Abstract: In an inkjet printing apparatus capable of automatic duplex printing, time required to fix ink is shortened and throughput is improved without producing uneven fixing. The inkjet printing apparatus includes a printing unit that prints onto a sheet, a fixing unit that heats a sheet printed by the printing unit, a conveying unit that conveys a sheet with respect to the printing unit and the fixing unit, and a controller that controls the conveying unit such that a printing region of a sheet printed on the first side by the printing unit passes through the fixing unit, and afterwards, the conveyance direction of the sheet is reversed in order to print on the second side and the printing region once again passes through the fixing unit. The controller variably controls the conveyance speed of the sheet when the printing region once again passes through the fixing unit.

Abstract: An object of the present invention is to provide a liquid applying apparatus which can inhibit a variation in application amount associated with the individual variability of a component of the apparatus. According to the present invention, a liquid holding space in which a liquid is held is formed between the applying member and the liquid holding member. When the applying member moves, the liquid attached to the applying member is fed out of the liquid holding space together with the applying member. The liquid is applied to a medium. The application amount of liquid applied to the applying medium varies depending on the individual variability of a component such as a liquid applying member. The variation in liquid application amount is adjusted by adjusting section for adjusting, the rotation speed of the liquid holding member or the flow speed of the liquid flowing through the liquid holding space.

Abstract: An ink jet printing apparatus comprises a distributing unit configured to distribute print data for printing dot into data used for printing by first printing elements provided in a print head and data used for printing by second printing elements provided in the same print head, and a determining unit configured to, for the data used for printing by the respective parts of the printing element arrays of each of first and second print heads which have the overlapped print regions, determine a ratio between amount of the data used for printing by a combination of the first and second printing element arrays in the first print head and a combination of the first and second printing element arrays in the second print head.

Abstract: A printing apparatus including a print head including nozzle groups each having nozzles, each of the nozzle groups applying ink having a plurality of volumes from the nozzles to form dots including dots differing in size, including: an arrangement determination unit to determine an arrangement of dots to be formed by each of the nozzle groups; a size determination unit to determine sizes of ink ejected to print the dots determined by the arrangement determination unit, according to respective ejection characteristics of the nozzle groups, such that a print characteristic of an image based on the dot arrangement determined by the arrangement determination unit is within a predetermined range; and an ejection control unit to control the print head to eject ink having the plurality of sizes determined by the size determination unit in positions of a print medium based on the arrangement determined by the arrangement determination unit.

Abstract: An image processing apparatus for generating dot data to form an image by forming dots on a recording medium includes a receiving unit, a first, second, and third generating unit, and a correcting unit. The receiving unit receives first and second image data included in image data. The first generating unit generates, per the first image data, first ink color data representing a multi-valued signal value corresponding to an ink color. The second generating unit generates, per the second image data, second ink color data representing a multi-valued signal value corresponding to an ink color. The correcting unit corrects the signal value represented by the generated first and second ink color data. The third generating unit generates, per the first and second ink color data of which the signal values have been corrected, the dot data representing existence of formation of dots to form an image.

Abstract: An apparatus includes a sheet feeding unit configured to feed sheets one by one from a storing unit, a coating unit configured to apply a coating liquid on a fed sheet, and a printing unit configured to perform printing on the coated sheet. The control unit controls timing to start a sheet feeding of a next page while a current page is being printed, depending on occurrence of event of temporary interruption or delay of printing operation.

Abstract: Adequate correction processing is performed on image data based on the degree of ink concentration that occurs even. An image processing apparatus having: acquisition unit for acquiring multi-value image data and a first parameter related to the degree of concentration of ink; first generation unit for generating corrected data by correcting the multi-value data that is to be printed for the first pixel based on the multi-value data that is to printed in the first pixel and a first parameter; and second generation unit for generating the first parameter and a second parameter that indicates the degree of ink concentration of the plurality of nozzles when printing a second pixel that is printed by the nozzles next to the first pixel.

Abstract: A printing device using a print head ejecting ink from a plurality of nozzles to print ink dots of a plurality of dot diameters, includes a print-characteristic acquisition unit obtaining print characteristic information on dot diameters of ink dots to be printed per each predetermined portion of the plurality of nozzles, a distribution ratio determination unit determining a distribution ratio for distributing image data to the predetermined portions of the plurality of nozzles based on the information, a dot print position determination unit quantizing the image data to determine a dot print position based on the image data and sizes and an array of thresholds; and a plurality of masks based on dot distribution order determined according to the distribution ratio, distributing printing of each of the ink dots of the plurality of dot diameters to the dot print position determined by the dot print position determination unit.

Abstract: Provided are an inkjet printing apparatus and inkjet printing method that can, regardless of an ejection frequency of a print head, stabilize density of an image expressed on a print medium. For this purpose, an ink concentration integrated value is obtained according to the ejection history of each nozzle so as to be increased by data indicating non-ejection of the nozzle or decreased by data indicating ejection. Then, image data on the target pixel is corrected such that density of the target pixel is further reduced as the pixel is subjected to printing by a nozzle having a higher ink concentration integrated value.

Abstract: A large and small dot distribution pattern is generated, for each chip, according to a large and small dot distribution ratio and ejection failure nozzle information. In doing so, a bias of large and small dot distribution ratio at a nozzle position including an ejection failure nozzle is set to be smaller than that at a nozzle position that does not including an ejection failure nozzle. Then, dot data to be printed by the ejection failure nozzle is equally distributed to large dot nozzles that can eject normally and small dot nozzles. By such a configuration, even if a plurality of printing chips have different printing characteristics, ejection failure compensation processing is performed to minimize image degradation caused by an unexpected ejection failure and an average ejection volume of each of the chips converge on a fixed target ejection volume, which leads to reduction of density unevenness among the chips.

Abstract: An ink jet printing apparatus comprises a distributing unit configured to distribute print data for printing dot into data used for printing by first printing elements provided in a print head and data used for printing by second printing elements provided in the same print head, and a determining unit configured to, for the data used for printing by the respective parts of the printing element arrays of each of first and second print heads which have the overlapped print regions, determine a ratio between amount of the data used for printing by a combination of the first and second printing element arrays in the first print head and a combination of the first and second printing element arrays in the second print head.

Abstract: This invention reduces an unprinted stripe occurred by edge deviation of a printhead. An inkjet printing apparatus according to this invention can execute a first printing mode in which an image is printed by scanning the printhead in a first region on the printing medium N times and scanning the printhead in a second region adjacent to the first region (N+1) times, and a second mode in which an image is printed by scanning the printhead in the first region M times and scanning the printhead in the second region (M+1) times. The width, in the conveyance direction of the printing medium, of the second region printed in the second printing mode is narrower than the width, in the conveyance direction of the printing medium, of the second region printed in the first printing mode.

Abstract: There is provided an ink jet recording apparatus capable of shortening the recording duration even when an image to be recorded includes a high-duty area having a large amount of ink to be discharged in the case of two-sided recording on a recording medium. The ink jet recording apparatus, which reverses the recording medium to enable two-sided recording, performs dividing the image to be recorded on a high-duty area having a large amount of ink to be discharged into two (first and second) planes, first plane recording involving a unit area to be subjected to an ink discharge amount below a predetermined amount, reversing the recording medium, and recording on the rear surface, and reversing the recording medium again, and second plane recording.

Abstract: To achieve high-quality printing by controlling an ink-travelling direction by an electrostatic force so that the ink can be accurately applied on a printing medium, the ink is landed on a desired position of the printing medium effectively without disturbing the ink ejection, independent of a difference in the thickness of the printing medium. An electric field between a printing head and the printing medium is generated by applying a voltage to a platen of conductive material positioned immediately below the printing medium. At this point, the voltage applied to the platen is adjusted so that the electric field of a preferable intensity can be generated on a face of the printing head where ejection openings are formed irrespective of the thickness of the printing medium.

Abstract: 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 insufficient in a case where liquid is applied to recording media. In an embodiment of the present invention, in a case where it is determined that the application liquid is sufficient in a storage tank, the application liquid is filled in a liquid retention space, the application liquid is applied to the recording medium, and thus recording is performed. In a case where it is determined that the liquid application is insufficient in the storage tank, recording with application is prohibited.

Abstract: The present invention provides a liquid application device, an inkjet recording apparatus and a recording apparatus, which are capable of performing an adequate application initial operation according to the length of waiting time and power-off time, as well as a method of controlling the liquid application device. In the present invention, information on an end time of the previous processing for collecting liquid is read from a nonvolatile memory, current time information indicating the current time is obtained, and information on a lapse of time from the end time of the previous collection to a start time of the current application. Thereafter, the number of preliminary rotations R of an application roller is decided based on the information on the lapse of time with reference to a look-up table. Sequentially, the application roller is rotated by the decided number of preliminary rotations R to perform preprocessing operation.

Abstract: When thinning processing is performed to reduce the occurrence of black stripe caused by an overlap between scanning areas that is designed to prevent an end deviation from causing a white stripe, dots printed in a predetermined region by not only an ejection opening array subjected to the thinning processing but also other ejection opening arrays are counted so as to obtain their respective printing duties. Then, a color gamut is obtained based on the printing duties of the respective ejection opening arrays. Then, a thinning rate of the ejection opening array subjected to thinning processing is obtained by referring to a table corresponding to the color gamut, based on the printing duties of the respective ejection opening arrays obtained as above, and the thinning processing is performed. Accordingly, thinning processing can be performed which accurately reflects an amount of actual end deviation.

Abstract: An object of this invention is to prevent prolongation of the time taken for a suction recovery operation while suppressing wasteful consumption of ink in the suction recovery operation. An ink-jet printing apparatus includes a plurality of caps which, when a plurality of nozzles of an ink-jet head are divided into a plurality of nozzle groups, are arranged one by one for the respective nozzle groups, and cap the respective nozzle groups, a suction pump which generates a negative pressure in the plurality of caps to suck ink from the plurality of nozzles, and is arranged commonly for the plurality of caps, and a control unit which controls the suction pump so as to make the negative pressure by the suction pump act on all the caps when a common negative pressure is generated in the plurality of caps, and make different negative pressures by the suction pump act sequentially on the plurality of caps when different negative pressures are generated in the respective caps.

Abstract: In an inkjet printing apparatus capable of automatic duplex printing, time required to fix ink is shortened and throughput is improved without producing uneven fixing. The inkjet printing apparatus includes a printing unit that prints onto a sheet, a fixing unit that heats a sheet printed by the printing unit, a conveying unit that conveys a sheet with respect to the printing unit and the fixing unit, and a controller that controls the conveying unit such that a printing region of a sheet printed on the first side by the printing unit passes through the fixing unit, and afterwards, the conveyance direction of the sheet is reversed in order to print on the second side and the printing region once again passes through the fixing unit. The controller variably controls the conveyance speed of the sheet when the printing region once again passes through the fixing unit.

Abstract: The invention provides a configuration capable of judging whether an ink jet head is exchanged or whether it is replaced, and changing an amount of recovery operation when the ink jet head is exchanged or replaced. Thus a recording apparatus capable of avoiding a defective ink supply in case the ink jet head is exchanged or replaced, and not wasting the ink by unnecessarily excessive recovery operation, can be provided.