公开(公告)号：JP2013253234A

公开(公告)日：2013-12-19

申请号：JP2013093443

申请日：2013-04-26

Applicant: CANON KK

Inventor： NAGAI SOICHI ,  OGASAWARA MIKIFUMI ,  AIDA KEIGO ,  FUJIOKA FUMIAKI ,  YASUDA AKIKO

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

Abstract: PROBLEM TO BE SOLVED: To provide an ink that can achieve image characteristics for recording an image having excellent optical density, bleeding resistance, and white blur resistance and also can achieve reliability that provides excellent sticking resistance to a recording head.SOLUTION: An inkjet ink contains a first pigment and a second pigment. The first pigment is a self-dispersible pigment to a surface of a particle of which a first functional group containing a phosphonic acid group is bonded. The second pigment is a self-dispersible pigment to a surface of a particle of which a second functional group not containing a phosphonic acid group but containing an anionic group other than the phosphonic acid group, and further containing another atomic group is bonded. The introduced amount of the functional group of the second pigment is 0.25 mmol/g or more.

公开(公告)号：JP2003154661A

公开(公告)日：2003-05-27

申请号：JP2001359092

申请日：2001-11-26

Applicant: CANON KK

Inventor： KUDO KIYOMITSU ,  SUZUKI YOSHIAKI ,  OGASAWARA MIKIFUMI ,  SUWA TETSUYA ,  YOSHINO HIROSHI ,  KAWATOKO NORIHIRO

IPC: B41J2/05 ,  B41J2/205

Abstract: PROBLEM TO BE SOLVED: To provide a liquid ejection head in which the width of gray scale representation is widened readily. SOLUTION: The liquid ejection head comprises a first liquid channel having a bubble generating region and supplying a first liquid principally, a second liquid channel communicating with the first liquid channel and supplying a second liquid principally, and a movable member having a free end at a position covering the interconnecting part of the first and second liquid channels and ejects the first and second liquids while mixing them by opening/closing the movable member. The movable member is opened/closed utilizing an electrostatic force between an electrode layer arranged at the free end of the movable member and an electrode layer arranged oppositely to the free end of the movable member.

公开(公告)号：JP2003138168A

公开(公告)日：2003-05-14

申请号：JP2001333201

申请日：2001-10-30

Applicant: CANON KK

Inventor： TAKAHASHI KATSUHIKO ,  OGASAWARA MIKIFUMI ,  TOCHIHARA SHINICHI ,  TOMIOKA HIROSHI ,  KURABAYASHI YUTAKA

IPC: B41J2/01 ,  B41M5/00 ,  B82Y30/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/326 ,  C09D11/38 ,  C09D11/54

Abstract: PROBLEM TO BE SOLVED: To provide an ink set for inkjet recording especially in the color inkjet recording, achieving a highly resoluted pattern of an image (prevention of bleeding in a color image), and speed-up of printing, and to provide an inkjet printing method by using the ink set. SOLUTION: This ink set for the inkjet recording comprises both of a recording ink containing an ultrafine particle pigment having

公开(公告)号：JP2002241656A

公开(公告)日：2002-08-28

申请号：JP2001043524

申请日：2001-02-20

Applicant: CANON KK

Inventor： OGASAWARA MIKIFUMI

IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/328

Abstract: PROBLEM TO BE SOLVED: To provide an ink capable of providing a good character quality of a black character, high image density and excellent light resistance, capable of enabling a reciprocating printing process to be carried out and a gray image to be formed when forming a color image, and capable of providing an image having no density unevenness of the black ink between reciprocal passages by using the black ink and an ink set in which the ionicity is different from each other. SOLUTION: This ink containing at least (a) a cationic pigment dispersion, (b) a water-soluble organic solvent, (c) water and (d) a salt of a weak acid and a weak base, having >=2 quotient of (a molar conductivity at 0.01 mol/1) divided by (a molar conductivity at 0.1 mol/l) is characterized in that the ink has >=40 mv ζ-potential and >=40 dyne/cm surface tension.

公开(公告)号：JP2001072900A

公开(公告)日：2001-03-21

申请号：JP24889399

申请日：1999-09-02

Applicant: CANON KK

Inventor： OGASAWARA MIKIFUMI ,  KURABAYASHI YUTAKA

IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/328

Abstract: PROBLEM TO BE SOLVED: To obtain an ink composition capable of preventing a water-insoluble substance eluted from a specific ink absorber from accumulating in a part related to the discharge of an ink jet and useful for ink jet recording by housing the composition in a ink container having the ink absorber and making the ink composition include a specified additive, a colorant, etc. SOLUTION: This ink composition is housed in an ink container having a polyether polyurethane foam as an ink absorber and is obtained by including (A) a substance capable of solubilizing or dispersing one or more kinds of water- insoluble substances (preferably a polyetherpolyol-based substance) due to unreacted substances or decomposed substances of the above ink absorber, (B) a colorant, (C) a water-soluble organic solvent and (D) water. The component A is preferably a substance represented by the formula (a, b and c are each >=1; the molecular weight of the polyoxypropylene group is 500-30,000; the molecular weight of the polyoxyethylene group is 30-90% based on the total molecular weight) and the content of the substance represented by the formula is preferably 0.05-10 wt.% based on the total amount of the composition.

公开(公告)号：JPH1180635A

公开(公告)日：1999-03-26

申请号：JP25405497

申请日：1997-09-04

Applicant: CANON KK

Inventor： KURABAYASHI YUTAKA ,  MISHINA SHINYA ,  OGASAWARA MIKIFUMI

IPC: B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/328 ,  C09D11/38

Abstract: PROBLEM TO BE SOLVED: To obtain an ink being not problematic in nozzle plugging and improved in startup properties, fixation resistance and delivery stability by including a colorant, a polyhydric alcohol and two compounds having specified structures. SOLUTION: 0.5-10 wt.%, desirably 1.0-7,0 wt. % colorant comprising a water- soluble dye or carbon black, 3-20 wt. % polyhydric alcohol selected among glycerol, ethylene glycol and diethylene glycol, 1-15 wt. % compound of formula I (wherein n is 1-5), 1-15 wt.% compound of formula II (wherein R1 to R4 are each H or a 1-3 C alkyl) and optionally adjuvants such as a surfactant, an antifoam, a pH modifier and a preservative are dissolved or dispersed in water or a mixed solvent containing water and 2-60 wt.%, desirably 5-25 wt.% water- soluble organic solvent to obtain an ink jet recording ink having a surface tension of 15-60 dyn/cm, desirably 20-50 dyn/cm and a viscosity of 15 cP or below, desirably 5 cP or below.

公开(公告)号：JPH08295076A

公开(公告)日：1996-11-12

申请号：JP10202595

申请日：1995-04-26

Applicant: CANON KK

Inventor： OGASAWARA MIKIFUMI ,  KURABAYASHI YUTAKA ,  SATO SHINICHI ,  TAKAHASHI KATSUHIKO

IPC: B41M5/00 ,  B41M5/50 ,  B41M5/52 ,  D21H19/10 ,  D21H27/00

Abstract: PURPOSE: To obtain recording paper excellent in fixation and drying of water ink and preventing an occurrence of feathering by incorporating particulate cellulose of a specific amount per unit area in paper made of mainly a fibrous pulp. CONSTITUTION: Recording paper is manufactured by incorporating particulate cellulose in paper at a rate of 0.1 to 10g per square meter of the paper. In such a case, it is preferable that the particulate cellulose is contained at least on the surface or near the surface of the paper. A cationic substance can be used on the paper in combination with the particulate cellulose. Combined use of these substances increases the effectiveness in preventing feathering and improves coloring. fibrous pulp to be used may be one usually used for paper making, for example, chemical pulp, mechanical pulp or recycled paper pulp which is represented by LBKP and NBKP.

公开(公告)号：JPH08216499A

公开(公告)日：1996-08-27

申请号：JP4660795

申请日：1995-02-13

Applicant: CANON KK

Inventor： TAKAHASHI KATSUHIKO ,  SATO SHINICHI ,  OGASAWARA MIKIFUMI ,  KURABAYASHI YUTAKA

IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/326 ,  C09D11/328 ,  C09D11/38

Abstract: PURPOSE: To provide a method for forming an image by ink jet recording which has excellent fixing properties and character quality level with sufficient image density and high solid image uniformity of an ink jet recording, to prevent bleeding, excellent color reproducibility and water resistance and sufficient with high precise image. CONSTITUTION: A method for forming an image comprises the steps of (A) sticking liquid composition containing at least cationic substance to a medium to be recorded, and (B) discharging liquid droplets of ink containing at least anionic substance from discharge orifice according to a record signal to the medium, wherein the given amount of liquid composition and ink given to an image forming region or image forming region and its vicinity on medium to be recorded per unit area is such that the composition: ink = (1:10) to (8:10).

公开(公告)号：JP2003154650A

公开(公告)日：2003-05-27

申请号：JP2001359089

申请日：2001-11-26

Applicant: CANON KK

Inventor： SUZUKI YOSHIAKI ,  KUDO KIYOMITSU ,  OGASAWARA MIKIFUMI ,  YOSHINO HIROSHI ,  KAWATOKO NORIHIRO ,  SUWA TETSUYA

IPC: B41J2/045 ,  B41J2/055

Abstract: PROBLEM TO BE SOLVED: To solve a technical problem to be posed so that liquids having different concentrations can be discharged from a single nozzle in order to further increase the expression number of gradations in a conventional liquid discharge method having a small expression number of gradations. SOLUTION: A plurality of liquid discharge openings and a plurality of discharge mechanisms are provided for each of which a first liquid channel for mainly supplying a first liquid, a second liquid channel communicating with the first liquid channel for supplying a second liquid, and a movable member are set at a position for covering a communicating part between the first liquid channel and the second liquid channel. In the liquid discharge method, liquids are discharged with a mixing ratio of the first liquid and the second liquid being changed by a displacement of the movable member. An energy for bringing about the displacement of the movable member is obtained from an energy converted from a light energy.

公开(公告)号：JP2001164158A

公开(公告)日：2001-06-19

申请号：JP2000294647

申请日：2000-09-27

Applicant: CANON KK

Inventor： TAKAHASHI KATSUHIKO ,  EGUCHI GAKUO ,  OGASAWARA MIKIFUMI ,  ASAKI NORIYASU ,  KURABAYASHI YUTAKA

IPC: B41J2/01 ,  B41M5/00 ,  C09D11/00 ,  C09D11/322 ,  C09D11/324 ,  C09D11/326 ,  C09D11/328 ,  C09D11/38

Abstract: PROBLEM TO BE SOLVED: To provide a water base ink composition which gives high quality level images, particularly excels in intermittent discharge stability and does not cause attachment of a thickened substance of the ink to the surface of a discharge opening. SOLUTION: The water base ink composition comprises colorant-containing resin fine particles, pigment fine particles, and a polyhydric alcohol and, in addition, at least one of the compound represented by formula (I) and that represented by formula (II) (wherein R1 to R5 are each independently H, CH3 or C2H5). An ink cartridge, a recording unit and ink jet recording equipment and a recording method are also provided.