A light irradiation device includes a heat sink provided with a heat pipe, an LED substrate disposed to be in contact with the heat sink, and an enclosure that houses the heat sink and the LED substrate. The LED substrate has a light-emitting area in which a plurality of LED elements is arranged. When viewed from a direction orthogonal to a main surface of the LED substrate, part of the heat pipe is located inside the light-emitting area and another part of the heat pipe is located outside the light-emitting area.

There is described a printing press (100) comprising a printing group (2) adapted to apply on a substrate at least one ink or varnish vehicle containing magnetic or magnetisable flakes and at least one magnetic orientation unit (10) located downstream of the printing group (2) along a path of the substrate, which magnetic orientation unit (10) includes at least one magnetic-field-inducing device (12) adapted to orient the magnetic or magnetisable flakes contained in the ink or varnish vehicle applied on the substrate to induce an optically-variable effect in the ink or varnish vehicle. The printing press (100) further comprises a drying/curing unit (15) located along the path of the substrate and cooperating with the magnetic orientation unit (10), which drying/curing unit (15) is adapted to dry or cure the ink or varnish vehicle applied on the substrate following orientation of the magnetic or magnetisable flakes. The drying/curing unit (15) is mounted on a movable supporting structure (16) that is adapted to move the drying/curing unit (15) between a working position (WP), where the drying/curing unit (15) is cooperating with the magnetic orientation unit (10) and which is located proximate to the path of the substrate next to the magnetic orientation unit (10), and a retracted position (RP), where the drying/curing unit (15) is retracted away from the magnetic orientation unit (10) and from the path of the substrate.

Provided is a heat radiating apparatus for radiating heat of a heat source in air. The heat radiating apparatus includes a support member in close contact with the heat source on a first principal surface side, a heat pipe supported by the support member, and a plurality of heat radiating fins in a space that faces a second principal surface to radiate the heat transferred by the heat pipe. The heat pipe has a first line part thermally joined with the support member, a second line part thermally joined with the heat radiating fins, and a connecting part. A plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface.

A method of drying print agent is disclosed. The method comprises blowing hot air onto an absorbent printable medium that bears water- and/or solvent-based print agent to reduce the viscosity of the print agent and to promote absorption of at least some water and/or solvent in the print agent by the printable medium; and, subsequent to the blowing of hot air, irradiating the printable medium with ultraviolet radiation to dry the unabsorbed portion of print agent on the printable medium. A printer ink drying apparatus and a print apparatus are also disclosed.

A light irradiating device includes a plurality of LED elements which is disposed on a substrate along a first direction and irradiatesan ultraviolet ray on an irradiating object; and a plurality of light collecting units which is disposed in an optical path of each LED element and forms the ultraviolet ray emitted from each LED element to have a narrow spread angle, in which the ultraviolet ray which passes through the light collecting unit to be directed to the irradiating object has a first light distribution peak which is inclined to an upstream side of the first direction at a first angle and a second light distribution peak which is inclined to a downstream side of the first direction at a second angle, with respect to a second direction which is perpendicular to the first direction.

The present invention relates to a retention apparatus comprising a) a retention body, which delimits an inner region at least on a first side and a further side opposite to the first side, and b) at least one spring element;
wherein the retention body comprises, on the first side, a first receiving portion facing the inner region and, on the further side, a second receiving portion facing the inner region; wherein the retention apparatus is embodied to retain at least one optical module, which has a light input side and an opposing light output side, by means of the first receiving portion, the second receiving portion, and the at least one spring element in a retention state,
in such a way that the at least one optical module in the retention state is retained a. in a first direction extending from the light input side to the light output side by means of an interlock of i. the at least one optical module with the first receiving portion and ii. the at least one optical module with the second receiving portion, and b. in the opposite direction to the first direction by means of a spring force of the at least one spring element directed against the at least one optical module.

Further, the invention relates to a luminaire having the retention apparatus according to the invention; a printing machine having the luminaire according to the invention; a production method using the luminaire according to the invention; and uses of the retention apparatus according to the invention; and of the luminaire.

A heating circuit having an array of switching heating elements (e.g., field effect transistors, thin film transistors) provides a transient heat pattern over a surface (e.g., substrate, imaging member surface, transfer roll surface) moving relative to the heating circuit, to produce a pixelated heat image and heat a target pattern on the surface. Heat is generated by current flow in the heating elements, and the power developed by the heating circuit is the product of source-drain voltage and current in the channel. Digital addressing may accomplished by matrix addressing the array. Current may be supplied along data address lines by an external voltage controlled by digital electronics understood by a skilled artisan to provide the desired heat at a respective heating element pixels addressed by a specific gate line. The circuit may include a current return line that may be low resistance, for example, by using a 2-dimensional mesh.

A drying assembly comprises a plurality of electromagnetic energy sources arranged to dry printing fluid deposited onto a surface of a substrate, by evaporation of a solvent fluid therefrom. The drying assembly further comprises a conveyor system configured to move the substrate in a conveying direction, and a focusing system configured to focus electromagnetic energy from the plurality of electromagnetic energy sources to form a non-uniform heating pattern on the surface of the substrate. The non-uniform heating pattern comprises a plurality of spatially separated higher and lower intensity regions distributed along the conveying direction.

A printing machine for printing on a printing substrate web includes a plurality of inline flexographic printing units which are disposed in a plane accessible to an operator of the machine. Each one of the two flexographic printing units of a respective duplex printing station includes a respective impression cylinder and a dryer disposed between the two impression cylinders along a path of web travel of the web of printing substrate. A method of operating the printing machine is also provided.

In some examples, a machine for generating optically variable image elements on a substrate includes a printing substrate infeed and a printing unit including a printing mechanism by which a substrate guided on a transport path is printed with a coating agent containing magnetic or magnetizable particles. A device for aligning the magnetic or magnetizable particles includes a first alignment device in the transport path and a further alignment device arranged upstream therefrom. During normal operation, the further alignment device is fixed to a frame at the transport path. The further alignment device includes a plurality of magnets that are spaced apart from one another transversely to the transport direction and, during operation, remain stationary. The number of magnets included in the further alignment device correspond to a number of columns of image-producing print motifs or groups of image-producing print motifs around a circumference of a forme cylinder.