58 results about "Image density" patented technology

An x-ray apparatus and method can improve x-ray imaging in a variety of ways. For example, the improve x-ray apparatus can reduce scatter from x-ray images acquired by two-dimensional detectors. An improved 2D x-ray apparatus can provide 3D imaging for medical and / or industrial applications. An improved 2D x-ray apparatus and method can produce separate material imaging, and composition analysis for characterization and correlation of image, densitometry, and composition information of individual component or individual material within a single subject. Non-rotational 3D microscopy, combining 2D or 3D full field x-ray imaging and high resolution 2D or 3D x-ray microscopy or spectral absorptiometry and spectroscopy can achieve a higher resolution and wider field of view in x-ray imaging and quantitative analysis in 3D and real time. The x-ray apparatus can improve tracking and / or surgical guidance in time and / or space.

The application discloses a liner paper fixed-point cutting control method and device and electronic equipment. The method comprises the following steps: when a printing instruction is detected, acquiring parameter information of current cigarette production, and identifying a printing pattern on the liner paper; determining a display center of the printing pattern based on image density of each judgment area in the printing pattern; determining a current cutting distance of the liner paper based on the display center and the parameter information, and controlling a cutting object to perform a cutting action based on the current cutting distance. The application can identify the printing image on the liner paper, and determine the current cutting distance at which the cutting object starts to perform the cutting action by determining the display center of the printing pattern, so that no matter what kind of pattern is, the part of the printing pattern on the liner paper which needs to be mainly displayed is in the central part of the cigarette package after packaging according to the cutting trace, and the automatic production demand of the special cigarette is met.

The present invention provides a toner containing colored resin particles of a binder resin and a colorant and an external additive, the binder resin containing a carboxyl group-containing acrylate resin, and the external additive containing carboxyl group-containing acrylate polymer modified metal particles, and a method for preparing the same. By using the specific external additive and the adhesive resin, the prepared toner can still keep stable triboelectrification performance in a high-humidity environment, so that the problems of uneven image concentration and increase of bottom ash are avoided. In addition, the toner has good residual accumulation resistance, residual accumulation on the toner cartridge is reduced, the printing quality is improved, stable printing is still achieved in the high-speed printing process, and good image quality is obtained.

To provide an inkjet ink that achieves both high image density and excellent storage stability. [Solution] The inkjet ink contains a pigment, a pigment-coating resin, a hydrophobic solvent with a LogP of 0.03 to 0.51, and water. In the above inkjet ink, the ratio of the pigment-coating resin content to the pigment content is 8.0% by mass to 12% by mass. In the above inkjet ink, the hydrophobic solvent content is 10% by mass to 30% by mass. In the above inkjet ink, the average particle size of the pigment dispersion composed of the pigment and the pigment-coating resin when diluted 100 times by mass with a mixed solution of 50 parts by mass of the hydrophobic solvent and 50 parts by mass of water is 618 nm or more.

To suppress a decrease in productivity during double-sided printing.SOLUTION: The engine control unit 301 is configured to be able to execute the first operation (S705) when the predetermined condition is not satisfied, and to be able to execute the second operation (S704) when the predetermined condition is satisfied. The predetermined condition includes at least one of an environmental temperature being equal to or higher than a predetermined temperature, a remaining lifetime of the developing device being less than a predetermined value, designation of the second operation by the user, an image concentration of the immediately preceding print being equal to or greater than a predetermined value, an image of the immediately preceding print including a text other than text, and a maximum concentration of a partial region of the immediately preceding print being equal to or greater than a predetermined value (S721 to S723). The toner image formed in the second operation is transferred to the re-conveyed sheet (S704, S707, S708).SELECTED DRAWING: Figure 8

We provide inkjet inks with excellent image density, storage stability, and ejection stability. [Solution] The inkjet ink contains a pigment, a binder resin made of styrene-(meth)acrylic acid copolymer, and a first aqueous medium containing a hydrophobic solvent and water. The inkjet ink has a 30% dry viscosity of 120 mPa·s or more and 3800 mPa·s or less. The inkjet ink has a binder resin content of 0.50% by mass or more and 3.00% by mass or less. The binder resin has a styrene ratio of 20% by mass or more and 40% by mass or less, and a (meth)acrylic acid ratio of 60% by mass or more and 80% by mass or less. The inkjet ink has an HSP distance of 8.0 or more and 12.0 or less between the binder resin and the hydrophobic solvent.

To provide an electrophotographic photoreceptor that is less prone to ghosting and density unevenness in images. [Solution] The outermost layer contains a first resin, a second resin, a charge transport material, and an antioxidant, and at least one of the first resin and the second resin has a constituent unit containing biphenyl represented by formula (BPa), and at least one of the charge transport material and the antioxidant has at least one of biphenyl represented by formula (BPa) and biphenyl represented by formula (BPb) in its molecule, and the number of biphenyls per unit molecular weight of each satisfies a specific relationship. JPEG2026084600000048.jpg6068

To provide an ink set which can obtain a good image density even when a pigment ink is used and can obtain high friction fastness.SOLUTION: An ink set comprising: a pre-processing fluid; an aqueous pigment ink; and a post-processing fluid, wherein the pre-processing fluid contains an organic acid and an amine compound, and the post-processing fluid contains cationic resin particles.SELECTED DRAWING: Figure 1

This invention provides an aqueous inkjet recording ink that offers high image density on plain paper, excellent curl resistance, good redispersibility, and scratch resistance. [Solution] The water-based inkjet recording ink according to this embodiment contains a pigment, a pigment-coated resin, a water-soluble organic solvent, polyethylene glycol with a molecular weight of 400 in an amount of 10% to 20% by mass, 3% to 7% by mass of 3-methyl-1,5-pentanediol, 0.5% to 5% by mass of 2-ethyl-1,3-hexanediol, and water.

To suppress image density unevenness in a sub-scanning direction with high accuracy by suppressing consumption of paper.SOLUTION: The image forming apparatus 100 includes the image forming portion PY configured to form a yellow image, the image forming portion PM configured to form a magenta image, the reader A configured to read a first measurement image and a second measurement image including a yellow pattern image and a magenta pattern image, respectively, and the controller 110 configured to determine a correction value for correcting image density unevenness in the sub-scanning direction based on reading results of the first measurement image and the second measurement image by the reader A. In the first measurement image and the second measurement image, the positions of the yellow pattern image and the magenta pattern image are formed at different positions in the main scanning direction.SELECTED DRAWING: Figure 1

When adjusting the light emission timing of each light-emitting element based on the density of the correction image, it is determined whether or not the image density is lower than expected. [Solution] The control unit determines the deviation of the writing position based on the density of the correction image, and performs a correction process to correct the deviation of the writing position by adjusting the light emission timing of each light-emitting element based on the determined deviation of the writing position. When performing the correction process, the control unit performs at least one of the first process and the second process. The control unit performs a first process to determine whether or not an image density unevenness has occurred on the scanned surface based on the density of the first image. The control unit performs a second process to determine whether or not an abnormality in light intensity has occurred in any of the multiple light-emitting elements based on the density of the second image.

We provide an ink that can achieve both high image density and long-term storage stability. [Solution] The inkjet ink contains a pigment, a block copolymer in which the hydrophobic polymer block is composed of benzyl methacrylate and the hydrophilic polymer block is composed of methacrylic acid, and water. The acid value of the block copolymer is 120 mg KOH / g or more and 220 mg KOH / g or less. The content of the block copolymer is 0.6% by mass or more and 2.6% by mass or less. The mass ratio of the block copolymer to the pigment is 0.12 or more and 0.51 or less. In the inkjet ink, the mass ratio of solids in the supernatant liquid obtained by centrifugation is 0.5% by mass or more and 3.0% by mass or less.

When performing calibration in two stages, if the reference image is formed at the same location on the intermediate transfer belt, the present invention provides an image forming apparatus that can perform the second adjustment with high accuracy. [Solution] The image forming apparatus comprises an image carrier, a charging device, an exposure device, a developing device, an intermediate transfer belt, a cleaning brush, an image density sensor, and a control unit. The control unit performs calibration including: a first adjustment step of adjusting the image forming conditions based on the detection result of a first reference image formed on the intermediate transfer belt; a first surface measurement step of detecting the formation region of the first reference image with the image density sensor after the execution of the first adjustment step; and a second adjustment step of changing the image forming conditions based on the detection result of a second reference image formed in the formation region of the first reference image after the execution of the first surface measurement step. If the output value of the image density sensor in the first surface measurement step is less than or equal to a threshold, the second adjustment step is executed.

An image forming apparatus includes a plurality of image forming units configured to form images using toners of a plurality of colors, the plurality of image forming units including a first image forming unit configured to form an image using a first toner, and a second image forming unit configured to form an image using a second toner different from the first toner, an image bearing member configured to bear the images formed by the plurality of image forming units, a conveying member configured to convey a sheet to a nip portion for transferring the images on the image bearing member onto the sheet, and a controller configured to control the plurality of image forming units to form a detection image for detecting an image density.

To provide a method for manufacturing a toner having high cleaning property and image density stability.SOLUTION: Wherein the toner particles have a solidity of at least 0.90 and not more than 0.99, the metallic titanate compound particles have a shear adhesive force of at least 4000Pa and not more than 10000Pa, and the mixing step uses a mixing apparatus having a mixing tank and a rotatable stirring blade provided in the mixing tank, stirring and mixing the material to be treated by rotating the stirring blade at a tip peripheral speed of 30m / s or more and 70m / s or less in the mixing tank.SELECTED DRAWING: None

Provided is a developing roller which can suppress toner leakage and fogging and is also excellent in stability of image density. The developing roller includes a shaft member, an intermediate layer disposed radially outward of the shaft member, and a surface layer at an outermost position. The intermediate layer contains an aggregate A formed of particles dispersed in a resin. The surface layer contains particles B dispersed in a resin, and the particles B are at least one selected from the group consisting of particles and aggregates formed from the particles. The granular body (B) has an average diameter dB of not less than 1 [mu] m and not more than 10 [mu] m.

The present invention provides toner, a toner cartridge, and an image forming apparatus, the toner having excellent low-temperature fixing properties, excellent heat resistance even in the case of being reused, being able to sufficiently maintain a charge amount, and having difficulty in reducing an image density. The toner cartridge houses the toner. The toner of the embodiment has toner parent particles and an external additive. The external additive contains silica particles A, B, and C having particle diameters of 10 to 14 nm, 40 to 70 nm, and 90 to 150 nm, respectively. The content of each of the silica particles A, B, and C is 0.1 to 0.8 parts by mass, 0.3 to 1.2 parts by mass, and 0.3 to 1.2 parts by mass, respectively, relative to 100 parts by mass of the toner parent particles. The total content of the silica particles A, B, and C is 3.0 parts by mass or less relative to 100 parts by mass of the toner parent particles. The ratio of the content of the silica particles B and C to the content of the silica particles A is 1.0 to 5.0. The volume average primary particle diameter Dv50 of the toner is 5.5 to 11.0 μm. 50 is 5.5 to 11.0 μm.

To provide a toner for electrostatic image development that exhibits excellent low-temperature adhesion and fixation / separation properties with paper and resin media, as well as minimal change in image density even when continuous image formation is performed, and good post-processing properties. [Solution] The above-mentioned electrostatic image developing toner is an electrostatic image developing toner for continuous-form media comprising toner particles containing a release agent including a crystalline polyester resin and an ester wax, and an external additive, wherein the amount of crystalline polyester resin in the electrostatic image developing toner is 0.5% by mass or more and 5% by mass or less, the amount of ester wax in the electrostatic image developing toner is 5% by mass or more and 10% by mass or less, and the external additive has an adhesion strength of 10% or more and 35% or less as measured by a special test method.

To provide a post-treatment agent for oil-based ink with which it is possible to obtain a printed surface having a high image concentration by inhibiting bleed-through of the ink.SOLUTION: A post-treatment solution for oil-based ink is a water-in-oil emulsion and includes silica in both an oil phase and a water phase.SELECTED DRAWING: None

To provide a magnetic carrier for electrostatic charge image development that suppresses a decrease in image density due to an excessive increase in the charge amount of a toner in a low-humidity environment and suppresses contamination in an image forming apparatus due to toner scattering caused by a decrease in the charge amount of the toner in a high-humidity environment.SOLUTION: The magnetic core particle is a particle having a silicone resin on the surface thereof, and the coating resin layer is a layer containing a vinyl resin as a binder resin and containing a silica particle, the M1 and the M2 satisfy the following formula (1), where M1 is a mass of the toner after the toner is stored in a first environmental condition at a temperature of 30 °C and a humidity of 80% for 5 hours, and M2 is a mass of the toner after the toner is stored in a second environmental condition at a temperature of 23 °C and a humidity of 5% for 5 hours. 0.055 ≤ (M1-M2) / M1 * 100 ≤ 0.200 Formula (1) SELECTED DRAWING: Figure 1

To suppress occurrence of density unevenness of an image on a recording material after secondary transfer due to charging unevenness of toner on an intermediate transfer belt.SOLUTION: In the black monochrome image formation of an image forming device 100 having an intermediate transfer belt 7, the value of a primary transfer current supplied to the 5K of a primary transfer member is set higher than that in middle-humidity environments and lower than that in low-humidity environments in high-humidity environments, thereby suppressing the occurrence of "horizontal streak-like concentration unevenness".SELECTED DRAWING: Figure 6

The present invention provides an ink that can suppress the occurrence of curl and offset, while ensuring intermittent ejection and image density. [Solution] The ink contains a pigment, a pigment dispersion resin, polyethylene glycol with a molecular weight of 200 to 600 in an amount of 7% to 20% by mass, 3-methyl-1,5-pentanediol in an amount of 1% to 15% by mass, triethylene glycol monobutyl ether in an amount of 1% to 10% by mass, and water.

This invention provides an ink that can achieve both high image density and wide line width even in solvent formulations with high hydrophobicity. [Solution] The ink contains a surfactant represented by general formula (1), a water-soluble solvent with a log Kow of -1.0 or more and 0.4 or less, a pigment, and water, wherein the content of the water-soluble solvent is 30% by mass or more and 50% by mass or less. [Formula 1] TIFF2026054797000011.tif28160(In general formula (1), m and n are integers whose sum is between 12 and 14, x is an integer between 1 and 20, and y is an integer between 1 and 10.)

An image forming apparatus includes a second acquisition processing portion and a third acquisition processing portion. The second acquisition processing portion acquires a first toner image forming condition of a toner image forming portion. The third acquisition processing portion acquires, based on the first toner image forming condition acquired by the second acquisition processing portion, a relational expression that indicates a relationship between a second toner image forming condition of the toner image forming portion and a toner concentration of a specific toner image that is formed by the toner image forming portion. Further, the third acquisition processing portion uses specific expressions that respectively correspond to a plurality of coefficients included in the relational expression to calculate the plurality of coefficients corresponding to the first toner image forming condition acquired by the second acquisition processing portion.

An image forming apparatus includes an image carrying member, a charging device, an exposure device, a developing device, an intermediate transfer belt, a cleaning brush, an image density sensor, and a control portion. The control portion executes calibration including: a first adjustment process of changing an image forming condition based on a result of detection of a first reference image formed on the intermediate transfer belt; a first bare-surface-measurement process of detecting, after execution of the first adjustment process, a first-reference-image formation area; and a second adjustment process of changing, after execution of the first bare-surface-measurement process, the image forming condition based on a result of detection of a second reference image formed on the first-reference-image formation area. In a case where an output value of the image density sensor in the first bare-surface-measurement process is equal to or less than a threshold value, the second adjustment process is executed.

An image forming apparatus includes an image forming section, an optical scanning device, an image density sensor, and a control unit. The optical scanning device scans the surface of the image carrying member with light emitted from light sources to form an electrostatic latent image. The control unit can perform light amount calibration to adjust the exposure amount of the light scanning device based on the density of a reference image detected by the image density sensor. The reference image used for light amount calibration has a dot pattern in which as many individual dots as there are light sources are arrayed at regular intervals in the main scanning direction. The dot pattern is formed repeatedly in the main and sub scanning directions. The dots forming the dot pattern are arranged at different positions in the sub scanning direction to be displaced in units of pixels from each other.

The present invention provides a magnetic single-component toner that maintains high image density over a long period of time and does not cause image fogging, in a magnetic single-component development method using a non-contact regulated blade, and an image forming apparatus using the same. [Solution] The magnetic one-component toner consists of toner particles comprising toner matrix particles and an external additive attached to the surface of the toner matrix particles. The toner matrix particles include at least a binder resin and magnetic powder. The external additive includes wet silica particles and conductive inorganic particles. The wet silica particles are treated with a hydrophobic treatment agent whose surface consists of long-chain fatty acid esters with 18 or more carbon atoms. The conductive inorganic particles are treated with a hydrophobic treatment on their surface. The volume resistivity of the wet silica particles is 1.0E+7 [Ω·cm] or more and 1.0E+10 [Ω·cm] or less.

To provide an image forming device equipped with image forming means to perform an image forming process by electrophotography, in which accurate high density process control is realized even when a developer deteriorates.SOLUTION: According to a compound machine (10) pertaining to the present invention, a toner image (200) for test is formed on an intermediate transfer belt (40) and the density of this toner image (200) for test is detected by an image sensor (38) in high density process control. On top of that, a relationship between a toner adhesion amount (Cs) based on a normalized sensor output value (Vn) and a developing bias voltage DVB is approximated by a primary approximate equation. Furthermore, determination is made of the degradation degree of a developer on the basis of an inclination a and a segment b of the primary approximate equation, and the normalized sensor output value (Vn) is consequently corrected. Then, an actual toner adhesion amount (Cr) is derived on the basis of the normalized sensor output value (Vn) after correction and consequently an appropriate developing bias voltage (DVBf) is established.SELECTED DRAWING: Figure 10

Providing an electrophotographic photoreceptor with reduced image density unevenness. 【Solution means】It includes a conductive substrate, a charge generation layer disposed on the conductive substrate, and a charge transport layer disposed on the charge generation layer. The charge transport layer contains a phenol compound, a polyarylate resin, a polycarbonate resin, and a charge transport material, and the vector distance DIS HT (J / cm 3 ) 1 / 2 between the HSP value of the charge transport material and the HSP value of the polyarylate resin, and the vector distance DIS PC (J / cm 3 ) 1 / 2 calculated based on the Hansen solubility parameter satisfy the following formulas (1) and (2) respectively. An electrophotographic photoreceptor. Formula (1): DIS HT ≦3.9 Formula (2): 9.2≦DIS PC <12.0

It suppresses image density unevenness in the sub-scanning direction with high precision. [Solution] The image forming apparatus 100 comprises an image forming unit PY that forms an image, a reader A that reads a measurement image including a pattern image, and a control unit 110 that determines a correction value for correcting periodic image density unevenness in the sub-scanning direction based on the reading result of the measurement image by the reader A. The image forming unit PY has a photosensitive drum 1Y that rotates in the sub-scanning direction and forms a pattern image with a length of two or more cycles of the photosensitive drum 1Y. The control unit 110 determines a correction value based on the absolute value of the image density detected based on the reading result and the direction of change of the image density in the sub-scanning direction.