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:
Jan. 26, 2021
Filed:
Nov. 19, 2019
Sayuri Kojima, Kanagawa, JP;
Takashi Tamai, Kanagawa, JP;
Atsufumi Hanazawa, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming method includes applying a processing fluid to a recording medium, applying an ink to the recording medium onto which the processing fluid has been applied, and heating the recording medium onto which the ink has been applied, wherein the ink comprises a black ink and at least one color ink other than the black ink, wherein the following relationship is satisfied: |γ(k)-γ(c)|≤5 mN/m, where γ(k) represents a dynamic surface tension of the black ink at a surface lifetime of 15 ms and γ(c) represents a dynamic surface tension of the at least one color ink at a surface lifetime of 15 ms, wherein the ink discharged from an extreme downstream nozzle in a direction of recording medium conveyance is heated at 1.5 seconds or less after the ink is attached to the recording medium.