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Electrophotography > Image Formation > Development > Dry Development

Dry Development

Dry Development patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

05/22/14 - 20140140731 - Toner, developer, image forming apparatus and image forming method
A toner including: a binder resin; a releasing agent; and a colorant, wherein the binder resin contains a crystalline polyester resin and a non-crystalline polyester resin, wherein the releasing agent has an endothermic peak temperature of 60° C. to 80° C. at the second temperature rising in differential scanning calorimetry,...

03/27/14 - 20140086638 - Developing device
A developing device includes: a developing frame having an opening; a developing roller that is arranged to the opening and is configured to carry developer; a supply roller configured to supply the developer to the developing roller, and a layer thickness regulation member configured to regulate a layer thickness of...

03/06/14 - 20140064792 - Developing unit and electrophotographic image forming apparatus
Provided are a developing unit alleviating fogging occurrence and an electrophotographic image forming apparatus providing images over long periods. The developing unit comprises at least toner (1), developing roller (2). (1) when a displacement amount when a load is applied at Y° C. and 9.8×10−5 N/sec to 2.94×10−4 N is...

02/06/14 - 20140037338 - Toner print with efficiently enhanced gamut
Toner prints with efficiently enhanced gamut are provided. In one aspect a toner print comprises a receiver and a toner image fused to the receiver. The toner image has a first area with a first density at a first hue angle formed by a first amount of a fluorescent toner...

09/19/13 - 20130243488 - Toner, two-component developer, and image forming apparatus
where, in a distribution diagram where particle diameters in nm of the coalesced particles are on horizontal axis and cumulative percentages in % by number of the coalesced particles are on vertical axis and in which the coalesced particles are accumulated from those having smaller particle diameters to those having...

06/27/13 - 20130164038 - Developing member and production method therefor, and electrophotographic image forming apparatus
Provided is a developing member capable of suppressing occurrence of compression set. The developing member comprises a substrate; an elastic layer provided on the substrate; and a coating layer provided on the elastic layer, wherein the elastic layer contains a cured substance of a mixture containing the following (A) to...

02/28/13 - 20130051859 - Developer carrying member, method for its production, and developing assembly
A developer carrying member having less environmental dependence is provided. The developer carrying member has a substrate and a resin layer, which resin layer contains an acrylic resin; the acrylic resin having a unit (1) represented by the following formula (1) and a unit (2) represented by the following formula...

01/24/13 - 20130022371 - Toner for electrostatic charge development
(where T1 is temperature (° C.) at which storage elastic modulus G′(r1) is 1×105 (dyne/cm2) and T2 is temperature (° C.) at which storage elastic modulus G′(r2) is 1×103 (dyne/cm2) as measured by means of a viscoelasticity measuring device with measuring frequency of 1 Hz, and measuring distortion of 1...

09/20/12 - 20120237267 - Electrostatic image developing toner, developer, and image forming apparatus
An electrostatic image developing toner including: toner particles each containing binder resin and colorant; and an external additive supported on the toner particles, wherein the toner particles each have protrusions on surface thereof, average of lengths of long sides of the protrusions is 0.10 μm or more but less than...

04/12/12 - 20120087698 - Developer, development device, and image formation apparatus
A developer includes a binder resin, a carbon black, and a black charge control agent. When an amount of the binder resin is 100 parts by weight, a blending quantity of the carbon black is set in a range of 3.0 to 7.0 parts by weight, both inclusive, and a...

11/10/11 - 20110274467 - Developer carrying member, and developing apparatus using same
The present invention relates to a developer carrying member which includes a substrate and the resin layer formed on the surface of the substrate, wherein the resin layer is obtained by thermally curing the coating material composition including at least the following (A) to (E): (A) a thermosetting resin as...

11/03/11 - 20110268477 - Developer carrying member, method for manufacturing same and developing apparatus
The present invention provides a developer carrying member capable of maintaining excellent charge imparting property even under long-term use. The present invention relates to a developer carrying member including a substrate and a resin layer, wherein the resin layer includes an acrylic resin having three specific structural units and electroconductive...

10/06/11 - 20110243612 - Image forming apparatus capable of effectively developing images
An image forming apparatus, a process cartridge, and a developing unit includes a developer carrying member to carry developer, first and second rotary members arranged in parallel to each other and configured to rotate to agitate and convey the developer, and an enclosure having an inside space to contain the...

07/21/11 - 20110176835 - Toner bearing member, development device, and image forming apparatus
where R1 and R2, each, independently represent a hydrogen atom, an alkyl group, or an aryl group, or form a cyclic hydrocarbon residual group having 5 to 8 carbon atoms, R3 and R4, each, independently represent a hydrogen atom, a halogen atom, an alkyl group, or an aryl group, and...

07/07/11 - 20110164901 - Toner and method for producing the same
A toner containing core particles each containing at least a resin A having a polyester skeleton and a colorant; and vinyl resin fine particles each of which encapsulates a resin B having at least a polyester skeleton and an endothermic peak measured by differential scanning calorimeter (DSC) at 40° C....

05/19/11 - 20110116841 - Toner having multiple inflection points on storage modulus curve with respect to temperature and method of preparing the same
Provided are a toner and a method of preparing the same. The toner includes a binder resin, a coloring agent, and at least one additive, and a storage modulus curve of the toner with respect to temperature has multiple inflection points. The toner may be used in an electrophotographic image...

05/05/11 - 20110103841 - Developer, developer cartridge, developing unit, and image forming apparatus
A developer contains a resin, a coloring agent, and an external additive in an amount of 2.5 to 4.5 weight parts added to the resin in an amount of 100 weight parts resin. The developer has an average volume mean particle diameter in the range of 4.5 to 6.5 μm...

03/24/11 - 20110069992 - Method of manufacturing toner particles, toner particles, two-component developer, developing device and image forming apparatus
A method of manufacturing toner particles capable of decreasing the manufacturing costs by simplifying the manufacturing apparatus and by decreasing the number of the steps, as well as to provide toner particles, a two-component developer, a developing apparatus and an image forming apparatus are provided. A high-pressure homogenizer is constituted...

02/10/11 - 20110033207 - Toner using resin being insoluble in organic solvents and method for preparing the same
A toner using an organic solvent-insoluble resin and a method of preparing the same. The toner includes: a binder resin that comprises an organic solvent-insoluble resin and an acid group-containing resin, a coloring agent, and at least one additive, wherein the organic solvent-insoluble resin is a crosslinked polyester resin or...

12/02/10 - 20100303506 - Method of manufacturing resin-layer coated carrier, resin-layer coated carrier, developer, developing device, and image forming apparatus
A manufacturing apparatus provided with a rotary stirring section and a powder passage is used to manufacture the resin-layer coated carrier. At a fine resin particle adhering step, a magnetic base particle and a fine resin particle are inputted into the powder passage with the rotary stirring section rotating and...

09/16/10 - 20100232837 - Toner having core-shell structure and method of preparing the same
A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction...

08/19/10 - 20100209145 - Capsule toner, two-component developer, and image forming apparatus
A capsule toner capable of enhancing low temperature fixation property without impairing preservation property under a high temperature environment, a two-component developer, and an image forming apparatus are provided. The capsule toner is constituted of toner particles having toner base particles and a coating layer for coating the surface thereof....

08/12/10 - 20100202801 - Developer carrying member and developing apparatus
A developer carrying member is disclosed which can stably provide toners with triboelectric charges even in various environments. The developer carrying member has a substrate and a resin layer as a surface layer formed on the surface of the substrate, and the resin layer contains a thermosetting resin as a...

07/29/10 - 20100189468 - Developing device and image forming device
A developing device includes a developing member for developing an electrostatic latent image by adhering developer on an image carrier; a feeding member for feeding the developer to the developing member; and an interposing member that is interposed between the developing member and the feeding member during a period of...

07/22/10 - 20100183340 - Resin coated carrier, two-component developer, developing device and image forming apparatus
in which A is a volume resistance (Ω/cm) under electric field of 1,000 V/cm obtained by conducting a stirring test, and B is a volume resistance (Ω/cm) under electric field of 1,000 V/cm before the stirring test....

06/10/10 - 20100142999 - Toner, two-component developer, developing device, fixing device, and image forming apparatus
The present invention realizes: a toner that ensures fixing property only by a laser fixing system where a toner is fixed by irradiation of laser light whose wavelength is adjusted to be in an absorption wavelength range of each color of the toner, and realizes an image without poor color...

05/20/10 - 20100124441 - Toner and method of manufacturing the same, two-component developer, developing device and image forming apparatus
A toner containing a lignin resin, a carbon-neutral biomass polymer having a low environmental load and taking global environmental protection into account, as a constitutional component of a binder resin, and having a wide fixing non-offset range and an excellent fixing property, is provided. The toner contains at least a...

05/06/10 - 20100111570 - Method for forming image and image forming apparatus having a developing agent with a distribution of adhesive force to a surface of an image carrier
The developing agent is selected to have a distribution of adhesive force to the surface of an image carrier, which is configured such that the ratio of the developing agent having an adhesive force which is not less than 2.5 times as high as an average value of a distribution...

04/29/10 - 20100104323 - Toner, developer, developing device and image forming apparatus
A toner is provided. The toner includes toner particles, and silica particles and inorganic fine particles that are externally added to the toner particles, the inorganic fine particles having an average primary particle size smaller than that of the silica particles. The toner particles have a shape factor SF-1 of...

04/29/10 - 20100104324 - Method for manufacturing resin-layer coated toner, resin-layer coated toner, developer, developing apparatus and image forming apparatus
0 atm<(Pressure P1 in the powder passage−Pressure P0 outside the powder passage)≦0.3 atm  (1)....

04/22/10 - 20100098462 - Method of preparing toner using micro-suspension particles and toner prepared using the method digital image data
A method of preparing a toner using a micro-suspension particle, includes preparing a mixture by mixing a resin having acidic groups, a master batch of coloring pigment, and at least one additive with an organic solvent, and then neutralizing the acid groups of the resin with a base; forming a...

04/01/10 - 20100080629 - Method for manufacturing toner, toner, developer, developing apparatus, and image forming apparatus
A method for manufacturing a toner is provided. In a fine resin particle adhering step S1b, fine resin particles adhere to toner base particle surfaces in a powder passage. In a spraying step S3c, flowing toner base particles and fine resin particles are sprayed with a substance in liquid form...

03/11/10 - 20100061767 - Method for manufacturing toner, toner, developer, developing device and image forming apparatus
A method for manufacturing a toner is provided. The method for manufacturing a toner uses a rotary stirring apparatus. The rotary stirring apparatus includes at least a circulation section, a temperature regulation section and a spraying section composed of a two-fluid nozzle. The two-fluid nozzle includes a liquid pipe and...

01/28/10 - 20100021209 - Toner, developer, and image forming apparatus
A toner produced by dissolving or dispersing toner components comprising a binder resin, a colorant, and a charge controlling agent in an organic solvent to prepare a toner components liquid, forming liquid droplets of the toner components liquid in a gas phase, and solidifying the liquid droplets into toner particles...

01/28/10 - 20100021210 - Method of manufacturing coalesced resin particles, coalesced resin particles, toner, two-component developer, developing device, and image forming apparatus
There is provided a method of manufacturing coalesced resin particles for obtaining coalesced resin particles by coalescing aggregated resin particles in a grain boundary-free state in a short period of time while keeping a grain size distribution within a narrow range. In a coalescence process, a slurry of aggregated resin...

12/03/09 - 20090297224 - Method for manufacturing toner, toner, developer, developing device, and image forming apparatus
A method for manufacturing a toner is provided. The method for manufacturing a toner uses a rotary stirring apparatus that includes a circulating section for repeatedly performing circulation in a powder passage having a rotary stirring chamber and a circulation tube to return to the rotary stirring chamber by a...

12/03/09 - 20090297225 - Toner, developer, developing device, and image forming apparatus
A toner whose flowability, chargeability and fixing property are enhanced, a developer, a developing device and an image forming apparatus are provided. The toner comprises a toner particle in which a shell layer is formed on a surface of a core particle, and external additive, where (1) the shell layer...

10/01/09 - 20090245876 - Electrophotographic toner and image forming apparatus
According to an embodiment of the invention, an electrophotographic toner contains 100 parts by weight of a toner resin, from 0.01 to 10 parts by weight of a cyclodextrin compound, first silica having an average particle diameter of from 20 to 40 nm, and second silica having an average particle...

09/17/09 - 20090232557 - Toner, method of manufacturing toner, developer, two-component developer, developing device, and image forming apparatus
The toner includes a plurality of toner particles containing a binder resin and a colorant. In toner particles, according to measurement by a flow particle image analyzer, the content of small size particles having a circle-equivalent diameter of 0.5 to 2.0 μm is 5% by number or less based on...

09/10/09 - 20090226218 - Carrier, two-component developer using the same, and image-forming apparatus using said developer
The present invention provides a carrier for a two-component electrophotographic developer, comprising a core particle and a thermoset silicone resin layer coated thereon, wherein said layer comprises a charge control agent and is formed by heat-treatment at a temperature below the melting point of said charge control agent....

08/27/09 - 20090214264 - Toner, method of manufacturing toner, developer, two-component developer, developing device, and image forming apparatus
A toner, a developer, a two-component developer, a developing device and an image forming apparatus are provided. In the image forming apparatus, images are formed with a developer that fills a developing tank of the developing device. The developer includes the toner containing at least a binder resin, a colorant,...

08/06/09 - 20090196658 - Toner, developer, image forming method, image forming apparatus and process cartridge
A toner having a weight-average particle diameter of from 2 to 7 μm and a circularity of from 0.95 to 1.00, including a colorant; a binder resin; and at least one oxidized particulate material, comprising a silicon element, wherein the oxidized particulate material has a number-average particle diameter (Dn) of...

07/30/09 - 20090190959 - Developer and image forming apparatus
A developer including a toner containing the cylindrical toner particles obtained by melting toner raw materials including binder resins, pigments, and waxes, forming a fibrous intermediate from the melted toner raw materials and cutting the fibrous intermediate, wherein the cylindrical toner particles have a ratio (L/D) of the cylindrical length...

07/16/09 - 20090180809 - Toner and producing method thereof, developer, two-component developer, developing device and image forming apparatus
A toner is so configured as to satisfy the following conditions: (b)/(a) is from 0.90 to 1.02, (a) is from 140 to 150 and the average value in the entire toner particles of a shape factor SF-2 of the toner particles is larger than 140, where (a) represents a shape...

07/16/09 - 20090180810 - Image forming apparatus
In the image forming apparatus by: visualizing an electrostatic latent image formed on an electrostatic charge carrying member; transferring a toner image, which is thus visualized, to a recording medium, or to a recording medium through an intermediate transfer material; and fixing the toner image, which is thus transferred to...

07/09/09 - 20090175658 - Image forming apparatus, image forming method, and process cartridge
To provide an image forming apparatus including: a latent electrostatic image bearing member; a charging unit configured to charge the surface of the latent electrostatic image bearing member; an exposing unit configured to expose the charged surface of the latent electrostatic image to form a latent electrostatic image thereon; a...

06/11/09 - 20090148191 - Color toner, developer, developing device, and image forming apparatus
A color toner, a developer, a developing device for performing development by using the developer and an image forming apparatus having the developing device are provided. A developer, which contains a color toner formed by adding zinc oxide particles externally to the surfaces of toner base particles containing binder resin...

04/23/09 - 20090103950 - Toner, image forming apparatus, image forming method, and process cartridge
An image forming apparatus including: a latent electrostatic image bearing member, a charging unit, an exposing unit, a developing unit, a transfer unit, and a fixing unit, wherein the toner contains at least a binder resin and a colorant, the binder resin contains a polyester resin obtained by polycondensation of...

03/19/09 - 20090074466 - Developing unit and image forming apparatus having the same
A developing unit capable of dispersing a pressure of developer used therein includes a developer housing to contain the developer and a blocking member to divide the developer housing into a first section and a second section, the second section including a developing member disposed therein to transfer the developer...

03/19/09 - 20090074467 - Image forming apparatus and image forming method
An image forming apparatus including an image bearing member to bear a latent electrostatic image, a charging device to charge the image bearing member, an irradiating device to irradiate the image bearing member with light to form the latent electrostatic image, a developing device to develop the latent electrostatic image...

02/19/09 - 20090047043 - Image-forming method, magnetic toner, and process unit
An image-forming method is provided which can provide stable image density irrespective of use environments and does not cause image defects such as fogging, tailing, or transfer voids, even when being applied to a developing sleeve with a reduced diameter. In the image-forming method, a latent image bearing member and...