公开(公告)号：US20230317331A1

公开(公告)日：2023-10-05

申请号：US18191086

申请日：2023-03-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Sukenori ICHIKAWA ,  Akira ARAI ,  Michio NAKAMORI

IPC: H01F1/153 ,  B22F1/16 ,  B22F1/05 ,  B22F9/08 ,  B22F1/08 ,  B22F1/07

CPC classification number: H01F1/15383 ,  B22F1/16 ,  B22F1/05 ,  B22F9/082 ,  H01F1/15308 ,  B22F1/08 ,  B22F1/07 ,  B22F2009/0828 ,  B22F2203/11 ,  B22F2301/35 ,  B22F2302/256

Abstract: A magnetic bead contains: a Fe-based magnetic metal powder; and a coating layer with which a particle surface of the Fe-based magnetic metal powder is coated. The Fe-based magnetic metal powder contains a crystal grain having a grain diameter of 1 nm or more and 60 nm or less in a ratio of 30% by volume or more and 100% by volume or less. In addition, the coating layer may contain an oxide and has an average thickness of 10 nm or more and 200 nm or less.

公开(公告)号：US20230260683A1

公开(公告)日：2023-08-17

申请号：US18109300

申请日：2023-02-14

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira ARAI

IPC: H01F1/047 ,  B22F1/05 ,  B22F9/08 ,  B22F1/16 ,  B22F1/107

CPC classification number: H01F1/047 ,  B22F1/05 ,  B22F9/082 ,  B22F1/16 ,  B22F1/107 ,  B22F2301/35 ,  B22F2302/256 ,  B22F2998/10 ,  B22F2999/00 ,  B22F1/08

Abstract: Magnetic beads include: a magnetic metal powder; and a coating layer covering a surface of the magnetic metal powder. t/D50, which is a ratio of a thickness t of the coating layer to the magnetic beads diameter D50, is from 0.0001 to 0.05, and a Vickers hardness of the magnetic metal powder is 100 or more.

公开(公告)号：US20190062996A1

公开(公告)日：2019-02-28

申请号：US16117538

申请日：2018-08-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Kaneo YODA ,  Yoshiyuki NAGAI ,  Yuki OGUCHI ,  Shigeo FUJITA ,  Akira ARAI ,  Kazuhiro ICHIKAWA ,  Teruaki OGUCHI ,  Seiichi TANIGUCHI

IPC: D21F9/04 ,  D21F7/00 ,  D21F11/06 ,  D21H21/06

Abstract: Provided is technology improving the efficiency (productivity) of a sheet manufacturing apparatus. A sheet manufacturing apparatus 100 manufactures sheets S by heating with heaters 81 and 82 a mixture (second web W2) of resin and fiber produced by defibrating feedstock MA. The heaters 81 and 82 each have a first roller 171, a second roller 172 that holds the second web W2 with the first roller 171, and a moving mechanism 190. The moving mechanism 190 can switch the first roller 171 and second roller 172 to a position holding the second web W2, and a first roller 171 and second roller 172 are separated and do not hold the second web W2. The heaters 81 and 82 are configured as units that can removably installed to the sheet manufacturing apparatus 100.

公开(公告)号：US20240399298A1

公开(公告)日：2024-12-05

申请号：US18675215

申请日：2024-05-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira ARAI

IPC: B01D53/22 ,  B01D69/02 ,  B01D71/70

Abstract: A gas separation membrane for separating carbon dioxide from a mixed gas containing the carbon dioxide and a non-target component includes: a porous layer; and a separation layer formed of a polymer material and in close contact with one surface of the porous layer. t is 5 nm or more and 500 nm or less, a ratio d/t is more than 2.0 and 100 or less, and a ratio T/t is 100 or more and 10000 or less, where t is an average thickness of the separation layer, d is an average hole diameter of the porous layer, and T is an average thickness of the porous layer.

公开(公告)号：US20230078743A1

公开(公告)日：2023-03-16

申请号：US17895257

申请日：2022-08-25

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira ARAI

IPC: H01F1/26

Abstract: An insulating material-coated soft magnetic powder includes: an Fe-based alloy soft magnetic powder; and an insulating film with which a particle surface of the Fe-based alloy soft magnetic powder is coated. D50 is 0.1 μm or more and 3.0 μm or less where D50 is a particle diameter of the Fe-based alloy soft magnetic powder at which a cumulative frequency is 50% in a volume-based particle size distribution, and a ratio of D90/D50 is 2.00 or less where D90 is a particle diameter of the Fe-based alloy soft magnetic powder at which the cumulative frequency is 90% in the volume-based particle size distribution.

公开(公告)号：US20240145138A1

公开(公告)日：2024-05-02

申请号：US18494821

申请日：2023-10-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira ARAI

IPC: H01F1/147 ,  B22F1/142 ,  B22F1/16

CPC classification number: H01F1/14766 ,  B22F1/142 ,  B22F1/16 ,  B22F2301/35 ,  B22F2302/256 ,  B22F2304/10

Abstract: A magnetic bead includes: a magnetic metal powder and a coating layer with which a surface of the magnetic metal powder is coated. D50, which is a 50% particle diameter on a volume basis in a particle size distribution, is 0.5 μm to 10 μm, a density is 5.0 g/cc to 7.5 g/cc, and a coercive force is 800 A/m or less.

公开(公告)号：US20210324555A1

公开(公告)日：2021-10-21

申请号：US16497500

申请日：2018-03-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Kaneo YODA ,  Yoshiyuki NAGAI ,  Yuki OGUCHI ,  Shigeo FUJITA ,  Akira ARAI ,  Kazuhiro ICHIKAWA ,  Teruaki OGUCHI ,  Seiichi TANIGUCHI

IPC: D04H1/60 ,  D04H1/732 ,  D04H1/736 ,  D21B1/06

Abstract: A sheet manufacturing apparatus includes a defibrating portion that defibrates a raw material, a mixing portion that mixes a defibrated material defibrated by the defibrating portion, a heating portion that heats a mixture mixed by the mixing portion, and a control portion that controls a temperature of the heating portion, in which the control portion sets a heating temperature of the heating portion to a temperature depending on a type of the raw material defibrated by the defibrating portion.

公开(公告)号：US20210087727A1

公开(公告)日：2021-03-25

申请号：US17024751

申请日：2020-09-18

Applicant: SEIKO EPSON CORPORATION

Inventor： Satomi YOSHIOKA ,  Tsukasa OTA ,  Hidehiro TAKANO ,  Kazuhiro ICHIKAWA ,  Akira ARAI ,  Satoru YANAGI

IPC: D04H1/74

Abstract: Provided is a fiber structure including: cellulose fiber disposed such that a main fiber orientation direction is a first direction; and a crosslinking material that binds a plurality of the cellulose fibers to each other, in which the first direction forms an angle of equal to or less than 45 degrees with respect to a direction of an external force applied from an outside to a bottom surface.

公开(公告)号：US20200011009A1

公开(公告)日：2020-01-09

申请号：US16491592

申请日：2018-01-30

Applicant: SEIKO EPSON CORPORATION

Inventor： Akira ARAI ,  Kaneo YODA ,  Shunichi SEKI ,  Yoshihiro UENO ,  Kazuhiro ICHIKAWA ,  Shinichi KATO ,  Hidehiro TAKANO

IPC: D21B1/06 ,  B27N3/04 ,  D04H1/60 ,  D04H1/732

Abstract: A sheet is configured to have a first complex having a fiber and a fiber aggregation inhibitor integrally, a second complex having a fiber and a fiber aggregation inhibitor integrally, and a binding material which combines the first complex and the second complex and contains a resin.