Abstract: A compensation device configured to attenuate pressure variations in an ink printing head is provided. The device includes a first compensation chamber containing ink and having a bottom, an outlet orifice extending through the bottom, and an inlet orifice opposite the bottom; a second compensation chamber containing ink and having a bottom, an inlet orifice extending through the bottom, and an outlet orifice opposite the bottom; and a vent means allowing outflow of air contained in the compensation chambers. The vent means includes a first opening in the first compensation chamber; a second opening in the second compensation chamber operable to be in a lower position with respect to the first opening when the device is in an operating position in which the bottoms of the compensation chambers define lower walls of the corresponding compensation chambers; and an intermediate chamber communicating with the first opening and the second opening.

Abstract: According to the present application, a printing unit is provided. The printing unit may include a first print head, a second print head, a UV pinning light source between the first print head and the second print head and a UV curing light source on an outer side of one or the other of the first print head and second print head. A printing apparatus of the type that uses liquid ink for printing on the surfaces of printed circuit boards is also provided. With the present application, it is possible to print high resolution images in one single pass.

Abstract: A printing unit is provided having a moveable printing head with a nozzle plate having a plurality of nozzles to eject liquid ink; a cleaning station having a cleaning surface with at least one suction element to generate air suction; the cleaning station configured to clean the nozzles when the printing head overlaps with the cleaning station so that the nozzle plate and the cleaning surface at least partially overlap; a movement actuator means configured to move the printing head with respect to the cleaning station between a first position in which the suction element overlaps a first end of the nozzle plate and a second position in which the suction element overlaps a second end, opposite the first end, of the nozzle plate. A proximity sensor means measures a distance between the nozzle plate and the cleaning surface.

Abstract: A printing unit is provided having a moveable printing head with a nozzle plate having a plurality of nozzles to eject liquid ink; a cleaning station having a cleaning surface with at least one suction element to generate air suction; the cleaning station configured to clean the nozzles when the printing head overlaps with the cleaning station so that the nozzle plate and the cleaning surface at least partially overlap; a movement actuator means configured to move the printing head with respect to the cleaning station between a first position in which the suction element overlaps a first end of the nozzle plate and a second position in which the suction element overlaps a second end, opposite the first end, of the nozzle plate. A proximity sensor means measures a distance between the nozzle plate and the cleaning surface.

Abstract: A compensation device configured to attenuate pressure variations in an ink printing head is provided. The device includes a first compensation chamber containing ink and having a bottom, an outlet orifice extending through the bottom, and an inlet orifice opposite the bottom; a second compensation chamber containing ink and having a bottom, an inlet orifice extending through the bottom, and an outlet orifice opposite the bottom; and a vent means allowing outflow of air contained in the compensation chambers. The vent means includes a first opening in the first compensation chamber; a second opening in the second compensation chamber operable to be in a lower position with respect to the first opening when the device is in an operating position in which the bottoms of the compensation chambers define lower walls of the corresponding compensation chambers; and an intermediate chamber communicating with the first opening and the second opening.

Abstract: An improved photoplotter for obtaining high resolution films from computer digitized images is equipped with active plate system with a plurality of luminous sources and a counter-plate which form an air cushion within which is inserted the film to be exposed. The film is supported on one side by a plotter movement system that moves it within a field of a portion of the entire image divided into a raster, so that the entire image can be obtained with the corresponding luminous sources.

Abstract: The object of the invention is to provide a machine for the control of printed circuits, of the type comprising a board bearing (1) a plurality of conductive needles that are connectable on their reverse side to analysis means of the electric parameters between one and the other needle, characterized in that are used two needle boards, one opposite to the other (1, 1′) and between them is positioned for the analysis the respective printed circuit card (2); and, one board is made movable respect to the other, the needles are axially movable.

Abstract: A machine for the electric testing a printed circuit board. The machine having a plurality of adjacent coplanar needle board pairs, wherein each of the plurality of coplanar needle board pairs has first and second coplanar needle boards to be located on opposite sides of the printed circuit board and a plurality of needles located on each of the coplanar needle boards. Each of the coplanar needle boards being independently movable from each other and the printed circuit board.