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公开(公告)号：US11872811B2
公开(公告)日：2024-01-16
申请号：US17419408
申请日：2019-06-07
IPC分类号： B41J2/045
CPC分类号： B41J2/04513 , B41J2/0456 , B41J2/0458 , B41J2/04561 , B41J2/04563 , B41J2/04581
摘要： 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：US20220024200A1
公开(公告)日：2022-01-27
申请号：US17311460
申请日：2019-01-30
摘要： Examples relate to a method to print a print job. The method comprise comparing an operational parameter of the print job with a reference operational parameter and determining to perform a maintenance task during the print job based on at least a result of comparing the operational parameter with the reference operational parameter. If the maintenance task is to be performed, the method further comprises determining a safety area on a printable medium and performing a maintenance task on a printable medium.
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公开(公告)号：US11642881B2
公开(公告)日：2023-05-09
申请号：US17311460
申请日：2019-01-30
CPC分类号： B41J2/0451 , B41J2/16579 , B41J2/2139 , B41J2/2142
摘要： Examples relate to a method to print a print job. The method comprise comparing an operational parameter of the print job with a reference operational parameter and determining to perform a maintenance task during the print job based on at least a result of comparing the operational parameter with the reference operational parameter. If the maintenance task is to be performed, the method further comprises determining a safety area on a printable medium and performing a maintenance task on a printable medium.
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公开(公告)号：US11052691B2
公开(公告)日：2021-07-06
申请号：US16958849
申请日：2018-01-08
IPC分类号： B41J2/045 , B41J29/393 , B41J2/21
摘要： 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.
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公开(公告)号：US20220324226A1
公开(公告)日：2022-10-13
申请号：US17228915
申请日：2021-04-13
摘要： In one example in accordance with the present disclosure, a method, system, and non-transitory machine-readable storage medium are described. A drop characteristic measurement of a drop of print fluid ejected from a printhead is detected. The drop characteristic measurement includes at least one of a drop velocity and a drop weight. The drop characteristic measurement is compared against a threshold value. When the drop characteristic measurement is beyond the threshold value, a remedial action is triggered.
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公开(公告)号：US20220126571A1
公开(公告)日：2022-04-28
申请号：US17419345
申请日：2019-07-15
摘要： 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：US11999580B2
公开(公告)日：2024-06-04
申请号：US17756012
申请日：2019-12-04
IPC分类号： B65H23/18 , B41J11/00 , B41J15/16 , B65H23/195
CPC分类号： B65H23/1955 , B41J11/002 , B41J15/165
摘要： 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：US11813856B2
公开(公告)日：2023-11-14
申请号：US18068165
申请日：2022-12-19
IPC分类号： B41J15/16 , B41J11/46 , B65H23/198 , B65H23/18 , B65H23/185
CPC分类号： B41J15/16 , B41J11/46 , B65H23/185 , B65H23/198 , B65H23/1806 , B65H2511/22 , B65H2511/23 , B65H2511/512 , B65H2513/11 , B65H2515/31 , B65H2515/84 , B65H2553/40 , B65H2801/15
摘要： An example method comprises operating a drive unit to advance a substrate in a substrate advance direction toward a printing station. At the printing station, a first line is printed onto the substrate. A drive unit is instructed to advance the substrate in the substrate advance direction by a target amount, and a second line is printed onto the substrate. The distance between the first and second lines in a direction perpendicular to the substrate advance direction is calculated and, based on the calculated difference, a tension of the substrate is modified.
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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
CPC分类号： B41J2/04536 , B41J2/0451 , B41J2/2139
摘要： 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
IPC分类号： B41J2/045
摘要： 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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