公开(公告)号：US20220032660A1

公开(公告)日：2022-02-03

申请号：US17388155

申请日：2021-07-29

Applicant: Seiko Epson Corporation

Inventor： Toshiyuki YODA ,  Midori SEKINE ,  Yuko HISHIDA ,  Kyohei TANAKA

IPC: B41J11/00 ,  C09D11/30

Abstract: An ink jet method records a radiation-curable ink composition containing a polymerizable compound. The radiation-curable ink composition includes a first ink composition and a second ink composition. The ink jet method includes a first discharging step of discharging the first ink composition with an ink jet head to adhere the composition to a recording medium, a first curing step of irradiating the first ink composition adhered to the recording medium with radioactive rays, a cooling step of cooling the recording medium, a second discharging step of discharging the second ink composition with the ink jet head to adhere the composition to the cooled recording medium at least in a part of the region where the first ink composition adhered; and a second curing step of irradiating the second ink composition adhered to the recording medium with radioactive rays.

公开(公告)号：US20240076512A1

公开(公告)日：2024-03-07

申请号：US18456729

申请日：2023-08-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Sena GOZU ,  Yuko HISHIDA ,  Kenta UCHIDA

IPC: C09D11/322 ,  C09D11/38

CPC classification number: C09D11/322 ,  C09D11/38

Abstract: A water-based ink jet ink composition contains C.I. Pigment Red 150 and at least one of 1-(2-hydroxyethyl)-2-pyrrolidone and ε-caprolactam.

公开(公告)号：US20240075743A1

公开(公告)日：2024-03-07

申请号：US18458578

申请日：2023-08-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Miki UCHIDA ,  Yusuke MIZUTAKI ,  Yuko HISHIDA ,  Hiromichi TAKANASHI ,  Tomohiro KAWASAKI

IPC: B41J2/165 ,  C09D11/322

CPC classification number: B41J2/16552 ,  C09D11/322 ,  B41J2002/16558

Abstract: A water-based maintenance liquid is used for a recording apparatus, the recording apparatus is an apparatus to perform recording by ejecting at least two types of water-based ink compositions from an ink jet head, the ink jet head has a nozzle surface in which nozzles to eject the water-based ink compositions are formed, the nozzles are formed in the nozzle surface respectively for the at least two types of water-based ink compositions, the maintenance liquid is used to moisturize the nozzle surface by being supplied to a cap portion which covers the nozzle surface and includes water and a moisturizing agent component which contains at least one type of moisturizing agent, the moisturizing agent component is a water-soluble organic compound, and a content A (percent by mass) of the moisturizing agent component with respect to a total mass of the moisturizing agent component and the water satisfies a predetermined equation.

公开(公告)号：US20240066874A1

公开(公告)日：2024-02-29

申请号：US18456697

申请日：2023-08-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuko HISHIDA ,  Miki UCHIDA ,  Yusuke MIZUTAKI ,  Hiromichi TAKANASHI ,  Tomohiro KAWASAKI

IPC: B41J2/165 ,  C09D11/322 ,  C11D3/00 ,  C11D3/20 ,  C11D3/43

CPC classification number: B41J2/16552 ,  B41J2/16535 ,  C09D11/322 ,  C11D3/0047 ,  C11D3/2082 ,  C11D3/43 ,  B41J2002/16558

Abstract: A maintenance liquid is used to maintain an ink jet head of a printing apparatus configured to eject an ink for printing from the ink jet head. The maintenance liquid is aqueous and subject to detection by a conductivity-based sensor. The maintenance liquid includes at least one selected from the group consisting of inorganic alkalis and ethylenediaminetetraacetic acid compounds and at least one selected from the group consisting of organic acids and organic alkalis. The maintenance liquid has an electrical conductivity of 100 μS/cm or more and a pH of 6.0 to 11.

公开(公告)号：US20230294405A1

公开(公告)日：2023-09-21

申请号：US18183409

申请日：2023-03-14

Applicant: SEIKO EPSON CORPORATION

Inventor： Yuko HISHIDA ,  Yusuke MIZUTAKI ,  Miki UCHIDA

IPC: B41J2/155 ,  B41J2/21

CPC classification number: B41J2/155 ,  B41J2/2107 ,  B41J2002/14467

Abstract: A recording method comprises a discharging step of discharging a first ink and a second ink from a line head having a length equal to or longer than a recording width of a recording medium and allowing the inks to adhere to the recording medium, wherein the line head includes a plurality of unit heads aligned in the recording width direction of the recording medium and includes portions having different inter-nozzle distances in the scanning direction of a first nozzle that discharges the first ink and a second nozzle that discharges the second ink, and the first ink and the second ink contain color materials and inorganic oxide particles, and the color materials have compositions different from each other.

公开(公告)号：US20240158654A1

公开(公告)日：2024-05-16

申请号：US18497011

申请日：2023-10-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Miki UCHIDA ,  Yusuke MIZUTAKI ,  Yuko HISHIDA

IPC: C09D11/322 ,  C09D11/38

CPC classification number: C09D11/322 ,  C09D11/38

Abstract: An aqueous ink jet ink composition includes a coloring material, a water-soluble urethane resin, and an acetylene glycol-based surfactant having a HLB value of 6 or less. The content A of the acetylene glycol-based surfactant relative to the total mass of the ink jet ink composition is 0.1% by mass or more, and the ratio (A/U) of the content A of the acetylene glycol-based surfactant to the content U of the water-soluble urethane resin is from 0.3 to 2.3.

公开(公告)号：US20220064467A1

公开(公告)日：2022-03-03

申请号：US17458826

申请日：2021-08-27

Applicant: Seiko Epson Corporation

Inventor： Kyohei TANAKA ,  Yuko HISHIDA ,  Midori SEKINE

IPC: C09D11/40 ,  C09D11/107 ,  C09D11/037 ,  C09D11/101 ,  C09D11/322 ,  B41J2/21 ,  B41J11/00 ,  B41M5/00

Abstract: An ink set of a radiation-curable ink jet composition containing a polymerizable compound, wherein the ink set includes a color ink and a clear ink as the radiation-curable ink jet composition, the polymerizable compound contained in the clear ink contains at least one of Polymerizable monomer A1 and Polymerizable oligomer A2, Polymerizable monomer A1 having a volume of 0.26 nm3 or more and an area in the direction of the height relative to a long side of 0.25 nm2 or more that are defined by using the van-der-Waals radius, and a total content of Polymerizable monomer A1 and Polymerizable oligomer A2 contained in the clear ink is 80% by mass or more relative to a total amount of the polymerizable compound.

公开(公告)号：US20210071024A1

公开(公告)日：2021-03-11

申请号：US17012171

申请日：2020-09-04

Applicant: Seiko Epson Corporation

Inventor： Kyohei TANAKA ,  Keitaro NAKANO ,  Midori SEKINE ,  Yuko HISHIDA

IPC: C09D11/40 ,  C09D11/101 ,  C09D11/104

Abstract: An ink set of radiation curable ink jet inks each of which contains polymerizable compounds, includes a color ink and a clear ink, the polymerizable compounds contained in the clear ink include a monomer A having a hydroxy group and a monomer B having a volume of 0.26 nm3 or more and a height direction area of 0.25 nm2 or more with respect to a long side each of which is defined by the Van der Waals radii, and a total content of the monomer A and the monomer B is 80 percent by mass or more with respect to a total mass of the polymerizable compounds contained in the clear ink.

公开(公告)号：US20210024761A1

公开(公告)日：2021-01-28

申请号：US16937817

申请日：2020-07-24

Applicant: Seiko Epson Corporation

Inventor： Kyohei TANAKA ,  Midori SEKINE ,  Keitaro NAKANO ,  Yuko HISHIDA ,  Tsuyoshi SANO

IPC: C09D11/101 ,  C09D11/54 ,  C09D11/40 ,  C09D11/322 ,  C09D11/107 ,  C09D11/037 ,  B41M5/00 ,  B41J11/00

Abstract: Provided is an ink set of radiation-curable ink jet compositions each including a polymerizable compound component. The ink set includes a color ink and a clear ink as the radiation-curable ink jet compositions. The polymerizable compound component contained in the clear ink includes a monomer A having a volume of 260 angstrom3 or more and an area of 25 angstrom2 or more in the height direction with respect to a long side defined by a van-der-Waals radius, and the content of the monomer A contained in the clear ink is 80 mass % or more based on the total amount of the polymerizable compound component.