Hewlett-packard Development Company, L.p.

Alex Andrea Tallada

Luis Garcia Garcia

Ronald Albert Askeland

Francisco Lopez Moral

Jan Morovic

Peter Morovic

Brian J Keefe

Lawrence H White

Xavier Bruch

Raimon Castells De Monet

Marta Coma Vives

Juan Manuel Garcia Reyero Vinas

Luis Garcia

David Ramirez Muela

Thomas Michael Sabo

Xavier Quintero Ruiz

Jeffrey Allen Wagner

Chandrasekhar Nadimpalli

Gonzalo Gaston Llado

David Claramunt Morera

Marian Dinares Argemi

Joan-Albert Miravet Jimenez

Maria Dinares Argemi

Maria Magdalena Martinez Ferrandiz

Daniel Vincent Keane

Carmen Blasco Cortes

Xavier Bruch Pla

Ángel Martínez Barambio

Yit Hong Tor

Yi Hong Tor

Alyssa Michelle Siegman

Ronald A Askeland

Jeffrey A Wagner

Daniel V Keane

Alyssa M Siegman

A method includes printing an image on substrate by a printhead using ultraviolet (UV) curable ink. The method includes selectively applying a first amount of UV radiation by a first region of a light source to a first area of the image after a first amount of time passes from printing the first area to form a first gloss level area having a glossy finish. The method also includes selectively applying a second amount of UV radiation by a second region of the light source to a second area of the image after a second amount of time passes from printing the second area to form a second gloss level area having a matte finish. At least one of the second amount of UV radiation is greater than the first amount of UV radiation and the first amount of time is greater than the second amount of time.

Formation of gloss level areas having a glossy finish and a matte finish in an image

An example method involves analyzing a plurality of perturbations of a printing system over a period of time, calculating statistics corresponding to each of the plurality of the perturbations of the printing system, after the duration of the period of time, executing an enhancement process for the printing system based on the calculated statistics of each of the perturbations, and adjusting settings of the printing system based on results of the enhancement process.

Adjusting print settings based on perturbation statistics

Implementations disclose a method and system for providing a self-adaptive image. According to one implementation, a first non-white ink layer on is deposited on a substrate. Furthermore, a white ink layer is deposited over the first non-white ink layer and below a second non-white ink layer deposited thereon.

Method and system for providing a self-adaptive image

A printer is disclosed. The printer is calibrated for use with colored media. The printer is calibrated by converting an original color look up table (CLUT) for use on any colored media to a modified CLUT for use on colored media with a measured color. Each of a plurality of output colors in the original CLUT are modified using the measured color of the media.

Printer calibration for media color

The present disclosure relates particularly but not exclusive to a method for printing in a multipass print mode using a first printhead (PT) and a second printhead (PT), the method including printing in a first pass a first image in a first area of a print medium using a first set (ST) of nozzles (N-N) from the first printhead (PT), printing in a second pass a coating layer over the first image using a second set (ST) of nozzles (P-P) from the second printhead (PT), and printing in a third pass a second image over the coating layer using a third set (ST) of nozzles (N-) from the first printhead (PT).

Method of printing in a multipass mode and a printing apparatus for implementing such a method

A printer is disclosed herein. The printer has a printhead having a plurality of ink nozzles for ejecting ink, a servicing mechanism for capturing the ejected ink from the ink nozzles, to service the printhead, and a control device coupled to the printhead and the servicing mechanism for regulating the servicing. As part of the regulation, the control device continues feeding a substrate towards the printhead during an idle period. The idle period of the printhead can be a duration when printing on the substrate is suspended. Further, the control device regulates ejection of ink from the ink nozzles towards the substrate during the idle period and operates the servicing mechanism during the idle period. In an example, the servicing mechanism captures the ink before the ink reaches the substrate.

Servicing a printhead of a printer

A method in a printer comprising a first printhead to dispense a first printing fluid and a second printhead to dispense a second printing fluid, the first and second printheads being arranged on a common scan axis that is substantially perpendicular to a media advance direction. The method comprises controlling movement of the first and second printheads relative to a media being printed, between a first index position and a second index position, the second index position being downstream of the first index position, and wherein the movement occurs during a time period between a forward scan and a reverse scan of the first and second printheads across a media being printed.

Indexing printhead

A printing fluid delivery system includes a reservoir, a conduit system, and a first heating module. The reservoir may store printing fluid. The conduit system may include a plurality of conduit segments to transport the printing fluid between the reservoir and the printing fluid applicator. The first heating module may selectively heat one conduit segment to increase a temperature of the printing fluid therein to a first temperature which is greater than a second temperature of the printing fluid in an other conduit segment, and to thermally induce recirculation of the printing fluid.

Thermally-induced recirculation of printing fluid

In one example of the disclosure, a first area of an image to be printed at a first gloss level is identified. A second area of the image to be printed at a lesser second gloss level is identified. Printing of the image is caused in a gloss-varying printmode that applies a pretreatment fluid to a media where the second area is to be printed, and not where the first area is to be printed, and applies a colorant or colorants to the media where the first and second areas are to be printed.

Printing images with varied gloss levels using pretreatment fluid

An example printer or method involves recognizing artifacts in a digital image of at least a part of a nozzle plate, and triggering a nozzle plate cleaning routine if the recognized artifacts cover more than a predetermined threshold.

Nozzle plate cleaning

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Barcelona, Spain

Alex Andrea Tallada