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公开(公告)号：US12277354B2
公开(公告)日：2025-04-15
申请号：US18185819
申请日：2023-03-17
Applicant: Hewlett-Packard Development Company, L.P.
Abstract: In example implementations, a method, a device, and a program are provided. The method includes detecting a power increase movement of a printer carriage. A location of the printer carriage is detected at a time of the detected power increase. Based on the detected location of the printer carriage, determine whether the print medium is damaged. The device includes a power monitor to detect a power increase during movement of a printer carriage. A locator detects a location of the printer carriage at the time of the detected power increase. A damage determiner determines, based on the detected location of the printer carriage, whether the print medium is damaged. The program detects a power increase during movement of a printer carriage. Location of printer carriage is detected at time of detected power increase. Based on detected location of the printer carriage, it is determined whether the print medium is damaged.
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公开(公告)号：US11999580B2
公开(公告)日：2024-06-04
申请号：US17756012
申请日：2019-12-04
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
IPC: B65H23/18 , B41J11/00 , B41J15/16 , B65H23/195
CPC classification number: B65H23/1955 , B41J11/002 , B41J15/165
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.
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公开(公告)号：US11745502B2
公开(公告)日：2023-09-05
申请号：US17419345
申请日：2019-07-15
Applicant: Hewlett-Packard Development Company, L.P.
CPC classification number: B41J2/04536 , B41J2/0451 , B41J2/2139
Abstract: In an example, a printing apparatus includes a controller, wherein the controller may be to compare a historic usage of a first printhead nozzle with a historic usage of a second printhead nozzle which is located on a same printhead as the first nozzle. The controller may be to determine that the historic usage of the first nozzle is higher than the historic usage of the second nozzle, and in response identify a currently operational third printhead nozzle, for which the second nozzle is able to compensate; and turn off the third nozzle, and operate the second nozzle at a higher firing frequency to compensate for the third nozzle.
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公开(公告)号：US20220088922A1
公开(公告)日：2022-03-24
申请号：US17419408
申请日：2019-06-07
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J2/045
Abstract: Example implementations relate to a method to manage printhead operational life; the method comprising firing at least one nozzle of a printhead according to an associated firing parameter to produce a respective drop of print liquid, measuring a parameter associated with the drop of print liquid, and adjusting the firing parameter in response to the measuring to reduce the measured parameter associated with the drop of print liquid on a subsequent firing while maintaining the firing parameter at or above a predetermined parameter limit to maintain print image quality.
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公开(公告)号：US20220072883A1
公开(公告)日：2022-03-10
申请号：US17417256
申请日：2019-04-11
Applicant: Hewlett-Packard Development Company, L.P.
IPC: B41J29/393 , B41J11/00 , B41J29/26 , G06F3/12
Abstract: There is disclosed a device, method and program, wherein the method comprises detecting a power increase, during which power usage increases by at least a threshold amount over an expected power usage during movement of a printer carriage over a print medium along a scan axis. The increase method further comprises detecting a location of the printer carriage at a time of the detected power usage increase and determining, based on the detected location of the printer carriage, whether the print medium is damaged.
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Patent Agency Ranking
公开(公告)号：US20210146702A1
公开(公告)日：2021-05-20
申请号：US17162910
申请日：2021-01-29
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
IPC: B41J15/04 , B41J11/00 , B41J13/10 , B65H23/185 , B65H23/192 , B41J29/393
Abstract: A printing system includes a feeding mechanism adapted to feed substrate from a substrate roll to a print zone, the feeding mechanism including a roller with an associated encoder configured to provide an encoder signal. A printhead is located in the print zone, and a controller configured to receive the encoder signal from the encoder, and to correlate the encoder signal to a substrate type.
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公开(公告)号：US20200215831A1
公开(公告)日：2020-07-09
申请号：US16492991
申请日：2017-09-27
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
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
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公开(公告)号：US10525703B2
公开(公告)日：2020-01-07
申请号：US15748141
申请日：2015-10-23
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Antonio Gracia Verdugo , Mauricio Seras Franzoso , Joan Jorba Closa
Abstract: Herein is described a method involving a drop detector. The method may comprise: ejecting ink drops from the nozzles on a printhead toward a drop detector. A drop characteristic may then be determined from the drop detector for each ink-jet nozzle. Drop characteristics for the nozzles across the printhead may be collated into a data set, and compared with a predetermined data set for a printhead having predetermined print behaviour to determine if and how the data sets differ in terms of the pattern of drop characteristics across the printheads. If the data sets differ, a recovery strategy may be selected based how the data sets differ in terms of the pattern of drop characteristics across the printheads. A system and computer readable medium are also described herein.
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公开(公告)号：US20190240973A1
公开(公告)日：2019-08-08
申请号：US16327392
申请日：2016-10-26
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Antonio Gracia Verdugo , Pau Costal , David Toussaint
IPC: B41J2/045 , B41J29/38 , B41J2/175 , B29C64/112
CPC classification number: B41J2/04505 , B29C64/112 , B41J2/0458 , B41J2/04581 , B41J2/175 , B41J2/2135 , B41J29/38
Abstract: A printer includes a print head to print by ejecting drops of a printing fluid;, a memory to store a correction measure, the correction measure to modify printing a pattern to compensate for decel, and a processor. The processor analyzes print data for a pattern that, when printed using the print head, triggers decel, controls the print head to eject drops of the printing fluid in accordance with the print data, when the analysis indicates that the pattern to be printed triggers decel, applies the correction measure upon printing the pattern, and, when the analysis indicates that the pattern to be printed does not trigger decel, does not apply the correction measure upon printing the pattern.
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公开(公告)号：US20190224966A1
公开(公告)日：2019-07-25
申请号：US16334249
申请日：2016-10-25
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Antonio Gracia Verdugo , Joan Uroz Soria , Aleix Fort Filgueira
IPC: B41J2/045 , B33Y30/00 , B33Y50/02 , B29C64/112 , B29C64/20 , B29C64/393 , B33Y10/00
Abstract: A printer includes a print head to print a pixel by ejecting drops of a printing fluid from the print head, and a controller. The controller monitors a drop volume of the printing fluid ejected by the print head. When the drop volume is below a threshold, the controller controls the print head in accordance with a first print mode to increase the frequency of ejecting drops of the printing fluid within the pixel print time with a decrease in the drop volume that maintains a print quality parameter. The controller changes to a second print mode to increase the pixel print time that maintains the print quality parameter.
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