公开(公告)号：US11498340B2

公开(公告)日：2022-11-15

申请号：US16973236

申请日：2019-05-23

申请人： RICOH COMPANY, LTD.

发明人： Hiroaki Takahashi ,  Mio Akima ,  Kiminori Masuda ,  Hiroki Nakane

IPC分类号： B41J2/15 ,  B41J2/21 ,  B41J11/00 ,  B41M7/00

摘要： Provided is an inkjet printing device including an ink storage unit configured to store an ink, an ejection head configured to eject the ink to form a print layer, and a heating unit configured to heat a material to be printed, wherein the ink is an aqueous clear ink including a resin and water, the inkjet printing device has a low gloss printing mode that is a printing mode for imparting low gloss, and a high gloss printing mode that is a printing mode for imparting high gloss, and the heating unit is configured to heat to satisfy the following formula Tmatte>Tgloss, where Tmatte (degrees Celsius) is a temperature of a low gloss printing region of the material to be printed where the low gloss printing region is printed with the low gloss printing mode when the aqueous clear ink is deposited on the material to be printed, and Tgloss (degrees Celsius) is a temperature of a high gloss printing region of the material to be printed where the high gloss printing region is printed with the high gloss printing mode when the aqueous clear ink is deposited on the material to be printed.

公开(公告)号：US10780719B2

公开(公告)日：2020-09-22

申请号：US16412481

申请日：2019-05-15

申请人： Ricoh Company, Ltd.

发明人： Hiroaki Takahashi ,  Kiminori Masuda ,  Mio Akima

IPC分类号： B41J11/00 ,  B41M7/00

摘要： An inkjet printing device includes an ink container accommodating a non-aqueous clear ink containing a resin and an organic solvent, a discharging head to discharge the non-aqueous clear ink directly or indirectly onto a substrate to form printed matter; and a heating device to heat the substrate, wherein the following relationship is satisfied: Tlow (° C.)>Thigh (° C.), where Tlow represents the temperature of the substrate that the heating device is heating during printing in a low gloss printing mode in which the non-aqueous clear ink is directly or indirectly discharged and attached to the substrate to impart low gloss to the printed matter and Thigh represents the temperature of the substrate that the heating device is heating during printing in a high gloss printing mode in which the non-aqueous clear ink is directly or indirectly discharged and attached to the substrate to impart high gloss to the printed matter.

公开(公告)号：US11851569B2

公开(公告)日：2023-12-26

申请号：US17209609

申请日：2021-03-23

申请人： RICOH COMPANY, LTD.

发明人： Tomohiro Hirade ,  Masaki Kudo ,  Mio Akima

IPC分类号： C09D11/037 ,  C09D11/033 ,  C08K3/22 ,  C08K3/36 ,  B41M5/00

CPC分类号： C09D11/037 ,  B41M5/0023 ,  C08K3/22 ,  C08K3/36 ,  C09D11/033 ,  C08K2003/2237

摘要： Provided is an ink including water, an organic solvent, resin particles, a first inorganic pigment, and a second inorganic pigment. The first inorganic pigment comprises particulate titanium oxide. The second inorganic pigment comprises at least one selected from the group consisting of acicular titanium oxide, fusiform titanium oxide, and silica particles.

公开(公告)号：US11345826B2

公开(公告)日：2022-05-31

申请号：US16869103

申请日：2020-05-07

申请人： RICOH COMPANY, LTD.

发明人： Hiroaki Takahashi ,  Kiminori Masuda ,  Mio Akima

IPC分类号： B41J2/21 ,  C09D11/08 ,  C09D11/322 ,  B41J11/00 ,  C09D11/38

摘要： An inkjet printing device includes an ink containing unit to contain a clear aqueous ink containing a resin, a compound represented by the following Chemical formula, and water, where R1 represents an alkyl group having 1 to 4 carbon atoms, a discharging head to discharge the clear aqueous ink to printed matter to form a layer thereon in a low gloss printing mode or high gloss printing mode, and a heating device to heat the printed matter, wherein the heating device heats the printed matter satisfying the following relationship 1: Tlgloss>Thgloss 1, where Tlgloss represents the temperature of the printed matter at a low gloss printing region in the low gloss printing mode and Thgloss represents the temperature of the printed matter in the high gloss printing mode when the clear aqueous ink is attached to the printed matter.

公开(公告)号：US11565528B2

公开(公告)日：2023-01-31

申请号：US17277147

申请日：2019-08-30

申请人： RICOH COMPANY, LTD.

发明人： Mio Akima ,  Hiroaki Takahashi ,  Akiko Bannai

IPC分类号： B41J2/165

摘要： An inkjet printing device including: an ink storage unit configured to store an ink; an ejection head having a nozzle configured to eject the ink to a printing material; a heating unit configured to heat the printing material; and a washing unit configured to wash a nozzle-formed surface of the head with a washing liquid, wherein the ink is a clear ink including a resin, the device has a low gloss printing mode that is a printing mode for applying low gloss and a high gloss printing mode that is a printing mode for applying high gloss, and the inkjet printing device satisfies: Tmatte>Tgloss where Tmatte (degrees Celsius) is a temperature of the heating unit when printing is performed with the low gloss printing mode, and Tgloss (degrees Celsius) is a temperature of the heating unit when printing is performed with the high gloss printing mode.