An inkjet printing device includes a vacuum flatbed table configured to support large and flat substrates with applied vacuum power and while printing, in a hold down area, against the vacuum flatbed table; and a removable flat substrate support device configured to support large and flat substrates while printing; wherein the vacuum flatbed table is configured for coupling the removable flat substrate support device stationary to the vacuum flatbed table by applied vacuum power.

A method of generating print data for an inkjet printhead having a plurality of ink planes. The method includes the steps of: receiving image data for a print job in a printer controller; retrieving keep-wet pattern data for each ink plane of the printhead, the retrieved keep-wet pattern data being determined using one or more input parameters; generating first print data for each ink plane in the printer controller based on the received image data; merging the first print data with the keep-wet pattern data to provide second print data for each ink plane; and sending the second print data from the printer controller to the printhead, thereby causing the printhead to print an image together with a keep-wet pattern. The keep-wet pattern is defined by a plurality of dots printed at a frequency sufficient to maintain hydration of each nozzle in the printhead.

A printing assembly has print heads, by the use of which, application locations for printing fluid are specified. A transport path through the printing assembly, and provided for print stock, is specified by at least two guide elements. One printing section of the transport path begins at a first application location and ends at a last application location. The application locations are arranged on that transport path having specifying guide elements, each having a pivot angle, and pivoting, in a pivoting manner, about at least one pivot axis, common thereto, which pivot angle equals at least 10. A main conveying direction is specified by a linear connection between a first guide element based on the print section and a last guide element based on the print section. The main conveying direction is arranged, having guide elements arranged in the maintenance position thereof, under an angle of 30, at maximum, to a vertical direction. The invention further is directed to a method for operating a printing assembly.

A printer includes a page wide array of printing elements extending in a first orientation and co-located with a media path extending in a second orientation generally perpendicular to the first orientation. The printer is selectively operable according to a calibration involving current calibration values for a first subset of the page wide array of printing elements and a substitute calibration value for at least one non-first subset printing element of the page wide array immediately adjacent to at least one of the first subset printing elements.

A printing apparatus includes a medium supporting portion for supporting a medium, a head for printing on the medium, a medium pressing member that includes a plurality of materials stacked thereon, and a platen heater for heating the medium pressing member. The medium pressing member includes a base portion being attached to the medium supporting portion, and an eaves portion which forms a gap with the medium supporting portion and suppresses floating of the medium from the medium supporting portion. The base portion includes a first material for forming a first surface being attached to the medium supporting portion, and a second material for forming a second surface on an opposite side of the first surface, and a coefficient of thermal expansion of the first material is higher than a coefficient of thermal expansion of the second material.

A method of multi-color printing in a single pass using a fixed pagewide array of monochrome inkjet printheads. The printheads are aligned with each other in a media feed direction and the method includes the steps of: feeding print media along the media feed direction past a first printhead positioned furthest upstream in the array, a third printhead downstream of the first printhead and a second printhead positioned furthest downstream in the array; printing a yellow ink onto the print media using the first printhead; printing a black ink onto the print media using the third printhead; and printing a cyan or magenta ink onto the print media using the second printhead.

In some examples, an accessory usable with roll media and an image forming system having an output member, comprises a leader member to attach to the output member of the image forming system, and a clip attached to the leader member, the clip to removably attach the leader member to the roll media in an installed state. The clip includes a first section to contact a first surface of the roll media, a second section to contact a second surface of the roll media, and a magnetic unit mounted on a surface of the first section, a magnetic field of the magnetic unit to attract the first and second sections toward one another to grip the roll media.

A printer includes a modular vacuum belt assembly for moving print media in a media feed direction along a media path. The modular vacuum belt assembly includes a plurality of moving belt modules interconnected along a width of the media path. Neighboring moving belt modules are interconnected via a connecting fixed vacuum plenum.

A method of generating a diagnostic plot for a printing system includes printing a first half of a diagnostic pattern representative of a first state of the printing system, and printing a second half of the diagnostic pattern representative of a second state of the printing system. Variation of the diagnostic pattern from an adjacent diagnostic pattern indicates the printing system is out of specification.

An inkjet printer is provided that is configured to store a plurality of pieces of gap information respectively corresponding to a plurality of examined sections discretely arranged along a head moving direction on a recording sheet, each of the plurality of examined sections including a corresponding one portion of top portions and bottom portions on the recording sheet, and calculate interpolation gap information to be interpolated over a whole width in the head moving direction of at least one of a plurality of segments, each of which has a width in the head moving direction defined by two adjacent sections of the plurality of examined sections, based on the stored gap information.