Patent application number | Description | Published |
20120121139 | INSPECTION APPARATUS, INSPECTION METHOD, AND STORAGE MEDIUM - An inspection apparatus includes an obtaining unit configured to receive a target image obtained by scanning a printed surface of a printed material and receive a reference image obtained from print data of the printed surface; an analysis unit configured to analyze the reference image to obtain flatness levels indicating degrees of variation in pixel values; and a control unit configured to determine inspection thresholds for different types of image areas in the reference image based on the flatness levels, compare the reference image and the target image to detect differences in pixel values, and determine whether the differences are greater than or equal to the inspection thresholds to inspect print quality of the printed surface for the respective image areas. | 05-17-2012 |
20120162649 | COLOR CHART - A color chart having a plurality of mirror-image color blocks arranged in a matrix, with each color block a mirror image of an adjacent color block, each color block having rows and columns of color patches, wherein the concentration of a first color of the multiple colors changes unidirectionally across color patches in any given row of a color block, the concentration of a second color of the multiple colors changes unidirectionally across color patches in any given column of a color block, and the concentration of a third color of the multiple colors remains unchanged across all the plurality of color patches within a color block and differs only between color blocks. | 06-28-2012 |
20130016374 | IMAGE TEST APPARATUS, IMAGE TEST SYSTEM, AND IMAGE TEST METHODAANM KAWAMOTO; HiroyukiAACI KanagawaAACO JPAAGP KAWAMOTO; Hiroyuki Kanagawa JPAANM Kitai; TadashiAACI KanagawaAACO JPAAGP Kitai; Tadashi Kanagawa JPAANM Kaneko; HitomiAACI SaitamaAACO JPAAGP Kaneko; Hitomi Saitama JPAANM Kojima; KeijiAACI KanagawaAACO JPAAGP Kojima; Keiji Kanagawa JPAANM Ishizaki; HiroyoshiAACI KanagawaAACO JPAAGP Ishizaki; Hiroyoshi Kanagawa JPAANM Miyamoto; KeiichiAACI KanagawaAACO JPAAGP Miyamoto; Keiichi Kanagawa JP - An image test apparatus includes a color-image-data acquiring unit that acquires color image data being data of an image to be formed with a color material; a master-image-data generating unit that converts the color image data depending on transparent image data being data of an image to be formed with a transparent color material, thereby generating master image data; and an image testing unit that tests, using the master image data, a test image data which is generated by optically reading a print image from a printed matter on which the print image based on the color image data and the transparent image data has been printed. | 01-17-2013 |
20130044342 | APPARATUS, SYSTEM, AND METHOD OF INSPECTING IMAGE, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An inspection apparatus obtains a correction parameter for correcting the positional shift between a previously read image and a master image, and corrects one of a currently read image or a master image using the correction parameter for the previously read image, before comparing between the currently read image and the master image to detect the positional shift in the currently read image. | 02-21-2013 |
20130044347 | APPARATUS, SYSTEM, AND METHOD OF INSPECTING IMAGE, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An inspection apparatus, inspection system, inspection method, and inspection control program stored in a recording medium, each of which sets a reference point in a master image and a read image read from a printed image, which is to be used for detecting the positional shift between the read image and the master image, based on determination whether a pattern previously added to the printed image for detecting the positional shift is available or can be used to effectively detect the positional shift. | 02-21-2013 |
20130250319 | IMAGE INSPECTION METHOD, IMAGE INSPECTION APPARATUS, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An image inspection apparatus obtains a threshold value indicating an allowable range of offset differences between an output target inspection image and a pre-provided inspection image, and determines whether to inspect a read image obtained by reading an output target image formed on a recording sheet having a pre-provided image, using the threshold value. | 09-26-2013 |
20130250369 | APPARATUS, SYSTEM, AND METHOD OF INSPECTING IMAGE, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An apparatus, system, method, and a non-transitory recording medium storing an image inspection control program, each of which is capable of inspecting a printed image based on comparison between a read image read from the printed image and an inspection image. As a portion of the read image is obtained, the size of the obtained portion of the read image is corrected to match the size of the inspection image, using a magnification ratio previously obtained. After matching the sizes of the read image and the inspection image, the read image is compared with the inspection image to inspect the read image. | 09-26-2013 |
20130250370 | APPARATUS, SYSTEM, AND METHOD OF INSPECTING IMAGE, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An apparatus, system, method, and non-transitory recording medium storing an image inspection control program, each of which is capable of inspecting a printed image are provided. While generating an inspection image to be used for inspecting a read image obtained by reading the printed image, attribute data indicating, for each pixel in the inspection image, whether the pixel belongs to drawing data in the inspection image is generated. The attribute data is used to process inspection of the read image based on comparison between the read image and the inspection image. | 09-26-2013 |
20130250377 | IMAGE READING DEVICE, APPARATUS INCLUDING IMAGE READING DEVICE, IMAGE READING CONTROLLING METHOD, AND RECORDING MEDIUM STORING IMAGE READING CONTROL PROGRAM - An image reading device includes an imaging device including a plurality of imaging elements, and a calibration plate having a surface on which a plurality of color patches is formed, and a processor that instructs the imaging device to read the plurality of color patches while changing a relative position between the plurality of color patches and the plurality of imaging elements, to output reading results of the plurality of color patches. | 09-26-2013 |
20130250378 | IMAGE READING DEVICE, APPARATUS INCLUDING IMAGE READING DEVICE, IMAGE READING CONTROLLING METHOD, AND RECORDING MEDIUM STORING IMAGE READING CONTROL PROGRAM - An image reading device includes an imaging device including a plurality of imaging elements, a color measuring unit that detects color of an object at a color measurement area, a calibration plate having a surface on which a plurality of color patches is formed, and a processor that causes the color measuring unit to read the plurality of color patches while changing a relative position between the plurality of color patches and the plurality of imaging elements to output color measurement results of the plurality of color patches, and generates a set of reference values for the plurality of color patches based on the color measurement results of the plurality of colors. The set of reference values are compared with the reading results of the plurality of color patches to generate a set of correction values for correcting the reading results of the plurality of color patches. | 09-26-2013 |
20140313538 | APPARATUS, SYSTEM, AND METHOD OF INSPECTING IMAGE, AND RECORDING MEDIUM STORING IMAGE INSPECTION CONTROL PROGRAM - An inspection apparatus, inspection system, inspection method, and inspection control program stored in a recording medium, each of which sets a reference point in a master image and a read image read from a printed image, which is to be used for detecting the positional shift between the read image and the master image, based on determination whether a pattern previously added to the printed image for detecting the positional shift is available or can be used to effectively detect the positional shift. | 10-23-2014 |
20140314281 | IMAGE INSPECTION APPARATUS, IMAGE INSPECTION SYSTEM AND IMAGE INSPECTION METHOD - An image inspection apparatus for checking an image printed on a recording medium includes: a reference pixel obtaining unit configured to generate a reference image and obtain a first pixel value from the reference image; a print pixel obtaining unit configured to extract an image printed area and obtain a second pixel value from the image; an offset processing unit configured to add a non-image-printed area; and an image checking unit configured to compute a difference between the first image pixel value and the second image pixel value and detect an error when the difference is higher than a predetermined threshold value, wherein the non-image-printed area contains a third pixel value that is different from the first pixel value or the second pixel value, and the image checking unit suspends a determination whether or not there is an error in the image printed area associated with the non-image-printed area. | 10-23-2014 |
Patent application number | Description | Published |
20100229160 | CONVERTING PROGRAM CODE OF A MULTI-THREADED PROGRAM INTO PROGRAM CODE CAUSING LESS LOCK CONTENTIONS - A method, computer system, and computer readable article of manufacture for converting a first program code in a multi-threaded program into a second program code which causes less lock contention. A processing unit determines whether the first program code includes either a first class having a method call to a third class that operates while taking synchronization by locking, or a second class inheriting a parent class that operates while taking synchronization by locking. If the first class, then it is converted into a class with a method call to a concurrent operation executable class that is functionally equivalent and a shorter lock holding section. If the second class, then it is converted into a class with a method call to a concurrent operation executable class that is functionally equivalent to that of the parent class, and a shorter lock holding section. | 09-09-2010 |
20100275190 | METHOD OF CONVERTING PROGRAM CODE OF PROGRAM RUNNING IN MULTI-THREAD TO PROGRAM CODE CAUSING LESS LOCK COLLISIONS, COMPUTER PROGRAM AND COMPUTER SYSTEM FOR THE SAME - A method of converting a program code of a program running in multi-thread to a program code which causes fewer lock collisions. The method includes reading the program code into a memory and searching the program code for a first conditional statement making a branch to a path, which is in a synchronized block and has no side effect on the synchronized block; duplicating the path having no side effect to which the branch is made by the searched first conditional statement into the outside of the synchronized block; and adding a second conditional statement into the program code in response to the duplication, wherein the second conditional statement is a conditional statement making a branch to the duplicated path having no side effect. Also provided is a system and an article of manufacture which causes a computer to carry out the steps of the above method. | 10-28-2010 |
20100306741 | Method for Optimizing Processing of Character String During Execution of a Program, Computer System and Computer Program for the Same - A method, computer system and computer program for optimizing the processing of a character string during execution of the program by using characteristic information that indicates a characteristic of the character string and is associated with the character string. The method includes the steps of determining, on the basis of a characteristic of a first character string and operation for the first character string, a characteristic information of at least one of the first character string and a second character string obtained as a result of the operation, and associating the characteristic information with the at least one character string. | 12-02-2010 |
Patent application number | Description | Published |
20090046121 | INKJET RECORDING APPARATUS - An ink non-ejection detecting circuit device for an inkjet recording apparatus is disclosed which comprises a bridge circuit including a piezoelectric head having a piezoelectric element, a first resistor connected in series to the piezoelectric head, a capacitor provided outside the piezoelectric head, and a second resistor connected in series to the capacitor. A differential voltage that appears between the piezoelectric head and the first resistor and between the capacitor and the second resistor is amplified, so that the acoustic-system admittance of the piezoelectric head can be detected with a high SN ratio. | 02-19-2009 |
20090160891 | CAPACITIVE LOAD DRIVING CIRCUIT AND DROPLET EJECTION APPARATUS - A capacitive load driving circuit includes: a phase lead compensator, advancing a phase of an output signal of a filter; a series compensator, determining an error between a driving signal and an output signal of the phase lead compensator; a stabilization compensator, performing a derivative action on an output signal of the filter; a voltage comparison unit, comparing a differential voltage between a signal output from the series compensator and a signal output from the stabilization compensator, with a voltage of a predetermined triangular waveform, and outputting a pulse width modulation signal; a voltage amplification unit, amplifying the voltage of the pulse width modulation signal output, and supplying the amplified pulse width modulation signal to the input terminal of the filter; and plural capacitive loads each connected in parallel to the capacitor. A droplet ejection apparatus includes the capacitive load driving circuit. | 06-25-2009 |
20090244152 | PIEZOELECTRIC HEAD INSPECTION DEVICE AND DROPLET JETTING DEVICE - The present invention provides an inspection device for a piezoelectric head. The piezoelectric head includes: a pressure chamber filled with liquid, a liquid supply channel that supplies the liquid to the pressure chamber, a nozzle at which droplets are jetted from the pressure chamber, and a piezoelectric element that applies pressure to the pressure chamber. The inspection device includes: a detection component that, when the piezoelectric element is driven on the basis of a predetermined detection signal, outputs a signal corresponding to behavior of an acoustic vibration system of the piezoelectric head; and a judgment component that, on the basis of the detection signal and the signal outputted by the detection component, judges for a cause of defective ejections at the piezoelectric head. | 10-01-2009 |
20100045714 | CAPACITIVE LOAD DRIVING CIRCUIT AND LIQUID DROPLET JETTING APPARATUS - A capacitive load driving circuit including: a filter including an inductor to which an analog driving signal is input, and a capacitor with a fixed capacitance where one electrode is connected the inductor and other electrode grounded; a plurality of capacitive loads connected in parallel to the capacitor, and driven in accordance with the analog driving signal; a conversion section converting a load voltage to a digital signal; a signal processing section generating a predetermined signal for driving the capacitive load, deriving a signal that represents a magnitude of an electric current flowing to the capacitive load from the digital signal and a digital driving signal, subtracting the signal from the predetermined signal, and outputting the subtracted signal as the digital driving signal; and a switching section generating the analog driving signal by performing switching based on the digital driving signal, and outputting the analog driving signal. | 02-25-2010 |
20110002486 | CAPACITIVE LOAD DRIVING CIRCUIT AND METHOD, LIQUID DROPLET EJECTION DEVICE, AND PIEZOELECTRIC SPEAKER DRIVING DEVICE - There is provided a capacitive load driving circuit which applies a driving signal to a capacitive load. The driving circuit includes: an operational amplifier outputting a difference signal between signals from an inverting input terminal and a non-inverting input terminal, and setting a loop gain; a pulse width modulator pulse-width-modulating the difference signal outputted by the operational amplifier, and outputting resultant digital signal; a digital voltage amplifier amplifying a voltage of the digital signal; a first filter smoothing a digital signal from the digital voltage amplifier, and supplying a smoothed signal to the capacitive load as the driving signal; an impedance converting circuit converting an impedance of an output signal of the first filter; and a first feedback circuit feeding-back the driving signal, which is outputted from the first filter, to the inverting input terminal of the operational amplifier via the impedance converting circuit. | 01-06-2011 |
20140022571 | IMAGE READING APPARATUS AND METHOD, AND IMAGE FORMING APPARATUS - An image reading apparatus includes an image reading unit and a computational unit. The image reading unit includes a reference reflecting member that acts as a color reference, an illuminating unit that illuminates a part of the reference reflecting member and a sheet being transported in proximity thereto, a line sensor that reads an image formed on the sheet and the part of the reference reflecting member in proximity to the sheet in the sheet width direction, and a spectroscope that measures the spectral distribution of each of multiple patches for correcting color tones formed on the sheet and arranged in the sheet transport direction. The computational unit generates color tone correction data by performing computations based on the spectral distribution of each patch measured by the spectroscope, and the read values of the reference reflecting member obtained by the line sensor. | 01-23-2014 |
Patent application number | Description | Published |
20090027993 | Semiconductor memory device and data storage method - According to an aspect of the present invention, there is provided a semiconductor memory device for storing data defining a multidimensional space based on coordinate information of the data, including: a cell array having memory cells arranged in a lattice pattern, for storing the data; a word line selector selecting and driving any one of a plurality of word lines which activate memory cells arranged in a row direction; write amplifiers/sense amplifiers writing/reading data to/from the memory cells arranged in a column direction; an amplifier selector inputting/outputting the data to/from the selected one of the write amplifiers/sense amplifiers; and an address conversion circuit generating a row address to be supplied to the word line selector based on the coordinate information of the data, and to generate a column address to be supplied to the amplifier selector by converting the coordinate information of the data into one-dimensional information. | 01-29-2009 |
20100312978 | COMPUTER SYSTEM, INFORMATION PROTECTION METHOD, AND PROGRAM - A computer system increases the confidentiality of a memory to be protected and prevents invalid access that is made, for example, by replacing the memory. The computer system includes a memory in which state information AA, which indicates whether or not information to be protected is stored in a predetermined memory area, and access permission information BB, which indicates whether or not access to the memory area is permitted, are stored; and an access control unit that rewrites the state information AA when information to be protected is written to, or deleted from, the memory area and at the same time, when the system is started, rewrites the access permission information BB to permit access to the memory area if information to be protected is not written in the memory area but, otherwise, rewrites the access permission information BB to the access inhibition state. | 12-09-2010 |
20110013466 | SEMICONDUCTOR APPARATUS AND DATA READING METHOD - A semiconductor device includes multiple memory cells, a first and second digit lines, where either of them is coupled to the memory cell to be read, a sense amplifier having a first and second sense nodes that are respectively connected to the first and second digit lines, a first switch between the first digit line and the first sense node, a second switch between the second digit line and the second sense node, and a control circuit that outputs a first and second control signals for controlling a conducive state of the first and second switches. When an activation of the sense amplifier is started, the control circuit makes the first and second switches conductive and disconnects the first or second switch corresponding to the digit line to which the memory cell to be read is not connected according to a potential difference between the first and second sense nodes. | 01-20-2011 |
20110051534 | Semiconductor storage device and its control method - A semiconductor storage device, in which successive reading and successive writing of data having a predetermined length from and to a memory cell specified by a certain address are performed, includes a plurality of memory cells, address input terminals through which the address is input, data output terminals through which read data having the predetermined length is output, and data input terminals through which write data having the predetermine length is input. Part of the address input terminals are also used as the data output terminals. In this way, the operation of successive reading and successive writing performed in succession at the same address can be made faster without increasing the number of terminals. | 03-03-2011 |
Patent application number | Description | Published |
20080227912 | OXYGEN-ABSORBING RESIN, OXYGEN-ABSORBING RESIN COMPOSITION AND OXYGEN-ABSORBING CONTAINER - Disclosed is an oxygen-absorbing resin which exhibits excellent oxygen absorption performance even in the absence of a transition metal catalyst. Specifically disclosed is an oxygen-absorbing resin which is composed of a copolyester obtained by copolymerizing at least the following monomers (A)-(C). Monomer (A): a dicarboxylic acid or a derivative thereof having a carbon atom bonded to both the structures (a) and (b) below and also bonded to one or two hydrogen atoms, wherein the carbon atom is contained in an alicyclic structure (a) a carbon-carbon double bond group (b) any one of a functional group containing a heteroatom or a linking group derived from such a functional group, a carbon-carbon double bond group and an aromatic ring Monomer (B): at least one selected from the group consisting of a dicarboxylic acid having an aromatic ring or a derivative thereof, and a hydroxycarboxylic acid having an aromatic ring or a derivative thereof Monomer (C): a diol | 09-18-2008 |
20090098323 | OXYGEN-ABSORBING RESIN, OXYGEN-ABSORBING RESIN COMPOSITIONS AND OXYGEN-ABSORBING CONTAINERS - The invention aims at providing an oxygen-absorbing resin which has excellent oxygen absorption performance and which can dispense with the addition of a transition metal catalyst or the irradiation with a radiation. The invention provides an oxygen-absorbing resin which is obtained by polymerizing a raw material containing a monomer (A) having an unsaturated alicyclic structure bearing a carbon-carbon double bond wherein one carbon atom adjacent to the carbon-carbon double bond is bonded to an electron-donating substituent and a hydrogen atom and another carbon atom adjacent to the carbon atom is bonded to a heteroatom-containing functional group or a bonding group derived from the functional group with the electron-donating substituent and the functional or bonding group taking cis-configuration and which contains the unsaturated alicyclic structure in an amount of 0.5 to 10 meq/g; oxygen-absorbing resin compositions containing the above oxygen-absorbing resin; and oxygen-absorbing containers, characterized by having an oxygen-absorbing layer made from the resin or the compositions. | 04-16-2009 |
20100062530 | CELL CULTURE METHOD, CELL CULTURE SYSTEM AND CULTURE MEDIUM ADJUSTEMENT APPARATUS - In a cell culture in a sealed cell culture container, gradual deterioration of culture environment is prevented. A cell culture method in which cell culture is conducted by adding a fresh culture medium to a culture container in which cells and a culture medium are enclosed, which includes the steps of | 03-11-2010 |
20100075406 | CELL CULTURE APPARATUS, CELL CULTURE SYSTEM AND CELL CULTURE METHOD - By maintaining the cell density during culture at an appropriate level and eliminating the procedure of transferring cells from a container to another container when a large amount of cells are cultured, damage on cells can be reduced, risk of contamination can be lowered, labor saving can be attained and automation can be attained. | 03-25-2010 |
20100087619 | Oxygen-Absorbing Resin, Oxygen-Absorbing Resin Composition and Oxygen-Absorbing Container - Disclosed is an oxygen-absorbing resin which exhibits excellent oxygen absorption performance even in the absence of a transition metal catalyst. Specifically disclosed is an oxygen-absorbing resin which is composed of a copolyester obtained by copolymerizing at least the following monomers (A)-(C). Monomer (A): a dicarboxylic acid or a derivative thereof having a carbon atom bonded to both the structures (a) and (b) below and also bonded to one or two hydrogen atoms, wherein the carbon atom is contained in an alicyclic structure (a) a carbon-carbon double bond group (b) any one of a functional group containing a heteroatom or a linking group derived from such a functional group, a carbon-carbon double bond group and an aromatic ring Monomer (B): at least one selected from the group'consisting of a dicarboxylic acid having an aromatic ring or a derivative thereof, and a hydroxycarboxylic acid having an aromatic ring or a derivative thereof Monomer (C): a diol | 04-08-2010 |
20110318725 | CELL CULTURE METHOD, CELL CULTURE DEVICE, METHOD FOR COUNTING SUBSJECT MATTERS TO BE COUNTED IN CONTAINER AND DEVICE FOR COUNTING - Cell aggregate formation control and cell aggregate disintegration control are carried out with respect to cells in a culture container to increase cell proliferation efficiency. The number of the cells in the culture container is counted without disassembly of a culture system and irrespective of the density of the cells. | 12-29-2011 |
20130143734 | Resin for Oxygen-absorbing Adhesive and Oxygen-absorbing Adhesive - The purpose of the present invention is to provide a two-component curable oxygen-absorbing resin composition that has both oxygen-absorbing and adhesive properties and cohesive power. The resin for an oxygen-absorbing adhesive is a polyester comprising structural units derived from an acid component (A) and an acid component (B), wherein the ratio of the acid component (A) to total acid components is 70 to 95 mol %, the ratio of the acid component (B) to total acid components is 0 to 15 mol %, the polyester has a glass transition temperature of −20° C. to 2° C., the resin is cured using a hardening agent, the acid component (A) is tetrahydrophthalic acid or a derivative thereof, or tetrahydrophthalic acid anhydride or a derivative thereof, and the acid component (B) is phthalic acid. | 06-06-2013 |
20130230914 | CULTURE CONTAINER FOR ADHERENT CELLS AND METHOD FOR PRODUCING CULTURE CONTAINER FOR ADHERENT CELLS - A culture bag for culturing adherent cells is provided without requiring a highly clean production environment and a complex production step such as a masking step. An adherent cell culture vessel that is formed of a polyolefin is configured so that part or the entirety of the inner surface of the culture vessel has a static water contact angle of 95° or more, and has an advancing contact angle and a receding contact angle that satisfy the inequality “advancing contact angle−receding contact angle>25°” when water runs down along the inner surface. | 09-05-2013 |
20140335608 | CELL CULTURE KIT, AND METHOD OF USING CELL CULTURE KIT - A cell culture kit for cultivating cells in a closed system that comprises at least one or more of each of: a culture container for cultivating cells; a culture medium storage container for storing a culture medium or the like; a cell injection container for injecting cells; and a cell collecting container for collecting a suspension of cells after cultivation; wherein the culture medium storage container is also used as a waste liquid container for collecting a culture medium after cultivation, and the culture container, the culture medium storage container, the cell injection container and the cell collecting container are linked to one another through a conduit. Also provided is a cell culture kit including at least one or more of a sampling container that is capable of sampling part of a suspension of cells during cultivation, wherein the sampling container is linked to the culture container through a conduit. | 11-13-2014 |
Patent application number | Description | Published |
20130161900 | IMAGE FORMING APPARATUS, RECORDING MEDIUM CONVEYING METHOD, AND IMAGE FORMING SYSTEM - A recording medium conveyor includes a first conveyance part conveying a recording medium; a second conveyance part conveying the conveyed recording medium toward a transfer position; a detection part detecting the position of the recording medium conveyed by the second conveyance part; a position error detection part detecting a position error between the transfer position and a position at which there is to be the recording medium when an image reaches the transfer position; a position error storage part storing the detected position errors; a steady-state position error calculation part calculating a steady-state position error from the stored position errors; a first control part controlling the conveyance speed of the first conveyance part to reduce the steady-state position error; and a second control part controlling the conveyance speed of the second conveyance part to reduce the detected position error, with the steady-state position error being reduced. | 06-27-2013 |
20130228968 | MEDIUM CONVEYING APPARATUS, IMAGE FORMING APPARATUS, AND MEDIUM CONVEYING SYSTEM - A medium conveying apparatus includes a conveying unit including two rotating members for conveying a medium therebetween, a driving unit configured to drive a rotation of at least one of the rotating members, a parameter calculating unit configured to calculate a parameter of the driving unit, and a medium detecting unit configured to detect the medium conveyed by the rotating members by comparing the parameter calculated by the parameter calculating unit when the medium is conveyed by the rotating members and a reference parameter calculated by the parameter calculating unit when the medium is not conveyed by the rotating members. | 09-05-2013 |
20140312563 | MEDIUM CONVEYING APPARATUS, IMAGE FORMING APPARATUS, MEDIUM CONVEYING SYSTEM, AND MEDIUM CONVEYING METHOD - A medium conveying apparatus includes a conveying status detecting unit configured to determine a conveyance status of a medium based on a driving torque of a driving unit, wherein the conveying unit is configured to convey the medium at a reference speed, the reference speed being faster than the upstream conveying unit at least when the medium is conveyed from the upstream conveying unit, and the reference speed being slower than the downstream conveying unit at least when the medium is conveyed to the downstream conveying unit, and wherein the conveyance status of the medium is detected by the comparison of a prescribed reference torque to the driving torque of the driving unit at least when the medium is conveyed between the upstream conveying unit and the conveying unit or when the medium is conveyed between the conveying unit and the downstream conveying unit. | 10-23-2014 |
20150220038 | BELT TRANSPORT APPARATUS, IMAGE FORMING APPARATUS, AND IMAGE FORMING SYSTEM - A belt transport apparatus includes a first computation unit that computes a first deviation between a surface speed of a belt and a target speed of the belt, a position controller that computes a speed correction value based on the first deviation, a speed deviation ratio computation unit that computes a ratio of the belt surface speed and a rotational speed of a driving roller, a second computation unit that selectively computes according to predetermined conditions one of a second deviation between the rotational speed and a sum of an increment of the speed correction value and the target speed and a third deviation between the rotational speed and a sum of a value corrected according to the ratio stored in a storage unit and the target speed, and a control unit that controls the rotational speed based on the one of the second and third deviations. | 08-06-2015 |
Patent application number | Description | Published |
20100179772 | Control device, image forming device, wear detecting method, program, and storage device - A control device includes a transmission unit including a first gear rotating with a motor shaft and a second gear rotating with a rotating roller which drives a rotated body, a speed detecting unit for detecting the rotational speed of the rotated body or rotating roller, a motor controlling unit for maintaining a constant motor shaft rotational speed based on the rotational speed, a converting unit for converting the rotational speed to a relationship between a frequency contained in a variation of the rotational speed in association with time and a variation value of the rotational speed, and a wear detecting unit for detecting a predictor of wear of cogs in at least one of the first and second gears when the variation value at a specified frequency, determined based on the number of the cogs of the first gear and the motor shaft rotational speed, exceeds a threshold value. | 07-15-2010 |
20100239293 | Moving body controlling device, intermediate transferring device, and image forming apparatus having the same - A disclosed moving body controlling device includes a first moving body driven by a first motor that is controlled by a first control unit, a second moving body driven by a second motor that is controlled by a second control unit and affecting movement of the first moving body, a memory unit storing a relationship between the second motor rotational speed and an indicating value for driving the first and second motors when the second control unit changes the second motor rotational speed while the first control unit controls a first motor rotational speed to cause a first rotational body surface speed to be a predetermined speed in a mode of setting a second motor target rotational speed, whereby a reference point at which the surface speed starts to exceed the predetermined speed is detected, and based on the reference point the second motor target rotational speed is set. | 09-23-2010 |
20110176846 | CONVEYING DEVICE, IMAGE FORMING APPARATUS, AND PROGRAM - An image forming apparatus includes a feed unit, a sensor, a control unit, a measuring unit, and a determining unit. The feed unit | 07-21-2011 |
20110229163 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus detects a load abnormality in at least one of a first rotational member and a second rotational member. An element acquisition part acquires a first control element and a second control element. A first comparison part compares the first control element with a first threshold value and also compares the first control element with a second threshold value larger than the first threshold value. A second comparison part compares the second control element with a third threshold value and also compares the second control element with a fourth threshold value larger than the third threshold value. An abnormality detection part detects a load abnormality in a load applied to at least one of the first and second rotational members based on results of comparison by the first comparison part and the second comparison part and identifies a cause of the detected load abnormality. | 09-22-2011 |
20120070168 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus detects a load abnormality in first and second rotational members acting on each other. An inclination calculation part calculates an inclination of a second control element. A first comparison part compares a first control element with a first threshold value and also with a second threshold value larger than the first threshold value. A second comparison part compares an inclination of change in the second control element with a third threshold value of a negative value and also with a fourth threshold value of a positive value. An abnormality detection part detects a load abnormality in a load applied to the first rotational member and the second rotational member based on results of comparison by the first comparison part and the second comparison part and identifies a cause of the detected load abnormality. | 03-22-2012 |
20120326387 | SHEET CONVEYING DEVICE, IMAGE FORMING APPARATUS, SHEET CONVEYING MOTOR CONTROL SYSTEM, AND STORAGE MEDIUM - A sheet conveying device includes a first rotator, a second rotator, and a third rotator, at least one of which is configured to convey a sheet medium; a first detection unit configured to detect a first control factor for controlling a first motor that rotates the first rotator; a second detection unit configured to detect a second control factor for controlling a second motor that rotates the second rotator; a motor control unit configured to control a rotational speed of a third motor that rotates the third rotator; and a speed control unit configured to request the motor control unit to change the rotational speed of the third motor based on the sum of the first control factor and the second control factor. | 12-27-2012 |
20130343772 | LOAD ABNORMALITY DETECTION APPARATUS PERFORMING ACCURATE JUDGMENT OF CAUSE OF ABNORMALITY - A load abnormality detection apparatus includes first and second rotational members that contact each other directly or via a recording medium interposed therebetween, a first motor that drives the first rotational member and is controlled by a first drive current and a second motor that drives the second rotational member and is controlled by a second drive current. The load abnormality detection apparatus further includes a current detection part configured to detect the first and second drive currents, a first judgment part configured to judge whether the first drive current is within a first range, a second judgment part configured to judge whether the second drive current is within a second range and an abnormality detection part configured to detect a load abnormality of the first and/or second rotational members and identify a cause of the load abnormality based on results from the first and second judgment parts. | 12-26-2013 |