公开(公告)号：EP2167593B1

公开(公告)日：2017-10-11

申请号：EP08853371.6

申请日：2008-11-20

申请人： Ricoh Company, Ltd.

发明人： NAMBA, Michihiko ,  MOROHOSHI, Naoya ,  OHSHIMA, Tohru ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41M5/00 ,  C09D11/322 ,  C09D11/38 ,  B41M5/50

CPC分类号： B41M5/502 ,  C09D11/322 ,  C09D11/38

公开(公告)号：EP1725622B1

公开(公告)日：2016-12-21

申请号：EP05721422.3

申请日：2005-03-17

申请人： Ricoh Company, Ltd.

发明人： NAMBA, Michihiko ,  HABASHI, Hisashi ,  KOJIMA, Mariko ,  INOUE, Tomohiro ,  BANNAI, Akiko ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/38 ,  C09D11/40

CPC分类号： B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596 ,  B41J2/14274 ,  B41J2/17553 ,  C09D11/38 ,  C09D11/40

公开(公告)号：EP2872338A1

公开(公告)日：2015-05-20

申请号：EP13817634.2

申请日：2013-07-05

申请人： Ricoh Company, Ltd.

发明人： AOAI, Shosuke ,  MAEKAWA, Tsutomu ,  NAMBA, Michihiko ,  SENO, Shinya ,  GOTOU, Hiroshi ,  GOTOH, Akihiko

IPC分类号： B41M5/00 ,  B41J2/01 ,  C09D11/00

CPC分类号： B41M5/0017 ,  B41J11/0015 ,  B41M5/0023 ,  C09D11/322 ,  C09D11/54 ,  Y10T428/24901

摘要： To provide an image forming method, including: a pre-treatment liquid application step for applying a pre-treatment liquid on a recording medium including a substrate and a coating layer at least on one surface of the substrate, wherein the pre-treatment liquid is applied on a surface of the recording layer with the coating layer! a drying step for drying the recording medium on which the pre-treatment liquid has been applied; and an image forming step for forming an image on the recording medium after drying by discharging a water-based ink by inkjet method, wherein the pre-treatment liquid includes a water-soluble cationic polymer, an ammonium salt of an organic acid and water, and wherein the water-based ink includes water and negatively charged colored particles including a colorant.

公开(公告)号：EP1940979A1

公开(公告)日：2008-07-09

申请号：EP06822553.1

申请日：2006-10-24

申请人： Ricoh Company, Ltd.

发明人： KOJIMA, Mariko ,  GOTOH, Akihiko ,  NAMBA, Michihiko ,  NAGAI, Kiyofumi ,  MOROHOSHI, Naoya ,  OHSHIMA, Tohru

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41M5/00

CPC分类号： C09D11/322 ,  B41M5/0023 ,  C09D11/40 ,  Y10T428/24802

摘要： The present invention provides a recording ink set containing a black ink, a cyan ink, a magenta ink, and a yellow ink, each of which contains water, a water-insoluble color material, a water-soluble organic solvent, and a surfactant, wherein the black ink and at least one of the inks other than the black ink respectively contain a different water-soluble organic solvent; and the surface tension of the water-soluble organic solvent(s) used only for the inks other than the black ink is higher than that of the water-soluble organic solvent used only for the black ink; and the present invention also provides a recording method using the recording ink set.

公开(公告)号：EP2061846B1

公开(公告)日：2015-10-07

申请号：EP07806803.8

申请日：2007-08-30

申请人： Ricoh Company, Ltd.

发明人： NAMBA, Michihiko ,  MATSUYAMA, Akihiko ,  MOROHOSHI, Naoya ,  OHSHIMA, Tohru ,  KOYANO, Masayuki ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41M5/00

CPC分类号： C09D11/40 ,  B41M5/0023 ,  C09D11/322 ,  C09D11/38

公开(公告)号：EP1794245B1

公开(公告)日：2009-12-23

申请号：EP05785838.3

申请日：2005-09-16

申请人： Ricoh Company, Ltd.

发明人： KOJIMA, Mariko ,  INOUE, Tomohiro ,  GOTOH, Akihiko ,  NAMBA, Michihiko ,  HABASHI, Hisashi ,  BANNAI, Akiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41J2/175 ,  B41M5/00

CPC分类号： C09D11/30 ,  Y10T428/24802

公开(公告)号：EP2097491A1

公开(公告)日：2009-09-09

申请号：EP07860590.4

申请日：2007-12-26

申请人： Ricoh Company, Ltd.

发明人： BANNAI, Akiko ,  GOTOH, Akihiko

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41M5/00

CPC分类号： B41J2/17506 ,  B41J2/17513 ,  C09D11/30

摘要： A refill ink with which a used ink cartridge is to be refilled, including: a colorant, a wetting agent, and a surfactant, wherein in a mixed ink formed by mixing a residual ink remaining in the used ink cartridge and the refill ink at a volume ratio (residual ink : refill ink) of 1:1, the number A of coarse particles of 0.5μm or greater in diameter measured immediately after the mixing and the number B of coarse particles of 0.5μm or greater in diameter measured after the mixed ink has been left to stand at 25°C and at RH of 50% for 24 hours satisfy the relationship B/A≤2.

公开(公告)号：EP2064296A1

公开(公告)日：2009-06-03

申请号：EP07807594.2

申请日：2007-09-12

申请人： Ricoh Company, Ltd.

发明人： MOROHOSHI, Naoya ,  ARUGA, Tamotsu ,  NAMBA, Michihiko ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41J2/135 ,  B41J2/165 ,  B41J2/175 ,  B41J2/18 ,  B41J2/185 ,  B41M5/00

CPC分类号： B41J2/17593 ,  B41J2/1606 ,  B41J2/162 ,  B41J2/1625 ,  B41J2/1634 ,  B41J2/1642 ,  B41J2/1643 ,  B41J2/1646 ,  B41M5/0023 ,  B41M5/52 ,  C09D11/30

摘要： There is provided a recording ink containing: solid constituents, which contain a colorant and a resin, and stay solid in the ink having a temperature of 25 °C; liquid constituents, which have a higher boiling point than a boiling point of water, and stay liquid in the ink having a temperature of 25 °C; and water, wherein a total amount of the solid constituents in the recording ink is in the range of 2.0% by mass or more to less than 20% by mass, wherein a ratio A/B of a total amount of the liquid constituents in the recording ink A to the total amount of the solid constituents in the recording ink B is from 0.70 to 1.75, and wherein the viscosity of the recording ink at 25 °C is 10mPa s or less.

公开(公告)号：EP1805027A1

公开(公告)日：2007-07-11

申请号：EP05800049.8

申请日：2005-10-26

申请人： Ricoh Company, Ltd.

发明人： BANNAI, Akiko ,  HORI, Eisuke ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： B41J2/175

CPC分类号： C09D11/322 ,  B41J2/17513

摘要： An inkjet recording apparatus is provided, wherein the inkjet recording apparatus comprises a recording head with a filter, an ink that comprises a colorant, a humectant, a surfactant, and a wetting agent is discharged from the recording head, the viscosity of the ink at 25 °C is 6 mPa•s to 13 mPa•s, and the fluid resistance of the filter against the ink is 4.4 x 109 Pa•s/m³ and 2.2 x 1010 Pa•s/m³.

公开(公告)号：EP1725622A1

公开(公告)日：2006-11-29

申请号：EP05721422.3

申请日：2005-03-17

申请人： Ricoh Company, Ltd.

发明人： NAMBA, Michihiko ,  HABASHI, Hisashi ,  KOJIMA, Mariko ,  INOUE, Tomohiro ,  BANNAI, Akiko ,  GOTOH, Akihiko ,  NAGAI, Kiyofumi

IPC分类号： C09D11/00 ,  B41J2/01 ,  B41M5/00

CPC分类号： B41J2/04581 ,  B41J2/04588 ,  B41J2/04593 ,  B41J2/04596 ,  B41J2/14274 ,  B41J2/17553 ,  C09D11/38 ,  C09D11/40

摘要： The object of the present invention is to provide a recording ink which is excellent in color developing properties, has a high delivery stability, can improve remarkably color saturation and can form a high-quality image, when the ink is used for printing a plain paper, further an ink cartridge, an ink record, an inkjet recording apparatus and an inkjet recording process.