Patent application number | Description | Published |
20100081074 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, DEVELOPER FOR DEVELOPING ELECTROSTATIC IMAGE, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A toner for developing an electrostatic image includes a toner particle to which particles of an external additive A having a number average particle diameter of from 7 nm to 200 nm and particles of an external additive B having a number average particle diameter of from 30 nm to 4000 nm have been externally added. The ratio of the number average particle diameter of the particles of the external additive B to the number average particle diameter of the particles of the external additive A is in a range of from 2 to 20. The particles of one of the external additive A or the external additive B are particles having a core material covered with an organic material containing hydrogen and nitrogen. The particles of the other one of the external additive A or the external additive B are SiO | 04-01-2010 |
20100248110 | TONER FOR ELECTROSTATIC IMAGE DEVELOPMENT, TONER CARTRIDGE, PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS - The invention provides a toner for electrostatic image development, containing a toner particle and external additive particles adhered to the surface of the toner particle, each of the external additive particles being constituted of plural irreversibly coalesced primary particles. | 09-30-2010 |
20110236052 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, CLEANING APPARATUS, AND CLEANING METHOD - An image forming apparatus includes a member to be cleaned and a cleaning roller driven by contact with the member to be cleaned, and the apparatus is configured such that abrasive grains and at least one of a release agent and a solid lubricant are supplied to the member to be cleaned and that the supplied abrasive grains and the supplied at least one of a release agent and a solid lubricant move on a surface of the member to be cleaned in an axial direction of the cleaning roller. | 09-29-2011 |
20120122026 | DEVELOPER FOR ELECTROSTATIC PHOTOGRAPHY, PROCESS CARTRIDGE FOR IMAGE FORMING APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A developer for electrostatic photography, includes: a toner containing toner particles containing a colorant and a binder resin, and an external additive having a number average particle diameter of about 100 nm or more and about 800 nm or less; and rugged particles having a rate of ruggedness represented by formula (1) of about 30% or more and about 70% or less: | 05-17-2012 |
20120251936 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, METHOD OF PRODUCING TONER, CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - A toner for developing an electrostatic image, includes: colored particles containing a colorant and a binder resin, and two or more kinds of inorganic particles that are externally added to a surface of the colored particles, in which the two or more kinds of inorganic particles contain titanium-containing particles and silica-containing particles, an exposure ratio of the surface of the colored particles is about 25% or less, and a ratio of the titanium-containing particles that are in contact with the colored particles is about 15% by number or less. | 10-04-2012 |
20120251937 | TONER FOR DEVELOPING ELECTROSTATIC IMAGE, METHOD OF PRODUCING TONER, CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS - A toner for developing an electrostatic image, includes: colored particles containing a colorant and a binder resin, and two or more kinds of inorganic particles that are externally added to a surface of the colored particles, in which the two or more kinds of inorganic particles contain titanium-containing particles and silica-containing particles, an exposure ratio of the surface of the colored particles is about 25% or less, and a ratio of the silica-containing particles that are in contact with the colored particles is about 10% by number or less. | 10-04-2012 |
20130216793 | TRANSPARENT TONER AND TONER IMAGE USING THE SAME, ELECTROSTATIC LATENT IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A transparent toner for developing an electrostatic latent image includes toner particles containing a binder resin; and an external additive containing cerium oxide, in which a content of cerium in all toner particles is from 0.05% by weight to 0.20% by weight, the cerium oxide contains a praseodymium, and a content of praseodymium in all toner particles is from 0.001% by weight to 0.050% by weight. | 08-22-2013 |
20130224640 | TRANSPARENT TONER AND TONER IMAGE USING THE SAME, ELECTROSTATIC LATENT IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD - A transparent toner for developing an electrostatic latent image includes toner particles containing a binder resin; and an external additive containing cerium oxide, in which the content of cerium in all toner particles is in the range of 0.05% by weight to 0.20% by weight, and the cerium oxide contains neodymium and the content of neodymium in all toner particles is in the range of 0.001% by weight to 0.015% by weight. | 08-29-2013 |
20140255839 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE - An electrostatic charge image developing toner includes a binder resin and a release agent, and when a peak temperature during a first temperature increase and a peak temperature during a second temperature increase, that are obtained by differential scanning calorimetry including performing the first temperature increase at 10° C./min after holding at 10° C., performing cooling at −10° C./min, performing a heat treatment for 24 hours at 50° C., and performing the second temperature increase at 10° C./min, are represented by Tt1 and Tt2 | 09-11-2014 |
20140287352 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - An electrostatic charge image developing toner includes toner particles, and an external additive containing titanate compound particles having an iron content of from greater than 1200 ppm to 6000 ppm. | 09-25-2014 |
20140287353 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE - An electrostatic charge image developing toner includes an amorphous polyester resin and a crystalline polyester resin as a binder resin, and by differential scanning calorimetry, which undergoes processes of a first temperature rise, cooling at a rate of −10° C./min and a second temperature rise, an endothermic peak (1) derived from a resin in which at least the amorphous polyester resin and the crystalline polyester resin are compatible is present in the first temperature rise, an exothermic peak having an intensity of 0.1 J/g or more is not present during the first temperature rise, and at least one exothermic peak (2) is present in a temperature range which is lower than that of the endothermic peak (1) by from 5° C. to 15° C. during the second temperature rise. | 09-25-2014 |
20150044601 | ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE - An electrostatic charge image developing toner includes toner particles containing a binder resin containing a polyester resin forming a sea part and a vinyl resin forming an island part of a sea-island structure, a first release agent existing in the sea part in a domain state, and a second release agent existing in the island part in a domain state, wherein when a cross-sectional area of the second release agent is set to A1 and a cross-sectional area of the first release agent is set to B1 in a cross section of the toner particles, a relationship of 0.2≦A1/B1≦0.8 is satisfied. | 02-12-2015 |