(19)

(11)

EP 4 816 172 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24809424.5 (22) Date of filing: 30.10.2024

(51) International Patent Classification (IPC):  B41J 2/04(2006.01) C09D 11/00(2014.01) B41J 2/16(2006.01) (52) Cooperative Patent Classification (CPC): B41J 2202/05; B41J 2/04; B41J 2/1606; C09D 11/322 (86) International application number: PCT/IB2024/060663 (87) International publication number: WO 2025/114787 (05.06.2025 Gazette 2025/23)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 30.11.2023 JP 2023203108 (71) Applicant: Ricoh Company, Ltd. Tokyo 143-8555 (JP)	(72) Inventors: HANAZAWA, Atsufumi Tokyo 143-8555 (JP) INOUE, Tomohiro Tokyo 143-8555 (JP) NAMBA, Michihiko Tokyo 143-8555 (JP) TAMAI, Takashi Tokyo 143-8555 (JP) HABASHI, Hisashi Tokyo 143-8555 (JP) YOSHINUMA, Toshihiro Tokyo 143-8555 (JP) KUNIOKA, Satoshi Tokyo 143-8555 (JP) (74) Representative: Marks & Clerk LLP  15 Fetter Lane London EC4A 1BW London EC4A 1BW (GB)