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公开(公告)号：US20150109367A1
公开(公告)日：2015-04-23
申请号：US14057932
申请日：2013-10-18
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Francesc Ros Cerro , Macia Sole Pons , David Ramirez Muela , Li Qian
IPC: B41J2/165
CPC classification number: B41J2/19 , B41J2/16526 , B41J2/1707 , B41J2/17513 , B41J2/17556 , B41J2002/17516
Abstract: A print head priming system comprises a vent closure section to close a vent, where the vent is to compensate backpressure in a print head. An inlet to receive pressurized gas from a source of pressurised gas is to provide the pressurized gas to the print head. A pressure relief valve is to open in response to pressure in the print head reaching or exceeding a predetermined value by the provision of gas to the print head by the source of pressurised gas.
Abstract translation: 打印头起动系统包括用于关闭通气口的通风口闭合部分，其中通风口用于补偿打印头中的背压。 从加压气体源接收加压气体的入口是将加压气体提供给打印头。 通过由加压气体源向打印头提供气体，压力释放阀将响应于打印头中的压力而达到或超过预定值而打开。
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公开(公告)号：US11660858B2
公开(公告)日：2023-05-30
申请号：US17050908
申请日：2018-06-21
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Li Qian , Secundino Vicente Vicente , Marc Bautista Palacios
IPC: B41J2/045
CPC classification number: B41J2/04508 , B41J2/04586
Abstract: In an example, there is provided a method and apparatus for controlling spit on page operation, the method comprising receiving at least one image to be printed, for each row of a plurality of rows of the image: identifying two or more pixels of the row of the image to be printed by a nozzle of a printhead, determining if a spacing between two consecutive pixels of the two or more pixels is greater than a threshold distance, and in response to a determination that the spacing between the two consecutive pixels is greater than the threshold distance, providing an indication that spit on page dots should be provided when printing the image.
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公开(公告)号：US20230145554A1
公开(公告)日：2023-05-11
申请号：US17754504
申请日：2019-10-21
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Li Qian , Alberto Borrego Lebrato , David Munoz Navarro
CPC classification number: G01N15/088 , G06T7/001
Abstract: Example implementations relate to substrate porosity determination. Some examples refer to a substrate porosity determination comprising an image capture device a controller to obtain a reference image by the image capture device; obtain a measurement image after a printing operation has been performed on a substrate located over the image capture device; compare the reference image and the measurement image—determine whether the substrate is porous based on the comparison; and determine a print parameter based on the determination of whether the substrate is porous.
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公开(公告)号：US11446926B2
公开(公告)日：2022-09-20
申请号：US17261052
申请日：2018-12-03
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Li Qian , Jamie Juan Munoz , David Munoz Navarro
IPC: B41J2/045
Abstract: A printing apparatus is disclosed. The printing apparatus comprises a printhead and a controller. The printhead is to spit a printing fluid comprising a first mode and a second mode. The first mode corresponds to using a first energy level to spit the printing fluid and the second mode corresponds to using a second energy level to spit the printing fluid. The second energy level comprises a higher energy level than the first energy level. The controller is to determine a decap risk zone associated with the printing fluid, determine in view of the decap risk zone a decap location, and instruct the printhead to spit using the second mode at the decap location.
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公开(公告)号：US11305542B2
公开(公告)日：2022-04-19
申请号：US16498641
申请日：2018-05-15
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Li Qian , Francisco Guerrero Carvajal
IPC: B41J2/165
Abstract: A method comprising: soaking a portion of a web in a printing device with printing liquid from a first print head (110) of the printing device; and wiping at least one nozzle of a second print head (120) in the printing device with the soaked portion of the web. The method provides a servicing method for print heads in the printing device.
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Patent Agency Ranking
公开(公告)号：US11220108B2
公开(公告)日：2022-01-11
申请号：US17050469
申请日：2018-06-19
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Li Qian , Eduardo Amela Conesa , Marian Dinares Argemi
IPC: B41J2/165
Abstract: An example of a printing apparatus comprising a scanning printhead and a controller is disclosed. The scanning printhead comprises a plurality of nozzles to print using a mask comprising a ramp area and non-ramp area. A first subset of nozzles of the plurality of nozzles is assigned to the ramp area and the second subset of nozzles of the plurality of nozzles is assigned to the non-ramp area. The controller is to calculate a number of spits of a nozzle from the second subset of nozzles for a pass. The controller is also to calculate a number of spits of a nozzle from the first subset of nozzles for the pass based on the number of spits of the nozzle from the second subset of nozzles. The controller is further to instruct the nozzle from the first subset of nozzles to eject online an amount of a composition on a service zone based on the number of spits of the first subset of nozzles.
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公开(公告)号：US20210402800A1
公开(公告)日：2021-12-30
申请号：US17258505
申请日：2019-03-11
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Li Qian , Xavier Domingo Reguant , Secundlno Vicente Vicente
Abstract: A print apparatus is disclosed. In some examples, the print apparatus comprises a print head to deposit print agent onto a substrate; a detector to detect a fiducial; a first light source to back-illuminate the substrate, such that light from the first light source is to be detected by the detector through the substrate; and processing apparatus. The processing apparatus is to operate the print head to deposit print agent to form a first fiducial on a first side of the substrate, the first fiducial comprising a shape of a first colour and having a first dimension, and a background of print agent of a second, different colour, wherein the first dimension of the shape does not exceed a corresponding dimension of the background; operate the print head to deposit print agent to form a second fiducial on a second, opposite side of the substrate, the second fiducial comprising an inverted version of the shape of the first colour; operate the first light source to back-illuminate the substrate; operate the detector to detect the first and second fiducials; and determine whether the first fiducial is aligned with the second fiducial. A method and a machine-readable medium are also disclosed.
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公开(公告)号：US20210365217A1
公开(公告)日：2021-11-25
申请号：US16603560
申请日：2018-06-15
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： Li Qian , Francisco Guerrero Carvajal , Secundino Vicente Vicente
Abstract: In an example, there is provided a method and apparatus for generating a print output file, the method comprising receiving at least one image to be printed, determining a printing area corresponding to a region containing the at least one image to be printed and a non-printing area corresponding to a remaining region, providing a spit-on-page dot pattern limited to the non-printing area, and generating the print output file comprising the dot pattern and the at least one image.
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公开(公告)号：US20210191670A1
公开(公告)日：2021-06-24
申请号：US16074405
申请日：2016-05-16
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Xavier Domingo , Li Qian , Secundino Vicente Vicente
IPC: G06F3/12
Abstract: Examples herein provide a method, which includes printing an image and fiducial marks on a first side of a print medium. The fiducial marks include first marks ahead of the image, wherein two of the first marks are end marks at a first distance from respective opposite edges of the print medium, and each first mark has a first length and is located at a second distance from a beginning edge of the image. The fiducial marks also include second marks along a length of the print medium, wherein each second mark is at the first distance from the respective opposite edges, has a second length smaller than the first length, and is at a third distance from another second mark. The method includes scanning the fiducial marks and printing a registered mirrored copy of the image on the second side of the print medium using the scanned fiducial marks.
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公开(公告)号：US20210146688A1
公开(公告)日：2021-05-20
申请号：US17050469
申请日：2018-06-19
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Li Qian , Eduardo Amela Conesa , Marian Dinares Argemi
IPC: B41J2/165
Abstract: An example of a printing apparatus comprising a scanning printhead and a controller is disclosed. The scanning printhead comprises a plurality of nozzles to print using a mask comprising a ramp area and non-ramp area. A first subset of nozzles of the plurality of nozzles is assigned to the ramp area and the second subset of nozzles of the plurality of nozzles is assigned to the non-ramp area. The controller is to calculate a number of spits of a nozzle from the second subset of nozzles for a pass. The controller is also to calculate a number of spits of a nozzle from the first subset of nozzles for the pass based on the number of spits of the nozzle from the second subset of nozzles. The controller is further to instruct the nozzle from the first subset of nozzles to eject online an amount of a composition on a service zone based on the number of spits of the first subset of nozzles.
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