Abstract: An ejection device includes a tile made of a material having a first coefficient of thermal expansion (CTE). The tile carries a chip that forms a plurality of ejection units and is in thermal contact with the tile. The chip is mainly made of a material having a second CTE different from the first CTE, wherein each ejection unit is capable of ejecting droplets of a liquid and comprises a pressure chamber and a flexible wall delimiting the pressure chamber. The flexible wall has a deformation compliancy that depends upon at least one mechanical design parameter of the chip. In operation at a temperature different from room temperature, the ejection units have uniform ejection properties, while the compliancies of the flexible walls of at least two of the ejection units are different from one another at room temperature.

Abstract: An inkjet printing assembly is configured for providing an imaging liquid on a recording medium. The inkjet printing assembly comprises a transport path for transporting an intermediate medium and the inkjet printing assembly has arranged along said transport path a first inkjet print station for ejecting a process liquid on an intermediate medium prior to ejecting the imaging liquid on the intermediate medium; a second inkjet print station for ejecting the imaging liquid on the intermediate medium; a spreading treatment station arranged between the first print station and the second print station for treating the process liquid on the intermediate medium before receiving the imaging liquid on the intermediate medium; and a transfer station for transferring at least the imaging liquid from the intermediate medium to the recording medium.

Abstract: A printer includes a media storage device, a print engine and a media supply system for supplying print media from the media storage device to the print engine. The printer is arranged to print media-related information onto media that are left over in the media storage device after a print process. The media storage device includes a tray arranged for accommodating cut media sheets and having an auxiliary printer for printing the media-related information onto a sheet in the tray.

Abstract: A print head has a tile made of a material having a first coefficient of thermal expansion (CTE). The tile carries a chip that forms a number of printing elements and is in thermal contact with the tile. The chip is mainly made of a material having a second CTE different from the first CTE. A stress relief plate is made of a material having a third CTE that is closer to the second CTE than the first CTE and is bonded to the tile with a first adhesive layer having a first thickness d1. The chip is bonded to the stress relief plate with a second adhesive layer having a second thickness d2 smaller than the first thickness d1.

Abstract: A method to increase the print quality of a printer can include determining sensor data corresponding to a print image printed by a print head of the at least one print head of the printer onto the recording medium; determining, based on the sensor data, undulation information corresponding to unevenness of the recording medium, a distance between the one or more nozzles of the print head of the printer and the recording medium varying due to the unevenness; and printing, based on the undulation information, a subsequent print image with the print head of the printer. The printer can include at least one print head including one or more nozzles that are configured to fire ink droplets onto a recording medium to generate a print image on the recording medium.

Abstract: An inkjet printing assembly is configured for direct inkjet printing on a recording medium and for indirect inkjet printing via an intermediate medium. The inkjet printing assembly comprises a transport path for transporting a print medium. Further, a control unit is provided for selecting the print medium, wherein the print medium is may at least be a recording medium or an intermediate medium. An inkjet print station is provided and arranged along the transport path for providing droplets of a liquid on the print medium. A transfer station is provided and configured for transferring the droplets of the liquid from an intermediate medium to a recording medium. A recording medium output station is provided for receiving the printed recording medium.

Abstract: The invention relates to a printing system 1 adapted to carry out print jobs on the basis of print job data supplied to a controller 37 of the printing system 1 and to discharge resulting printed job pages at a first job output 52. The printing system 1 comprises a sheet scheduler 373 configured to schedule test pages during the printing of the print jobs. The sheet scheduler 373 is configured to adapt a time schedule for printing the test pages to a content type 401 of each page of each print job.

Abstract: In a drying system for a printing system, a plurality of dryers can be arranged along a drying route to dry a recording medium. The plurality of dryers can including multiple resistive heating elements configured to dry the recording medium. The dryers can be supplied via two or more supply lines with an alternating current having a sequence of alternating positive and negative half-waves. A controller of the drying system can be coupled to the dryers and can couple the dryers uniformly on average with the at least two supply lines given positive and negative half-waves based on a nominal temperature curve along the drying route. The controller can jointly couple the resistive heating elements of a corresponding dryer with a multiphase supply grid or jointly decouple the resistive heating elements of the dryer with the multiphase supply grid during a half-wave.

Abstract: In a printing system and a corresponding method, different nozzles of a print head can be activated to eject a nominal ink quantity with different ejection pulses to at least partially compensate for non-uniformities between the different nozzles due to crosstalk. The compensation can reduce system-dependent streaking of the print image.

Abstract: In a method for an inkjet printing system, substantially parallel lines are printed in the transport direction with nozzles at different longitudinal positions along the transport direction of the recording medium. Based on the variations of the transversal distance of corresponding image points of the substantially parallel lines, the transversal movement of the recording medium may be detected and a dimension of the transversal movement may be determined.

Abstract: A print fleet system includes a plurality of printer instances, which have a same set of at least one system setting. A registration system registers print jobs in combination with system settings of the same set of at least one system setting. An advice system generates advice for an operator. The registration system includes a value change made to the set of at least one system setting of a printer instance before printing a print job on the print engine. The advice system is configured to generate advice related to the same print job intended to be printed on another printer instance, the advice concerning the change includes in the registration system. The advice system is configured to transmit signals representing the advice to a user interface screen in order to advise the operator before printing the same print job on the other printer instance.

Abstract: The present invention relates to a printer control system for controlling the printing of an object on a support in a number of passes on top of each other. The object has a surface of varying height. The printer control system comprises a user interface which has a display device and is arranged to visualize in a window on the display device a pixel-precise preview image before printing of the object. The preview image comprises a representation of the surface of the object.

Abstract: A method for printing on a plurality of sheets includes the steps of: arranging the plurality of sheets on a support surface of an endless conveyor, the plurality of sheets including a first sheet and a second sheet being arranged at a sheet-to-sheet distance between one another; advancing the plurality of sheets on the support surface in a conveying direction along a print head assembly for applying droplets of ink on the sheets; providing a suction force through perforations arranged in the support surface for holding the plurality of sheets on the support surface, wherein the suction force provides an air flow through uncovered perforations present in the sheet-to-sheet distance in a print region between the print head assembly and the support surface; and forming an image by the print head assembly on each of the plurality of sheets supported on the support surface of the conveyor by applying droplets of ink.

Abstract: A liquid ejection head includes a first ejection opening group in which a plurality of ejection openings that eject a particular kind of liquid onto a print medium are arranged in a predetermined direction, and a second ejection opening group that is provided along the first ejection opening group to eject the particular kind of liquid onto the print medium. The first ejection opening group is provided upstream of the second ejection opening group with respect to a relative moving direction between the print head and the liquid ejection head. The plurality of ejection openings included in the first ejection opening group are disposed in the predetermined direction in a zigzag shape, and the liquid ejected from the ejection openings adjacent to each other in the predetermined direction come in contact with each other on the print medium.

Abstract: A printing system comprises a first bearing support for a first media roll of a first print medium and a second bearing support for a second media roll of a second print medium. Said first and second bearing supports are spaced apart from one another. A first print transport path extends from the first bearing support from the first media roll to a main transport path of the printing system. A second print transport path extends from the second bearing support to the main transport path of the printing system. An attachment transport path extends between the first and the second bearing support. The attachment transport path allows both print media to be brought together and attached to one another. Thereby, a relatively stiffer medium may be attached as a leader section to a relatively weaker medium.

Abstract: An orifice surface is provided with a coating. A molecule for forming the coating is bonded to the orifice surface through a silicon-carbon bond. The molecule constituting the coating comprises exactly one fluoro-atom. A print head is provided with such orifice surface. In addition, a methods of manufacturing such orifice surface and a method of printing using a print head provided with such orifice surface are disclosed.

Abstract: An electronic circuit for driving an inkjet print element in an array of print elements with an electric waveform is provided. The print element includes a piezo transducer for converting the electric waveform in a mechanical displacement. The electric waveform is tunable for an individual print element. The circuit includes a common waveform generator that is connected to the piezo transducer through a first print data dependent switch for providing an electric waveform independent of the print element. The circuit further includes a waveform tuning part, dependent on the print element and the print data, for controlling a second switch that adds electric energy from a voltage source to the electric waveform. The switches are operable in either a saturation state or a blocking state to limit an amount of dissipation in the switches.

Abstract: An ink-jet printing method includes printing an image with at least one ink on a recording medium, and applying a cover liquid on the image formed with the at least one ink within 1 s after printing the image with the at least one ink. An ink-jet printing apparatus includes at least one printing unit for printing an image with at least one ink on a recording medium, and an application unit for applying a cover liquid on the image formed with the at least one ink.

Abstract: An ink bottle closure for an ink re-fill bottle includes a first closure member configured to be fixed to an ink bottle, the first closure member including a seal, arranged to be located over an outlet opening of the bottle, and a second closure member attached to the first closure member and movable relative to the first closure member between a closed position, in which the second closure member covers the seal, and an open position in which the seal is exposed to be pierced or ruptured for dispensing ink from the bottle through the outlet opening. An ink bottle having an ink bottle closure and a dispensing device for opening an ink bottle closure are also disclosed.

Abstract: A method of controlling a printing system that is arranged to process a sequence of media sheets and is operable with a finite number of different settings includes calculating a time to finish that will be needed for processing the sequence, scheduling a sequence of sheets for printing, defining a set of possible settings for processing the scheduled sequence, calculating a time to finish for each setting in the defined set, selecting the setting with the smallest time to finish, and processing the sequence with the selected setting.