Invention Grant
- Patent Title: Magnetic carrier, two-component developer, and replenishment developer
-
Application No.: US17582691Application Date: 2022-01-24
-
Publication No.: US12222678B2Publication Date: 2025-02-11
- Inventor: Ryuji Murayama , Yuto Onozaki , Nobuhiro Yoshida , Hironori Minagawa
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: CANON U.S.A., INC. IP DIVISION
- Priority: JP2021-012504 20210128,JP2021-213008 20211227
- Main IPC: G03G9/113
- IPC: G03G9/113 ; G03G9/107

Abstract:
A magnetic carrier includes a magnetic core and a coating resin that covers a surface of the magnetic core. The coating resin includes a resin A and a resin B. A content of the resin A is 1 to 50% by mass, and a content of the resin B is 50 to 99% by mass, with respect to the coating resin. The resin A has a particular unit Y1 and a particular unit Y2, and the resin B contains 0.1% by mass or less of the particular unit Y2. When a mass of the resin A is represented by X, a mass of the unit Y1 is represented by Ma, and a mass of the unit Y2 is represented by Mb, 0.90≤(Ma+Mb)/X≤1.00 and 1.00≤Ma/Mb≤30.0 are satisfied, and also 0≤|SPa−SPb|≤2.0 is satisfied.
Public/Granted literature
- US20220236658A1 MAGNETIC CARRIER, TWO-COMPONENT DEVELOPER, AND REPLENISHMENT DEVELOPER Public/Granted day:2022-07-28
Information query