Canon Production Printing Patente

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<div notation="docdba" type="abstract" xml:lang="en"><p>A method of controlling a user interface (12) having a screen (16) and being arranged to display a plurality of display items (11-17) on the screen (16) simultaneously in a configurable layout, the layout specifying at least one of:- a selection of display items (I1-I4) to be displayed simultaneously;- a configuration of windows (20) that are assigned to the display items to be displayed; and- a level of detail for at least one of the display items to be displayed,the method being characterized by the steps of:- selecting a subset of said plurality of display items (I1-I7);- entering a single command for concurrently changing, for each display item (I1-I4) in the subset, at least one of the configuration of windows (20) and the level of detail; and- for each display item in the subset, translating the single command into an item-specific command adapted to the display item, and executing the item-specific command.</p></div>

An electric circuit for monitoring a condition of an ink ejection unit in an array of ink ejection units (111, 112, 113, 114) is described. Each ejection unit comprises an ink channel connected to a piezo-electric element. The monitoring is done by a measurement of a residual pressure wave in the ink channel. The circuit comprises a controllable switch (4) for making contact with the piezo-electric element, a comparator (8) for comparing an electric signal from the piezo-electric element with a reference signal, a digital memory (6) for saving a digital reference signal and a digital-analog converter. In this circuit each piezo-electric element or group of elements is associated with a specific part of the digital memory, comprising a corresponding reference signal. This enables a parallel monitoring of several ejection units during printing.

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Method for determining a colour gamut of a printing system. The method comprises the steps of printing samples of an object on a substrate. The samples vary with respect to a thickness of the samples and ink ratios of the ejected inks. For each printed sample a reflectance is measured by means of a spectrophotometer. The measured reflectances are fit with a formula derived from the Kubelka-Munk theory comprising derivations of an absorption coefficient and a scattering coefficient of the ejected inks and transmission and/or reflection coefficients at interfaces between ink and air and vice versa, and between ink and substrate. A full colour gamut of the printer is determined by using the Kubelka-Munk theory by means of the derived coefficients and the derived coefficients are stored in a print controller of the printing system.

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The invention relates to sheet printer and a method for a sheet printer. The sheet printer comprises a media support plane, a print controller, a print head and a user interface comprising a preview window comprising a representation of the media support plane. The print controller is configured to receive at least one digital image intended to be printed on a media piece, to receive position information of the position of the media piece on the media support plane, to display a representation of the media piece in a preview window, to determine a first part of the at least one digital image which fits on the media piece when printed and a second part of the at least one digital image which does not fit on the media piece and will not be printed, and to display a representation the first part as an at least partial overlay on the presentation of the media piece according to at least one first visual parameter. The print controller is further configured to display a representation of the second part in the preview window according to at least one second visual parameter, which deviates from the at least one first visual parameter.

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A method for printing a digital image in swaths with a swath time corresponding to the width w1 of the digital image on the image receiving medium 2 in the main scanning direction X. The print controller 10 issues a trigger that a spitting action for at least part of the printing elements 8 of the print head 4a, 4b, 4c, 4d, 4e needs to be performed. A swath time of subsequent swaths is gradually increased until the print head reaches a maintenance tray 11 at a side of the print surface 1. The print head stays at the maintenance tray 11 until air between the print head and the maintenance tray 11 has approximately reached a standstill. Then the at least part of the printing elements 8 of the print head are spitting marking material in the maintenance tray 11. After the spitting the swath time of subsequent swaths is gradually decreased until the swath time is corresponding again with the width w1 of the digital image on the image receiving medium 2 in the main scanning direction X. The invention further relates to a digital inkjet printer configured to perform the above mentioned method.

User interface for displaying printing process information of a printing system, wherein the user interface comprises a first display item for displaying a value of a relative humidity of an environment of the printing system, a second display item for displaying a value of a temperature of the environment of the printing system, a third display item comprising an indicator for indicating that the displayed relative humidity value or the displayed temperature value is outside value ranges which are predetermined for a proper functioning of the printing system.

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The invention relates to a flatbed printer and a method for the flatbed printer. The flatbed printer comprises a flatbed area for placing at least one media piece to be printed upon. The flatbed area comprises a plurality of non-printing areas on which ejecting recording material is not allowed, but on which media piece placing is allowed. The print controller receives at least one print job comprising print data to be printed on the at last one media piece and controls the printing of the at least one received print job on the at least one media piece. An armature is constructed to move over the flatbed area in at least one direction and a print head is configured to eject recording material on the at least one media piece and attached to the armature. The print controller receives a digital image intended to be printed by ejecting the recording material directly on the flatbed area, and determines - before printing of the received digital image - for each non-printing area in the flatbed area which is covered by at least part of the ejected recording material when the digital image is directly printed on the flatbed area, an environment of and including the non-printing area. The print head is then ejecting the recording material directly on the flatbed area according to the digital image except in each environment determined by the print controller.

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A method for coating a flat substrate by a coater 1 comprising an entry station 11 for receiving the flat substrate 10 to be coated, a control system 14 for controlling print job data, print job settings and coater settings, an application module 12 comprising a supporting roller 26 for supporting the flat substrate 10 and an application roller 27 for transferring a layer of coating from a surface of the application roller 27 towards the flat substrate 10, an end station 13 for storing the flat substrate 10 when coated, and a first sensor 29 for determining a radius of the application roller 27. The application module 12 is configured to transport the flat substrate 10 from the entry station 11 in-between the supporting roller 26 and the application roller 27 towards the end station 13, wherein the method comprises the steps of a) the control system 14 receiving print job data and print job settings, b) the control system 14 determining a suitable impression of the application roller 27 by means of received print job settings, c) the first sensor 29 determining a radius of the application roller 27, d) determining an axis location of the application roller 27 having a distance of the radius 28 of the application roller 27 plus a nominal thickness of the flat substrate 10 read from the print job data minus the determined suitable impression from the supporting roller surface, e) automatically moving the application roller 27 to the determined axis location 273, and f) starting the transport of the flat substrate 10 from the entry station 11 in-between the supporting roller 26 and the application roller 27 towards the end station 13.

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