公开(公告)号：US20220388800A1

公开(公告)日：2022-12-08

申请号：US17756012

申请日：2019-12-04

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Antonio Gracia Verdugo ,  Josep Maria Bel Calavia ,  Andreu Vinets Alonso

IPC: B65H23/195 ,  B41J15/16 ,  B41J11/00

Abstract: A system (300) is provided having a printer (4) to print printing liquid onto a web (6) of media (8). The system (300) has a winding roller (10) on which to roll the web (6) of media (8) after printing. A tensioner (12) to vary the tension in a portion (14) of the web (6) of media (8) is also provided. The portion (14) is a portion of web which is being rolled onto the winding roller (10). Also provided is controller (16) to control the tensioner (12) to vary the tension based on the time taken for the printed printing liquid on the web (6) of media (8) to dry.

公开(公告)号：US20220105721A1

公开(公告)日：2022-04-07

申请号：US17418995

申请日：2019-06-05

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Andreu Vinets Alonso ,  Antonio Gracia Verdugo ,  Josep Maria Bel Calavia ,  Jordi Bas Ferrer

IPC: B41J2/045 ,  B41J2/165

Abstract: The present disclosure refers to servicing printing systems, wherein the system comprises a controller to: instruct an ejection of printing fluid from each of the nozzles within a printhead; detect, by a drop detector, drops ejected from each nozzle; determine by the controller a drop time for each nozzle, being the drop time determined between the instruction of the ejection of printing fluid from each of the nozzles until the drops ejected by each of the nozzles reaches the drop detector; and determine a nozzle health parameter in view of each nozzle drop time; wherein the method comprises comparing each nozzle health parameter with a threshold value and instructing, by the controller, a servicing operation if the nozzle health parameter is outside a threshold range.

公开(公告)号：US11260652B2

公开(公告)日：2022-03-01

申请号：US16337751

申请日：2017-01-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Antonio Gracia Verdugo ,  Pau Costal Fornells ,  Norman Guillo

IPC: B41J2/045

Abstract: A method is disclosed. The method may involve obtaining information indicative of a number of printing passes of a print head to print a swath on a printable medium. The method may comprise determining that the print head is to perform a particular printing pass which is one of: a printing pass during which an amount of print agent to be deposited from nozzles of the print head differs, by an amount that exceeds a defined threshold, from an amount of print agent to be deposited from the nozzles during a printing pass immediately preceding said particular printing pass; and a printing pass to print a swath which is the first of a plurality of adjacent swaths in which each swath has an area coverage exceeding a defined threshold. The method may comprise preparing, based on said obtained information, a schedule for a nozzle spitting procedure to commence before the print head performs the particular printing pass.

公开(公告)号：US20210291553A1

公开(公告)日：2021-09-23

申请号：US17259570

申请日：2018-12-14

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Andreu Vinets Alonso ,  Andrei Dafinoiu ,  Antonio Gracia Verdugo

IPC: B41J2/21 ,  B41J2/145 ,  B41J29/393

Abstract: In an example, a method comprises dispensing, sequentially from each of a plurality of nozzles of a print head, a respective drop of print agent to cause a print agent drop detection apparatus to output an associated signal, and determining that one of the nozzles is dispensing in a misdirected direction based on a comparison of the signals.

公开(公告)号：US20210070078A1

公开(公告)日：2021-03-11

申请号：US16958849

申请日：2018-01-08

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Antonio Gracia Verdugo ,  Aleix Fort Filgueira ,  Andreu Vinets Alonso

IPC: B41J29/393 ,  B41J2/21 ,  B41J2/045

Abstract: Examples of the present disclosure relate to a calibration method for a printing system. The method comprises printing a diagnostic pattern representative of decap time. The diagnostic pattern comprises the firing of nozzles after an exposure to ambient air during a first predetermined time period to produce a first pattern element and the firing of nozzles after an exposure to ambient air during a second predetermined time period to produce a second pattern element. The method includes scanning the resulting diagnostic pattern with a sensor to collect decap data in a digital form, digitally analyzing the decap data, the digital analysis comprising identifying a quantitative difference between the first and second pattern elements, and modifying a servicing process of the printing system if the quantitative difference passes a predetermined threshold.

公开(公告)号：US10940708B2

公开(公告)日：2021-03-09

申请号：US16492991

申请日：2017-09-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Aleix Fort Filgueira ,  Antonio Gracia Verdugo ,  Carles Flotats Villagrasa

IPC: B41J11/00 ,  B41J15/04 ,  B41J13/10 ,  B65H23/185 ,  B65H23/192 ,  B41J29/393

Abstract: It is disclosed a substrate selection method wherein the printer comprises a feeding mechanism including a feeding roller to receive a substrate roll and a media advance roller to receive a substrate from the substrate roll, the method comprising: actuating the feeding roller or the media advance roller; measuring a feeding mechanism parameter on the feeding roller or the media advance roller; calculating a substrate parameter in view of the feeding mechanism parameter; determining from a table a substrate type of in view of the substrate parameter; and selecting a preset on the printer in view of the substrate type.

公开(公告)号：US20200324550A1

公开(公告)日：2020-10-15

申请号：US16305110

申请日：2016-07-28

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Antonio Gracia Verdugo ,  Diana Pilar Pascual Soldevilla ,  Sara Echevarria Benito ,  David Toussaint ,  Mauricio Seras Franzoso

IPC: B41J2/165 ,  B41J2/125

Abstract: In an example, a method includes ejecting a print agent drop from a printhead, and determining an indication of velocity of the print agent drop. A weight parameter of the print agent drop may be determined from the indication of velocity.

公开(公告)号：US10207499B2

公开(公告)日：2019-02-19

申请号：US15544400

申请日：2015-02-27

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Mauricio Seras Franzoso ,  Antonio Gracia Verdugo ,  Marta Coma Vives

IPC: B41J2/11 ,  B41J2/21 ,  B41J2/045 ,  B41J2/125 ,  B41J2/135 ,  B41J2/165

Abstract: Examples associated with drop velocity aberrancy detection are disclosed. One example includes firing ink through nozzles of a print-head past sensors to identify drop velocities of the nozzles. A target drop velocity is selected based on the drop velocities of the nozzles. An aberrant nozzles is detected when a nozzle has a drop velocity that deviates from the target drop velocity by a selected threshold. The aberrant nozzle is deactivated, and a good nozzle that will travel over locations traversed by the aberrant nozzle is configured to print portions of a job that would have been printed by the aberrant nozzle.

公开(公告)号：US20170203562A1

公开(公告)日：2017-07-20

申请号：US15473380

申请日：2017-03-29

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： David Toussaint ,  Oriol Borrell Avila ,  Antonio Gracia Verdugo

IPC: B41J2/045

CPC classification number: B41J2/04563 ,  B41J2/04528 ,  B41J2/0454 ,  B41J2/0458 ,  B41J2/04581 ,  B41J2/04586 ,  B41J2/365 ,  B41J2/38

Abstract: A drive signal may be determined to drive a printhead to a series of target temperatures during respective portions of a print pass by the printhead. Each of the target temperatures may be the greater of a temperature of the printhead caused by printing a quantity of printing fluid to be printed during the respective portion and a predetermined threshold temperature. A drive signal may be provided to warm the printhead to the series of target temperatures during the respective portions of the print pass.

公开(公告)号：US09676180B2

公开(公告)日：2017-06-13

申请号：US14787464

申请日：2013-08-13

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Antonio Gracia Verdugo ,  Barret Kammerzell ,  Joan Albert Jorba Closa

IPC: B41J2/045 ,  B41J2/21 ,  B41J2/365 ,  B41J25/00

CPC classification number: B41J2/04505 ,  B41J2/04563 ,  B41J2/04586 ,  B41J2/2135 ,  B41J2/365 ,  B41J25/001

Abstract: Herein, techniques are described for printing an image on a print media by operation of a printhead to eject a print fluid over the print media. In at least some examples, a printhead temperature parameter is acquired, the parameter being indicative of a temperature at the printhead during printing; alignment of the printhead is corrected based on the printhead temperature parameter; printing is performed on the print media via the printhead according to the corrected alignment.