A machine for drying inks of the UV type, the machine including a supporting frame, which forms at least one exposure chamber, which can be accessed from the outside and accommodates at least one UV ray emission source. On the supporting frame, there is at least one carriage which supports rotatably at least one pan for supporting at least one object to be processed which is provided, on its surface, with at least one print provided by UV inks. Elements are furthermore provided for the rotational actuation of the pan; the carriage is movable in order to move the pan from an exposure position to at least one respective access position, in which the pan is arranged outside of the exposure chamber, in order to allow the loading or unloading of the object on or from the pan.

An irradiation device includes: an irradiation, unit that irradiates a target with light; at least one component that is arranged in an advancing direction of light reflected by the target; and a light blocking unit that is arranged between the target and the at least one component in the advancing direction and blocks the reflected light.

A UV curing system and method for providing an adjustable beam profile are disclosed for UV curing for ultra high speed industrial applications, such inkjet printing, with improved print quality and efficiency. Also provided is a lamp head assembly for a UV source for such a system, which provides an adjustable beam profile for optimizing UV curing. The lamp head assembly comprises one or more light sources and reflectors or other optical elements, which may be relatively movable and adjustable, to adjust the beam profile to processing conditions and requirements for consistent curing efficiency and print quality at different print speeds. Specific features of such a lamp head assembly may permit adjustment of the spectral, spatial and temporal distribution of light for improved or optimized curing efficiency in ultra-fast UV curing applications.

A digital print head, a digital printing machine having the head, and a method for digital printing on substrates using the head, the digital print head having an ejector for ejecting a product onto the substrate; a drying element for acting on the product ejected onto the substrate such that it is dried; and shielding element to prevent the ejected product from directly reaching the drying element by spray. Likewise, the drying element is located with respect to the ejector in such a way that when the product is ejected it may be subjected to the drying that may be provided by the drying element.

Provided is a light source device in which the housing is not full of heat, and the risk of inhaling dust in the housing or the risk of reduction of life of the fan device becomes reduced. In an aspect, a light source device according to the present disclosure includes a light source; a light source control unit for controlling turning on/off and a quantity of light of the light source; a cooling fan for cooling the light source; and a fan control unit for controlling a number of revolutions of the cooling fan, wherein the fan control unit is configured to: control the number of revolutions of the cooling fan to become a first number of revolutions depending on the quantity of light of the light source when the light source is turned on, and control the number of revolutions of the cooling fan to become a second number of revolutions lower than the first number of revolutions by waiting for a predetermined waiting time when the light source is turned off.

Examples described herein include method for calibrating LED modules in a curing engine. The method of calibrating UV curing modules includes receiving an uncured calibration image and initiating a curing operation that includes operating the curing modules according to a plurality of corresponding initial power level settings to apply radiant energy to the uncured calibration image to generate a cured calibration image. The method further includes receiving user input or information about an image characteristic of the cured calibration image from a user. The method then includes analyzing the user input to generate adjustments to the corresponding initial power level settings, and then applying the adjustments to the corresponding initial power level settings to generate a plurality of corresponding adjusted power level settings.

A light emitting device includes a substrate, a plurality of light emitting elements arranged in three or more rows on the substrate, and a light-transmissive member including a cylindrical lens portion having an array of three or more cylindrical lenses arranged parallel to each other along the rows of the light emitting elements so that each of the cylindrical lenses is on one of the three or more rows of light emitting elements. The rows of the light emitting elements are arranged with substantially uniform intervals. The cylindrical lens portion includes first cylindrical lens portions including at least cylindrical lenses at outermost sides of the array, and a second cylindrical lens portion arranged at an inner side of the first cylindrical lens portions and having a height greatest in the cylindrical lens portion.

The curing assembly of this invention has one or more fiber optic cables, each transmitting light to a head, which distributes the light onto a substrate in a desired geometric pattern and intensity. Little or none of the heat generated by a light source is transmitted to the vicinity of the substrate. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 C.F.R. §1.72(b).

Inkjet printing on a plastic card using a radiation curable ink is described herein. After the ink is applied to the card surface (i.e. the printed surface), radiation, such as UV radiation, is directed onto a non-printed surface of the card (for example, a perimeter side edge surface and/or a surface of the plastic card opposite the printed surface the radiation curable ink is applied to) in order to at least partially cure any of the applied ink that may have flowed onto or that may otherwise be disposed on the non-printed surface. This prevents contamination of a drive mechanism used to transport the plastic card via the perimeter side edge surfaces or via the opposite surface prior to full curing of the ink applied to the printed surface.

A liquid discharge apparatus includes a liquid discharge head, a drying unit, and circuitry. The liquid discharge head performs a liquid discharge operation that includes discharging liquid onto a medium. The drying unit radiates heat to dry the liquid adhering to the medium. The circuitry moves the liquid discharge head. Further, the circuitry changes a drying target position on the medium after the liquid discharge head performs the liquid discharge operation. The drying target position is an area where the heat from the drying unit reaches.