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7619791 |
Image forming method and image forming device
A reference developing image is formed on a photoreceptor drum under an image forming condition measured in advance, and the density of this reference developing image is detected. A development...
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7583906 |
Image forming apparatus
An image forming apparatus includes a plurality of development units each using a developer including a toner and a carrier, a density detection unit configured to perform a density detection...
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7579716 |
Power storage device and image forming apparatus
A power storage device includes an alternating current (AC) power source, a field effect transistor (FET), a capacitor bank, a direct current (DC) fixing heater, a step-down chopper circuit, and an...
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7565085 |
Image forming device and toner consumption amount estimating method
An image forming apparatus includes: toner supply amount detecting means for detecting a toner supply amount to a developer tank; detecting means for detecting a signal value of each pixel of an...
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7546048 |
Method for determining ink usage efficiency in commercial printing processes using pigments and quantitative tests
A method for determining printing ink usage efficiency (weight of ink required to print a given area) in a printing process is disclosed where the method is based on the analysis of pigment in the...
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7542688 |
Method of detecting pages subject to reload artifact with IOI (image on image) correction
In an image-on-image (IOI) color processing system, which superimposes toner images of different color separation toners onto a photoreceptor, a method for determining composite toner coverage on a...
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7539425 |
Method and device for adjusting to a minimum value the toner supply to a developing station of an electrographic printing unit or copying unit
In a method to adjust the toner supply to a minimum value in a developer station of an electrographic printing or copying device in which charge images are generated on an intermediate carrier, the...
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7512350 |
Image forming apparatus and method that identify halftone process parameter
An image forming apparatus appropriately adjusts an image forming conditions even if a halftone-processed image data is inputted. The image forming apparatus forms a patch image by applying a...
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7509060 |
Density determination method, image forming apparatus, and image processing system
A density signal value determination method, an image forming apparatus, and an image processing system are configured to automatically and optimally determine the density of a...
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7505700 |
Image forming apparatus capable of counting consumable consumption amount, and control method and control program therefor
An image forming apparatus which is capable of accurately performing a video count process based on image data and thus maintaining the quality of images even where DMA transfer processing is used....
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7457568 |
Image forming apparatus and method using liquid development in which toner density is determined based on patch image density
A CPU 113 executes a control program stored in a memory 116 thereby forming a plurality of patch images with a developing bias increased for each of the patch images; detecting a density of...
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7450867 |
Image forming apparatus, toner density control method, toner density control program and storage medium for storing the program
An amount of toner consumption accompanying development of an image corresponding to the image data is calculated based on image data, and a corrected consumption amount is calculated by...
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7360886 |
Position deviation detecting method and image forming device
In a position deviation detecting method for an image forming device, first and second patterns formed in different colors on image supporting mediums are transferred to an intermediate transfer...
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7359652 |
Image forming apparatus with tone correction and control method thereof
A first pattern is formed on a recording medium using a dark color substance and light color substance with substantially the same hue by supplying first pattern data to an image forming unit, and...
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7324769 |
Image forming apparatus having a changeable adjustment toner image positioning feature
In an image forming apparatus in which an maximum image width for image forming is smaller than the sum of a maximum recording material width of a usable recording material and length of two...
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7298980 |
Feed forward and feedback toner concentration control utilizing post transfer sensing for TC set point adjustment for an imaging system
A toner concentration control system for maintaining image quality in a developer structure, the toner concentration control system including: a transfer efficiency estimator for measuring a...
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7274887 |
System and method for setup of toner concentration target for a toner concentration sensor
A method by which the target of a toner concentration (TC) sensor can be set up based on the equivalent developability concept without using an expensive patch generator. First, use a black toner...
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7272333 |
Image quality measurements using linear array in specular mode
A method and system for controlling a printing device's tone reproduction curve, which may minimize contouring and help maximize the number of shades or colors available for an output image.
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7269362 |
Image forming apparatus, control method and toner consumption calculating apparatus and method
When the remaining toner amount within a developer is relatively large, a control target value of a toner amount is set to Ttgt 1, and a lower limit value of a toner amount which can regarded...
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7236711 |
Full-width array sensing of two-dimensional residual mass structure to enable mitigation of specific defects
A defect analysis system for a xerographic print engine includes a residual mass sensor that senses the two-dimensional signature structure of residual mass remaining on a photoconductive or other...
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7190912 |
Tandem type color image forming apparatus
An image forming apparatus includes a plurality of image bearing members that bear a latent image each and a detector corresponding to each image bearing member. The detectors optically detect...
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7164868 |
Image forming apparatus with changeable image forming conditions due to changes in a surface layer thickness of an image bearing member
An image forming apparatus includes an image bearing member having a surface layer; an electrostatic image forming device for forming an electrostatic image on the surface layer; a developing...
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7158732 |
Method and system for using toner concentration as an active control actuator for TRC control
A method of using toner concentration (TC) as an active actuator in the tonal reproduction curve (TRC) controller, so that not only will the TRC controller maintain the TRC of the output, but also...
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7120369 |
Method and apparatus for correcting non-uniform banding and residual toner density using feedback control
A feedback control method for controlling an ununiform banding on a photoreceptor is disclosed that includes arranging optical sensors on a photoreceptor, transferring an amount of toner on a piece...
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7099600 |
Image forming device that performs density detection
During a first rotation of a photoconductor, latent electrostatic images for color correction processing patterns are formed on the photoconductor, and the latent electrostatic images are developed...
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7092647 |
Image forming apparatus
This invention realizes and provides an image forming apparatus in which the presence or absence of a toner remaining in a toner storing portion is judged by a patch detecting method, characterized...
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7058325 |
Systems and methods for correcting banding defects using feedback and/or feedforward control
Systems and methods of controlling banding defects on a receiving member in an imaging or printing process using a feedback and/or feedforward control technique. In one exemplary embodiment, a...
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7054568 |
Method and apparatus for controlling non-uniform banding and residual toner density using feedback control
A system and method of determining a residual toner mass on a receiving member includes providing one or more test patterns to the receiving member, transferring the test patterns from the...
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7016620 |
Method and device for controlling a print process with high color density
In a method and device to control a print process in a printer or copier, with a character generator generating a latent print image and a latent toner marking on an image carrier. An exposure...
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7013095 |
Image forming apparatus with adjustable toner content in a developing device based on surface layer thickness of an image bearing member
An image forming apparatus includes an image bearing member having a surface layer; an electrostatic image forming device for forming an electrostatic image on the surface layer; a developing...
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6999689 |
Image forming apparatus and method of controlling same
Provided are an image forming apparatus and method of controlling same in which when toner replenishment from a toner accommodating unit has been performed satisfactorily, a no-toner indication can...
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6947681 |
Image forming apparatus with two-speed developing operation and toner control feature
An image forming apparatus in which the control of toner supply can be effected well irrespective of an image forming mode (image forming speed). The density of a toner in a developer contained in...
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6934480 |
Device and method for measuring image density
Disclosed is a device for measuring the density of an image in regard to a liquid test patch. The device has: a fan for drying a test patch by blowing air to the test patch disposed on at least one...
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6917780 |
Image forming apparatus that prevents attachment of toner to lateral sides of the developing roll
An image forming apparatus of non-contact developing method using two-component developer material which is capable of obtaining a clear image free from fogging, ghost and toner contamination. The...
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6731888 |
Image forming control using density detection
An image forming method includes: forming a first control image on an image bearing member by an image forming device; detecting the density of the first image by a detecting sensor; forming a...
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6658221 |
Method of and apparatus for measuring quantity of toner on belt-shaped image carrier
A light emitting element irradiates light upon a surface area of an intermediate transfer belt which is wound around a roller, i.e., upon a wind area, and light receiving units receive light...
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6587653 |
Applying and measuring toner in a print on a substrate by a printing machine
Applying a toner print to a substrate, in particular to a substrate ( 3 ). At least one print ( 7 ) is applied to the substrate. Then, the amount of toner applied to the substrate is measured by a...
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6529697 |
Methods and apparatus for calibrating inline color laser printers
Methods and apparatus for reducing the time required to generate a calibration image product on a transfer medium in an inline imaging device having a plurality of toner stations by simultaneously...
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6510297 |
Toner density sensor
An object of the invention is to provide a toner density sensor capable of detecting toner density with high accuracy without being affected by the temperature change. A light-emitting diode emits...
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6505010 |
Image forming apparatus
An image forming apparatus forming a full color image by plural color materials. An image of an original is color-separated so as to form a color separation signal, and the color separation signal...
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6442355 |
Developer density controlling apparatus including target density information detection and toner image density detection
A developer density controlling apparatus includes image density detecting device for detecting a target density on the basis of a detected image and, if a difference between a toner density...
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6434346 |
Printing and photocopying device and method whereby one toner mark is scanned at at least two points of measurement
The invention relates to an electrographic printing or photocopying device and method. A toner mark ( 10 ) is provided on a photoconductive drum and printed with toner using a developing station....
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6229971 |
Toner concentration detecting method and system
A method for detecting a toner concentration of a developer including toner particles provides that when developing a latent image having a predetermined area formed on a photoconductor using a...
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6141509 |
Toner content control device for an electrophotographic apparatus
A toner content control device for an electrophotographic apparatus of the type using a toner and carrier mixture. The control device determines an amount of toner replenishment on the basis of a...
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6134398 |
Electrostatographic reproduction machine having dual mode development unit control apparatus and method
A method and apparatus in an electrostatographic reproduction machine having a plurality of development units for reliably producing high quality toner particle images under varying sustained area...
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6075954 |
Toner density control device
A toner density a control device which has first toner density control device and a second toner density control device including a detecting member and, in case the density of the image detected...
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6029021 |
Image forming apparatus having an adaptive mode density control system
An image forming system adopting a dual-component inversion developing system for forming on an image carrier a toner patch image used for detecting an image concentration and controlling an image...
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6018635 |
Method and arrangement for adjusting density in electrophotographic printing
A method and arrangement for adjusting density in electrophotographic printing are disclosed. A toner mark is printed at a predetermined location on each of sheets of a continuous stationery. A...
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5999761 |
Dynamic adjustment of characteristics of an image forming apparatus
An image forming apparatus in accordance with the invention includes a print engine with a photoreceptor, a laser exposure device for creating an image on the photoreceptor and one or more toning...
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5991558 |
Image forming apparatus that control the reflected light detected by an optical scanner in response to a gradation area percentage of a toner patch
An image forming apparatus that prepares a toner patch including a predetermined gradation area percentage on an image support to detect a developing concentration. An optical sensor detects...
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