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公开(公告)号：US11305543B2
公开(公告)日：2022-04-19
申请号：US16499894
申请日：2018-04-25
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
IPC: B41J2/165
Abstract: Example apparatus is disclosed, including apparatus for print head maintenance, the apparatus comprising a print mead maintenance device to perform a print head maintenance operation on a print head during a printing process, and a controller to cause the print head maintenance device to perform the print head maintenance operation with a parameter based on an amount of print agent applied by the print head.
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公开(公告)号：US11214068B2
公开(公告)日：2022-01-04
申请号：US16491864
申请日：2018-04-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
IPC: B41J2/165
Abstract: There is provided a maintenance apparatus to, while in a service zone, perform a cleaning operation of a set of printheads within a carriage. The maintenance apparatus comprises a cleaning structure and an actuation mechanism. The actuation mechanism is arranged to position the cleaning structure between an engaged configuration and a disengaged configuration. The disengaged configuration is activated by a first triggering element associated to the carriage interacting with the actuation mechanism subsequent to a cleaning operation. The engaged configuration is activated by a second triggering element as the carriage moves away from the service zone.
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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：US20190143679A1
公开(公告)日：2019-05-16
申请号：US16098003
申请日：2016-07-18
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Antonio Gracia Verdugo , Mauricio Seras Franzoso , Pau Costal
Abstract: There is disclosed a non-transitory machine-readable medium encoded with instructions executable by a processor and comprising instructions to: control print apparatus to print a test pattern 11 on a test region of a print medium 4; receive test data relating to the test pattern 11 printed on the print medium 4 from a sensor 8; analyse the test data with reference to baseline data to determine if the test pattern 11 satisfies a print quality criterion; output an instruction to operate the print apparatus in a first mode, in which a pre-printing treatment is not applied to the print medium, in response to determining that the test pattern 11 satisfies the print quality criterion, the pre-printing treatment comprising wiping a printing surface of the print medium with a wiper element 10, 20; and output an instruction to operate the print apparatus in a second mode, in which the pre-printing treatment is applied to the print medium 4, in response to determining that the test pattern 11 satisfies the print quality criterion.
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公开(公告)号：US10112386B2
公开(公告)日：2018-10-30
申请号：US15327954
申请日：2014-07-30
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Abstract: A printer is disclosed. The printer spits printing fluid from nozzles using a spit pattern. The spit pattern is non-uniform along the spit pattern length.
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Patent Agency Ranking
公开(公告)号：US20180222182A1
公开(公告)日：2018-08-09
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
CPC classification number: B41J2/04561 , B41J2/04505 , B41J2/04508 , B41J2/04558 , B41J2/0456 , B41J2/04586 , B41J2/12 , B41J25/308
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：US09701113B2
公开(公告)日：2017-07-11
申请号：US15027993
申请日：2013-10-14
Applicant: Hewlett-Packard Development Company, L.P.
CPC classification number: B41J2/04551 , B41J2/04586 , B41J2/165 , B41J2/16517 , B41J2/1652 , B41J2/16526 , B41J2/16579 , B41J2002/16561 , B41J2002/16573
Abstract: The present disclosure discloses a method implemented by a printer to control a fluid firing unit of a printhead, when said printhead is coupled to the printer, to operate according to any one of a normal printing mode and a recovery mode. According to the method, if the fluid firing unit is operated according to the normal printing mode, a first voltage is applied to the fluid firing unit to fire the fluid firing unit during a printing operation; and if the fluid firing unit is operated according to the recovery mode, a second voltage higher than the first voltage is applied to the fluid firing unit to clean the fluid firing unit.
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公开(公告)号：US12277352B2
公开(公告)日：2025-04-15
申请号：US18042834
申请日：2020-08-27
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Maurizio Bordone , Eduardo Amela Conesa , Mauricio Seras Franzoso
Abstract: Examples include a method for operating a printing device comprising a specific pen. The method comprises receiving future specific pen firing data related to a plurality of upcoming successive print jobs and collecting historical specific pen firing data. The method further comprises determining a level and timing of servicing of the specific pen in function of both of the received future specific pen firing data and of the collected historical specific pen firing data.
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公开(公告)号：US11123991B2
公开(公告)日：2021-09-21
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
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.
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公开(公告)号：US10518530B2
公开(公告)日：2019-12-31
申请号：US16098003
申请日：2016-07-18
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Antonio Gracia Verdugo , Mauricio Seras Franzoso , Pau Costal
Abstract: There is disclosed a non-transitory machine-readable medium encoded with instructions executable by a processor and comprising instructions to: control print apparatus to print a test pattern 11 on a test region of a print medium 4; receive test data relating to the test pattern 11 printed on the print medium 4 from a sensor 8; analyse the test data with reference to baseline data to determine if the test pattern 11 satisfies a print quality criterion; output an instruction to operate the print apparatus in a first mode, in which a pre-printing treatment is not applied to the print medium, in response to determining that the test pattern 11 satisfies the print quality criterion, the pre-printing treatment comprising wiping a printing surface of the print medium with a wiper element 10, 20; and output an instruction to operate the print apparatus in a second mode, in which the pre-printing treatment is applied to the print medium 4, in response to determining that the test pattern 11 satisfies the print quality criterion.
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