36results about How to "Reduce electrification" patented technology

An image forming apparatus having excellent chargeability, sensitivity and light responsivity of an electrophotographic photoconductor and capable of forming images of high quality and high resolution at a high speed in various circumstances, is provided. An electrophotographic photoconductor having a photosensitive layer containing the enamine compound represented by the following general formula (1), for example, the enamine compound represented by the following structural formula (1-1) as a charge transportation substance is mounted to an image forming apparatus and the volume average particle size of the toner contained in a developer 50 housed in a developing device 33 is set to a size from 4 to 7 mu.

The present invention provides an intermediate transfer belt, wherein: the intermediate transfer belt is made from a resin material comprising a carbon black in a dispersed state; an absolute value of a difference between a common logarithm value of surface resistivity 10 seconds after voltage application and a common logarithm value of the surface resistivity 30 milliseconds after voltage application is about 0.2 ((Log Ω / □) or less; and a Young's modulus thereof is about 3,500 MPa or more. The intermediate transfer belt is preferably formed by a process comprising: dispersing the carbon black in a polyamide acid solution to prepare a dispersant; developing the dispersant in a ring-like shape to form a developing layer; drying the developing layer to make a film to mold into a belt shape to form a molded article; and heat-treating the molded article to convert polyamide acid into imide.

A developing apparatus is provided in which a replenishment developer when replenished has been electrified to a sufficient extent and can immediately produce an effect of replenishment, with a small consumption of a carrier. In an developing apparatus 100 of the present invention, by means of a first and a second agitation and conveyance screw 21, 22 arranged in an upper space 13 and a lower space 14, respectively, a first two-component developer LT stored in the spaces is agitated and conveyed, so that it is supplied to a developing roller 20 so as to perform development processing of an electrostatic latent image on a photosensitive member. This developing apparatus replenishes a second two-component developer HT stored in a cartridge 30 into a first two-component developer LT in the spaces in an appropriate manner in accordance with the progress of the development process, so that a component composition of the first two-component developer can be kept within a prescribed range. In this case, amounts of electrification Q1, Q2 of the first and second two-component developers are set to be Q2=Q1×A (A=0.6−1.5) when the second two-component developer is readjusted to the same state of its toner concentration as that of the first two-component developer.

An air filter filter material (1), comprising a substrate layer (2) and a chargeable fine fiber layer (3), the fine fiber layer (3) comprising a hindered phenolic light stabilizer and benzotri Polymer material of azole light stabilizer. The volume resistivity of polymer materials is 10 16 Ωcm or more, and the dielectric loss tangent value of the polymer material is 0.001 or less. When X is the weight of the hindered phenol-based light stabilizer and Y is the weight of the benzotriazole-based light stabilizer, the relationship of 0<(Y / X)≦1.25 is satisfied.

PROBLEM TO BE SOLVED: To easily reduce or prevent electrostatic charge. SOLUTION: A motor includes a cover member 14 formed by a conductive material, a bearing part, a shaft, a rotor magnet rotating with the shaft, an annular stator facing the rotor magnet in the radial direction in the cover member, a circuit board 32 arranged perpendicular to a central axis J1 in the cover member, and an electric power line 431 and a ground line 432 connecting to the circuit board. The circuit board includes a conductive pattern 41 and an electronic component mounted on the conductive pattern, and the conductive pattern includes a driving circuit pattern 411 supplying electric power from the electric power line to the stator, a ground pattern 412 to which the ground line is connected, and a cover antistatic pattern 413 which is located closer to the cover member than the driving circuit pattern and the ground pattern or contacts with the cover member. The circuit board includes a resistance electrically connecting the ground pattern with the cover antistatic pattern. COPYRIGHT: (C)2012,JPO&INPIT

The present invention relates to an image forming apparatus including a plurality of image forming units, an intermediate transfer belt having an elastic layer, a plurality of primary transfer members, a proximity and separation mechanism, a secondary transfer member, a driving device, and a voltage applying device. and control department. The close-to-separation mechanism can switch between a full-color pressing state and a full-color separation state, wherein, the full-color pressing state is that all the primary transfer members are pressure-bonded to the image carrier through an intermediate transfer belt; the full-color separation state is It is to separate all the primary transfer members from the intermediate transfer belt. The control unit can execute the friction coefficient reduction mode after the image carrier and the intermediate transfer belt are driven from the full-color separation state to the full-color pressing state when the power is turned on for the first time. , the toner is discharged from the developing device to the image carrier to reduce the surface friction coefficient of the image carrier and the intermediate transfer belt.

The invention provided a development roller development device, image forming apparatus, and method of manufacturing development roller can realize well development for a long time by inhibiting reduce of the depth of the convex-concave part after forming images for a long time. The development roller at least comprises a base unit (25a) a base recess (29a',29b') and a base projection (30') that are formed in a predetermined area of a circumference surface of the base unit; and a surface layer (25b) formed on the circumference surface of the base unit (25a) and having a recess (29a,29b) and aprojection (30). The surface hardness of the projection (30) is larger that the surface hardness of the recess (29a,29b).

A rubbing cloth used for rubbing to control the alignment of liquid crystal molecules. The rubbing cloth comprises; the pile portion containing fibers comprising a cellulose acetate. The fibers comprising a cellulose acetate may be textured filament yarns provided with crimps. The cellulose acetate may have an acetylation degree of 45% or more. The rubbing cloth can have properties of great alignment force, low frictional electrification, and high wear resistance together.

The invention discloses a comprehensive test platform and a test method for transformer oil-paper insulation materials, including a main oil tank and an oil conservator; the middle parts of the left and right side plates of the main oil tank are respectively provided with oil flow valves facing each other, and the bottom is provided with oil filling and discharging valves; The oil conservator is a vertical cylinder, which is arranged above the side of the main oil tank, and its bottom is connected to the top of the main oil tank through a connecting pipe, and a pressure valve is arranged on the top, and a piston pad is arranged inside to isolate the oil surface and the air. A limit ring is arranged under the piston pad, and an air extraction valve is arranged at the limit ring. The invention can apply pressure to the oil through the oil conservator with piston structure, so as to study various electrical properties of the oil paper under different pressures; at the same time, it can also control the oil flow velocity in the box through the oil flow valve and an external oil pump, so as to study the effect of the flow velocity on the oil paper. The influence of electrical properties; By connecting the implanted heating device, the influence of temperature on the electrical properties of oil-paper was studied.