HP INCFollow


In the digital large format textile business, the drying system is one of the most important subsystems in

the printer. The objectives of this system are dry the media enough so that there is no transfer between

the rolled media and the following one, and to provide a hot air (airflow and temperature) in the print

zone to reduce bleed and coalescence. And one of the most critical parameters in the dryers is the control

of the temperature uniformity along the scan axis in the print zone. A fine control of the temperature

uniformity increases the media versatility by enabling lower temperatures in the print zone while drying

and increase the during capability level. Also improves bleed and coalescence and other image quality

artifacts. In several printers, the drying system is based on convection with a hot chamber flowing hot air

through several diffusers to the print zone.

In those drying systems, in most of the cases, the temperature uniformity can be achieved by separating

the chamber in several modules. Each module controlled independently. This article shows another

method: using a unique hot chamber but implementing a distributor on front of each pair fan/heater with

the temperature sensor located behind the distributor. In this implementation, the fans/heaters, with the

distributors, provide a very good temperature uniformity along the whole chamber. And, with the

temperature sensors behind the distributors, the variability of the measures can be controlled much


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Creative Commons License
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