46results about How to "Fog suppression" patented technology

An image forming apparatus having an image bearing member rotatable with an electrostatic image borne thereon, a developer carrying member rotated with a developer carried thereon and conveying the developer to a developing portion to effect the development of the electrostatic image, and an image bearing member speed controlling device capable of switching the rotating speed of the image bearing member between a first speed and a second speed lower than the first speed, and performing an image forming operation, the rotating speed of the developer carrying member is controlled so that the rotating speed of the developer carrying member when the image forming operation is performed at the second speed controlled so as to be less than 70% of the first speed may be within a range of ±30% of the rotating speed of the developer carrying member when the image forming operation is performed at the first speed.

The present invention provides a developing apparatus including a toner, a toner carrying member and a regulating member, wherein the toner is a magnetic toner including a toner particle, a first fine silica particle having a number average primary particle diameter of 5 to 20 nm and a second fine silica particle having a number average primary particle diameter of 40 to 200 nm, the second fine silica particle is a fine silica particle produced by a sol-gel method, the toner has a total energy of 270 to 355 mJ / (g / ml), the toner carrying member has a substrate, an elastic layer and a surface layer including a urethane resin, and the urethane resin has a partial structure derived from a reaction of a particular amine type compound with a polyisocyanate.

A magnetic toner having magnetic toner particles each containing at least a binder resin and a magnetic iron oxide particle, in which: when a solution is prepared by dissolving the magnetic iron oxide particles in an acidic aqueous solution and an Fe element amount in a solution in which all the magnetic iron oxide particles are dissolved is defined as a total Fe element amount, a ratio X of the amount of Fe(2+) in a solution in which the magnetic iron oxide particles are dissolved to a state where 10 mass % of the total Fe element amount is present in the solution (solution having an Fe element-dissolving ratio of 10 mass %) to an Fe element amount in the solution having a specific Fe element-dissolving ratio; and the dielectric loss tangents of the magnetic toner measured at a temperature of 40° C. satisfy specific conditions.

An image forming apparatus includes a rotatable image bearing member bearing an electrostatic image; a rotatable developer carrying member carrying a developer to develop the electrostatic image; speed controlling means for switching a rotating speed of the image bearing member between a first speed and a second speed lower than the first speed, and performing an image forming operation at each speed; and developer carrying member speed controlling means for controlling a rotating speed of the developer carrying member so that a rotating speed of the developer carrying member when the image forming operation is performed by rotating the image bearing member at the second speed, which is less than 70% of the first speed so as to be within a range of ±30% of a rotating speed of the developer carrying member when the image forming operation is performed by rotating the image bearing member at the first speed.

A toner comprising a toner particle containing a binder resin, a colorant, an amorphous polyester, and a crystalline polyester, wherein the binder resin contains a vinyl resin; the amorphous polyester has a monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons, and a monomer unit derived from a dialcohol; the content of the monomer unit derived from a linear aliphatic dicarboxylic acid having 6 to 12 carbons is 10 to 50 mol % with reference to the total monomer units derived from a carboxylic acid in the amorphous polyester; and in a cross section of the toner particle, the vinyl resin constitutes a matrix and the amorphous polyester constitutes domains, and the crystalline polyester is present in the interior of the domains.

Provided is a developing roller including elastic layer and resin layer adhered to each other and having an appropriately resistance, thereby suppressing fogging. The developing member comprises a mandrel; an elastic layer; and a resin layer, wherein: the resin layer comprises polyurethane resin obtained by isocyanate and polyol; and the elastic layer includes cured silicone rubber composition comprising (a)-(d):(a) organopolysiloxane having two or more alkenyl groups bonded to silicon atom and having methyl group as a group other than the alkenyl bonded to the silicon;(b) organopolysiloxane having three or more hydrogen atoms bonded to silicon atom and having methyl group as a group bonded to the silicon;(c) carbon black;(d) organopolysiloxane represented by formula (1) and having Mw of 18,000-110,000 and Mw / Mn of 1.0-2.0 (R1 represents alkenyl group, R2 represents functional group reacting with isocyanate, and n represents an integer of 1 or more).

A vehicle air-conditioner provided with an inside air-conditioning unit introducing at least one of inside air and outside air, adjusting the state of the introduced air, and blowing it out into the vehicle compartment, where an air-conditioning electronic control device judges if window glass is liable to fog up based on a window glass surface relative humidity near the window glass in the compartment (degree of ease of fogging). When it is judged that the window glass is liable to fog up, the inside air-conditioning unit is controlled to prevent the window glass from fogging up in defrost control, while when it is judged that the window glass is resistant to fogging, the inside air-conditioning unit is controlled to introduce at least inside air into the compartment.

An image forming apparatus includes a control unit controlling first and second voltage application mechanisms and shifting a difference Vdif (=Vrs−Vdr) between Vrs and Vdr toward polarity opposite to normal charge polarity of a developer as S decreases, where S is an absolute value of a speed difference between a circumferential speed of an image bearing member, which rotates while bearing an electrostatic latent image and a circumferential speed of a developer bearing member, which rotates at a constant circumferential speed ratio with respect to the image bearing member to develop the electrostatic latent image while bearing the developer, Vdr is a voltage that the first voltage application mechanism applies to the developer bearing member, and Vrs is a voltage that the second voltage application mechanism applies to the developer supply member.

A toner having a toner particle including a core particle obtained by polymerizing a polymerizable monomer composition containing at least a polymerizable monomer, a colorant, a release agent, a polar resin, and a crystalline polyester in an aqueous medium and an outer shell formed by fixing resin fine particles to the surface of the core particle, wherein the resin constituting the resin fine particles is an amorphous resin and the acid value of the resin fine particles is 4.0 to 50.0 mgKOH / g.

A toner comprising toner particles, each of which contains a binder resin, a compound in which a polymer portion is bound to an azo skeleton structure, and a magenta pigment. The azo skeleton structure and a monomer unit of the polymer portion are represented by the following formulas (1) and (2), respectively:

A support frame for pellicle is provided including a first support frame part, a second support frame part, and a filter, wherein the filter has a flat plate-shaped frame shape and is sandwiched by the first support frame part and the second support frame part, the first support frame part includes a first body part having a flat plate-shaped frame shape and a first engaging portion protruded from the first body part to a thickness direction of the support frame for pellicle, and the second support frame part includes a second body part having a flat plate-shaped frame shape and a second engaging portion of the second body part engaging with the first engaging portion being arranged in a concave part provided in the thickness direction of the support frame for pellicle.

When a battery control unit allows use of the electric compressor, an air conditioning control unit performs air-conditioning of a cabin in such a manner that the air conditioning control unit controls the electric compressor to be operated. When the battery control unit prevents use of the electric compressor, the air conditioning control unit controls the electric compressor to be stopped. In addition, the air conditioning control unit heats a windshield in such a manner that the air conditioning control unit controls a window heater to be operated. Accordingly, even when the electric compressor is stopped, fogging of the windshield is suppressed. The air conditioning control unit does not give an excessive feeling of discomfort or unease to a user, because the air conditioning control unit continuously performs a normal air-conditioning control. Fogging of the windshield can be suppressed in a state where power consumption relative to a battery is suppressed.