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7614717 |
Pen fault check circuit for ink jet printer
A pen fault check circuit for an ink jet printer that includes a comparator that further includes a pen signal input, and a switch array coupled to the pen signal input, where the switch array...
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7614714 |
Liquid application device and ink jet recording apparatus
The present invention provides an inkjet recording apparatus and a recording apparatus capable of reducing wear of a roller for application, even if liquid (for example, application liquid) is...
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7611214 |
Liquid ejecting apparatus
A liquid ejecting apparatus includes: a head having a nozzle; a pressure-changing unit for changing pressure of liquid in the nozzle in such a manner that the liquid is ejected from the nozzle; a...
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7607773 |
Inkjet recording apparatus
The inkjet recording apparatus comprises: a head which ejects ink droplets of light-curable ink to a print medium to form an image on the print medium; a light irradiating device which is located...
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7604311 |
Droplet ejection device and droplet ejection method
In a droplet ejection device, a latch circuit acquires discharge data in which a resolution is set up for each resolution section in a transport direction of a recording medium, and sets data...
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7599096 |
Tint adjustment for monochrome image printing
On the basis of a standard one-dimensional LUT 412 , a plurality of one-dimensional LUTs 413 having mutually different tones are generated. Next, a plurality of monochrome sample images are...
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7591519 |
Liquid droplet ejection apparatus and image forming apparatus
The liquid droplet ejection apparatus includes a droplet ejection control device controlling droplet ejection whereby droplets of liquid are ejected from ejection heads (“heads”) towards an...
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7588320 |
Droplet ejection device and method using electrostatic field
Disclosed are a droplet ejection device and method using an electrostatic field. The droplet ejection method includes: setting a separate electric field direction in each of a plurality of nozzles;...
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7585042 |
Printing up to edge of printing paper without platen soiling
Using a printer having a recessed portion, printing up to the edge of printing paper is performed without depositing ink drops on the platen. Printing paper P is advanced by upstream paper feed...
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7585040 |
Printing apparatus and printing method
A printing apparatus divides printing elements of a printhead into blocks, time-divisionally drives the printing elements, and prints a halftone image on a printing medium in accordance with a...
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7575301 |
Image forming apparatus and image forming method
The image forming apparatus comprises: an ejection head which ejects droplets having electro rheological effects onto a recording medium; a holding device which holds the recording medium, the...
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7575293 |
Dual drop printing mode using full length waveforms to achieve head drop mass differences
A dual-drop mode for a printer uses at least two full length waveforms and switches between the waveforms according to one or more patterning methodologies to print a page length document having a...
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7570392 |
Error diffusion method and apparatus using weighted vectors along a diagonal to correct for non-ideal ink ejection
A device including: an acquirer acquiring image data having an M-value (M≧3) pixel value; a memory storing nozzle information; another memory storing error diffusion matrices having different...
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7568776 |
Recording apparatus
A serial signal for generating a plurality of recording waveform signals is transmitted serially from a signal transmission circuit to a head river. A serial-parallel converting circuit parallely...
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7566182 |
Printhead that uses data track for print registration on print medium
A mobile device for printing onto a print medium, the print medium including a linear-encoded data track extending in an intended direction of printing, the mobile device including: a sensor...
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7566107 |
Image forming apparatus
The image forming apparatus includes a liquid ejection head and an ejection control device. The liquid ejection head includes: a large nozzle and a small nozzle performing ejection of droplets of...
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7559626 |
Inkjet recording head substrate and drive control method, inkjet recording head, inkjet recording head cartridge and inkjet recording apparatus
An inkjet recording head substrate having an electrothermal transducer for generating thermal energy used to discharge ink and a drive element for driving the electrothermal transducer mounted...
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7559617 |
Printer
A printer for printing on a medium on an endless belt by printer heads includes: a generator generating printing data for each printer head; a detector detecting time-series data for the meandering...
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7556327 |
Charge leakage prevention for inkjet printing
Charge leakage prevention and voltage drift prevention on a droplet ejection device for an inkjet printer. In one method to prevent charge leakage on a droplet ejection device with a switch and a...
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7556326 |
Ink level sensor and method of use
An ink level sensing system and method of sensing that includes a lower probe positioned in a lower portion of an ink reservoir, an upper probe positioned above the lower probe and extending upward...
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7554690 |
Array type inkjet printer system including print head, resolution adjusting unit, rendering unit and scaler
An array type inkjet printer system having a print head with a plurality of nozzles formed therein in the horizontal scan direction includes a resolution adjusting unit for reducing a resolution in...
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7552984 |
Inkjet recording apparatus and inkjet recording method
An inkjet recording apparatus includes a recording head having a nozzle array of plural nozzles capable of discharging ink. The inkjet recording apparatus performs a scanning/recording operation...
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7549716 |
Method of ejecting microdroplets of ink
The method of ejecting microdroplets of ink includes a first step for generating one ink column on the outside of the nozzle and for separating a tip end of the one ink column from a remaining part...
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7549715 |
Printer controller for causing expulsion of ink from nozzles in groups, starting at outside nozzles of groups
A printer controller for supplying one or more control signals to a printhead module, the printhead module including at least one row that comprises a plurality of sets of n adjacent nozzles, each...
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7547084 |
Wide array fluid ejection device
A fluid ejection device includes a first set of N memory elements each storing a fire enable value, each of the N memory elements configured to be updated. The fluid ejection device further...
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7547083 |
Ink jet printer with a plurality of printhead control units
An ink jet printer includes a printhead drive unit and a cartridge. The cartridge includes the printhead controller. The printhead controller includes a plurality of inverters connected in series...
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7543903 |
Image-forming device diagnosis
A method for diagnosing image-forming devices includes forming a non-diagnostic image on a surface, forming diagnostic marks on the surface using distinct image-forming points and sensing the...
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7537308 |
Data processing method and ink jet printing apparatus
A method is provided which is intended to reduce a visibility of ink dots ejected onto a print medium during a preliminary ejection operation to produce a satisfactory printed image. Preliminary...
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7537299 |
Liquid ejection apparatus, drive signal application method, and liquid ejection method
The liquid ejection apparatus includes: (A) a drive signal generation section generating first and second drive signals to be applied to an element that can execute a liquid-ejection operation; (B)...
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7537298 |
Printing apparatus, printing method, and program for black pigment and dye ink
According to the present invention, if an image is printed on both sides of a printing medium, the possibility of rubbing ink off from the printing medium is minimized to inhibit contamination of...
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7533950 |
Liquid jet recording apparatus
A liquid jet recording apparatus is provided in which liquid droplets are jetted from liquid jetting orifices.
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7530654 |
Liquid ejection apparatus, liquid ejection method, and printing system
The liquid ejection apparatus includes: a head having a plurality of nozzles each for ejecting a liquid droplet, and a plurality of elements each provided in correspondence with a respective one of...
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7530653 |
Recording head and recorder comprising such recording head
A recording head having a plurality of recording elements comprises a plurality of switching elements, each provided in correspondence to each of the plurality of recording elements, constant...
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7527345 |
Print controller, method and program for print control, color conversion table, and method for determining ink quantity
When colored inks and a clear ink are recorded, the printing medium tends to undulate and blotting of ink can occur. Thus, it is difficult to obtain favorable picture quality under various printing...
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7524013 |
Image forming apparatus and nozzle restoring method
The image forming apparatus comprises: a liquid droplet discharge head which has a plurality of first nozzles that discharge liquid droplets onto a recording medium to perform an image recording,...
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7524007 |
Printhead having sequenced nozzle firing
A printhead is provided having at least one row that comprises a plurality of sets of n adjacent printing nozzles. Each nozzle is configured to expel ink in response to a fire signal, such that,...
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7520579 |
Image forming apparatus having droplet speed control
An image forming apparatus includes a recording head, and a drive pulse generator. The recording head includes a nozzle to discharge a droplet of recording liquid, a pressure-generating room to...
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7517039 |
Enabling increased print speed by eliminating nozzle firing sequencing
The velocity of a printhead scanning across a sheet of paper or other print medium is varied on the basis of whether masking patterns for selectively activating nozzle of the printhead include...
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7517036 |
Printhead module capable of printing a maximum of n channels of print data
A printhead module capable of printing a maximum of n of channels of print data, the printhead being configurable into:
a first mode, in which the printhead is configured to receive print...
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7513585 |
Printhead, printhead cartridge, printing apparatus, and element substrate of printhead
A voltage supplied to each printing element can be stabilized even when a number of concurrently driven printing elements varies. A printhead with a plurality of printing elements includes a...
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7510258 |
Method of detecting the alignment of printheads in a printer
A method and system for detecting the alignment of print heads relative to one another in an ink jet printer having a plurality of print heads arranged side-by-side in a first direction (Y) on a...
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7510252 |
Method of hiding inkjet printhead die boundaries
Methods are disclosed for reducing visible print defects in printers having multi-die printheads oriented substantially perpendicular to the print media path. The exemplary methods include...
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7506947 |
Ink jet printing apparatus and method using media shape detection
An ink jet printing method and an ink jet printing apparatus are provided which minimize an area to be printed that overruns from edge portions of the print medium, even for an irregular-shaped...
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7503632 |
Head substrate having data memory, printing head, printing apparatus and producing method therefor
There is disclosed a head substrate of a printing head detachably mounted on a printer main body, comprising plural external connection terminals individually receiving, from the exterior, a binary...
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7497534 |
Enhancing angular position information for a radial printing system
Methods and apparatus for radially printing onto a rotating media are disclosed. Techniques and mechanisms are used to receive a pulse train frequency source signal in generating a rotation index...
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7494204 |
Correction of paper feed error during interlace printing using a representative correction value
A technique for improving image quality by correcting a paper feed error in a printer is provided. First, a test pattern is printed using one representative feed amount that is to be used in...
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7494202 |
Image forming apparatus and a sub-line control section for an image forming apparatus
What is disclosed is an image forming apparatus to form each of lines formed with different sizes of dots, comprising: a print control section to control printing by providing elements for...
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7494200 |
Recording apparatus and recovery control method
A control method at the time of preliminary ejection of ink is changed between a recording area in which a nozzle used for recording is not switched every recording scanning and a recording area in...
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7494199 |
Head control device and image recording apparatus
There is provided a head control device able to re-charge an electromechanical transducing element with a driving pulse without requiring an additional re-charging time period in a recording...
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7490930 |
Inkjet recording apparatus and inkjet recording method
An inkjet recording apparatus, includes: a black ink ejecting portion configured to eject a black ink containing a self-dispersion pigment; color ink ejecting portions configured to eject,...
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