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Riso Kagaku Corporation patents


Recent patent applications related to Riso Kagaku Corporation. Riso Kagaku Corporation is listed as an Agent/Assignee. Note: Riso Kagaku Corporation may have other listings under different names/spellings. We're not affiliated with Riso Kagaku Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "R" | Riso Kagaku Corporation-related inventors


Printer with time information comparing function

A printer includes: an image former configured to form an image on a sheet based on a print job; a processor; and a memory including instructions that, when executed by the processor, cause the processor to perform operations. The operations include: comparing first time information indicating time information set for a region where the printer is allowed to be present and second time information indicating time information in a region where the printer is currently present and determining whether a time difference between the first time information and the second time information is greater than a predetermined time, and upon determining that the time difference is greater than the predetermined time, calling for execution of maintenance of the printer and selectably displaying options of the execution of the maintenance of the printer and execution of limited print processing by the image former.. ... Riso Kagaku Corporation

Printing machine

A printing control machine includes an obtaining section, a determination section, and a printing control section. The obtaining section obtains from each of a plurality of printing machines, ink information regarding an ink mounted to the each printing machine. ... Riso Kagaku Corporation

Printing machine

A printing machine includes a storing unit, a determination section, and an execution section. The storing unit stores mac addresses of information processing machines when the power is turned off. ... Riso Kagaku Corporation

Aqueous inkjet ink and method for manufacturing printed article

An aqueous inkjet ink is disclosed which contains water, a polyoxyethylene polyglyceryl ether and a colorant, wherein a ratio (b/a) of the total number (b) of hydroxyl groups within a molecule of the polyoxyethylene polyglyceryl ether relative to the weight average molecular weight (a) of the polyoxyethylene polyglyceryl ether is within a range from 0.002 to 0.012.. . ... Riso Kagaku Corporation

Inkjet printer with air bubble discharge function

An inkjet printer includes: a closing unit configured to close at least part of an ink passage connected to an inkjet head to form a closed passage; a negative pressure generator configured to generate a negative pressure in the closed passage; an ink deliverer configured to deliver ink to the inkjet head via the ink passage; and a controller. The controller: drives the closing unit to form the closed passage; drives the negative pressure generator to generate the negative pressure in the closed passage; and, upon the negative pressure in the closed passage reaching a prescribed pressure, stops the negative pressure generator while driving the closing unit to release closure of the at least part of the ink passage, and drives the ink deliverer to discharge an air bubble together with the ink in the at least part of ink passage from the inkjet head.. ... Riso Kagaku Corporation

Volatile semiconductor memory management device

A management device for a volatile semiconductor memory includes: a request generator configured to output a refresh request requesting a refresh operation of a target cell in the volatile semiconductor memory; and a refresh operator configured to execute the refresh operation of the target cell requested in the refresh request outputted by the request generator. The request generator repeatedly outputs the refresh request for a same target cell in the volatile semiconductor memory intermittently at unequal intervals with each two successive intervals being different from each other.. ... Riso Kagaku Corporation

Printing apparatus capable of performing printing on partially-thick sheets

A printing apparatus includes: a sheet discharge tray having an upstream portion tilted to extend downward in a direction of gravity; an upper member limiting a height of a space above the sheet discharge tray; a full sensor configured to detect an upstream end of a top sheet of sheets stacked on the sheet discharge tray; a counter configured to count a number of the sheets discharged onto the sheet discharge tray; and a controller. The controller determines whether to stop discharging of the sheets to the sheet discharge tray, based on a detection result of the full sensor upon the sheets to be stacked on the sheet discharge tray including only sheets each with uniform thickness and based on a count value of the counter upon the sheets to be stacked on the sheet discharge tray including a sheet with thickness varying partly.. ... Riso Kagaku Corporation

Image forming device

An image forming device includes an inkjet head unit, a count acquiring section, a determining section, and a head controlling section. The inkjet head unit includes an element. ... Riso Kagaku Corporation

Printing apparatus with jam release mechanism

A printing apparatus includes: a conveyor including a first pair of conveyance rollers and a second pair of conveyance rollers each configured to nip and convey a sheet; a first jam releaser configured to separate rollers of the first pair of conveyance rollers from each other; a second jam releaser configured to separate rollers of the second pair of conveyance rollers from each other; and a controller configured to control the conveyor. In stopping sheet conveyance by the conveyor upon occurrence of a failure, the controller controls the conveyor to prevent a sheet from being nipped only by the first pair of conveyance rollers prior to separation of the rollers of the first pair of conveyance rollers from each other by the first jam releaser.. ... Riso Kagaku Corporation

Printing apparatus with authentication function

A controller performs a first processing including: at a predetermined timing, determining whether a first authentication code stored in a storage of a control board attached to a first control board attachment portion matches a second authentication code stored in a storage of a control board attached to a second control board attachment portion; upon determining that the first authentication code matches the second authentication code, allowing a printer to execute a print processing; and upon determining that the first authentication code does not match the second authentication code, prohibiting the printer from executing the print processing.. . ... Riso Kagaku Corporation

Printing apparatus in communication with server via network

A controller is configured to: acquire device configuration data indicating a configuration of the printer and expendable supply data indicating a characteristic of the expendable supply; drive the communication interface to send the device configuration data and the expendable supply data to the server; drive the communication interface to receive, from the server, pattern image data and calculation program data selected by the server based on the sent device configuration data and the sent expendable supply data, the pattern image data indicating a pattern image, the calculation program data being for use to analyze the pattern image; and analyze scanned image data using the calculation program data and calculate an image adjustment value for adjusting the printer, the scanned image data being acquired by scanning the pattern image printed by the printer.. . ... Riso Kagaku Corporation

Image forming apparatus with multiple print engines for distributed processing of single print job

Upon satisfaction of a predetermined trigger condition with a first hard disk drive mounted in a first controller, a first processor executes a first common file stored in a first common file storage region and write and store a first configuration file into a first configuration file storage region. The first processor executes the first common file and the first configuration file of a first firmware program and drives a first print engine to execute a first job segment stored in a first job segment storage region.. ... Riso Kagaku Corporation

Image forming system

In execution of aligning operation in a paper discharge device, every time the number of discharged print sheets reaches the number of aligning-start print sheets, a control unit performs aligning operation while the unit intermittently drives paper feed rollers of an image forming apparatus, to prevent discharge of a print-completed print sheet to a paper discharge table during aligning operation. Further, the control unit intermittently drives an elevation unit such that the print sheet on the top of a paper discharge table is always lower than a paper discharge position of a pair of paper discharge rollers. ... Riso Kagaku Corporation

Colored resin particle dispersion

A colored resin particle dispersion having improved fixation to the printed item immediately after printing and improved color development properties for the printed item, and an inkjet ink containing the colored resin particle dispersion. The colored resin particle dispersion contains colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles contain a colorant and a (meth)acrylic-based resin, and the (meth)acrylic-based resin has a unit a having a carboxyl group, a unit b having a phosphoric acid group and/or a phosphate ester group, and a unit c having an aromatic ring.. ... Riso Kagaku Corporation

03/29/18 / #20180086096

Inkjet printing machine

A controlling unit causes a valve and a pump to perform the following operations: (i) the controlling unit closes the valve and drives the pump in initial filling of an inkjet head with ink; (ii) the controlling unit stops the pump and opens the valve on or after a time point when a tip of ink within an ink route reaches a prescribed position, which is higher than that of the ink cartridge and on an inkjet head side viewed from a joining joint part; (iii) the controlling unit closes the valve after the ink within the ink route flows backward to move air in a direct route into the ink cartridge; and (iv) the controlling unit drives the pump to fill the inkjet head with ink.. . ... Riso Kagaku Corporation

03/29/18 / #20180086095

Inkjet printing machine

A controlling unit performs the following operations: (i) the controlling unit drives a pump with a direct valve closed and an air compression valve opened in initial filling of an inkjet head with ink; (ii) the controlling unit closes the air compression valve when a tip of ink introduced in an ink route reaches a prescribed position between a joining joint part and the air compression valve; (iii) the controlling unit stops the pump and opens the direct valve after closing the air compression valve; (iv) the controlling unit closes the direct valve and opens the air compression valve after the ink, which flows backward due to restoration of compressed air between the air compression valve and the ink, moves air in a direct route into the ink cartridge; and (v) the controlling unit drives the pump to fill the inkjet head with ink.. . ... Riso Kagaku Corporation

03/22/18 / #20180084147

Image processing circuit for multi-drop inkjet head

A calculator performs in parallel gamma correction calculations on gray level values 1 to z depending on each of target nozzles for each of target pixels containing gray level values other than zero of pixels in image data to be printed by a multi-drop inkjet head including nozzles and having a maximum droplet number z per pixel, the nozzles of the multi-drop inkjet head including the target nozzles for ink ejection on the respective target pixels. A selector selects a calculation result corresponding to a gray level value of the target pixel from calculation results of the gamma correction calculations performed on the gray level values 1 to z by the calculator, for each of the target pixels.. ... Riso Kagaku Corporation

03/22/18 / #20180079854

Oil-based inkjet ink

An oil-based inkjet ink that exhibits excellent repellency by the nozzle plate, prevents degradation of the nozzle plate, reduces image show-through, and yields high image density. The oil-based inkjet ink includes an encapsulated pigment containing a pigment and a urethane compound that coats the surface of the pigment, and a non-aqueous solvent, wherein the urethane compound has a urethane skeleton and one or more side chains and is insoluble in the non-aqueous solvent, and the side chains of the urethane compound contain one or more moieties selected from the group consisting of an aromatic ring, a heterocyclic ring, a carboxyl group, an amide linkage, a fluoroalkyl group having one or more fluorine atoms, and a nitrile group.. ... Riso Kagaku Corporation

03/01/18 / #20180056677

Printer with different conveyance speeds of recording medium

A printer includes: a first conveyor configured to convey a recording medium during image formation by an image former at a first conveyance speed based on a print condition of the image formation by the image former; a second conveyor configured to convey the recording medium at a second conveyance speed higher than the first conveyance speed; and a third conveyor arranged between the first conveyor and the second conveyor on a conveyance route. The third conveyor is configured to start acceleration of the recording medium after a recording region trailing end of the recording medium passes the image former and accelerate the recording medium such that a speed of the recording medium increases to the second conveyance speed not later than a time point when a leading edge of the recording medium reaches the second conveyor.. ... Riso Kagaku Corporation

03/01/18 / #20180056672

Inkjet printing apparatus with pairs of conveyance rollers

A second inkjet head, a second platen, and a second pair of conveyance rollers configured to convey a sheet toward the second platen downward with respect to a horizontal direction are arranged at lower positions than a first inkjet head arranged upstream of the second inkjet head, a first platen arranged upstream of the second platen, a first pair of conveyance rollers arranged upstream of the second pair of conveyance rollers and configured to convey the sheet toward the first plates downward with respect to the horizontal direction, respectively.. . ... Riso Kagaku Corporation

02/01/18 / #20180030301

Aqueous inkjet ink set for textile printing and method for producing printed textile item

An aqueous inkjet ink set for textile printing is disclosed, the aqueous inkjet ink set including a first ink containing a water-dispersible resin having a glass transition point of less than −5° c., a coloring material and water, and a second ink containing a water-dispersible resin having a glass transition point of from −5° c. To 35° c., a coloring material and water. ... Riso Kagaku Corporation

01/25/18 / #20180022142

Sheet-like object

An embossment formation area is formed on one surface of envelope paper. The embossment formation area is left-right symmetric with respect to a centerline including the centerline parallel to a paper feed direction (transport direction), and is formed rearward over a predetermined length from a leading end in the paper feed direction. ... Riso Kagaku Corporation

01/25/18 / #20180022107

Multi-drop inkjet printing apparatus

A controller changes a droplet number larger than a second maximum droplet number among droplet numbers in first droplet data for each ink color to the second maximum droplet number. The controller, for each of certain pixels with a droplet number of black decreased to the second maximum droplet number, performs at least one of a first processing or a second processing. ... Riso Kagaku Corporation

11/30/17 / #20170341442

Printing apparatus with separable housings

A printing apparatus includes: a first component; a second component; a first housing configured to house the first component; a second housing configured to house the second component and movably supported on an installation surface on which the printing apparatus is installed; and a connector configured to connect the second housing openably and closably to the first housing in a horizontal direction and to allow a tilt of a turning axis of the second housing to the first housing and an upward and downward movement of the second housing to the first housing upon opening and closing of the second housing.. . ... Riso Kagaku Corporation

11/30/17 / #20170341441

Printing apparatus with access portions for access to inside of housing

A printing apparatus includes a plurality of components for the printing apparatus, and a housing configured to house the plurality of components in an inside of the housing and having a plurality of access portions used by a user and a service man to access the inside of the housing. The access portions have predetermined difficulty levels of access of accessing the inside of the housing from the access portions respectively. ... Riso Kagaku Corporation

11/30/17 / #20170341438

Inkjet printing apparatus for web being print medium

An inkjet printing apparatus includes: a print bar unit including an inkjet head configured to eject ink to a web being conveyed; and a guide configured to guide movement of the print bar unit in a print bar movement direction intersecting a conveyance direction of the web between a first position, a second position, and a third position. The first position is a position where the print bar unit performs printing on the web. ... Riso Kagaku Corporation

11/30/17 / #20170341374

Inkjet printing apparatus with wiper for inkjet head

An inkjet printing apparatus includes: a print bar unit having a print bar, a maintainer, and a movement driver; and a controller. Upon maintenance of an inkjet head of the print bar, the controller is configured to drive the movement driver to move the maintainer from a deployment position to a retreat position with the print bar arranged at a maintenance position above a height position for printing while wiping a nozzle surface of the inkjet head with the wiper of the maintainer being moved. ... Riso Kagaku Corporation

11/23/17 / #20170334670

Sheet loading device

The rotational pin and the lock pin are laterally provided in the right and left first brackets that are fixed to the right and left side surfaces of the sheet loading tray respectively, and furthermore, the right and left second brackets are fixed to the right and left of the one side surfaces of the casing. When the sheet loading tray reaches the sheet loading position, the lock pin is made to enter the sheet loading tray lock groove formed on the right and left second brackets to thereby lock and hold the sheet loading tray at the sheet loading tray storage position, along with an action of rotating the sheet loading tray about the rotational pin fitting into the sheet loading tray support groove formed on the right and left second brackets from the sheet loading position to the sheet loading tray storage position.. ... Riso Kagaku Corporation

10/05/17 / #20170282602

Conveyance apparatus of web being print medium

A conveyance apparatus includes a conveyance roller, a conveyance motor, a back tension roller, a conveyance speed detector, a brake, and a controller. The controller is configured to: based on a conveyance speed of a web detected by the conveyance speed detector, control a value of a drive control parameter of the conveyance motor such that the conveyance speed of the web is equal to a target speed; and, based on an output torque of the conveyance motor corresponding to the value of the drive control parameter, adjust a braking force of the brake applied to the back tension roller which applies a tension to the web such that the tension of the web is equal to a target tension.. ... Riso Kagaku Corporation

10/05/17 / #20170282538

Inkjet printing machine

An inkjet printing machine includes a controller and performs margin-less printing on a base material on the basis of image data having a size larger than that of the base material by discharging ink from an inkjet head while relatively moving the base material and the inkjet head for one cycle of reciprocation or more in a main-scanning direction. On the basis of the image data, the controller controls the inkjet head to stop discharging ink, when the inkjet head is moved from the outside toward an end of the base material. ... Riso Kagaku Corporation

09/28/17 / #20170274662

Thermal stencil making unit

A thermal stencil making unit that makes a stencil of a perforated image on a thermal gauze by moving a thermal print head having the plurality of heat elements relative to the thermal gauze tightly stretched in a gauze frame detachably set in a unit housing, includes a head-protecting member that moves between a protection position where the thermal print head is protected and a protection release position where a protective state is released. The thermal stencil making unit moves the head-protecting member to the protection position when the gauze frame is not set in the unit housing and moves the head-protecting cover member from the protection position to the protection release position, in conjunction with an operation of setting the gauze frame in the unit housing.. ... Riso Kagaku Corporation

09/07/17 / #20170253756

Oil-based inkjet ink set and method for producing printed item

An oil-based inkjet ink set including two or more liquid compositions, for use with an inkjet head having two or more discharge port arrays, wherein at least one of the two or more liquid compositions is an oil-based inkjet ink, the initial boiling point of each of the two or more liquid compositions is, independently, 280° c. Or higher, and the difference in the specific gravities of any pair of liquid compositions in the two or more liquid compositions is at least 0.005 but not more than 0.012, is disclosed. ... Riso Kagaku Corporation

09/07/17 / #20170253053

Printer with lower conveyer

A controller, upon remaining sheets existing in both a print conveyer and a lower conveyer and a sheet size of the sheets being equal to or larger than a specified size upon occurrence of a sheet jam: control an elevator to maintain the print conveyer at a print position, determine to position the print conveyer at a lower limit position in response to removal of the remaining sheet from the lower conveyer, and then drive the elevator to move the print conveyer to the lower limit position; or drive the elevator to move the print conveyer to the lower limit position, determine to position the print conveyer at the print position in response to removal of the remaining sheet from the lower conveyer, and then drive the elevator to move the print conveyer to the print position.. . ... Riso Kagaku Corporation

08/31/17 / #20170249110

Printing system, information processing device, and printing machine

In a printing system, a print job data generating unit of an information processing device generates print job data that includes job settings data which includes at least one of mechanical initialization information and job registration information to be used in a printing machine and which is described in a format that can be parsed without performing rip processing, and printing data in pdl format. An rip preprocessing unit of the printing machine parses the job settings data included in the print job data to obtain at least one of the mechanical initialization information and the job registration information, and performs at least one of mechanical initialization requesting based on the mechanical initialization information and job registration based on the job registration information before an rip processing unit performs the rip processing.. ... Riso Kagaku Corporation

08/31/17 / #20170249109

Image processing apparatus for print job data in pdl format

An image processing apparatus includes a processor and a memory including instructions. The instructions, when executed by a processor, cause the processor to perform operations including: receiving a print job data in a pdl format from an external apparatus; determining whether a generator of the print job data satisfies a guarantee condition guaranteeing compatibility with the image processing apparatus; upon determining that the generator of the print job data does not satisfy the guarantee condition, executing a preflight processing of checking a syntax of the print job data and then developing the print job data subjected to the preflight processing into an image data; and upon determining that the generator of the print job data satisfies the guarantee condition, skipping the preflight processing and then developing the print job data not subjected to the preflight processing into an image data.. ... Riso Kagaku Corporation

08/31/17 / #20170246873

Ink fill device, ink filling method, ink cartridge manufacturing method and ink cartridge

A joint section of a fill device is coupled to a supply opening of an ink cartridge, and a pressing force section presses an inside plug of the ink cartridge into the supply opening, to press down the inside plug against a biasing unit and release an opening to connect an ink fill section with an ink container. A first pump is operated and fills ink to the inside of the ink container. ... Riso Kagaku Corporation

08/24/17 / #20170244861

Image processing apparatus

An image processing apparatus includes an image processor that performs error diffusion processing by applying an error diffusion matrix to multi-valued image data having pixels two-dimensionally arranged, so as to convert the multi-valued image data into binary image data. The binarization unit applies an error diffusion matrix in which the diffusion coefficient of a pixel diagonal to a focused-on pixel is greater than those of other pixels.. ... Riso Kagaku Corporation

08/17/17 / #20170232758

Inkjet printer with density correction function

A controller of an inkjet printer: calculates second density correction values for respective nozzles arranged in a predetermined direction to print a second line of an image data, by using gray-level values of pixels in the second line of the image data corresponding to the respective nozzles and first density correction values for the respective nozzles to print a first line of the image data printed immediately prior to the second line; and corrects the gray-level values of the pixels in the second line of the image data corresponding to the respective nozzles, by using the calculated second density correction values.. . ... Riso Kagaku Corporation

08/10/17 / #20170225474

Ink cartridge

An ink cartridge contains an outer package, an ink container within the outer package, and sheet bodies attached to an outer surface of the outer package, and is attachable to and detachable from a printing device. Small pieces are formed by cuts in the outer package. ... Riso Kagaku Corporation

08/03/17 / #20170217706

Conveyance control device

A conveyance control device controls conveyance of a plurality of sheets including an image-formed sheet. The conveyance control device includes an obtaining unit configured to obtain display image data indicating a display image of each of the plurality of sheets; a region-specifying unit configured to specify common color regions having a common display color on the plurality of sheets based on the display image data; and a multiple feed detector configured to detect multiple feed of the sheets based on a light-receiving amount of light irradiated onto the common color regions; wherein the display image data indicating a display image of the image-formed sheet includes predetermined image data indicating a predetermined image to be previously formed and sheet image data indicating a sheet image displayed in a sheet color of the sheet.. ... Riso Kagaku Corporation

08/03/17 / #20170217196

Ink cartridge, method for tag discrimination in same, method for reproducing ink cartridge

An engagement part fitted in an outer package of an ink cartridge is provided with: a fit-in rib which is provided at a circumferential edge on a rear side and which serves as a guide upon engagement with an opening of the outer package; an engagement rib provided upright at the circumferential edge of the engagement hole in the same direction as a direction of the fit-in rib; and a bonding region for bonding a communication tag that performs near field radio communication with a printer. A tag-removing hole which is formed in the bonding region and which is to be removed from a bonding surface side of the communication tag with a bar-like member inserted is formed in a formation region as the bonding region located in a first quadrant and a fourth quadrant in an orthogonal coordinate system.. ... Riso Kagaku Corporation

08/03/17 / #20170217195

Ink cartridge

An ink cartridge includes: an ink container formed of a thermoplastic film material filled with predetermined ink; an outer package as an outer box in which the ink container is inserted; and an engagement part provided at one longitudinal end part of the ink container and engaging with a cartridge attaching mechanism of a printer. Inside an ink supply section provided at a longitudinal one end of the ink container, an inner plug is provided which closes or opens an opening of a supply opening, and a covering member protecting a shaft part of the inner plug is provided while constantly covering the shaft part regardless of sliding upon attachment and detachment of an ink cartridge.. ... Riso Kagaku Corporation

08/03/17 / #20170217159

Inkjet printing machine

A controller determines the amount of driving by a sub-scanning driver and the number of nozzles to be used in accordance with a maximum amplitude of vibration of an inkjet head in a sub-scanning direction, where the maximum amplitude is detected by a displacement detecting sensor when the inkjet head is moved in the sub-scanning direction before starting printing. Then, while moving the inkjet head in a main-scanning direction, the controller performs printing by selecting nozzles to be used in accordance with displacement of the inkjet head in the sub-scanning direction detected by the displacement detecting sensor.. ... Riso Kagaku Corporation

06/29/17 / #20170182810

Print system including multiple printers

A print system includes a first printer which performs printing on a sheet while conveying the sheet and a second printer which receives the sheet conveyed from the first printer and performs printing on the sheet while conveying the sheet. The second printer includes a second printing unit, a second registration roller, a second pre-registration roller, a sheet detector, and a second controller. ... Riso Kagaku Corporation

06/29/17 / #20170182796

Printing device

A controller in a one-side printing mode moves movable rollers to form a one-side printing route and moves a second head unit so that the second head unit faces a front side of a web. The controller then controls a first head unit and a second head unit to print images of respective pages on the front side of the web while transferring the web at a transfer speed twice as fast as that in a both-side printing mode.. ... Riso Kagaku Corporation

06/22/17 / #20170173970

Inkjet printer

A controller of an inkjet printer performs control to: during ink delivery in a first ink tank pair, as a preparation of ink delivery in a second ink tank pair, generate positive pressure and negative pressure respectively in third and fourth ink tanks of the second ink tank pair and supply ink to the second ink tank pair; and upon completion of the ink delivery in the first ink tank pair, perform printing by ejecting the ink from an inkjet head while delivering the ink between the third and fourth ink tanks of the second ink tank pair prepared for the ink delivery via an ink flow passage and the inkjet head.. . ... Riso Kagaku Corporation

06/15/17 / #20170168761

Print data generating apparatus, print data generating program, and printing apparatus

High speed print output is enabled, while eliminating the burden of rearranging printed matter in page order placed on users. A plurality of pages of print job data are divided into groups of a predetermined number of pages, and the divided plurality of pages are assigned to the print job data to generate a plurality of pieces of divided print job data. ... Riso Kagaku Corporation

06/01/17 / #20170155789

Image reading apparatus

An image reading apparatus includes a light emitting element, a luminance calculating unit, a light amount setting unit, and a storing unit. The light amount setting unit, in each line period, causes the light emitting element to emit a light with gradually changing a reference light amount from a reference light amount set as a default value from among a plurality of reference light amounts stored in the storing unit, identifies a reference light amount so that the luminance calculated by the luminance calculating unit is within a predetermined range, sets the identified reference light amount as a default value for the next line period, and causes the storing unit to store that reference light amount.. ... Riso Kagaku Corporation

06/01/17 / #20170151820

Printing system

When it is determined by the post-process determination unit that a received top job requires a bookbinding process (post-process) and that a received subsequent job does not require a bookbinding process (post-process), the sheet setting determination unit determines whether or not there is a match between the sheet size (sheet setting) of the top job and the sheet size (sheet setting) of the subsequent job, and when it is determined by the sheet setting determination unit that there is a match between the sheet size (sheet setting) of the top job and the sheet size (sheet setting) of the subsequent job, the execution management unit causes the printing machine to perform the printing process on the basis of the subsequent job during the warm-up of the bookbinding device.. . ... Riso Kagaku Corporation

06/01/17 / #20170151817

Inkjet printing machine

The inkjet printing machine includes a controlling unit, an inkjet head including a plurality of nozzles, and a head elevating motor that causes the inkjet head to move up or down. The controlling unit causes, while the inkjet head is being moved in a main-scanning direction, the head elevating motor to move the inkjet head up or down depending on unevenness of a surface of a printing medium, selects a nozzle from the nozzles depending on a distance between the inkjet head and the surface of the printing medium at a position of each of the nozzles, and performs printing by using the selected nozzle.. ... Riso Kagaku Corporation

05/04/17 / #20170124436

Image forming apparatus using drawing data described in pdl

An image forming apparatus: upon determining that or drawing of a first drawing object and a second drawing object included in received drawing data is not possible, drives one of a plurality of arithmetic processors to sequentially execute a first drawing process of the first drawing object and a second drawing process of the second drawing object in an original order of the first drawing object and the second drawing object in commands of the received drawing data; and, upon determining that the or drawing is possible, distributes and assigns the first drawing process and the second drawing process to two or more of the plurality of arithmetic processors and drives the two or more arithmetic processors to execute the first drawing process and the second drawing process in parallel.. . ... Riso Kagaku Corporation

04/27/17 / #20170118381

Image processing method and image processing device for gray output signal

An image processing method comprising: converting an rgb input signal to a cmyk signal; converting the rgb input signal to a common color signal including lightness; generating a first gray signal including a gray value substituted for cmy values forming gray in the cmyk signal; generating a second gray signal including a gray value corresponding to a k value greater than a threshold in the cmyk signal; generating a gray output signal in a cmykgray output signal indicating color material amounts of cyan (c), magenta (m), yellow (y), black (k), and gray (gray) for printing by multiplying the generated first gray signal and the generated second gray signal respectively by coefficients corresponding to the lightness in the common color signal and then synthesizing the first gray signal and the second gray signal.. . ... Riso Kagaku Corporation

03/30/17 / #20170087881

Inkjet printer

An inkjet printer includes: a printing unit including an inkjet head and configured to eject an ink from the inkjet head while conveying a sheet in a conveying direction along a printing route to perform printing on the sheet; and a downstream side conveyor arranged downstream of the printing unit in the conveying direction and including a guide defining a downstream conveyance route being a space for the sheet to be conveyed. The downstream side conveyor is configured to convey the sheet along the downstream conveyance route. ... Riso Kagaku Corporation

03/30/17 / #20170087849

Inkjet printer

An inkjet printer includes plural inkjet heads that are aligned in a head alignment direction to form a head row, a blower that blows air to the head row from one side along the head alignment direction, and an aspirator that is disposed on an extended line of the head row and on the other side along the head alignment direction for aspirating air through its aspirator port. The aspirator includes a tubular duct that extends from the aspirator port toward the head row.. ... Riso Kagaku Corporation

03/09/17 / #20170070645

Image processing apparatus for monochrome conversion and image forming apparatus including the same

An image processing apparatus performs operations including: when a density value of a black component in uncorrected monochrome image data corresponding to each of pure colors including primary colors and secondary colors in color image data is lower than a reference density value, the uncorrected monochrome image data being obtained by a monochrome conversion from the color image data to monochrome image data, determining a correction content for correcting the density value of the black component in the uncorrected monochrome image data corresponding to at least each of the pure colors out of the pure colors and peripheral colors of the pure colors in a color space to a value equal to or higher than the reference density value; and obtaining corrected monochrome image data in which correction based on the determined correction content is reflected in the uncorrected monochrome image data.. . ... Riso Kagaku Corporation

02/23/17 / #20170050440

Inkjet printing machine and ink cartridge

There are provided: a maintenance unit that performs a maintenance operation simultaneously on the plurality of inkjet heads, a memory that stores, for each of ink types, a settable range of a maintenance cycle of a maintenance operation as maintenance information; and a controller that reads, from the maintenance information stored in the memory, lower limit values and upper limit values settable ranges) corresponding to table numbers stored in the memories of all the ink cartridges all the ink cartridges when a user maintenance cycle having been stored in the memory is set, and that causes the maintenance unit to perform a maintenance operation with the user-set maintenance cycle being the maintenance cycle when the user-set maintenance cycle is within the read-out settable ranges for all the ink types.. . ... Riso Kagaku Corporation

02/02/17 / #20170034386

Image scanning apparatus

An image scanning apparatus performs operations including: upon detection of a first angle, causing light to be emitted to an original and recording a distribution of reflected light of the emitted light as first read data; upon elapse of a predetermined time from detection of a second angle, causing light to be emitted to the original and recording a distribution of reflected light of the emitted light as second read data; detecting a closed state of a pressure plate based on the second read data; and upon determination of an angle of the pressure plate with respect to the platen being equal to or smaller than a third angle smaller than the second angle in the detection of the closed state, detecting a width of the original in an opening-closing direction of the pressure plate based on a difference between the first and second read data.. . ... Riso Kagaku Corporation

02/02/17 / #20170028755

Inkjet printer for continuous paper

A controller drives a conveyer to start to convey a sheet of continuous paper and accelerates the sheet to a printing conveyance speed, and drives an inkjet head to start to perform a printing while driving the conveyer to convey the sheet at the printing conveyance speed. The controller drives a tension adjuster to adjust a tension of the sheet such that the tension of the sheet during acceleration after start of conveyance of the sheet is smaller than the tension of the sheet during the printing, and drives the head gap adjuster to adjust a head gap between the inkjet head and the sheet such that a first head gap during the acceleration of the sheet is greater than a second head gap during the printing.. ... Riso Kagaku Corporation

01/19/17 / #20170015854

Inkjet ink

An inkjet ink is provided which preferably having a small particle size and excellent intermittent dischargeability. Moreover, the inkjet ink is provided which preferably improving the storage stability of the inkjet ink, and printing a printed item having excellent rub fastness. ... Riso Kagaku Corporation

01/19/17 / #20170015793

Colored resin particle dispersion, method for producing same, and inkjet ink

A colored resin particle dispersion and an inkjet ink are provided which preferably exhibit excellent rub fastness and alcohol resistance, and yield printed items having high image density. Specifically, a colored resin particle dispersion includes colored resin particles, a basic dispersant and a non-aqueous solvent. ... Riso Kagaku Corporation








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