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公开(公告)号：WO2023003557A1
公开(公告)日：2023-01-26
申请号：PCT/US2021/042808
申请日：2021-07-22
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： PORTNOY, Vitaly , KELLA, Dror , ASSENHEIMER, Michel , KFIR, Yuval
Abstract: In one example, a printing process includes gathering a first group of individual color separations for an image sequentially on an intermediate transfer roller, transferring the first group from the intermediate transfer roller to a printable substrate, gathering a second group of individual color separations for the image sequentially on the intermediate transfer roller, and transferring the second group from the intermediate transfer roller to the substrate.
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公开(公告)号：WO2022055487A1
公开(公告)日：2022-03-17
申请号：PCT/US2020/050155
申请日：2020-09-10
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： WAIDMAN, Ran , GUTTMAN, Nir , NEGREANU, Eyal
IPC: G03G15/10
Abstract: Examples include a method for operating a liquid toner electrophotography printer. The method comprises monitoring an optical density of images printed by the printer, storing a first cumulative optical density change value induced by developer voltage changes, and storing a second cumulative optical density change value induced by electrode voltage changes. The method also comprises detecting that the monitored optical density deviates from an operational optical density profile. The method also comprises, in response to the deviation of the monitored optical density, comparing the first cumulative stored cumulative optical density change value to the second cumulative optical density change value; and changing either a developer voltage or an electrode voltage to maintain an optical density change differential between the first cumulative optical density change value and the second cumulative optical density change value within an operational optical density change differential profile.
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公开(公告)号：WO2021126236A1
公开(公告)日：2021-06-24
申请号：PCT/US2019/067800
申请日：2019-12-20
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： COHEN, Lavi , ALFO, Elad , NAKASH, Shimi , HARTSTEIN, Yonni
IPC: G03G15/10
Abstract: A positioning device to control the position of a print agent applicator comprises a mount to support a print agent applicator at a load point on the mount; an actuator coupled to the mount to apply a driving force at an actuation point on the mount; and a guide mechanism to guide the mount and supported print agent applicator, under the driving force, to translate along a predetermined path towards a printing drum to form an engaging contact between the print agent applicator and the printing drum.
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公开(公告)号：WO2021066838A1
公开(公告)日：2021-04-08
申请号：PCT/US2019/054705
申请日：2019-10-04
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： IRVINE, Jennifer, R. , BERG, Mark, H.
Abstract: In some examples, an apparatus can include a print material cartridge, a reciprocating pump, a first valve, where the first valve is a one-way valve, and a second valve, where the second valve is a float valve, where the reciprocating pump is to cause print material to be supplied to the print material cartridge via the second valve.
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公开(公告)号：WO2021021146A1
公开(公告)日：2021-02-04
申请号：PCT/US2019/044282
申请日：2019-07-31
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： CHERTOV, Igor , SCHLUMM, Doron , TRIFONOV, Sergei
Abstract: In an example of the disclosure, carrier liquid is supplied to a container with a set of walls defined at least partially by a surface of an electrode. The carrier liquid is caused to move through a container via a carrier liquid flow path to sequentially encounter a set of accumulation elements. Each accumulation element is situated between adjacent walls. A voltage is applied to the electrode to generate an electric field between the electrode surface and the set of accumulation elements. The electric field causes contaminant from the carrier liquid to adhere to the set of accumulation elements.
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Patent Agency Ranking
公开(公告)号：WO2020242498A1
公开(公告)日：2020-12-03
申请号：PCT/US2019/034983
申请日：2019-05-31
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： AMBAR, Oron , ERLICH, Zvi , VLADOMIRSKI, Haim , JODRA BARRON, Rodolfo
Abstract: A light source adjustment apparatus is disclosed. The light source adjustment apparatus includes processing apparatus to receive a scanned image of a pattern printed by a print apparatus onto a printable medium, the pattern including a plurality of blocks of print agent of a first colour printed during a printing operation in which light sources of a light source array irradiate a photoconductive surface; analyse the scanned image to identify a region of non-uniformity within the plurality of blocks of print agent; correlate a location of the identified region of non-uniformity with a corresponding light source in the light source array; determine, based on the identified region of non-uniformity, an adjustment to be made to a parameter of the corresponding light source; and generate a signal to effect the determined parameter adjustment with regard to the corresponding light source. A method and a print apparatus are also disclosed.
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公开(公告)号：WO2020204926A1
公开(公告)日：2020-10-08
申请号：PCT/US2019/025729
申请日：2019-04-04
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： ARBEL, Amir , HAIK, Oren , ELUK, Tal , NIR, Jonathan
IPC: G03G15/10 , G01M13/023 , G01L5/04
Abstract: A method of determining a state of a belt of a print apparatus is disclosed. The method includes: receiving, using a processor, a measurement of a parameter associated with the belt; providing, using a processor, the measured parameter as an input to a trained classifier; and obtaining, using a processor, as an output of the trained classifier an indication of a state of the belt. An apparatus and a method of training a predictive model are also disclosed.
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公开(公告)号：WO2020204115A1
公开(公告)日：2020-10-08
申请号：PCT/JP2020/015125
申请日：2020-03-26
Applicant: キヤノン株式会社
Abstract: 記録材を搬送する搬送ベルトと、前記搬送ベルトの記録材を搬送する領域に設けられ、記録材を前記搬送ベルトに吸引するための複数の通気口と、記録材を搬送ベルトに向けて吸引するためのファンと、前記搬送ベルトで搬送された記録材上の画像を輻射熱で加熱する加熱源と、を有し、以下を満たす液体現像剤からなる画像を記録材に定着する定着装置。 ｄ ｂ ・Φ ｂ ・Ｋ＜４４．９ Ｋ：ρ ｂ ・ｃ ｂ ／λ ｐ ・ρ ｐ・ ｄ ｐ・ ｃ ｐ ｃ ｐ ：現像剤と記録材の比熱（Ｊ／ｇ・Ｋ） ρ ｐ ：現像剤と記録材の密度（ｇ／ｃｍ ３ ） ｄ ｐ ：現像剤と記録材の膜厚さ（ｍｍ） λ ｐ ：現像剤と記録材の熱伝導率（Ｗ／（ｍ・Ｋ）） ｃ ｂ ：ベルトの比熱（Ｊ／ｇ・Ｋ） ρ ｂ ：ベルトの密度（ｇ／ｃｍ ３ ） ｄ ｂ ：ベルトの膜厚（ｍｍ） Φ ｂ ：ベルトの通気口の径（ｍｍ）
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公开(公告)号：WO2020197536A1
公开(公告)日：2020-10-01
申请号：PCT/US2019/023576
申请日：2019-03-22
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： EYAL, Ehud , SHALEM, Nadav
IPC: G03G15/10 , G03G15/20 , C09D11/101
Abstract: A method is disclosed. The method may comprise applying a coating of electrically charged fluid print agent to a developer surface, the fluid print agent comprising particles of thermoplastic resin in a carrier fluid. The method may further comprise controlling migration of fluid print agent from the developer surface to form an image from fluid print agent on a first surface. The method may further comprise irradiating the print agent on the first surface with ultraviolet radiation to heat the print agent to a temperature of at least 70°C to melt the thermoplastic resin. A print system and a heating unit are also disclosed.
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公开(公告)号：WO2020197535A1
公开(公告)日：2020-10-01
申请号：PCT/US2019/023573
申请日：2019-03-22
Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Inventor： ORLIK, Fernanda , TEISHEV, Albert , VEIS, Alex
IPC: G03G15/10 , G03G15/20 , C09D11/101
Abstract: A method is disclosed. The method may comprise forming an image on a surface by controlled electrostatic transfer of a fluid print agent comprising thermoplastic resin disposed in a carrier fluid. The method may also comprise heating the fluid print agent on the surface to remove the carrier fluid and to melt the thermoplastic resin and allowing the melted thermoplastic resin in continuous areas on the surface to fuse together to form an image from fused print agent. The method may further involve providing a printed substrate bearing the image formed from fused print agent. The method may further comprise irradiating the printed substrate with an ultraviolet narrowband source so as to cause heating of the fused print agent to melt the thermoplastic resin. A print system and a print apparatus are also disclosed.
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