Cost-effective reliability

Corona wires are widely used in toner-based printer engines, being a highly reliable, cost-effective component for producing the various charging and discharging cycles in photoreceptors, drums and belts.
Corona wires allow extremely uniform charging, even in the fastest high-resolution printers. Regular cleaning ensures corona wires offer a long service life. Modern office equipment designs enables precise control of the ozone generated by corona wires during operation.
Carefully selected tungsten alloys are used as the base material. The finished product is a pre-mounted corona wire with eyelets, springs, terminals or other connecting devices.

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Uses and finishes

Corona wires are used in various stations as charge, pre-charge, clean transfer or separation coronas. They have tightly-controlled diameter tolerances and offer the highest tensile strength for any given diameter, enabling maximum pre-tensioning to avoid vibration at minimal diameters.

A range of different surface finishes is available to reduce contamination and the onset of corrosion on the wire surface:

• Chemical cleaning: the tungsten wire has no additional surface finish, in this state the wire already has superior purity and smoothness.
• Oxidisation: a controlled oxidation process deposits a thin, even layer of tungsten oxide that tempers further oxidation in the printer engine processes
• Gold or platinum plating: the tungsten wire is covered with a thin layer of precious metal to suit the specific print engine processes. This coating significantly increases the service life of the corona wire.

The cleaning interval depends on the surface finish selected.