摘要:
In an electrostatic inkjet device having a plurality of ejection electrodes, when an ejection electrode is designated as an ejection dot, a potential of the ejection electrode is changed to an ejection level for a first time period. When the ejection electrode is not designated as an ejection dot, the potential of the ejection electrode is changed within a predetermined level different from a ground level such that ejection does not occur at the ejection electrode.
摘要:
An electrostatic ink jet recording head has a laminate structure for an electrode assembly disposed in an ink chamber of a head body. The laminate structure includes a first base film, a plurality of patterned recording electrodes, a plurality of patterned control electrodes and a second base film. The recording electrodes and control electrodes are alternately arranged one by one as viewed perpendicular to the laminate. The tips of the recording electrodes are located ahead of the tips of the control electrodes toward the opposite electrode. In operation, the control electrodes located on both sides of a specified recording electrode are applied with a high voltage pulse to eject liquid ink from the meniscus in the vicinity of the specified recording electrode. The ink jet recording head can be manufactured at low costs and with a higher density.
摘要:
An inkjet recording apparatus includes an insulating support member having a major surface on which a plurality of ejection electrodes are formed with each of the ejection electrodes protruding from an ejection end of the insulating support member. Each of the ejection electrodes is coated with an insulating material. Further, a cover member is provided to cover the insulating support member to form ink chambers between them and an opening at an ejection end of the cover member. The ejection portion of each ejection electrode protrudes from the ejection end of the cover member through the opening. The ink is supplied from one ink chamber to the ejection electrodes and flows into the other ink chamber through the ejection electrodes.
摘要:
A recording head includes an ink chamber storing ink containing electrified toner particles and having an ejection opening 7 at one end and an ejection electrodes for ejecting the toner particles from the ejection opening. A counter electrode 6 faces the ejection opening. The recording head also includes a toner, concentration detection sensor detects a potential of the ejection opening 7, and a control unit for deciding a detected toner concentration and controlling a voltage to be applied to the ejection electrodes. The surface potential nearby ejection opening or the toner concentration and a voltage applying time are made to previously correspond to each other and are stored in a ROM table. A stable printing quality is obtained by detecting the toner concentration near the ejection opening by the toner concentration detection circuit and controlling a voltage to be applied to the ejection electrodes corresponding to a detected value.
摘要:
An electrostatic ink jet printing head comprises printing electrodes formed on the base film of a substrate. The printing electrodes have insulating coating films which coat the printing electrodes, respectively. Each of the printing electrodes has a main electrode portion formed on the base film and a protruding electrode portion which protrudes from the base film. A covering member covers the main electrode portion. The covering member has an internal surface defining, in cooperation with the main electrode portions and the base film, a ink receiving space which receives ink containing toner particles.
摘要:
A record head for an electrostatic ink jet recorder includes a head chip implemented as a laminate of alternating flat conductors and flat insulators and etched by an etching liquid reactive only to the material of the insulators. The conductors readily turn out ridges protruding from the head chip and having a high aspect ratio. The ridges each serve as an ejection electrode.
摘要:
A head body is shaped to project toward an ink ejection side, and formed along the projection with an ink channel for circulating the ink, at the vertex of the front end of which an opening is formed for ejecting the ink from the ink channel. An ejection electrode is formed along the front end of the head body. Its front end reaches the opening. An electrophoresis electrode is secured in the ink channel at a position opposite to the opening, and supplied with a voltage for moving the toner particles in the ink flowing in the ink channel to the front end of the ejection electrode with the electrophoresis effect. An opposite electrode is positioned opposite to the ink ejection side. A drive circuit drives the opposite electrode when the electrophoresis electrode is driven, and generates voltage for attracting the toner particles toward the opposite electrode with Coulomb force that is generated by an electric field acting between the ejection electrode and the electrophoresis electrode, and the opposite electrode.
摘要:
An inkjet recording apparatus includes K ejection electrodes and K gate electrodes corresponding to the K ejection electrodes, respectively, which are located at a distance from the K ejection electrodes. The K gate electrodes are divided into M blocks each having N gate electrodes electrically connected in common. A first voltage pulse is applied to a selected one of N groups each formed by electrically connecting an i.sup.th (1.ltoreq.i.ltoreq.N) ejection electrode for each block to each other and a second voltage pulse is applied to a selected one of the M blocks. A voltage difference is generated between a group and a block which are selected from the N groups and the M blocks depending on an input signal, wherein the voltage difference is equal to or greater than a minimum voltage difference which causes ejection of an ejection electrode.
摘要翻译:喷墨记录装置包括分别与位于距离K个喷射电极相距一定距离的K个喷射电极的K个喷射电极和K个栅极电极。 K栅电极被分成M个块,每个具有共同电连接的N个栅电极。 将第一电压脉冲施加到N组中的所选择的一个,每个组中的每一个通过将每个块的第i个(1 / i = N)个喷射电极彼此电连接而形成,并且将第二电压脉冲施加到所选择的一个 的M块。 在根据输入信号从N组和M块中选择的组和块之间产生电压差,其中电压差等于或大于引起喷射电极喷射的最小电压差。
摘要:
The electrostatic ink-jet recording head has a head member having a chamber for supplying and discharging ink, a head chip in which a plurality of continuous meniscus shapes are respectively formed on groove portions, a cover plate formed so as to expose a part of the corners of the groove and flange portions, and a protruded member on which pectinate protrusions are formed at the same intervals as those of the meniscus shapes formed on the head chip. A recording electrode is formed on each groove portion. Each protrusion of the protruded member is set on each groove portion of the head chip and moreover, formed so as to be protruded beyond the corner of the flange portion.
摘要:
An ink-jet printing apparatus, having (a) a plurality of ink-ejecting bars each having a pointed end, the pointed end being capable of moving toward a recording medium; (b) an ink reservoir for supplying to each of the ink-ejecting bars with ink including toner; (c) a counter electrode for drawing the toner in ink from a location faced to the pointed end of said ink-ejecting bar, said counter electrode and the ink ejecting bar interposing the recording member; and (d) recording electrodes for flying the toner in ink from the pointed end of each of the ink-ejecting bars.