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| Number | Title | Issue Date |
| 8133647 | Black toners containing infrared transmissive A toner formulation is disclosed comprising a binder, an IR absorbing colorant, and one or more infrared transmissive colorants, wherein the colorants are configured to provide a low reflectivity in the visible region of the spectrum and an intermediate reflectivity... | 03/13/2012 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7303847 | Dry toner A dry toner is provided that is prepared by a method including the steps of (A) dissolving or dispersing a toner composition in an organic solvent to prepare a toner composition liquid and (B) dispersing the toner composition liquid in an aqueous liquid which contai... | 12/04/2007 |
| 7171145 | Developing device and process cartridge for an image forming apparatus A method of developing a latent image formed on an image carrier with toner, including causing a developer carrier, which faces the image carrier and accommodates a magnet therein, to support a developer having a toner and a magnetic carrier supporting the toner and... | 01/30/2007 |
| 7070895 | Magnetic toner composition having superior electrification homogeneity The present invention relates to a magnetic toner composition, and more particularly to a magnetic toner composition having an improved chargeability and excellent uniform chargeability, and that is capable of reducing a difference in electrostatic charge between a ... | 07/04/2006 |
| 7052814 | Toner A toner for use in an oil-less fixing system free from an oil coating on a fixing roller, the toner includes a binder resin and a wax as well as carbon black having an oil absorption of 50 to 100 mL/100 g where the toner is the black toner or a coloring agent where ... | 05/30/2006 |
| 7026088 | Master batch and toner for use in electrophotography The master comprises a polyester resin as a binder resin and a carbon black as a colorant having a primary particle size of 10 nm to 100 nm, is blended with 30 to 60 parts by weight of the carbon black, has a lightness L* of 20 or more; and the reflectance A at 400 ... | 04/11/2006 |
| 7022449 | Black toner with defined loss tangent To provide a black toner having excellent charging property and transferring property against a severe environmental change. The black toner includes toner particle containing at least a binder resin, carbon black and a releasing agent, wherein: the toner particles ... | 04/04/2006 |
| 6967070 | Electrophotographic toner and image forming method An electrophotographic toner comprising a binder resin and a colorant, which is used in electrophotographic process employing a flash fixing system for fixation of a transferred toner image, wherein the binder resin is a polyester ... | 11/22/2005 |
| 6838218 | Black toner A black toner comprises a binder resin and black composite particles having an average particle diameter of 0.005 to 0.30 μm, and comprising: extender pigments as core particles; a gluing agent-coating layer formed on surface of the respective core particles; and a... | 01/04/2005 |
| 6440628 | Tones for development of electrostatic image and production process thereof A toner for development of electrostatic images comprising carbon black as a colorant, wherein the carbon black has the following features: (1) the primary particle diameter being within a range of 28 to 60 nm; (2) the DBP oil absorption being within a range of 40 ... | 08/27/2002 |
| 6316157 | Toner and image forming method A non-metallic black toner is disclosed. The toner has toner particles containing at least a binder resin, a carbon black and an organometallic compound, and an external additive. The toner particles contain 10 to 200 ppm of at least one kind of alkali me... | 11/13/2001 |
| 6132916 | Toner for developing electrostatic latent images A toner for developing electrostatic latent images in accordance with the invention features the addition of a charge control agent comprising a carboxylate compound or an ascorbate compound represented by a general formula (I) or (II).... | 10/17/2000 |
| 6120959 | Black toner for developing electrostatic latent image A black toner for developing electrostatic latent images having colored particles and external additive(s) and the colored particles containing at least a binder resin, carbon black, a cyan pigment, a magenta pigment, and a yellow pigment. The concentrati... | 09/19/2000 |
| 6096465 | Toner for developing electrostatic latent image, method for manufacturing the same, developer and method for forming image A toner composed of binder resin and carbon black particles has a volume-average particle diameter (D50) of 2.0 to 9.0 microns and a volume-average particle size distribution index (GSDv) of 1.25 or less. Carbon black particles adhering to the ... | 08/01/2000 |
| 6030737 | Non-magnetic toner for developing electrostatic image, process for producing non-magnetic toner particles, and image forming method A non-magnetic toner for developing an electrostatic image has non-magnetic toner particles produced by polymerizing in an aqueous medium a polymerizable monomer composition containing at least a polymerizable monomer, a carbon black and an azo type iron ... | 02/29/2000 |
| 6025103 | Highly pure material for electrophotographic printing, and method of manufacturing such highly pure material Toner magnetic powder which uses a resin as a binder and contains a dye is coated by a methyl methacrylate resin, thereby forming a carrier. A developer is formed by such a carrier in which those two components are mixed. An electric conductivity of the i... | 02/15/2000 |
| 5976755 | Image forming method featuring a residual charge control property resulting from a selected toner formulation An image forming method includes charging an image carrier for carrying an electrostatic latent image; forming an electrostatic latent image on the charged image carrier; developing the electrostatic latent image with a toner by contacting a toner layer on a s... | 11/02/1999 |
| 5955232 | Toners containing positively chargeable modified pigments A toner composition is disclosed which contains modified pigment particles having attached organic groups and styrenic polymer-based resin particles. The organic groups which are attached to the pigment particles are positively chargeable. Developer compo... | 09/21/1999 |
| 5932386 | Non-contact hot fusing toner Toner for use in a non-contact heat fusing apparatus. Toner includes a binder resin, a colorant and acicular particles of wax. In a preferred embodiment, the toner includes a carbon black graft polymer obtained by reacting carbon black and a polymer which... | 08/03/1999 |
| 5929139 | Method for production of microfine colored particles and electrophotographic toner, using the particles A method for the recovery of microfine suspended particles from a suspension medium, characterized by subjecting a polymeric monomer suspended in a suspension medium to suspension polymerization thereby forming microfine globular particles in the suspensi... | 07/27/1999 |
| 5884129 | Electrostatic-image developer and image forming process An electrostatic-image developer which comprises: (i) a toner comprising: (a) toner particles containing carbon black in an amount of from 6 to 8% by weight based on the weight of the toner particles and having a volume-average particle diameter of from 3... | 03/16/1999 |
| 5853940 | Toner for developing electrostatic latent image The present invention relates to a toner comprising a specific binder resin, a specific polyethylene wax and a specific polypropylene wax. The present invention further relates to a toner which comprises a binder resin including a specific first resin and... | 12/29/1998 |
| 5851717 | Developer for use in electrophotography, and image formation method using the same A developer for use in electrophotography for developing latent electrostatic images to visible toner images, includes at least two kinds of toner particles with different shapes selected from the group consisting of spherical toner particles, fibrous ton... | 12/22/1998 |
| 5804350 | Negatively chargeable toner for developing electrostatic latent image The present invention relates to a negatively chargeable toner comprising at least a binder resin, carbon black, and charge controller, wherein said charge controller is a colorless or white in color boron compound, and wherein a melt viscosity curve of s... | 09/08/1998 |
| 5804347 | Electrophotographic toner and contact development method using the toner This invention provides an electrophotographic toner comprising the polyester resin being fixing resin and the electric charge control resin having the functional group that endows positively charging property to the toner, in which the polyester resin ha... | 09/08/1998 |
| 5804349 | Acrylonitrile-modified toner compositions and processes A toner comprised of pigment, and an addition polymer resin generated from about 55 to about 80 weight percent of styrene, from about 1 to about 25 weight percent of acrylate, from about 1 to about 20 weight percent of acrylonitrile, and from about 0.5 to... | 09/08/1998 |
| 5759728 | Black toner for developing electrostatic latent images with carbon black dispersed in specific distribution The present invention relates to a black toner for developing electrostatic latent images, comprising at least a binder resin and carbon black, characterized in that a mean primary particles size and particle size distribution of the carbon black disperse... | 06/02/1998 |
| 5738966 | Non-magnetic one-component developer and image forming process A negatively electrifiable, non-magnetic and single component developer comprising a binder resin, a carbon black and a charge control agent, wherein the carbon black has an average primary particle diameter of 20 to 50 nm and a pH of 2 to 5, and the char... | 04/14/1998 |
| 5667927 | Toner for electrophotography and process for the production thereof A biodegradable or hydrolyzable toner for electrophotography, which permits the easy reclaiming and recycling of used copying paper, permits the easy deinking by an existing deinking system, can decrease environmental pollution caused by a toner waste, an... | 09/16/1997 |
| 5645967 | Charge controlling agent composition and toner containing said composition The present invention relates to a toner for electrophotography, and an object of the present invention is to improve various characteristics of the toner for electrophotography. A charge controlling agent composition obtained either by adding carbon ther... | 07/08/1997 |
| 5633108 | Monocomponent resistive toner for field charging A toner composition for developing an electrostatic latent image comprising a base toner, which is a blend of a polymeric resin and a colorant, and one or more of a lubricating agent, a flowability agent, a charge-stabilizing agent, and a conductive agent... | 05/27/1997 |
| 5620820 | Four color toner set Toners comprised of a mixture of a cyan toner, a magenta toner, a yellow toner, and a black toner each of said toners being comprised of resin and pigment, and wherein the pigment for the cyan toner is a ଲ type copper phthalocyanine, the pigment for... | 04/15/1997 |
| 5620823 | Developing agent for electrophotography and developing method A developing agent for electrophotography which comprises toner particles containing a resin binder and a colorant. The toner particles include which have diameter of 5 μm or less and which account for less than 10% by number of all particles, and includ... | 04/15/1997 |
| 5620824 | Toner, developer and image forming method A toner for developing an electrostatic image has colored resin particles-(A) containing a coloring agent or a magnetic powder, and a powdery additive. The powdery additive has organic resin particles-(B) having peaks respectively in a region of particles... | 04/15/1997 |
| 5607804 | Combination, set, or gamut toners Toners comprised of a mixture of a cyan toner, a magenta toner, a yellow toner, and an optional black toner, each of said toners being comprised of resin and pigment, and wherein the pigment for the cyan toner is a ଲ type copper phthalocyanine, the ... | 03/04/1997 |
| 5604066 | Toner compositions with organometallic polymers A toner composition comprised of pigment, and a metallocene polymer. Also illustrated is a toner composition wherein the metallocene polymer is a metallocene polyester of the formula ##STR1## wherein R and R' are an alkylene or an arylene; M is the m... | 02/18/1997 |
| 5585215 | Toner compositions A toner comprised of color pigment and an addition polymer resin, and wherein said resin is generated by emulsion polymerization of from 70 to 85 weight percent of styrene, from about 5 to about 20 weight percent of isoprene, from about 1 to about 15 weig... | 12/17/1996 |
| 5559168 | Method for production of microfine colored particles and electrophotographic toner using the particles A method for the production of microfine colored particles, characterized by subjecting a polymeric monomer suspended in a suspension medium to suspension polymerization in the presence of a coloring agent and/or a magnetic powder thereby forming microfin... | 09/24/1996 |
| 5516614 | Insulative magnetic brush developer compositions An insulating developer composition comprised of resin particles, pigment particles, wax component particles, compatibilizer, and a surface additive mixture comprised of metal salts of fatty acids, silica particles, and metal oxide particles; and carrier ... | 05/14/1996 |
