38 results about "Ejection rate" patented technology

A method for setting up a condition for a drive signal in a liquid ejection head that includes a plurality of linearly-arranged nozzles and driving elements provided for each of the nozzles, includes: calculating an average value or a median value of ejection rates for each nozzle relating to a supply of the drive signal under a plurality of conditions; classifying the plurality of nozzles into a plurality of groups based on the average value or the median value of the ejection rates; calculating a proper condition for the drive signal corresponding to each group based on a statistical value of the ejection rate relating to the group; and selecting one proper condition among proper conditions corresponding to the groups so as to set the selected proper condition for each nozzle.

A method for setting up a condition for a drive signal in a liquid ejection head that includes a plurality of linearly-arranged nozzles and driving elements provided for each of the nozzles, includes: calculating an ejection rate for each nozzle relating to a supply of the drive signal under a predetermined condition by using a moving average; classifying the plurality of nozzles into a plurality of groups based on the ejection rate calculated by using the moving average of each nozzle; calculating a proper condition for the drive signal corresponding to each group based on a statistical value of the ejection rate relating to the group; and selecting one proper condition among proper conditions corresponding to the groups so as to set the selected proper condition for each nozzle.

From a cost and productivity perspective, the recording and color-measurement of a test pattern to determine whether it is necessary to execute calibration places a heavy burden on a user. The present invention determines the need for processing to generate a color correction parameter without recording a test pattern. More specifically, the present invention determines whether it is necessary to execute color correction parameter generation processing based on an increase in a dot count since color correction parameter generation processing was previously executed, or a change in a ejection rate.

The image recording apparatus records an image by ejecting ink onto a recording medium from a print head having a plurality of nozzles while moving the print head and the recording medium relatively to each other. The image recording apparatus comprises: a memory device which stores reference density characteristics obtained by measuring a prescribed test pattern formed on the recording medium by means of the nozzles; a density characteristic acquiring device which acquires density characteristics of print areas corresponding to the nozzles; a compensation device which compensates a droplet ejection rate signal of each of the nozzles so that the density characteristics acquired by the density characteristic acquiring device coincide with the reference density characteristics; and a quantization device which quantizes each droplet ejection rate signal compensated by the compensation device.

An image forming apparatus has: an ejection head which ejects droplets of liquid toward a recording medium in accordance with image data; a hold device which holds the recording medium; a conveyance device which conveys the recording medium relatively to the ejection head while the recording medium is held by the hold device; a heating device which is provided with the hold device and is capable of heating a part of the recording medium selectively; and a control device which controls the heating device in accordance with the image data so that, before the droplets of the liquid are ejected by the ejection head, the recording medium is heated by the heating device in accordance with a heating pattern in which a first temperature not greater than an allowable temperature of the recording medium is set for a first region of the recording medium where a liquid ejection rate is not less than a first threshold value while a second temperature less than the first temperature is set for a second region of the recording medium where the liquid ejection rate is not greater than a second threshold value not greater than the first threshold value.

A drive unit for changing the driving rate of paper ejection rollers for ejecting sheets of paper after fixing is installed, and an image forming apparatus has an option, and when ejecting the sheets of paper to an intra-body paper ejection unit, after the sheets of paper pass a fixing device, the paper ejection rate of paper ejection rollers 24 is increased, and the ejection force of the sheets of paper P is increased, and paper jamming at the time of paper ejection to the intra-body paper ejection unit is prevented.

The invention relates to an ultra-low carbon IF steel complex deoxidation method. The method includes the following steps that (1) after RH vacuum decarburization and degassing treatment are completed, the complex deoxidizer Si-Ca-Ba-Fe is added for preliminary deoxidation according to the weight percentage content requirement of silicon in finished product IF steel; and (2) after the Si-Ca-Ba-Fe is added, RH clean circulation lasts for 3-5min, the molten steel oxygen content is measured, and then aluminum particles are added for final deoxidation according to the molten steel oxygen content based on a conventional deoxidation technology. Compared with the prior art, the ultra-low carbon IF steel complex deoxidation method has the beneficial effects that (1) Al2O3 impurities in molten steel can be reduced, and floating elimination of the Al2O3 impurities is facilitated; (2) the composite deoxidation product mainly refers to a composite occluded foreign substance of BaO, CaO, Al2O3 and the like, the occluded foreign substance can float easily, the size is small, water gaps cannot be blocked, and smooth pouring is guaranteed; (3) the cleanliness of the molten steel is improved obviously, the quality of automobile body sheets and other products with high surface quality requirements is effectively improved, the included ejection rate is lowered, and the whole performance of IF steel is improved; and (4) operation is simple and easy to implement, and cost is low.

A liquid ejecting apparatus includes a liquid ejecting head that ejects liquid from a nozzle. A head movement section moves the liquid ejecting head in a movement direction. A controller controls a movement ejection operation that ejects the liquid from the nozzle while moving the liquid ejecting head in the movement direction. If there is satisfied a decision condition that indicates that the ejection rate is excessive, the controller causes the number movement ejection operations related to a certain range to be larger than if the decision condition were not satisfied. With respect to second liquid being higher in viscosity than first liquid, the controller determines the number movement ejection operations related to the above-mentioned certain range by the above-mentioned decision condition determined as excess of the above-mentioned ejection rate at an ejection rate being smaller than that of the first liquid.

A method for increasing the efficiency of additive drag reduction by establishing a drag-reducing viscoelastic coating on a surface. The method includes mixing a polymer into a concentrated solution that has approximately the same density as a fluid flowing over the surface, ejecting the mixture / solution into the flowing fluid in a manner such that a coating of polymer, which initially grows thicker with time, is adsorbed onto the surface, and reducing the ejection rate of the first fluid such that the coating of polymer then grows thinner with time. These steps may be repeated so that a desired minimum coating thickness is maintained over an extended period of time. The method reduces the polymer expenditure rate for a given drag reduction. Moreover, the produced viscoelastic coating impedes the attachment and growth of drag-producing natural organisms and may be applied without “down-time” (e.g., while underway).

The dither mask generation method includes: a nozzle ejection rate determination process of determining a nozzle ejection rate of each nozzle in a recording head; a corresponding nozzle specifying process of specifying the nozzle corresponding to individual pixels of a dither mask by making at least one nozzle in charge of recording at each pixel position correspond to the individual pixels of the dither mask; a nozzle ejection rate reflecting processing process of performing processing of reflecting the nozzle ejection rate on an evaluation index when individual thresholds of the dither mask are set; and a threshold setting process of setting the thresholds to the individual pixels of the dither mask on the basis of the evaluation index.

A liquid ejection control device, which makes an ejection object medium and an ejection nozzle column which ejects liquid relatively scan in a primary scan direction which almost perpendicularly intersects the nozzle ejection column and makes the ejection object medium and the ejection nozzle column relatively scan in a subordinate scan direction which almost perpendicularly intersects the primary scan direction. The liquid ejection control device includes an ejection control unit controlling ejections of ejection nozzles such that ejection rates of the ejection nozzles vary according to positions of the ejection nozzles in the subordinate scan direction, the variation being set such that the ejection nozzles having a maximum ejection rate are dispersed in the subordinate scan direction, when a rate of an ejection, which is charged by a predetermined ejection nozzle, to a primary scan line at the same position in the subordinate scan direction is called an ejection rate.

The dither mask generation method includes: a process of setting a nozzle relative ejection rate which is a control target of the nozzle ejection rate and stipulates a relative using ratio of the individual nozzles; a process of setting a nozzle pattern indicating correspondence relation between individual pixels of the dither mask and the nozzles in charge of recording at respective pixel positions; a process of setting an upper limit to the nozzle ejection rates of the individual nozzles for each raster in a main scanning direction, regarding at least some thresholds; and a process of setting the thresholds to the pixels of the dither mask based on the nozzle relative ejection rate, the nozzle pattern and a limitation by the upper limit.

The device has a pressure regulating device (6) i.e. poppet valve, provided such that fuel pressure is achieved within a high pressure line (3b). A fuel pump control unit (7) computes necessary fuel ejection rate while computing discharge flow rate that is added to necessary engine fuel rate. The engine fuel rate is computed based on engine operating condition that is detected by an air flow measuring device (8) and a crank angle sensor (9) to control engine rotating speed of a fuel pump (4) i.e. piston pump, for ejaculating the computed fuel ejection rate.