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Assembly and function
72800115 Markoprint X4JET
The HP print head works with original Hewlett-Packard ink cartridges. The HP print
heads are available as single model or as cascaded version up to four print heads. A
single print head has a maximum print height of 12.5 mm and increase 12.5 mm with
each further print head as cascaded version (four print heads = 50 mm).
Functional principle:
The ink is located in the ink channels of the printer cartridge, while its viscosity prevents
any leakage.
A heating element, which generates a steam bubble when current is briefly applied (1.9
µs), is fitted behind each jet opening.
This steam bubble gives the ink between the heating element and the jet opening an
impulse and therefore "shoots" a defined quantity of ink out of the opening.
When the steam bubble reforms, a corresponding quantity is drawn from the storage
container and the process can begin again. This process of ejecting an ink drop can be
repeated 10,000 times a second.
There are different special inks, which allow a coding on many surfaces. Specially
qualified are inks for absorbent and semi absorbent surfaces. For non-absorbent
surfaces are solvent inks available. The drying time can be realized with a blower or
heater.
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