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公开(公告)号：US20240123729A1
公开(公告)日：2024-04-18
申请号：US18277687
申请日：2022-02-04
申请人： Scrona AG
摘要： An electrohydrodynamic inkjet printing system includes a print head with a plurality of ink nozzles arranged in recesses on the print head. A plurality of ejection electrodes located at the ink nozzles. A support structure is arranged in front of the ink nozzles and forming a front surface, wherein the ejection electrodes are arranged on the support structure. Gas from a first gas source and/or from a second gas source is conveyed through gas ducts and or gas is fed through the gas ducts to a gas sink. The gas ducts extend, over at least part of their length, along the support structure.
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公开(公告)号：US20240059064A1
公开(公告)日：2024-02-22
申请号：US18272309
申请日：2021-01-14
申请人： Scrona AG
IPC分类号： B41J2/14
CPC分类号： B41J2/1433
摘要： The electrohydrodynamic print head comprises a nozzle carrier with a plurality of nozzles arranged thereon. A plurality of electrodes associated with the nozzles are located on the front side of the nozzles. A support structure supporting the electrodes is located on the nozzle carrier and comprises a plurality of support elements arranged between the nozzles. Ink retainers are arranged between the nozzles and the support elements. The front surfaces of the ink retainers are located behind the front ends of the nozzles in order to prevent the nozzles from being submerged by ink. Guard electrodes can be provided between the ejection electrodes and the ink retainers to reduce the electrical fields at the ink retainers and thereby to improve their efficiency to pin the ink. Suction ducts surrounding each nozzle allow to remove ink from the nozzles.
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公开(公告)号：US20240173973A1
公开(公告)日：2024-05-30
申请号：US18277692
申请日：2021-02-18
申请人： Scrona AG
CPC分类号： B41J2/06 , B41J2/18 , B41J11/0022 , B41J2202/02 , B41J2202/12 , B41J2202/18
摘要： An inkjet printing system includes a print head with a plurality of ink nozzles arranged in recesses on the print head. Gas from a first gas source is conveyed through first gas ducts and fed to the recesses. An evaporator is arranged along the first gas ducts before the nozzles, saturating the gas with solvent, which prevents undesired evaporation of ink at the ink nozzles. The printing system further includes second gas ducts feeding dry gas to the region between the print head and the target as well as third gas ducts for carrying off gas from the first and second air ducts.
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