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公开(公告)号：US20190248153A1
公开(公告)日：2019-08-15
申请号：US16272064
申请日：2019-02-11
发明人： JOHANNES MUEHL , HANS KOEHLER , ROLAND STENZEL , ANDREAS HENN , MARTIN MAYER , STEFFEN NEEB , FRANK MUTH , JAN KRIEGER , NICKLAR RAYMOND NORRICK , MINA ABOSETTA
IPC分类号： B41J2/21 , H04N1/401 , B41J29/393
CPC分类号： B41J2/2142 , B41J2/16579 , B41J2/16585 , B41J2/2139 , B41J2/2146 , B41J29/393 , B41J2025/008 , B41J2029/3935 , H04N1/4015
摘要： A method for detecting defective printing nozzles in an inkjet printing machine includes printing a multi-row printing nozzle test chart formed of horizontal rows of equidistant vertical lines periodically underneath one another, with only printing nozzles in a print head contributing to every row of the test chart corresponding to the horizontal rows. An area coverage element geometrically associated with the test chart is printed, both elements are recorded by an image sensor and analyzed by the computer. The computer analyzes the recorded area coverage element to detect print defects and allocates defects to a region of geometrically close printing nozzles. An analysis of the test chart in the region identifies nozzles causing the defect. Defective printing nozzles are detected based on thresholds, the detected printing nozzles are then compensated, and in the analysis of the recorded area coverage element, influences of the sensor are eliminated by shading correction.
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2.发明申请公开(公告)号：US20190240989A1
公开(公告)日：2019-08-08
申请号：US16192035
申请日：2018-11-15
发明人： ILIAS TRACHANAS , AXEL HAUCK
CPC分类号： B41J2/2142 , B41J2/195 , B41J2/2139 , B41J2/2146 , B41J2025/008 , G06K15/102 , G06T7/001 , G06T2207/30144
摘要： A method for detecting and compensating for defective printing nozzles in an inkjet printing machine by using a computer, includes shrinking the height of a digitally available image to the image height of a print control strip by using the computer while the image width remains uninfluenced, printing the shrunk digital image onto a printing substrate, recording the printed shrunk digital image by using at least one image sensor, comparing the recorded image with the shrunk digital image by using the computer, detecting defective printing nozzles for the digital image by using the computer based on the comparison and compensating for the detected defective printing nozzles. The digital image is printed onto the following printing substrate by using defective printing nozzle compensation.
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公开(公告)号：US20190070848A1
公开(公告)日：2019-03-07
申请号：US16110126
申请日：2018-08-23
发明人： ILIAS TRACHANAS , MARTIN MAYER , PETER HACHMANN
IPC分类号： B41J2/045
CPC分类号： B41J2/0451 , B41J2/04586 , B41J2/04593 , B41J2/2139 , B41J2/2146 , B41J2025/008
摘要： A method corrects for defective printing nozzles in an ink jet printing machine via a computer. The defective printing nozzles are compensated for after the screening process by neighboring printing nozzles applying an increased amount of ink. The method includes precalculating different compensation halftones for different area coverages by the computer, printing the compensation halftones embedded in area coverage halftone areas, evaluating the printed compensation halftones via the computer, and selecting and saving, for every area coverage level, the compensation halftone that best matches the coloration of the original halftone in the respective area coverage halftone area. A defective printing nozzle is detected during production printing by the computer. The local area coverage is determined along the detected defective printing nozzle by the computer. The compensation halftone that has been saved for the determined local area coverage is used to compensate for the defective printing nozzles via the computer.
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公开(公告)号：US20190009567A1
公开(公告)日：2019-01-10
申请号：US16022433
申请日：2018-06-28
发明人： Arihito Miyakoshi , Masahiko Kubota , Yusuke Imahashi , Hiroshi Arimizu , Yoshinori Itoh , Hideo Sugimura , Takashi Horiba , Akira Fujikake
CPC分类号： B41J2/185 , B41J2/16552 , B41J2/1714 , B41J2/18 , B41J2002/1853 , B41J2025/008 , B41J2202/21
摘要： A collection unit configured to collect ink mist generated due to a discharge of ink from a head configured to discharge the ink includes a filter for capturing the ink mist and a liquid supply portion configured to supply a liquid to the filter.
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公开(公告)号：US20180361731A1
公开(公告)日：2018-12-20
申请号：US16005521
申请日：2018-06-11
发明人： Rinako Kameshima , Minoru Teshigawara , Yoshiaki Murayama , Masaki Nitta , Eisuke Nishitani , Keiichirou Takeuchi
CPC分类号： B41J2/0057 , B41J2/2114 , B41J2/2146 , B41J2025/008 , B41M5/0011 , B41M5/0256 , B41M5/03 , B41M7/0018
摘要： A recording apparatus includes an ink application unit configured to apply ink to a transfer body, a first application unit configured to apply a first treatment liquid over an area on the transfer body, a second application unit configured to apply a second treatment liquid to the transfer body, a heating unit configured to heat the second treatment liquid applied to the transfer body, and a transfer unit configured to transfer the ink image, wherein a ratio of the second treatment liquid to the first treatment liquid on an outside of ink portion is determined according to the recording medium.
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公开(公告)号：US20180288277A1
公开(公告)日：2018-10-04
申请号：US15938033
申请日：2018-03-28
发明人： DIRK KIRCHHOFF , BERND STRITZEL , MICHAEL KAISER
CPC分类号： H04N1/4057 , B41J2/2132 , B41J2/2146 , B41J2025/008 , H04N1/407 , H04N1/52
摘要： A method for compensating tone value fluctuation in inkjet printing includes generating multi-bit halftone images of pixels on a computer during prepress screening for color separations with multiple tone values out of print image data, forwarding multi-bit halftone images to a control unit of an inkjet printing machine, and printing the multi-bit halftone on the machine, wherein encoded binary values of multi-bit halftone images correspond to ink drop sizes to be generated by the machine. The computer introduces additional binary values of multi-bit halftone images not corresponding to ink drop sizes in pixel positions of multi-bit halftone images where occurring tone value fluctuations are to be compensated for by modified ink drop sizes, causing additional binary values to be ignored by the machine in a regular print mode, and assigning additional binary values to modified ink drop sizes in a correction print mode.
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7.发明申请公开(公告)号：US20180162134A1
公开(公告)日：2018-06-14
申请号：US15836962
申请日：2017-12-11
发明人： WOLFGANG GEISSLER , MARTIN MAYER , FRANK MUTH , HANS KOEHLER
CPC分类号： B41J2/16579 , B41J2/2139 , B41J2/2142 , B41J2/2146 , B41J2025/008
摘要： A method for detecting and compensating for failed printing nozzles in an inkjet printing machine by using a computer, includes printing a current print image, recording the printed print image by using an image sensor and digitizing the recorded print image by using the computer, adding digitized color values of the recorded print image of every column over the entire print image height and dividing the added-up color values by the number of pixels to obtain a column profile, subtracting an optimized column profile without failed printing nozzles from the original column profile to obtain a differential column profile, setting a maximum value threshold defining a failed printing nozzle when exceeded, applying that maximum value threshold to the differential column profile to obtain a resultant column profile every maximum of which marks a failed printing nozzle. The marked printing nozzles are compensated in a subsequent printing operation.
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公开(公告)号：US20180104951A1
公开(公告)日：2018-04-19
申请号：US15714092
申请日：2017-09-25
发明人： Yoshiaki Kaburagi , Kazuya Koizumi
CPC分类号： B41J2/04573 , B41J2/04543 , B41J2/04563 , B41J2/0458 , B41J2/04586 , B41J2/04591 , B41J2/2135 , B41J13/02 , B41J29/393 , B41J2025/008
摘要： The printing apparatus includes: a time-division driving unit configured to divide a plurality of printing elements into a plurality of blocks, and between a target reference signal and the next reference signal, drive the plurality of printing elements at a time interval for each of the blocks on a basis of the target reference signal to thereby perform one column of printing, wherein the time-division driving unit drives, in a case where in a first column, a time after the target reference signal is acquired and until the next reference signal is acquired is shorter than a time required for one column of printing, the plurality of printing elements so that a time required for printing the second column in which the next printing is performed becomes shorter than a time required for one column of printing in the first column.
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公开(公告)号：US09889644B2
公开(公告)日：2018-02-13
申请号：US15465800
申请日：2017-03-22
发明人： Peter Hachmann
IPC分类号： B41J2/045
CPC分类号： B41J2/04556 , B41J2/04585 , B41J2/2139 , B41J2/2146 , B41J13/223 , B41J2025/008
摘要： A method for printing on sheets in an inkjet process using nozzles includes transporting the sheets on a drum. When the nozzles are actuated by a computer, banding defects are compensated for and the computer factors in or takes into consideration thermal properties of the drum as it actuates the nozzles.
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公开(公告)号：US20170341383A1
公开(公告)日：2017-11-30
申请号：US15492360
申请日：2017-04-20
发明人： Kazuya Koizumi , Kengo Nieda
IPC分类号： B41J2/045
CPC分类号： B41J2/04573 , B41J2/04553 , B41J2/0458 , B41J2/04581 , B41J2/04586 , B41J2/2135 , B41J2/2146 , B41J3/543 , B41J2025/008
摘要： In a printing apparatus, an indefinite area in which slits are not formed is configured in a portion of a linear encoder scale in a rotation direction, and an adjustment unit, adjusts the timing of discharge from a printhead with respect to a first printing area out of a plurality of printing areas on a rotating member, without using a detection result of a first encoder sensor, based on a detection result of a second encoder sensor, the first encoder sensor being provided at a position corresponding to the indefinite area during a discharge of printing material with respect to the first printing, and the second encoder sensor being provided at a position that does not correspond to the indefinite area during the discharge of the printing material with respect to the first printing area.
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