公开(公告)号：US11274222B2

公开(公告)日：2022-03-15

申请号：US16820764

申请日：2020-03-17

申请人： RICOH COMPANY LTD.

发明人： Yuta Nakamura ,  Naoto Shimura

IPC分类号： C09D11/38 ,  B41M5/00 ,  C09D11/102 ,  C09D11/324 ,  B41J2/21

摘要： An ink contains a coloring material, a urethane resin, diethylene glycol diethyl ether, and a siloxane compound, wherein diethylene glycol diethyl ether has a proportion of 6.0 percent or greater by mass of the total amount of the ink.

公开(公告)号：US11964495B2

公开(公告)日：2024-04-23

申请号：US17422516

申请日：2020-01-21

申请人： RICOH COMPANY, LTD.

发明人： Hiromi Sakaguchi ,  Itsuro Sasaki ,  Ayaka Tanaka ,  Naoto Shimura ,  Shunsuke Horie ,  Hiroshi Gotou ,  Yuta Nakamura

IPC分类号： B41J2/01 ,  B41J2/045 ,  B41J2/21 ,  C09D11/40

CPC分类号： B41J2/211 ,  B41J2/04541 ,  B41J2/2117 ,  C09D11/40

摘要： Provided is an ink set including: an ink containing a cyan pigment; an ink containing a magenta pigment; and an ink containing a yellow pigment, wherein the proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less, and wherein the proportion of the magenta pigment and the proportion of the yellow pigment are both higher than the proportion of the cyan pigment.

公开(公告)号：US11421124B2

公开(公告)日：2022-08-23

申请号：US16996086

申请日：2020-08-18

申请人： RICOH COMPANY, LTD.

发明人： Naoto Shimura ,  Yuta Nakamura ,  Yoshiaki Masuda

IPC分类号： C09D11/38 ,  C09D11/40 ,  B41M5/00 ,  C09D11/102 ,  B41J2/175 ,  C09D11/328

摘要： An ink contains a coloring material, an organic solvent, a resin, and a compound represented by Chemical Formula 1 having a weight average molecular weight of from 390 to 610, where R1 represents a hydrocarbon group, and n represents an integer of 2 or greater.

公开(公告)号：US11472977B2

公开(公告)日：2022-10-18

申请号：US16519362

申请日：2019-07-23

申请人： RICOH COMPANY, LTD.

发明人： Masahiro Kido ,  Hidefumi Nagashima ,  Juichi Furukawa ,  Yuta Nakamura

IPC分类号： C09D11/38 ,  C09D11/322 ,  C09D11/102 ,  B41M5/00

摘要： Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa1/2 or higher but 9.5 MPa1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.

公开(公告)号：US11524509B2

公开(公告)日：2022-12-13

申请号：US16292491

申请日：2019-03-05

申请人： RICOH COMPANY, LTD.

发明人： Yuta Nakamura ,  Naoto Shimura

IPC分类号： C09D11/00 ,  B41J11/00 ,  C09D11/36 ,  C09D11/322 ,  C09D11/38 ,  C09D1/00 ,  C09D4/00 ,  C09D5/00 ,  C09K3/14

摘要： ink includes water, an alcohol having a boiling point of 240 degrees C. or lower, and an infrared absorbent, wherein the alcohol accounts for 5.0 percent by mass or more of the total amount of the ink and the ink is free of an alcohol having a boiling point higher than 240 degrees C.