Abstract: A printing apparatus having a stop unit 22 which, if the amount of ink emission in a first print head A is set to a value at or below a preset threshold value, such as 002 in terms of a picture printing data signal, and if the amount of ink emission in a second print head B is set to a value higher than the preset threshold value, a discharge of dilution liquid from the first print head A is stopped in keeping with the stop of the ink emission in the first print head A. The stop unit thereby suppresses the discharge of excess dilution liquid to inhibit generation of tone jump or pseudo contour, as well as to improve the picture printing speed and to enable high quality picture printing.

Abstract: A component for a printhead of an inkjet printer includes a flexible substrate and oxide island heat barriers. The oxide islands allow the flexible substrate to be bent without cracking the oxide islands, a problem which otherwise occurs when the heat barrier is a continuous oxide layer. Thin film resistors are supported on the oxide islands and front conductors are connected to back conductors by vias. The flexible substrate can be folded to form monolithic assemblies or the flexible substrate can be bent around a pen body. Discrete heat-spread layers of titanium are provided between the oxide islands and a chromium adhesion layer on the substrate.

Abstract: A recording apparatus capable of making the image formation without reduction in recording quality is embodied. The recording apparatus comprises holding means for detachably holding a recording head for forming image on the recording medium, and positioning means for positioning the recording head at a predetermined position of the holding means in mounting the recording head on said holding means, characterized in that the positioning means has a first fitting meand for restraining the recording head in a first direction, and a second fitting means for restraining the recording head in a second direction, wherein restraining means is provided for fitting the second fitting means prior to the first fitting means in mounting the recording head on the holding means.

Abstract: To assure that the space efficiency of a recording apparatus can be improved, the length of each of cables to be electrically connected to a mechanism section can be optimized, and the recording apparatus having excellent handling properties can be produced with small dimensions at a reduced cost, a controlling section for controlling a mechanism section substantially composed of an automatic feeding section, a conveying section, a discharging section and a recording section, each of which is associated with a recording operation to be performed by the recording apparatus, is arranged above the mechanism section.

Abstract: An ink jet printing apparatus enables a printing operation to be performed for both surfaces of a printing medium with the use of an ink jet head for ejecting ink. The apparatus comprises components for designating either a both surface printing mode or a one surface printing mode, for applying processing liquid to the printing medium, for reducing a quantity of ejection of ink to the printing medium, and for designating either the component for applying processing liquid or that for reducing ejection quantity in the case that the both surface printing mode is designated.

Abstract: The concentration of carbon monoxide in a gaseous medium is reduced by selective catalytic oxidation in the presence of gaseous oxygen by passing the gaseous medium through a catalyst capable of oxidizing carbon monoxide in an exothermic reaction at temperatures within a given temperature range and by controlling the temperatures encountered in the catalyst in such a manner that the exothermic reaction takes place first above a threshold temperature below which the catalyst would be rapidly inactivated at the relatively high carbon monoxide concentrations present in the gaseous medium as it enters the catalyst, and subsequently, after the carbon monoxide concentration has been reduced to an acceptable level, at less than the threshold temperature to further reduce the carbon monoxide concentration to a desired minimum level below that achievable at temperatures above the threshold temperature.

Abstract: An ink jet recording apparatus comprises a recording head adapted for ejecting at least two colors of ink, a discriminater for discriminating between character data and bit map data, and a controller for selecting a character data recording mode or a bit map data recording mode in accordance with a discrimination result by the discriminater. The controller controls an amount of ink ejection in the bit map data recording mode to be less than that in the character data recording mode.

Abstract: An ink jet recording apparatus comprises an ink tank containing ink; a recording head for performing recording by selectively ejecting ink; a mounting portion for mounting the ink tank and the recording head; a liquid passage coupling portion provided on either or both of the ink tank and the recording head for separating or connecting the ink passages in the ink tank and the recording head; a holding portion provided on either or both of the ink tank and recording head for guiding the ink tank to the recording head in order to hold them separably; and an electrically or mechanically connecting portion provided on either or both of the recording head and mounting portion for electrically or mechanically connecting the recording head to or separating it from the mounting portion.

Abstract: An ink set having (i) a black ink having a surface tension of not less than 40 dyne/cm, the black ink including a first dye; and (ii) at least one color ink having a surface tension of not more than 40 dyne/cm, the at least one color ink including a second dye which is rendered insoluble by the first dye when the black ink and the at least one color ink are mixed.

Abstract: An ink and solvent supply consists of a dual-chambered container. The lower chamber is provided with make-up solvent, while the upper chamber is provided with ink concentrate. When solvent is required, it is removed directly from the lower chamber. When fresh ink is required, vacuum is applied to the upper chamber causing solvent to pass from the lower chamber to the upper chamber via a conduit, to dilute the ink concentrate to form fresh ink which is then provided to the printing system.

Abstract: A magnetoresistive element uses a multilayer film where ferromagnetic layers and nonferromagnetic layers are layered on each other, wherein a permanent magnet layer is formed on the aforementioned multilayer film through one of the nonferromagnetic layers and a bias field is applied on the multilayer film.

Abstract: In an ink-jet printing apparatus, upon turning on the power source of the printing apparatus, a stirring operation of ink in the main tank is performed for a given period of time, and during sequent printing operation, the stirring operation in the main tank is performed for the give period at every predetermined elapsed time. By this, the printing operation for a long period can be performed employing ink having a water insoluble dye without causing a problem of admixing of bubble or so forth caused by stirring of the ink in the main tank.

Abstract: An ink jet recording method in which a water-based ink containing a recording agent is attached to a recording surface of a recording medium by an ink jet system, and liquid water is applied to the recording medium at a suitable time proximate to the time of applying the ink. A period of time is set during which a state in which the water-based ink is in a liquid form in the recording surface coexists with a state in which liquid water other than water contained in the water-based ink exists in a portion of the recording medium other than the recording surface.

Abstract: Media are disclosed having a substrate, water-absorbing layer, and adhesive ink-receiving layer. After being printed with an aqueous pigmented ink, the ink-receiving layer may be laminated to a permanent substrate. Exposure to an energy source may render the printed image more durable.

Abstract: A substrate; a silicon dioxide film formed on the substrate; a platinum lower electrode formed on the silicon dioxide film; a piezoelectric film formed on the platinum lower electrode; and an upper electrode formed on the piezoelectric film, wherein the relationship between a film thickness (X) of the platinum lower electrode and a film thickness (Y) of the silicon dioxide film satisfies conditions of0.5.ltoreq.X/Y.ltoreq.4, and3,000 .ANG..ltoreq.X.ltoreq.2 .mu.m.

Abstract: Disclosed is a printing process which comprises (a) incorporating into an ink jet printing apparatus containing an aqueous ink a recording sheet which comprises (1) a substrate; (2) a first coating layer which comprises a binder and microspheres; (3) a second, ink-receiving coating layer situated so that the first coating layer is between the second, ink-receiving coating layer and the substrate, said second, ink-receiving layer comprising a hydrophilic binder and microspheres; (4) an optional antistatic agent; (5) an optional biocide; and (6) an optional filler; and (b) causing droplets of the ink to be ejected in an imagewise pattern onto a surface of the recording sheet containing microspheres, thereby generating images on the recording sheet.

Abstract: An information transmitting mechanism is described for transmitting information of an ink tank of an ink jet recording apparatus to a controller thereof. The recording apparatus performs recording by scanning a carriage on which a recording head and the ink tank are mounted; the ink tank is removably mounted to said recording head. The information transmitting mechanism includes the ink tank and the recording head; in particular, the ink tank has an information mark. The recording head is connected to the ink tank and has a signal terminal making a signal connection with the ink tank and with the controller of the apparatus. The content of the information mark is transmitted to the controller through the signal terminal. The information relating to the ink tank is transmitted to the controller through the head terminal and through the carriage terminal. The information relating to the recording head is transmitted to the controller through the carriage terminal.

Abstract: Provided is an ink jet fluid composition which comprises a liquid carrier medium and a diketene. Upon ink jet printing on a printing medium and subsequent exposure to an energy source, a durable and water-insoluble layer is formed. Such an ink jet fluid composition and printing process can be advantageously used to produce durable and water-insoluble images on printing media.

Abstract: An ink container, such as that used in an ink jet recording apparatus, is improved to effectively suppress permeation of ambient air into ink compartments through the container walls and to permit easy refilling with ink. The ink container includes a container body which has a plurality of liquid compartments defined therein by a plurality of partition plates to accommodate the ink, and inter-compartment communicating portions through which adjacent ink compartments communicate with each other, so that successive liquid compartments are emptied one after another as the liquid is progressively consumed. The container body also has a buffer compartment which covers at least the top walls of said liquid compartments. The ink container may have a discrete segments of a porous member which are disposed only in the inter-compartment communicating portions.

Abstract: A Zn or part-Zn plated steel sheet has an MgO coating free of metallic Mg thereon which increases corrosion resistance and plating adherence. The MgO coating is formed by coating according to the sol-gel method or by dipping or treating by cathodic electrolysis a Zn or part-Zn plated steel sheet in a molten salt bath mainly containing a magnesium salt.