The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 03, 2026
Filed:
Sep. 28, 2021
Applicant:
Tokin Corporation, Shiroishi, JP;
Inventors:
Assignee:
TOKIN CORPORATION, Shiroishi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 41/02 (2006.01); H01F 1/153 (2006.01); H01F 1/24 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0246 (2013.01); H01F 1/153 (2013.01); H01F 1/24 (2013.01);
Abstract
A dust core is manufactured by compacting magnetic particles in a metal die while heating the magnetic particles at a predetermined temperature in the metal die. At least some of the magnetic particles are coated with coating material. The metal die comprises a die, an upper punch and a lower punch. The upper punch is positioned above the lower punch in an up-down direction. The metal die is provided with a low-temperature portion and a high-temperature portion. A temperature of the low-temperature portion is less than a temperature of the high-temperature portion by 10° C. or more.