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It's Positive

It’s Positive!

Linx 8900 Continuous Ink Jet

By Chris Pangallo, Product Manager – Continuous Inkjet (CIJ) and Laser 

Many companies have the need to mark discrete variable information such as lot codes and expiration dates on their products. One of the best solutions available to address this need is Continuous Ink Jet printers (CIJ). CIJ offers non-contact high speed coding with immediate dry times resulting from the solvent based inks that are used.


Back in the day, CIJ technology relied on factory supplied air to produce the pressure required to both push drops of ink out of a printhead and to suction drops through a gutter to be recycled into the ink delivery system (this recycling is the “Continuous” part of CIJ). Linx Printing Technologies was the first CIJ producer to introduce a printer that generates its own pressure by using an internal pump. This provided both operational savings and increased printer uptime. CIJ was free of factory air!


So, why would you want to add air back to a CIJ printer?


CIJ fluid is returned to the ink delivery system via a gutter in the printhead. With this cycle there is a risk for contaminants such as water vapor, dust, or other particulates to be introduced into the ink system. The addition of Positive Air minimizes the introduction of contaminants.

Positive Air is an option for Linx printers. It does not rely on factory air. It is a pump connected by tubing to a CIJ printhead. The pump provides a consistent 8 psi airflow that pressurizes the printhead cover without disturbing the ink jet stream.  The airflow acts to prohibit the introduction of contaminants into the ink delivery system, resulting in longer ink life. With the reduction in contaminants, the ink has better retention of conductivity and less variance in viscosity.  Overall printer performance is improved with less wear on internal filters and in some cases extends the amount of time between Preventative Maintenance.


There is a small effect of solvent loss from the jet as the air flows over it, but this is marginal. And there is no real increase in gutter flow, as the air flows down and out of the hole at the front of the printhead cover tube.


At Diagraph, we are dedicated in solving your coding and labeling challenges. Diagraph has been assisting customers for over 120 years improving production line efficiencies with simple, reliable, cost-effective coding and labeling solutions. Contact us to learn more about the Linx product line. Visit us at or contact us at 800.722.1125.


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