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6412909 |
Printing device
The invention comprises a printing device wherein a head comprising a plurality of nozzles at a predetermined pitch is used for repeated primary scanning and sub-scanning to print images. The...
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6406111 |
Method of increasing the resolution of an ink jet printer
A method is provided for printing a pixel image using an ink jet printer having a first resolution along a first axis and a second resolution along a second axis. A resolution of the pixel image is...
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6406114 |
Tonal product recorded by ink and having a plurality of pixels with plural tonal levels
A liquid ink jet recording apparatus and method which forms a multi-level tonal image by liquid droplets discharged through plural nozzles. A first scan of a recording head past a recording...
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6406127 |
High productivity/multipass/ink printing system and method
Methods and systems for an ink printing system with a printhead system comprising at least two printheads with one printhead adjacent to a second printhead, the two printheads spaced such that the...
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6398342 |
Open jet compensation during multi-pass printing
A method and system for compensating for nonfunctional ink jets in an ink jet printer. The ink-jet printer includes a printhead having a plurality of ink jets, each ink jet being assigned to print...
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6388690 |
Thermal recording apparatus
Every time after a cyan ink and a magenta ink are transferred to form respective color dots of a line with a length L 2 in a sub-scanning direction, an ribbon cassette RC is returned to a start...
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6378982 |
Printing apparatus and a printing method
In a multipass printing using a print head which has a plurality of staggered columns of print elements, one and the same print line is formed by using nozzles (k 1 - 129 , k 2 - 1 ) of different...
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6375307 |
Printing apparatus and method
An inkjet printer prints swaths which overlap by, typically, one eighth of their width at each edge, each edge region having a reduced print density so that the combined density of the overlapping...
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6375294 |
Gray scale fluid ejection system with offset grid patterns of different size spots
A fluid ejection system and method for variable density pattern forming by producing a plurality of large, mid-sized and small spots. The plurality of large, mid-sized and small spots are produced...
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6373593 |
Printer which accommodates carriage speed non-uniformities
Printing which accommodates carriage speed non-uniformities by allowing both forward and reverse printing despite the presence of ringing and other overshoot anomalies in carriage printing speed. A...
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6371609 |
Recording apparatus and a recording method
A recording apparatus and a recording method for controlling and driving a recording head so that an image region formed by a first ink is located between alternate image regions formed by a second...
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6361144 |
Reduction of intercolor or bleeding in liquid ink printing
The present invention is directed to a method for processing color image data to reduce intercolor bleeding in an image printed on a receiving medium. The method begins with the receipt of a target...
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6357856 |
Printing with a vertical nozzle array head
In monochromatic printing, a recording method for middle area processing is utilized in the middle portion of the recording execution area, and bottom processing, in which the sub-scanning feed...
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6354692 |
Method and apparatus for minimizing color hue shifts in bi-directional inkjet printing
The present invention is a single-pass, bi-directional printer where two color maps are being employed. One color map is used for left to right printing and the second color map is used for...
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6341840 |
Method of printing a substrate and a printing system containing a printing device suitable for use of the method
A method and system for printing a substrate with an inkjet printing device provided with at least one printhead comprising at least one row of nozzles having a first end and a second end, such...
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6338544 |
Reduction of stitch joint error by alternating print head firing mode
An apparatus and method for forming an image with a print head that fires groups of drops of fluid results in a reduction in stitch joint error. The stitch joint error is reduced by changing the...
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6336703 |
Printer, printing method, and recording medium
An inkjet printer uses interlaced printing to form raster lines at intervals in the sub-scanning direction. The paper is transported by feed rollers on the upstream side relative to the...
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6328406 |
Image recording method
Disclosed herein is an image recording method capable of greatly increasing a record data processing speed and thereby performing high-speed recording. According to the image recording method, a...
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6328419 |
Dot printing using partial overlap scheme
A print head has a nozzle array to achieve printing of dots of identical color along a plurality of main scanning lines during a main scanning pass, and to achieve formation of multiple dots of the...
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6325487 |
Systems and methods for generating high addressability images
Image systems and methods generate improved high addressability images. The generated image may be input into a printer for printing. An image is processed so that the location of an ink drop in a...
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6325489 |
Ink-jet printing apparatus
A recording head is so designed that a plurality of nozzle openings for each of the nozzle opening arrays are arranged at intervals of at least four or more print-pitches in the sub-scanning...
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6322197 |
Printing method and apparatus
In a printing method which can suppress half band irregularity caused by 2-pass printing and implement high-image-quality printing, image data is distributed into two sets of data for front and...
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6318827 |
Method of improving print quality by selectively changing print direction
An ink jet printer wherein unidirectional or bidirectional printing is adaptively selected for predetermined print modes as a function of whether bidirectional alignment has been performed.
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6315380 |
Ink jet head having operating characteristic information, and recording apparatus using such a head
An ink jet recording apparatus includes a feeder for feeding a recording medium; a carriage reciprocally movable relative to the recording medium; an ink jet recording head detachably mountable on...
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6312098 |
Banding reduction in incremental printing, through use of complementary weights for complementary printhead regions
A structure of bands is associated with printhead-array image-forming elements, forming a printmask. Some band pairs are complementary. A low usage percent is stated for at least one band and a...
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6310640 |
Banding reduction in multipass printmodes
A swath printer and multipass printing method for improving print quality. The printer minimizes dot placement errors on a printed medium due to depositing drops of ink from lower quality printhead...
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6309041 |
Odd number of passes, odd number of advances, and separated-diagonal-line masking, in liquid-ink printers
Methods of printing a desired color image on a printing medium by construction from individual ink drops deposited in pixel arrays includes passing a multiple-nozzle ink-discharging pen or an odd...
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6310638 |
Carriage bearing preloader and antirotation restoring force for reducing carriage vibration
A carriage, driven along a carriage rod, rests on the carriage rod at carriage V-bearings. The V-bearing connection is open at the bottom. A magnetic preloader applies a magnetic force biasing the...
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6302517 |
Printing apparatus and printing method using multiple nozzle groups
A print head 2 has multiple nozzle groups 2a, 2b spaced apart in the sub-scanning direction by a prescribed inter-group distance pn i . Each nozzle group 2a, 2b has multiple nozzles aligned in the...
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6299283 |
Dot recording using plural sub-scan feed amounts
Integers that are no less than 2 and relatively prime are selected for the nozzle pitch k and the number of effective nozzles Neff which represents the net number of raster lines in a main scanning...
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6293643 |
Printing apparatus, printing method, and recording medium
The printing apparatus of the present invention adopts the technique of effectively utilizing two or more different types of dots having different ink densities and different ink weights. The...
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6293651 |
Multi-head printer
To provide an inexpensive printer capable of printing a high-resolution print data item at high speed. A multi-head printer, wherein taking a pitch at which the printing elements are moved in the...
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6290327 |
Image-forming device and printing apparatus incorporating the device as well as image-forming method therefor
There are provided an image-forming device and method for varying an elongation rate of a basic image in at least one of a direction of length of the basic image and a direction of width of the...
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6290328 |
Multi-pass banded printing
A method for printing raster data on a recording medium using a plurality of ink jet nozzles includes assigning first raster data of a first set of rasters to the plurality of ink jet nozzles for...
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6278469 |
Customizing printmasks for printhead nozzle aberrations
An inkjet printer and printing method for improving print quality. The printer minimizes the visually perceptible effect of dot placement errors, dot size errors, and dot shape errors on a printed...
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6273549 |
Multiple pass color shift correction technique for an inkjet printer
In one embodiment of the present invention, for a two-pass print mode, instead of two or more color printheads depositing the same amount of ink for each pass, one of the passes (the primary pass)...
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6273548 |
Method and circuit for controlling nozzle heads in inkjet printers, in particular nozzle heads of piezoelectric device type
A circuit for controlling nozzle heads in inkjet printers includes a first plurality of nozzles disposed in a row forming an angle relative to a horizontal and to a line direction, respectively,...
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6270186 |
Reduction of intercolor bleeding in liquid ink printing
The present invention provides a method for processing color image data for printing on an inkjet printer to reduce intercolor bleeding in an image recorded on a receiving medium. The method...
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6264298 |
High frequency shingled multiple drop per pixel ink overprinting method
A method of printing an image on a recording medium with a liquid ink printhead moving in a scanning direction having drop ejectors depositing ink drops on a recording medium at a given default...
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6260939 |
Tone recording method using ink jet recording head that records pixels using a plurality of liquid droplets
A liquid jet recording method of recording on a recording material with liquid droplets discharged trough plural scanning nozzles, in which: n/(s/p)≥2 n/(s/p)×k=g-1 are satisfied, where n...
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6260946 |
Multifunction printing device capable of selecting printing method according to free space in memory
In order to select an interlace printing method, first, a resolution for a video print process is specified. Next, the actual amount of the free space in the shared area 33b of the RAM is detected....
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6250734 |
Method and apparatus for printing with different sheet feeding amounts and accuracies
In an inkjet printer controlled by a program in a recording medium, the interlace method is applied to record an image in a first area where the rollers in the feeding section ensure the accuracy...
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6250739 |
Bidirectional color printmodes with semistaggered swaths to minimize hue shift and other artifacts
Bidirectional scanning printheads discharge color-ink drops at ultrahigh resolution while scanning in each direction, to form color swaths on a print medium. The heads are at least partially...
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6247788 |
Inkjet recording apparatus and method for preventing generation of unevenness in density of a recorded image
An inkjet recording apparatus and method reduces band-like unevenness in a recorded image which unevenness is generated in relation to an interlace printing method. A recording head has a plurality...
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6238037 |
Method of multi-dot interlace printing
A method of performing interlace printing on a print medium with a printhead of an ink jet printer includes providing an array of pixel locations on the print medium. Each pixel location has a...
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6217142 |
Ink jet recording system using decomposed images
An image corresponding to a single sheet of recording paper is divided into three decomposed images each having the substantially same expansion as that of the image, and one of the decomposed...
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6217148 |
Method for operating an ink jet printer
A method of operating for an ink jet printer having a printer head bearing a plurality of equi-distantly spaced ink jets for printing parallel lines of dots on a substrate in n passes of the print...
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6213585 |
Image formation apparatus
Provided is an image formation apparatus for printing pixel dots on a recording paper at pitches smaller than intervals between ink jet-out ports by using an ink jet recording head while moving the...
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6206502 |
Printing method and printing apparatus
A printing apparatus and a printing method which eliminate a problem of boundary stripes by taking advantage of features of the multipass printing performed by the printing apparatus without...
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6203140 |
Method of compensating for the failure of a dot generating unit in a printing system
A method of compensating for the failure of a dot generating unit in a printing system including a multiple-unit printhead scanning an image receiving medium in line direction and capable of...
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