UV radiation device for e.g. printing machine, for UV hardening fresh printing ink on printed sheet, has UV-LED array arranged at distance to material sheet to be irradiated and perpendicular to transport direction over irradiation breadth

摘要

The device (30) has an illumination arrangement perpendicularly extending over a breadth of a continuous material web or material sheet (29) that is movable in a transport direction (28). Multiple UV-LEDs (22) are combined as a radiation source in a UV-LED array (2). The array is arranged at a distance to the material sheet to be irradiated and perpendicular to the transport direction over an irradiation breadth. The irradiation breadth is reduced by switching off the UV-LEDs in a lateral border region of the illumination arrangement.