improving dpi and resolution.

Whereas Canon and HP might produce a half dozen - ten picoliter droplet size from one nozzle, Epson was regarding [*fr1] the scale (between 3 - half-dozen picoliters).   Currently, there are printers offered which can produce an incredible one picoliter droplet!  To induce an idea of how small this is; somebody’s hair is about twelve picoliters in diameter.  Most human eyes cannot see one jetted droplet of ink on paper.

Inkjet printers have come a long manner since their 1st inception.

Printers these days are twice as fast as their predecessors were, and are cheaper than ever.  Many printers can simply turn out color photo quality images in at an unimaginable 6000 dpi.

As time goes on and as demand for printing remains high, the quality, speed and options of inkjet printers will solely continue to improve.

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