Dry Multicolor Toner (i.e., Composition Containing More Than One Colored Toner (e.g., Cyan, Magenta, And Yellow Toners, Etc.)) With Chemically Identified Colorant Or Colorant Identified By Color Patents (Class 430/107.1)
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Patent number: 8663884Abstract: An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of ?20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.Type: GrantFiled: March 2, 2011Date of Patent: March 4, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yohei Ohno, Kaori Soeda, Miyuki Murakami
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Patent number: 8652719Abstract: A set of toners including yellow, cyan, magenta, and black toner, each of which containing a binder resin containing a crystalline resin and a non-crystalline resin, a releasing agent, and a corresponding coloring agent, wherein the following relationship is satisfied: 0.8<EBk/EFc<0.95, where EBk represents the amount of heat of melting (mJ/mg) for the black toner and EFc represents the average amount of heat of melting (mJ/mg) of the yellow toner, magenta toner, and cyan toner from 50° C. to 100° C. at the first temperature rising in differential scanning calorimetry (DSC).Type: GrantFiled: April 18, 2012Date of Patent: February 18, 2014Assignee: Ricoh Company, Ltd.Inventors: Osamu Uchinokura, Satoshi Ogawa, Junichi Awamura, Teruki Kusahara, Daisuke Ito, Daisuke Inoue
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Publication number: 20140023964Abstract: Provided is a toner set including at least a first brilliant toner that contains a brilliant pigment, and a second brilliant toner that contains a brilliant pigment and exhibits a different color from the first brilliant toner.Type: ApplicationFiled: April 2, 2013Publication date: January 23, 2014Applicant: FUJI XEROX CO., LTD.Inventors: Sakiko HIRAI, Shotaro TAKAHASHI, Masaru TAKAHASHI, Atsushi SUGITATE, Shuji SATO
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Patent number: 8632932Abstract: A toner including a binder resin comprising a resin (a) comprising a polyhydroxycarboxylic acid skeleton formed from an optically-active monomer. The polyhydroxycarboxylic acid skeleton has a weight average molecular weight of from 7,000 to 60,000. The binder resin comprises the polyhydroxycarboxylic acid skeleton in an amount of from 10 to 90% by weight. The optical purity X (%) of the polyhydroxycarboxylic acid skeleton represented by the following formula is 80% or less: X(%)=|X(L-isomer)?X(D-isomer)| wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.Type: GrantFiled: December 30, 2009Date of Patent: January 21, 2014Assignee: Ricoh Company, LimitedInventors: Akiyoshi Sabu, Akihiro Kotsugai, Ryota Inoue, Keiko Osaka, Shingo Sakashita, Yukiko Nakajima, Satoshi Mochizuki
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Patent number: 8592112Abstract: An orange toner including a binder resin containing a polyester resin having a dodecenyl succinic acid structure as a constituent unit; and C.I. Pigment Orange 38 in a blending amount of from 5% by mass to 18% by mass relative to the whole mass of the toner and a toner storage container for storing the same, an orange developer and a process cartridge for storing the same, a color toner set, and an image forming apparatus.Type: GrantFiled: March 25, 2011Date of Patent: November 26, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Yoshida, Akira Matsumoto, Masanobu Ninomiya, Yusuke Ikeda
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Patent number: 8568947Abstract: Disclosed is a green toner for developing a static latent image containing a binder resin and a colorant, and the colorant contains C.I. Solvent Green 5 and colorant compound X represented by Formula (1), and content ratio of C.I. Solvent Green 5 in whole amount of the colorant is 5 to 50% by weight, in the Formula (1), M1 is a metal atom of Group 14, Q is independently a monovalent substituent, m and n are each 0 or 1, at least one of m and n is 1, and A is independently an atomic group forming an aromatic ring which may have a substituent.Type: GrantFiled: February 13, 2012Date of Patent: October 29, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yohei Ohno, Hajime Tadokoro, Kaori Matsushima, Hiroyuki Yasukawa, Ito Koga
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Patent number: 8535864Abstract: A magenta toner including toner particles containing a colorant and a binder resin is provided. The colorant contains C.I. Pigment Red 122 and C.I. Pigment Yellow 180 and a mass ratio of the C.I. Pigment Red 122 and the C.I. Pigment Yellow 180 is in the range of 99:1 to 10000:1. The binder resin contains a polyester resin and a polyester resin having a repeating unit obtained from a Bisphenol A alkylene oxide adduct expressed by the following chemical formula is used as the polyester resin: wherein m and n independently represent an integer of 2 to 4, and x and y independently represent a positive number.Type: GrantFiled: January 18, 2012Date of Patent: September 17, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Eisuke Iwazaki, Yuki Takamiya, Satoshi Inoue
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Patent number: 8507165Abstract: Black particles include a black pigment; and a cyan pigment, wherein when the reflectance to light of wavelength of 420 nm and the reflectance to light of wavelength of 770 nm of plural samples are measured, the standard deviations (1?) of the measured values are about 1 or less with respect to both wavelengths.Type: GrantFiled: November 28, 2012Date of Patent: August 13, 2013Assignee: Fuji Xerox Co., Ltd.Inventor: Shigeru Seitoku
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Patent number: 8492060Abstract: Provided are a method of forming a toner image and an electrophotographic image forming apparatus including a toner. The method of forming a toner image is performed using a first toner having a yellow color and color coordinate values of a lightness (L) ranging from 91 to 94, a redness (a) ranging from ?11 to ?9, and a yellowness (b) ranging from 77 to 82; a second toner having a magenta color and color coordinate values of a lightness (L) ranging from 56 to 61, a redness (a) ranging from 56 to 61, and a yellowness (b) ranging from ?7 to ?5; and a third toner having a cyan color and color coordinate values of a lightness (L) ranging from 58 to 62, a redness (a) ranging from ?33 to ?30, and a yellowness (b) ranging from ?42 to ?37.Type: GrantFiled: June 4, 2009Date of Patent: July 23, 2013Assignee: Samsung Fine Chemicals Co., Ltd.Inventors: Dae Woong Choi, Woo Young Yang, Keon Il Kim, Dae Il Hwang, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dong Won Kim, Duck Kyun Ahn
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Publication number: 20130164667Abstract: A magenta toner for electrophotography, including: toner particles containing, a polyester resin, a coloring agent containing a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, a release agent, and inorganic particles; and an external additive, wherein an average particle diameter of the inorganic particle is 0.75 times or more the average particle diameter of the coloring agent.Type: ApplicationFiled: May 3, 2012Publication date: June 27, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Satoshi KAMIWAKI, Akira MATSUMOTO, Yusuke IKEDA, Yukiaki NAKAMURA, Masanobu NINOMIYA
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Publication number: 20130157188Abstract: Disclosed is a toner composition comprising: (a) a resin; and (b) a colorant which comprises: (1) Pigment Red 269; (2) Pigment Red 185; and (3) Pigment Red 122.Type: ApplicationFiled: December 15, 2011Publication date: June 20, 2013Applicant: Xerox CorporationInventors: Grazyna E. Kmiecik-Lawrynowicz, Maura A. Sweeney, Mark E. Mang, Kirk L. Stamp, Robert D. Bayley
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Publication number: 20130157187Abstract: The disclosure describes a pigment treated with a rosin and a toner particle containing that rosin-treated pigment particle. The toner has a lower level of dielectric loss.Type: ApplicationFiled: December 14, 2011Publication date: June 20, 2013Applicant: Xerox CorporationInventors: Ke Zhou, Rina Carlini, Daryl W. Vanbesien, Cuong Vong, Karen A. Moffat, Richard P.N. Veregin
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Patent number: 8465894Abstract: A red toner for electrostatic image development, includes: a binder resin; a coloring agent; and a release agent, wherein the red toner for electrostatic image development satisfies the following formulae: 0.3<ID<1.2 5°<A<35° wherein ID represents an image density when a first image is formed on a recording material with a toner loaded amount of 4.0 g/m2 of the red toner; and A represents a hue angle of the first image expressed by an L*a*b* color coordinate space, provided that a hue angle of 0° is on the a*+ axis and a hue angle of 90° is on the b*+ axis.Type: GrantFiled: September 21, 2009Date of Patent: June 18, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Kiyohiro Yamanaka, Satoshi Yoshida, Masanobu Ninomiya
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Patent number: 8431295Abstract: Disclosed are a toner for developing an electrostatic image, a full color toner kit and an image formation method, the toner containing at least a resin and a colorant, wherein the colorant comprises a quinacridone pigment having a number average primary particle size of from 30 to 150 nm and having a ratio of a major axis direction length to a minor axis direction length of from 1.0 to 2.0 and Pigment Red 238.Type: GrantFiled: July 2, 2010Date of Patent: April 30, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroyuki Yasukawa, Hiroshi Yamazaki, Kaori Soeda
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Publication number: 20130095420Abstract: An electrophotographic toner according to an embodiment includes toner particles, which contain a coloring material containing C.I. Pigment Red 48 and C.I. Pigment Red 122 at a weight ratio of from 30:70 to 80:20, a binder resin containing an amorphous polyester resin and a crystalline polyester resin, a wax, and a charge control agent, and which have a glass transition point (Tg) of from 30 to 45° C. and an acid value of from 10 to 17 mgKOH/g.Type: ApplicationFiled: September 24, 2012Publication date: April 18, 2013Applicants: TOSHIBA TEC KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventor: Shiho Moriya
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Publication number: 20130084519Abstract: The disclosure describes a toner process in which portion-wise addition of colorant(s) during particle formation is used to control the distribution of colorant within the toner particle, thereby enhancing A zone charge.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Applicant: XEROX CORPORATIONInventors: Ke Zhou, Shigang Qiu, Kimberly Nosella, Cuong Vong
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Publication number: 20130078564Abstract: A magenta toner including toner particles containing a colorant and a binder resin is provided. The colorant contains C.I. Pigment Red 122 and C.I. Pigment Yellow 180 and a mass ratio of the C.I. Pigment Red 122 and the C.I. Pigment Yellow 180 is in the range of 99:1 to 10000:1. The binder resin contains a polyester resin and a polyester resin having a repeating unit obtained from a Bisphenol A alkylene oxide adduct expressed by the following chemical formula is used as the polyester resin: wherein m and n independently represent an integer of 2 to 4, and x and y independently represent a positive number.Type: ApplicationFiled: January 18, 2012Publication date: March 28, 2013Applicant: FUJI XEROX CO., LTD.Inventors: Eisuke IWAZAKI, Yuki TAKAMIYA, Satoshi INOUE
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Patent number: 8399166Abstract: Disclosed are a toner for developing an electrostatic image, a full color toner kit and an image formation method layer, the toner comprising at least a resin and a colorant, wherein the colorant includes quinacridone pigment having a number average primary particle size of from 30 to 150 nm and having a ratio of a long axis length to a short axis length of from 1.0 to 2.0.Type: GrantFiled: March 20, 2009Date of Patent: March 19, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Hiroshi Yamazaki, Ken Ohmura, Kenji Hayashi
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Patent number: 8394561Abstract: The present disclosure provides violet toners and methods for their production. In embodiments, methods of the present disclosure include systems which may be utilized to predict the color properties of a violet toner, thereby permitting adjustment of the pigment loading and/or target mass per unit area.Type: GrantFiled: July 20, 2009Date of Patent: March 12, 2013Assignee: Xerox CorporationInventors: Jordan H. Wosnick, Suxia Yang, Richard P. N. Veregin, Karen A. Moffat
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Patent number: 8389186Abstract: A toner set is composed of toners of a plurality of colors that are used in a tandem-type color image forming apparatus. Each of the toners of a plurality of colors includes toner base particles and an external additive. The external additive includes small-diameter silica particles and large-diameter silica particles larger than the small-diameter silica particles. When, of the toners of a plurality of colors, three color toners to be used consecutively for forming the toner image are defined as a first toner, second toner and third toner respectively in order of usage thereof, the average particle diameter of the large-diameter silica particles contained in the second toner is smaller than the average particle diameter of the large-diameter silica particles contained in the first toner and is larger than the average particle diameter of the large-diameter silica particles contained in the third toner.Type: GrantFiled: October 21, 2010Date of Patent: March 5, 2013Assignee: Kyocera Mita CorporationInventor: Takeo Mizobe
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Patent number: 8389190Abstract: Disclosed are a toner for developing an electrostatic latent image and a method of preparing the toner. The toner may include a latex, a colorant and a releasing agent, and may further include sulfur (S), iron (Fe) and silicon (Si). The [S]/[Fe] ratio may be within the range between about 5.0×10?4 and about 5.0×10?2. The [Si]/[Fe] ratio may be within the range of between about 5.0×10?4 and about 5.0×10?2. [S], [Fe] and [Si] are the amounts of S, Fe and Si measured by X-ray fluorescence spectrometry, respectively.Type: GrantFiled: October 21, 2009Date of Patent: March 5, 2013Assignee: Samsung Electronics Co., LtdInventors: Jae-Hwan Kim, Jun-Young Lee, Yo-Da Shin, Tae-Hoe Koo
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Publication number: 20130017480Abstract: A toner set for electrophotography, including a black toner; a yellow toner; a magenta toner; a cyan toner; and a bright yellow toner, wherein the magenta toner includes a magenta colorant mainly including C.I. Pigment Red 122, the yellow toner has a hue angle of from 93 to 100° and the bright yellow toner has a hue angle of from 60 to 85° in L*a*b* color system.Type: ApplicationFiled: June 19, 2012Publication date: January 17, 2013Inventors: Kazumi SUZUKI, Tatsuya MORITA, Shingo SAKASHITA
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Patent number: 8349069Abstract: Black particles include a black pigment; and a cyan pigment, wherein when the reflectance to light of wavelength of 420 nm and the reflectance to light of wavelength of 770 nm of plural samples are measured, the standard deviations (1?) of the measured values are about 1 or less with respect to both wavelengths.Type: GrantFiled: December 4, 2009Date of Patent: January 8, 2013Assignee: Fuji Xerox Co., Ltd.Inventor: Shigeru Seitoku
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Patent number: 8323863Abstract: An image forming method includes forming at least one electrostatic charge image on at least one image holding member, developing the at least one electrostatic charge image using a black toner and a color toner to form toner images, transferring toner images to a receiving body, and fixing the toner images by light-irradiation fusing, the black toner being melted in the light-irradiation fusing, the color toner containing an infrared absorber, a light absorptance of the color toner at a peak wavelength of the light irradiated in the light-irradiation fusing being from about 79% to about 98% of a light absorptance of the black toner at the peak wavelength, and the color difference ?E of the color toner due to the presence or absence of the infrared absorber is in a specific range.Type: GrantFiled: August 7, 2009Date of Patent: December 4, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Miho Watanabe, Takashi Matsubara, Shinji Hasegawa, Makoto Furuki
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Patent number: 8313878Abstract: A toner set has toners used in an image forming method by forming a toner image with toners of several colors and fixing the toner image onto a recording medium. The toners include first and second toners of different colors. The first and second toners contain toner base particles including a binding resin, a colorant and a wax. The colorant of the first toner contains a quinacridone pigment. The wax includes a carnauba wax and a wax other than the carnauba wax. The base particles of the first toner have a mass % Wq1 of carnauba wax and Wo1 of the other wax and the base particles of the second toner have a mass % Wq2 of carnauba wax and Wo2 of the other wax. These mass % values are selected to satisfy the following: Wq1/(Wq1+Wq2)<Wo1/(Wo1+Wo2) 3?Wo1+Wo2<Wq1+Wq2?10.Type: GrantFiled: August 17, 2010Date of Patent: November 20, 2012Assignee: Kyocera Mita CorporationInventor: Koji Kuramashi
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Patent number: 8313879Abstract: A full-color toner set including a yellow component, a cyan component, and a magenta component, wherein in each of the color components, resin fine particles are added to a surface of base particles. Further, the yellow component may include a monoazo pigment serving as a colorant in the base particles. In addition, the following formulae (1) and (2) may be satisfied, where the amount of addition of the resin fine particles based on 100 parts by mass of base particles in the yellow component is represented by Wy, the amount of addition of the resin fine particles based on 100 parts by mass of base particles in the cyan component is represented by Wc, and the amount of addition of the resin fine particles based on 100 parts by mass of base particles in the magenta component is represented by Wm, Wy>Wc??(1) Wy>Wm??(2).Type: GrantFiled: May 11, 2009Date of Patent: November 20, 2012Assignee: KYOCERA Document Solutions Inc.Inventor: Koji Kuramashi
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Publication number: 20120288299Abstract: A set of toners including yellow, cyan, magenta, and black toner, each of which containing a binder resin containing a crystalline resin and a non-crystalline resin, a releasing agent, and a corresponding coloring agent, wherein the following relationship is satisfied: 0.8<EBk/EFc<0.95, where EBk represents the amount of heat of melting (mJ/mg) for the black toner and EFc represents the average amount of heat of melting (mJ/mg) of the yellow toner, magenta toner, and cyan toner from 50° C. to 100° C. at the first temperature rising in differential scanning calorimetry (DSC).Type: ApplicationFiled: April 18, 2012Publication date: November 15, 2012Inventors: Osamu UCHINOKURA, Satoshi Ogawa, Junichi Awamura, Teruki Kusahara, Daisuke Ito, Daisuke Inoue
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Patent number: 8298740Abstract: Provided are toner for developing an electrostatic latent image and a method of preparing the same. The toner has G?(60) of about 4.0×107 Pa to about 4.0×108 Pa, G?(60)/G?(80) of about 100 to about 500, and G?(100, 140) of about 3.0×103 Pa to about 1.5×105 Pa. The G?(60) and G?(80) are storage moduli Pa at about 60° C. and about 80° C. under measurement conditions of an angular velocity of about 6.28 rad/s and a heating rate of about 2.0° C./minute, respectively. The G?(100, 140) is a storage modulus Pa at a temperature of about 100° C. to about 140° C. under measurement conditions of an angular velocity of about 6.28 rad/s and a heating rate of about 2.0° C./minute.Type: GrantFiled: October 2, 2009Date of Patent: October 30, 2012Assignee: SAMSUNG Electronics Co., Ltd.Inventors: Jae-Hwan Kim, Jun-Young Lee, Yo-Da Shin, Tae-Hoe Koo
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Patent number: 8298737Abstract: A white toner for electrostatic charge image development is disclosed. The white toner for electrostatic charge image development includes a binder resin, a first white pigment, a second white pigment, and a release agent, a specific gravity D1 of the first white pigment satisfying a condition of 3.5<D1<6.0, a specific gravity D2 of the second white pigment satisfying a condition of 0.3<D2<1.2, a total content of the first white pigment and the second white pigment being in the range of from about 20% by weight to about 50% by weight with respect to a total weight of the white toner for electrostatic charge image development, and the release agent including a metal salt.Type: GrantFiled: September 1, 2010Date of Patent: October 30, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Kadokura, Yukiaki Nakamura, Noriyuki Mizutani, Atsushi Sugawara, Yusuke Ikeda
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Patent number: 8293440Abstract: The present invention provides a white toner for electrostatic image development, including a binder resin, a first white pigment and a second white pigment, the specific gravity D1 of the first white pigment satisfies the relationship of about 3.5<D1<about 6.0, and the specific gravity D2 of the second white pigment satisfies the relationship of about 0.3<D2<about 1.2.Type: GrantFiled: May 14, 2010Date of Patent: October 23, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Yukiaki Nakamura, Yasuo Kadokura, Noriyuki Mizutani, Atsushi Sugawara, Yusuke Ikeda
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Publication number: 20120237865Abstract: A toner set includes a plurality of toners, at least one toner but less than all toners of the toner set including binder, colorant and fluorescence agent and remaining additional toners including binder, colorant and free of fluorescence agent. At least a first toner grouping and a second toner grouping of the toner set form a combination, the first and second groupings of the combination exhibiting a substantially same color under ambient light conditions upon image formation. The first toner grouping and the second toner grouping of the combination contain a different amount of the fluorescence agent, wherein upon exposure to activating energy, the fluorescence agent fluoresces to cause a visible change in the color of a pattern formed in an image by the first toner grouping as compared to the second toner grouping.Type: ApplicationFiled: May 30, 2012Publication date: September 20, 2012Applicant: XEROX CORPORATIONInventors: Peter M. KAZMAIER, Gabriel IFTIME, Daryl W. VANBESIEN, Edward G. ZWARTZ, Shen-ge WANG, Reiner ESCHBACH
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Patent number: 8268522Abstract: A toner set for electrostatic image development, includes: at least one kind of a colored toner that contains a coloring agent; and a transparent toner that does not substantially contain a coloring agent, wherein a proportion of particles having a shape factor of 0.94 or less in mother particles of the transparent toner is about 5% by number or less based on particles having a particle diameter of 7.5 to 15 ?m, and a reflectance of the mother particles of the transparent toner is about 90% or more for light at a wavelength of 700 nm.Type: GrantFiled: September 21, 2009Date of Patent: September 18, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuo Kadokura, Yusuke Ikeda, Yukiaki Nakamura, Masanobu Ninomiya, Susumu Yoshino
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Publication number: 20120231385Abstract: An electrophotographic toner set which is excellent in color reproduction of low lightness regions to high lightness regions in an intermediate color region (red) is disclosed, comprising at least a yellow toner, a magenta toner and a third electrophotographic toner, wherein, in a color specification system of a CIE LAB color space, a lightness L* of the magenta toner is within a range of 35-50, a lightness L* and a hue angle h of the third electrophotographic toner is within a range of 50-65 and 0-65°, respectively, and a difference in hue angle between a color represented by the yellow toner and a color represented by the magenta toner is within a range of 114-130°.Type: ApplicationFiled: November 9, 2010Publication date: September 13, 2012Applicant: Konica Minolta Business Technologies, Inc.Inventors: Keigo Tamaki, Kimihiko Ookubo
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Patent number: 8241827Abstract: An electrostatic image developing toner which is capable of obtaining highly chromatic full-color images of bright color without causing perceived color contamination and exhibits superior lightfastness is disclosed, wherein the toner comprises a binding resin and a colorant, and the colorant is tetraazaporphyrin or phthalocyanine compounds such as a compound represented by the following formula:Type: GrantFiled: October 16, 2007Date of Patent: August 14, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroyuki Yasukawa, Mikio Kouyama, Kenji Hayashi, Tomoko Sakimura, Hiroaki Obata, Natsuko Kusaka
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Patent number: 8236472Abstract: Provided is a method for forming an image with a set of electrostatic charge image developing toners using a digital electrophotographic method, provided that the set of electrostatic charge image developing toners comprises a black toner and a light gray toner, the method comprising the steps of: forming an electrostatic latent image on an image support; developing the electrostatic latent image with the black toner to form a black toner image; developing the electrostatic latent image with the light gray toner to form a light gray toner image; and fixing the black toner image and the light gray toner image, wherein the black toner and the light gray toner each independently contains a wax having an endothermic peak in the range of 60 to 105° C.; and the light gray toner has a transmittance in the range of 40 to 90%.Type: GrantFiled: November 24, 2009Date of Patent: August 7, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tatsuya Fujisaki, Kaori Soeda, Shinya Obara, Natsuko Kusaka
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Publication number: 20120183894Abstract: A magenta toner includes a binder resin containing a polyester resin having a dodecenylsuccinic acid structure as a constituent unit, and a solid solution of C.I. Pigment Violet 19 and C.I. Pigment Red 122, the magenta toner having an amount of the solid solution of from 2% by mass to 30% by mass based on the total mass of the toner.Type: ApplicationFiled: September 1, 2011Publication date: July 19, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Akira MATSUMOTO, Yusuke IKEDA, Eiji NAKAI
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Patent number: 8211600Abstract: The present disclosure provides processes for producing images of excellent color fidelity when incorporating a magenta toner with a lower colorant loading in addition to a first magenta toner. In embodiments, the magenta pigmented particles may be magenta emulsion aggregation toners. In accordance with the present disclosure, a pair of magenta toners are matched in color, wherein the color of a first magenta toner printed at a predetermined halftone area coverage on a substrate substantially matches the color of the solid (100%) printed patch of the second magenta toner, which is lighter than the first magenta toner, thus avoiding a visible hue shift on the print that would otherwise be objectionable.Type: GrantFiled: August 21, 2011Date of Patent: July 3, 2012Assignee: Xerox CorporationInventors: Daryl Vanbesien, Karen Moffat, Yi Xin Gong, Edul Dalal, Jing Wang, Richard Veregin, Jordan Wosnick, Cuong Vong, Valerie Farrugia
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Patent number: 8192906Abstract: A black toner formulation includes at least one non-black colorant selected from the group consisting of dyes, pigments, and combinations thereof. The black toner formulation has a total pigment loading of about 2 percent to less than or equal to about 9.5 percent by weight of total weight of the black toner formulation.Type: GrantFiled: March 13, 2009Date of Patent: June 5, 2012Assignee: Lexmark International, Inc.Inventor: Gary Allen Denton
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Patent number: 8178267Abstract: A set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at least one pigment selected from the group consisting of C.I. Pigment Yellow 74, C.I. Pigment Yellow 139, C.I. Pigment Yellow 155, C.I. Pigment Yellow 180 and C.I.Type: GrantFiled: May 20, 2009Date of Patent: May 15, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naohiro Hirose, Meizo Shirose, Kaori Soeda, Shiro Hirano, Shinya Obara
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Publication number: 20120082926Abstract: A toner comprising an amorphous polyester, a crystalline polyester that is forming domains in the toner, and a colorant that is being dispersed at least in the domains of the crystalline polyester. The toner may be obtained by dispersing an oil phase including the amorphous polyester or a precursor capable of producing the amorphous polyester, the crystalline polyester, the colorant, and an organic solvent, in an aqueous medium to prepare an O/W dispersion, the oil phase; and removing the organic solvent from the O/W dispersion.Type: ApplicationFiled: September 20, 2011Publication date: April 5, 2012Inventors: Kazumi SUZUKI, Tatsuya MORITA, Shingo SAKASHITA, Tsuyoshi SUGIMOTO
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Publication number: 20120077119Abstract: An orange toner including a binder resin containing a polyester resin having a dodecenyl succinic acid structure as a constituent unit; and C.I. Pigment Orange 38 in a blending amount of from 5% by mass to 18% by mass relative to the whole mass of the toner and a toner storage container for storing the same, an orange developer and a process cartridge for storing the same, a color toner set, and an image forming apparatus.Type: ApplicationFiled: March 25, 2011Publication date: March 29, 2012Applicant: FUJI XEROX CO., LTD.Inventors: Satoshi YOSHIDA, Akira MATSUMOTO, Masanobu NINOMIYA, Yusuke IKEDA
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Patent number: 8092963Abstract: The present disclosure provides processes for producing images of excellent color fidelity when incorporating a magenta toner with a lower colorant loading in addition to a first magenta toner. In embodiments, the magenta pigmented particles may be magenta emulsion aggregation toners. In accordance with the present disclosure, a pair of magenta toners are matched in color, wherein the color of a first magenta toner printed at a predetermined halftone area coverage on a substrate substantially matches the color of the solid (100%) printed patch of the second magenta toner, which is lighter than the first magenta toner, thus avoiding a visible hue shift on the print that would otherwise be objectionable.Type: GrantFiled: January 19, 2010Date of Patent: January 10, 2012Assignee: Xerox CorporationInventors: Daryl W. Vanbesien, Karen Ann Moffat, Yi Xin Gong, Edul N. Dalal, Jing Wang, Richard P. N. Veregin, Jordan H. Wosnick, Cuong Vong, Valerie M. Farrugia
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Patent number: 8084175Abstract: Provided is a set of toners comprising a yellow toner, a magenta toner, a cyan toner and a black toner for forming a full color image with an electrophotographic method, wherein the yellow toner comprises toner particles containing at east one pigment selected from the group consisting of C. I. Pigment Yellow 74, C. I. Pigment Yellow 139, C. I. Pigment Yellow 180, C. I. Pigment Yellow 185 and C. I.Type: GrantFiled: May 19, 2009Date of Patent: December 27, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naohiro Hirose, Kaori Soeda, Shinya Obara, Tatsuya Fujisaki, Yohei Ohno
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Patent number: 8080353Abstract: A toner having its surface functionalized with functional groups, and processes for producing the same, are provided.Type: GrantFiled: September 4, 2007Date of Patent: December 20, 2011Assignee: Xerox CorporationInventors: Zhen Lai, Yuhua Tong, Chieh-Min Cheng
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Patent number: 8062818Abstract: An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and excellent light stability is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue 76. There are also disclosed a full-color toner kit and an image forming method by use of the toner.Type: GrantFiled: March 18, 2009Date of Patent: November 22, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikio Kouyama, Hiroshi Yamazaki, Ken Ohmura, Kenji Hayashi
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Publication number: 20110223528Abstract: An orange toner for developing electrostatic charge images includes a binder resin; and a colorant including a first color material and a second color material; wherein the first color material has a hue angle of ?20° to 80° in a L*a*b* color system, the second color material includes C.I. Solvent Orange 63, and the second color material has a content of 0.05 to 0.2 parts by mass to 100 parts by mass of the binder resin.Type: ApplicationFiled: March 2, 2011Publication date: September 15, 2011Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yohei OHNO, Kaori SOEDA, Miyuki MURAKAMI
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Patent number: 8007973Abstract: A full-color toner kit including yellow, magenta, and cyan toners each including a benzimidazolone, a naphthol, and a copper phthalocyanine colorants, respectively, and resins (A) and (B) each of which having a polyester skeleton and containing a wax, and a resin (C) having a polyester skeleton and containing no wax. Each of the toners has a softening point of from 125° C. to 135° C. The following relationships are satisfied: Ts(A)<Ts(B), Ay+5?Am?Ay+15, and Ac+5?Am?Ac+15, wherein Ts(A) and Ts(B) (° C.) each represent softening points of the resin (A) and (B), respectively, and Ay, Am, and Ac each represent ratios (% by weight) of the amount of the resin (A) to total amount of the resins (A) and (B) in the yellow, magenta, cyan toners, respectively.Type: GrantFiled: December 27, 2007Date of Patent: August 30, 2011Assignee: Ricoh Company, LimitedInventors: Kazuoki Fuwa, Yoshihiro Mikuriya, Masayuki Hagi, Hideaki Yasunaga, Hiroaki Katoh, Yoshitaka Sekiguchi
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Patent number: 8007976Abstract: A toner is provided that comprises a colorant and a binder resin, wherein the binder resin comprises a polyester resin that is prepared by a polycondensation reaction in the presence of at least a titanium-containing catalyst expressed by General Formula (II) or (II), the toner has a volume average particle diameter of 2.0 ?m to 10.0 ?m and a ratio Dv/Dn within a range of 1.00 to 1.Type: GrantFiled: November 1, 2006Date of Patent: August 30, 2011Assignee: Ricoh Company. Ltd.Inventors: Hideki Sugiura, Hiroyuki Fushimi, Osamu Uchinokura, Takahiro Honda, Masami Tomita, Hyo Shu, Ken Umehara
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Publication number: 20110177442Abstract: The present disclosure provides processes for producing images of excellent color fidelity when incorporating a magenta toner with a lower colorant loading in addition to a first magenta toner. In embodiments, the magenta pigmented particles may be magenta emulsion aggregation toners. In accordance with the present disclosure, a pair of magenta toners are matched in color, wherein the color of a first magenta toner printed at a predetermined halftone area coverage on a substrate substantially matches the color of the solid (100%) printed patch of the second magenta toner, which is lighter than the first magenta toner, thus avoiding a visible hue shift on the print that would otherwise be objectionable.Type: ApplicationFiled: January 19, 2010Publication date: July 21, 2011Applicant: XEROX CORPORATIONInventors: Daryl W. Vanbesien, Karen Ann Moffat, Yi Xin Gong, Edul N. Dalal, Jing Wang, Richard P.N. Veregin, Jordan H. Wosnick, Cuong Vong, Valerie M. Farrugia
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Publication number: 20110177443Abstract: The present disclosure provides blue toners and methods for their production. In embodiments, methods of the present disclosure include systems which may be utilized to predict the color properties of a blue toner, thereby permitting adjustment of the pigment loading and/or toner mass per unit area.Type: ApplicationFiled: January 20, 2010Publication date: July 21, 2011Applicant: XEROX CORPORATIONInventors: Jordan H. Wosnick, Richard P.N. Veregin, Eric Rotberg