Abstract: A printing system and a method for printing a plurality of images on a first web and on a second web are disclosed. The printing system includes a print head, a feed unit for feeding both the first web and the second web simultaneously to the print head in a feed direction relative the print head, a wrap up unit for wrapping up both the first web and the second web simultaneously to form a first output roll and a second output roll respectively, a user interface configured to set a printing arrangement of the plurality of images on the first web and the second web and to input the print head, the feed unit and the wrap up unit for performing printing according to the printing arrangement by ejecting marking material on the respective webs. The printing system includes a prediction module for predicting a first diameter of the first output roll and a second diameter of the second output roll based on the printing arrangement.

Abstract: In a method for fixing a print image on a recording medium, data is determined for controlling one or more radiation sources to fix the print image. The data can be determined based on a deformation model of the recording medium such that a deformation of the recording medium is reduced or minimized.

Abstract: A method of nesting three-dimensional print objects on a print surface of a printer, wherein the locations for the print objects on the print surface are determined in view of the shape and size of the footprints of the objects so as to minimize the surface area required for accommodating the objects, and the locations for the print objects are determined also in view of intended heights of the objects, and objects with equal or similar height are grouped together, the method comprising a step of grouping the objects into classes of objects with similar heights, and a step of nesting the objects class by class, wherein the method is performed on a printer having a print head movable relative to the print surface in a main scanning direction and sub-scanning direction normal to the main scanning direction, and wherein the objects of each class are nested in a separate shelf that extends in the main scanning direction on the print surface and has a constant width in the sub-scanning direction.

Abstract: An assembly is provided for moving a carriage, the assembly comprising a carriage beam arranged for supporting the carriage, which is moveably arranged along the carriage beam, a cable carrier for supporting a cable, the cable carrier being attached to the carriage and comprising a plurality of carrier segments distributed along a length of the cable carrier, and a flexible support element arranged along the carriage beam for supporting the cable carrier along a track.

Abstract: A method of calibrating a wiper position in an ink jet printer having a nozzle plate and a wiper arranged to wipe the nozzle plate, the nozzle plate having a number of nozzles each of which is in fluid communication with a pressure chamber, each pressure chamber having an actuator for exciting a pressure wave in a liquid in the pressure chamber, and a detection system arranged to detect pressure fluctuations in the pressure chamber includes adjusting the wiper to a position in which it is set against the nozzle plate; exciting a pressure wave in at least one of the pressure chambers; recording the pressure fluctuations in said at least one pressure chamber; deciding, on the basis of the detected pressure fluctuations, whether the wiper is set correctly against the nozzle that is in fluid communication with said at least one pressure chamber; and correcting the position of the wiper if necessary.

Abstract: Fluid jetting device comprising: a nozzle plate, a fluid chamber terminating in an orifice in the nozzle plate, an actuator for generating a pressure wave in a fluid in the fluid chamber to jet fluid through the orifice from the chamber, a jetting waveform generating device connected to the actuator for generating an excitation waveform comprising two separated pulses, called a jetting pulse and a quenching pulse, for respectively generating a pressure wave in the fluid in the fluid chamber leading to a fluid droplet and for substantially cancelling a pressure wave in the fluid in the fluid chamber, wherein the jetting waveform generating device is adapted to make, when jetting two consecutive fluid droplets, a first and a second droplet, the jetting pulse of the second droplet at least partially overlap the quenching pulse directly following the jetting pulse of the first droplet.

Abstract: A roll-fed printing apparatus for printing at least a first and a second image on a recording medium, a method for controlling such a printing apparatus and a software medium are disclosed.

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: An inkjet print head comprises a fluid channel, the fluid channel including a pressure chamber; a piezo actuator including an active piezo stack and a membrane, the active piezo stack being provided at a surface of the membrane and the membrane forming a flexible wall of the pressure chamber, and a cavity having a cavity dimension determining a wall dimension of the membrane. The method of manufacturing such a print head includes selecting a desired actuator compliance; manufacturing a first print head layer including the piezo actuator; determining at least one actual actuator property of the piezo-actuator; determining a desired wall dimension based on the actual actuator property such that the combination of the piezo actuator and the membrane having the desired wall dimension provides for the desired actuator compliance; and manufacturing a second print head layer including the cavity.

Abstract: A method of scheduling print jobs for printing on a printer which has printing elements provided for printing in a number of different colors, characterized by the steps of: a) calculating, for each color, a constraint time which specifies a time at which the printing elements for the respective color should be either operated or subjected to a maintenance treatment in order to avoid a risk of malfunction; b) calculating, for each of a plurality of print jobs that have been scheduled already and are waiting in a print queue, an operation time at which the printing elements will be operating in the course of the processing of the print job; and c) when a new print job is to be scheduled and the print jobs, including the new print job, comprise at least one job in which printing elements for at least one color are not operated, determining a sequence of the print jobs in the print queue, with corresponding recalculation of the constraint times and operation times, with an aim to extend the constraint times by o

Abstract: The present invention relates to a radiation curable ink composition including a gellant. The present invention further relates to an ink set having such ink composition. The present invention further relates to a method for making such ink composition and a printing method using such ink composition.

Abstract: An inkjet printer having at least one print head in which an aerodynamic element is placed before (e.g. in a transport direction) a recording medium (e.g. in the form of a sheet or page or plate) to reduce or avoid turbulences that may arise due to the relative motion between print head(s) and recording medium at an edge of the recording medium.

Abstract: In a print server for digital high-capacity printing systems, print jobs are received, processed with predetermined application processes, and relayed to one or more printers. A method to operate the print server can include monitoring, using a collect trigger, status parameters which describe system statuses; and triggering, using trigger logic, filters to reading additional status parameters that include process statuses of application processes executed at the print server. The triggering of the filters can be based on whether the system statuses monitored with the collect trigger represent an extraordinary or abnormal operating status.

Abstract: An ink supply system for supplying ink to a drop-forming unit of a print-head in a printing apparatus includes a reservoir for holding or storing a volume of liquid ink to be supplied to a drop-forming unit in a print-head, and a heating device arranged upstream of the reservoir for heating the ink to an desired operating temperature. The heating device includes a heating body for transferring heat to the ink, wherein the heating body includes a plurality of channels which extend from an top side of the heating body to an bottom side of the heating body for conveying the ink to the reservoir, whereby the ink is heated via contact with walls of the channels. The heating body typically includes a substantially monolithic body of a highly thermally conductive material and the plurality of channels are substantially parallel channels which extend through the heating body. A print-head of a printing apparatus incorporating the ink supply system, and a heating device are also disclosed.

Abstract: A printing suction system for a printer can include at least one print bar with at least one print head, and at least one suction device arranged in proximity to an underside of the print bar thereby forming a gap through which a recording medium that can be printed to by the print bar can be directed. The suction device can extend along at least a portion (or the entire) width of the print bar. The section device can generate a suction pressure based on a suction pressure profile to suction and smooth the recording medium.

Abstract: A degassing device can include one or more passive components, such as a gas-permeable membrane. The passive components may not directly be monitored. The state (e.g. the permeability) of the passive components may be reliably determined via evaluation of pressure information with regard to the pressure (e.g. negative pressure) in the degassing device.

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: A method is provided for forming an image on a recording medium in a printer, the printer comprising a print head assembly for applying a curable ink on a recording medium to form the image, a transport path arranged for moving the recording medium in a transport direction along the print head assembly and a curing system; said curing system comprising a curing source, which curing source is arranged extending over the transport path in the transverse direction; the method comprising the steps of: moving the recording medium through the transport path in a step-wise movement in the transport direction along the print head assembly and the curing system; applying the curable ink on the recording medium by the print head assembly to form the image; and curing the curable ink, which is applied on the recording medium, by the curing source in a curing zone on the recording medium, the curing zone extending over the transport path in a transverse direction, the transverse direction being substantially perpendicula

Abstract: In wide format web printing the loading of a new web medium is a cumbersome process, requiring the operator to raise a very wide flexible web from the supply roll up to the print surface. The present invention provides a simple apparatus to aid in the manual loading process. The web transport assembly of the apparatus comprises a supply unit arranged for supplying the web from a media roll to a transport path and a pick-up device comprising a pick-up surface and a holding mechanism configured for releasably holding a leading edge section of the web onto the pick-up surface, wherein the pick-up device is moveable between a first position near the supply unit for attaching the leading edge section and a second position near the print surface. The leading edge section is moved upwards towards the print surface while held by the holding mechanism.

Abstract: A roll-fed printing apparatus and a method for controlling a roll-fed printing apparatus for printing images on at least one recording medium from an image queue. A part of the image queue is saved. The part comprises the ripped images at established arbitrary positions on the roll of medium and events according to a plurality of event image objects placed in the image queue into a roll file which is stored in a history roll queue storage of the controller. At least part of the ripped images saved in the roll file are reprinted on a new roll of medium having a same roll width as the arbitrary roll width according to a sequence order and the arbitrary positions saved in the roll file. During reprinting, the corresponding events saved in the roll file are executed.