Abstract: A liquid ejection head unit includes an ejection unit that ejects a liquid, a first wire configured to supply a fixed potential used for driving the ejection unit, a second wire configured to transmit a pulse signal that defines an ejection timing of the liquid in the ejection unit, a first counter whose count value changes based on a potential change in the first wire, a second counter whose count value changes based on a potential change in the second wire, and an ejection restriction unit that restricts an ejection operation of the liquid in the ejection unit according to a count value of the first counter and a count value of the second counter.

Abstract: A printer includes a recording unit that executes on a recording medium, a recording operation under a sublimation transfer scheme; a conveying unit that using a protrusion roller having protrusions protruding toward an outer periphery and abutting a first surface of the recording medium, conveys the recording medium to a recording position for the recording operation; a pseudo recorded image data producing unit that produces pseudo recorded image data that includes pseudo pixels obtained by correcting a density of each predetermined pixel that is determined corresponding to an arrangement pattern of the protrusions on the protrusion roller and is determined from among pixels to be recorded in a second area that excludes a first area that is in contact with the protrusions, on the first surface of the conveyed recording medium; and a recording control unit that controls the recording unit based on the pseudo recorded image data.

Abstract: In a method for controlling a print head with a number of printing elements operating according to the thermotransfer principle, an energy quantity is fed to a printing element in a feed step in order to transfer ink from an ink carrier device associated with the print head to a substrate associated with the ink carrier device to generate an image point of a barcode, with the energy quantity being adjusted dependent on the position of the image point in the barcode.

Abstract: In a thermal head control system for controlling heating energy to a thermal had perforating stencil material unrolled from a stencil material roll, the heating energy to a thermal head is controlled according to the surface condition of the stencil material. The residue of stencil material M in a stencil material roll is calculated by residue calculating means and the elapsed time of the stencil material roll from production thereof is obtained on the basis of date data on the date of production of the stencil roll. Further, kind data on the kind of stencil material stored in the storage portion is obtained and the heating energy is obtained on the basis of the residue, the elapsed time and the kind data. On the basis of this heating energy, the heating action of the thermal head is controlled.

Abstract: The present invention provides a printer in which a current is conducted to a thermal head 20 in order to pre-heat the thermal head 20 concurrently with battery checking prior to printing. Thereafter, power supplied from a battery is fed to the thermal head 20, which is a load, immediately before the color inks on an ink ribbon 7a are transferred. At the predetermined timing immediately succeeding the feeding of power (in 5 to 10 msec), a voltage developed from the battery 8 is detected. The detected voltage is corrected so that a printing density of inks transferred from the thermal head 20 will remain constant irrespective of whether the voltage developed from the battery 8 is high or low.

Abstract: A heat-sensitive stencil master making apparatus for making a stencil master by imagewise perforating thermoplastic film of heat-sensitive stencil master material according to an image on an original includes a thermal head which has an array of a plurality of heater elements and is brought into thermal contact with the thermoplastic film. Heater elements selected from the array of the heater elements according to the image on the original are applied with an electric voltage so that perforations are formed in the parts of the thermoplastic film of the heat-sensitive stencil master material in contact with the selected heater elements.

Abstract: The invention relates to a method for controlling the amount of energy from a printer head in a thermo-printer. The appropriate amount of energy for obtaining the best possible print quality with a certain printing material is controlled through calculating the amount of energy required as a function of the printing speed of the printer, over the full range of printer speed, and of the characteristic printing material data. The printing speed is continuously variable within the complete printing speed range of the printer. Characteristic data for the printing material are classified for magnitude and may be given as an offset relative to a reference material, or as absolute values.