Abstract: A method of manufacturing a printing head which can prevent ink, diluent, and a mixed solution thereof from adhering to and spreading about a portion of the print head around the nozzle is disclosed. The method comprises forming a hydrophobic film on a surface of a nozzle member, forming a first nozzle into which a discharge medium is introduced, and a second nozzle into which a metering medium is introduced, in the nozzle member. The first nozzle has a first orifice on the surface, and the second nozzle has a second orifice also on the surface. The first and second orifices are located so as to ooze the metering medium from the second orifice to the first orifice through the surface. An additional step of removing the hydrophobic film from a portion of the surface between the first and second orifices to define a groove is included.

Abstract: A printing apparatus having a printing head that prevents ink, diluent, and a mixed solution thereof from adhering to and spreading about a portion of the printing head around a nozzle. The printing apparatus has an enhanced ability to reproduce a gradation of concentration, thereby making it possible to form a recorded image of high resolution. The printing head has a first nozzle, which discharges a discharge medium, and a second nozzle, which discharges a metering medium. The orifices of the first and second nozzles are adjacent to each other in a nozzle outlet face of the printing head. A groove, a hydrophilic portion, or an insular projection is formed between the first and second nozzles to control the spread of ink, diluent, and a mixed solution thereof around the nozzles. The hydrophilic portion may be made by a non-processed portion of the outlet face of the printing head, and a portion other than the nonprocessed portion may be made a hydrophobic portion.

Abstract: A printer apparatus having a print head which has a first pressure chamber into which a discharge medium is introduced, a second pressure chamber into which a feed medium is introduced, and at least one set of nozzles comprised of a first nozzle communicated with the first pressure chamber and a second nozzle communicated with the second pressure chamber arranged adjacent to each other and which mixes and discharges the discharge medium and the feed medium from the nozzles, wherein a liquid repellent treatment is applied to at least one of the portion between the mutually adjoining first nozzle and second nozzle and a portion between the sets of nozzles adjoining each other on a nozzle opening face of the print head; wherein a projecting portion is formed on at least one of the portion between the mutually adjoining first nozzle and second nozzle and the portion between the sets of nozzles adjoining each other on the nozzle opening face of the print head; or wherein a recessed portion is formed between the mu

Abstract: In a driving method including a print head, it is possible to form surely dot of accurate concentration and to execute certain mixing and discharge actuation.

Abstract: In a liquid jet recording apparatus, a stable ink ejection/recording operation is realized, and a natural image with improved multi-gradation is recorded. In the liquid jet recording apparatus for mixing a dilution liquid with ink quantified by utilizing displacement of a piezoelectric device in response to print data, and for ejecting a mixture fluid made by mixing the ink with the dilution fluid so as to perform a recording operation, when the ink is quantified, a rising speed of a signal applied to the piezoelectric device is selected to be lower than, or equal to 1V/microsecond.

Abstract: An image drawing apparatus wherein the scanning speed is reduced without decreasing the image drawing speed for forming an image to achieve reduction of the noise and assure a long life. The image drawing apparatus for drawing an image in accordance with image data comprises a laser light source for generating a plurality of laser beams, a galvano mirror for deflecting the plurality of beams of light generated from the laser light source, and a rotary drum on which a predetermined image is to be drawn by the plurality of beams of light deflected by the galvano mirror.

Abstract: An electrostatic blackboard having an image display function for displaying on an electrostatically recordable blackboard display a visible toner image converted from an electrostatic latent image formed on the backboard by an electrostatic recording head includes copying apparatus for transfering the visible image on the blackboard to a large-size paper sheet. A semi-permanent latent image toner fusing operation is provided to create a semi-permanent visible image, yet permit easy erasing.

Abstract: A flexible electrostatic recording medium used in conjunction with an electronic blackboard includes a base layer composed of a synthetic resin, a conductive layer formed on the base layer, and a dielectric layer formed on the conductive layer by a thin transparent film, preferably of polyvinylidene fluoride, and adhered to the conductive layer by means of an adhesive.