摘要:
The present invention relates to an ink jet printing apparatus which sufficiently heats a head even in a low-temperature environment, which enables a proper image to be printed by stably ejecting ink, and which can be inexpensively and simply constructed. According to the present invention, if the detected temperature of a printhead is lower than a first heating threshold temperature, a heating mode in which the printhead can be heated is set before a printing operation. Further, when the heating mode is set and the detected temperature of the printhead is lower than a second heating threshold temperature, a heating unit heats the printhead. Consequently, even in a low-temperature environment, the heating operation keeps ink in a desired condition suitable for printing.
摘要:
The present invention provides a method of printing a high quality color image with no color variations at high speed. For this purpose, this invention arranges in a main scan direction a plurality of print heads that eject different color inks, and reciprocally moves each of the print heads to perform a multipass printing in which a print operation is executed in both the forward and backward passes. During the multipass printing, the print duties of the print heads are set by mask patterns. Each of the mask patterns divides the print duty setting area for each nozzle group of each head into subdivided areas, sets the print duties of the subdivided areas to values different from each other and sets the print duties of the print heads to different values.
摘要:
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.
摘要:
The present invention reduces the granularity of the dots for the entire density range by optimally setting formation amounts of a low-density dot and of a high-density dot per unit area. For this purpose, the formation amounts of the low-density dot and of the high-density dot in accordance with the density level are determined in such a way that as the density level rises, the formation amount of the low-density dot is gradually increased up to a first peak amount (200%) and, after reaching the first peak, gradually decreased, and in a range of density levels higher than a predetermined density level at which the low-density dot is formed to a specified amount (200%), as the density level rises, the formation amount of the high-density dot is gradually increased up to a second peak amount (100%) smaller than the first peak amount.
摘要:
In a display apparatus (10), a lenticular lens (2) is detachable from or integrated with a frame (1). An insertion slot 3 for inserting an object to be displayed in the horizontal direction is formed between the frame (1) and lenticular lens (2). An arm (4) which is used to place the display apparatus to stand upright in a portrait or landscape position, and attachment grooves (5) that receive the arm (4) are formed on the back surface of the frame (1). The arm (4) and upper, lower, right, and left symmetrical attachment grooves (5) are formed to be able to place the display apparatus (10) in any of the upper, lower, right, and left directions when the object to be placed is set in a direction perpendicular to its insertion direction.
摘要:
An ink jet recording apparatus adjusts at least one of a preliminary discharge time representing a time until the subsequent preliminary discharge is performed and a compensated time determined on the basis of the time elapsed since the previous preliminary discharge, so that the preliminary discharge is performed at a predetermined preliminary discharge hole. Accordingly, the ink jet recording apparatus is capable of recording on different kinds of recording media in a manner suitable for each of them without using a complex control process, and of performing the preliminary discharge according to the size of the recording media. In addition, a reduction in the throughput is prevented by using the ink jet recording apparatus.
摘要:
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.
摘要:
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.
摘要:
There are provided a printing apparatus and printing method capable of collecting unwanted ink mist and achieving high-quality printing by fine ink droplets. According to the method, the charges of a printing medium are removed prior to printing, and an ink mist collecting unit having an electrode of a positive polarity is employed. Floating ink mist is collected such that ink mist generated from discharged ink droplets and negatively charged is moved toward the ink mist collecting unit by the electrostatic force.
摘要:
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.