Hewlett-packard Development Company, L.p.

Gianni Cessel

Xavier Alonso Becerro

Ricardo Sanchis Estruch

David Chanclón Fernández

Joan Sanjuán Mercadal

Ignacio De Olazábal Zugasti

Emilio López Matos

Marcos Casaldaliga Albisu

Jose Luis Valero Navazo

Lluis Abello Rosello

David Toussaint

Jeffrey Allen Wagner

Xavier Soler Pedemonte

David Chanclon Fernandez

Francesc Roure Pastor

Jose Luis Valero

Guido Charosky

Carles Carmona Calpe

Dorkaitz Alain Vazquez Fernandez

Francisco Javier Pozuelo

Francisco Javier Pérez Gellida

Maurizio Bordone

Jordina Torrents Barrena

Annarosa Multari

Joan Singla

Ricard Silvestre

Dorkaitz Alain Vazquez

Javier Onecha

Juan Carles Rubio

Javier Onecha Celestino

Pablo Carmelo Mena Rodriguez

Ma Pilar Velazquez Gomez

Joan Sanjuan Mercadal

Santiago Felez Navarro

Jaume Verges Llahi

Andrew Maxwell Frost

José Maria Montserrat Caldero

Emilio Löpez Matos

Ignacio De Olazabal Zugasti

Jose Ma Montserrat Caldero

Emilo Lopez Matos

Jeff Allen Wagner

Oscar Moya

Jeffrey A Wagner

David Chancion Fernandez

A print apparatus is disclosed. The print apparatus comprises a print fluid application unit having a plurality of nozzles through which print fluid is to be deposited onto a printable medium during a printing operation. The print apparatus also comprises a nozzle cleaning surface to engage nozzles during a nozzle cleaning operation. The print apparatus also comprises a scanning unit and a controller. The controller is to control the print fluid application unit to deposit print fluid from nozzles of the plurality of nozzles according to an intended pattern onto the nozzle cleaning surface; control the scanning unit to scan the pattern formed on the nozzle cleaning surface; and responsive to determining, based on the scan, that print fluid from a nozzle of the plurality of nozzles has not been deposited according to the intended pattern, generate an instruction signal regarding maintenance of the print fluid application unit. A method and a machine-readable medium are also disclosed.

Print apparatus maintenance

Apparatus is described that comprises a printer carriage (), comprising a printhead (), at least one sensor () for scanning an image deposited on a print media by the printhead () and a spectrophotometer () connected to the at least one sensor () for generating data based on a reference image () on a test print media (). The sensor () is calibrated based on the generated data to detect a specific ICC profile, and wherein, in use, the sensor () scans and digitizes an image of a final print media as the image is being printed on the final print media; and wherein the sensor () is connected to a controller () that performs image quality analysis of the digitized image to determine whether colour deviation has occurred.

Printer colour deviation detection

An example scanner assembly includes a housing formed with corners to allow an image sensor line to align cornerwise. An example scanner apparatus may include a plurality of scanner assemblies with an image sensor line oblique to the media advance direction.

Image sensor line orientation

An image digitizing apparatus has an image digitizing sensor to read an image from media passing the image digitizing sensor, and a transport to move the media past the image digitizing sensor. The transport includes a first driven transport element, and a second driven transport element biased towards the first driven transport element. The first driven transport element and the second driven transport element receive the media therebetween.

Image digitizing apparatus and image digitizing method

Examples of a method for detecting misalignment cause a printer to print a calibration pattern on a recording medium sheet. The calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet (or to spaced positions along a line where folding of the recording medium sheet by a folding apparatus is intended to take place). When the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of the plural measurement scales are printed at the reference locations on the recording medium sheet.

Detecting misalignment

In some examples, a media stacker includes a drawer defining a chamber, and a plurality of moving elements to engage media sheets of different sizes as the media sheets are output from a system. The plurality of moving elements are to slide the media sheets to a target position in the drawer, and the plurality of moving elements are to disengage from the media sheets once the media sheets have reached the target position. A plurality of retaining elements are to engage the media sheets of the different sizes as the media sheets slide into the drawer.

Media stacker to receive media sheets

A printing system includes a print bar, a plurality of printheads installed on the print bar and an auxiliary printhead moveable parallel to the print bar. A number of first nozzles of the auxiliary printhead substitute for a number of second nozzles of the printheads during a nozzle servicing operation performed on the second nozzles.

Printing system servicing

A sensor can sense a weight of items in an area. A sensor can sense a height of items in the area. An available capacity of the area can be determined based on the sensed weight and height.

Determining an available capacity

A drawer defines a chamber to receive a media sheet from a system. A moving element is to engage the media sheet as the media sheet is output from the system. The moving element is to slide the media sheet to a target position in the drawer, and the moving element is to disengage from the media sheet once the particular media sheet has reached the target position. A retaining element is to engage the media sheet as the media sheet slides into the drawer.

Media stacker to receive media sheets from a system

According to one example, there is provided a printing system having a print bar on which are installable multiple printheads. The system comprises a nozzle servicing module moveable across the length of the print bar to selectively perform a nozzle servicing operation on a group of printhead nozzles.

A sheet scanner comprises a sheet inlet on a front side, a scanned sheet outlet on a rear side, and a deflector to direct scanned sheets from the outlet towards the front side of the scanner, over the top cover thereof, and further comprises a stopper on the top cover, at the front side of the scanner and above the sheet inlet, to temporarily restrain the leading edge of a scanned sheet such that the sheet advances and folds over itself and beyond the stopper, the leading edge being released from the stopper when the sheet folded over itself and beyond the stopper pulls it downwards.

Sheet scanners

Ink drying apparatus and method for controlling ink drying apparatus are described herein. An example ink drying apparatus includes first and second heating elements positioned adjacent a drying area in a printer, and a controller to determine a temperature of the heating area and to selectively operate, based on the temperature determination, the first heating element in a burst mode and the second heating element in an on/off mode.

Ink drying apparatus, methods to control ink drying apparatus, and power control apparatus to control ink drying elements

According to one example, there is provided a controller readable medium on which are stored controller readable instructions. The instructions are such that, when executed by a controller, perform the steps of commencing the printing of a print job on a media sheet, determining when about half of the media sheet ejected out of a printer media output is at the level of a stacker unit, activating a first array of fans to retain a portion of the ejected media sheet, completing the print job, and activating a second array of fans to blow the trailing edge of the ejected media sheet over the stacker unit.

Print storage

An inter-device media handler is configured to handle a print job in a print system having two or more media processing devices, such as a printer and a laminator. A sensor is configured to sense orientation of media buffered between the first media processing device and the second media processing device. A calculator module is configured to receive input from the sensor and to use the input to determine whether the media will stay within a working range of the second media processing device while the job is processed by the second media processing device.

Inter-device media handler

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Sant Cugat del Valles, Spain

Gianni Cessel