Abstract: An integrated varactor and piezoelectric device for an acoustic ink jet ejector includes a substrate having a first surface, the silicon substrate forming a first electrode, an epitaxial layer formed over the first surface of the silicon substrate, a silicon dioxide layer formed over the epitaxial layer, a second electrode formed over the silicon dioxide, a piezoelectric layer formed over the second electrode, a third electrode formed over the piezoelectric layer and an acoustic lens formed over a second surface of the silicon substrate. The acoustic lens is aligned with the center of the piezoelectric layer generally along an axis perpendicular to the first and second surfaces of the silicon substrate.

Abstract: Both a cavity plate and a vibrating plate are made of polyether imide resin, and a polysulfone resin film having a thickness of 3 .mu.m is formed on one or both of the joining faces of the plates. The melt temperature of polysulfone resin is about 190.degree. C., and the heat deformation temperature of polyether imide resin is about 200.degree. C. When the cavity plate and the vibrating plate are contacted with each other through the polysulfone resin films and then heated at 190.degree. C. for one hour, therefore, the polysulfone resin films are fused to become a fused layer so that the plates are firmly joined. Since the heat deformation temperature of the cavity plate is 200.degree. C. which is higher by 10.degree. C. than the melt temperature (190.degree. C.) of the polysulfone resin films, the fusion does not cause ink flow paths of nozzles, etc. to be heat-deformed.

Abstract: An ink retainer is comprised of a flexible polyurethane foam which is prepared by reacting a polyether polyol with a polyisocyanate. The polyol includes at least 20% by weight based on the total weight of the polyol of a polymeric polyol having styrene and/or acrylonitrile grafted thereto. The foam contains at least 20 cells/inch. The foam is inserted in a container at a compression ratio by volume of 1/2 to 1/10 when the cell number is 20 to 50 cells/inch and 1/1 to 1/5 when the cell number is more than 50 cells/inch. The foam is resistant against attack from ink and ensures stable constant supply of ink.

Abstract: In a digital copying apparatus, the digital image data of a document to be copied are stored in a memory means, and an image is copied on a paper according to the digital image data stored in the memory means. Two clear modes are provided for clearing the image data stored in the memory means. In the first clear mode, the data in the memory means is cleared when the document is detected to be removed from the platen and the like. In the second clear mode, the data in the memory means is cleared when a new document is detected to be set on the platen glass or the like. One of the two clear modes is selected with the operational panel and the selected mode is displayed. A memory clear command is sent to the memory means at an appropriate timing in the two clear modes, and the memory clear is executed by the memory means. The memory clear command is sent only after the copying operation is completed or it is inhibited to clear the image data when a latent image is being formed according to the image data.

Abstract: In the printer head of this invention, the base component 1 and the lid component 5 can be easily bonded without clogging the groove 2 that serves as the ink flow channel. The eutectic alloy layer 3 is formed by a eutectic reaction on the bonding surface between the base component 1 having the groove 2 composed of silicon formed thereon and the lid component 5 having the thin gold film 4 formed thereon. Therefore, the base component/and the lid component 5 are bonded to each other.

Abstract: Disclosed herein is a method of forming color images with color inks including a cyan ink on a recording material provided with an ink-receiving layer, which contains basic magnesium carbonate and has a dry coat weight of from 1 to 15 g/m.sup.2, wherein at least one of the cyan ink and one or more another inks to form mixed-color areas with the cyan ink contains a surface active agent, wherein a cyan dye contained in the cyan ink is represented by the general formula ##STR1## wherein M means an alkali metal atom, an ammonium ion or an organic amine residue, m stands for a number of from 1 to 4, and is a number of from 0 to 3.

Abstract: A deflection electrode for use in a continuous ink jet printing device molded of powdered ultra high molecular weight polyethylene combined with carbon black and subjected to oxygen plasma treatment.

Abstract: A color video printer having a printer head portion and a cartridge detachable for supplying a solid dye to the printer head portion. The head portion vaporizes the solid dye and transfers the vaporized dye to a substrate. The cartridge is attached to the printer head portion when the supply of the dye is necessary. When the dye is supplied from the cartridge, the solid dye in the cartridge is liquefied and the liquefied dye is supplied to the printer head portion by capillarity.

Abstract: A waste-ink absorbent to be mounted on an ink-jet recording apparatus comprises a composition containing a biodegradable polymer and a microorganism growth nutrient. An ink contains a recording agent and a liquid medium for dissolving or dispersing the recording agent, the recording agent comprising a composition containing a biodegradable polymer linked to a solubilizing group of a water-soluble dye by coordination bonding. An ink-jet recording method conducts recording by ejecting droplets of the ink through an ejection orifice of a recording head in correspondence with recording signals. An ink-jet recording apparatus is equipped with a recording unit having an ink container holding the ink therein and a head.

Abstract: A substrate comprising a supporting member and a treated article provided on the supporting member comprising: 1) a patterned resistor layer; 2) a patterned material provided on the patterned resistor layer comprising at least aluminum; 3) a silicon compound film provided on both the patterned resistor layer and the patterned material; and 4) a multi-layered wiring provided on the article comprising as constituents at least a conductive layer comprising at least aluminum and electrically connected to the patterned material. The substrate includes substrates for integrated circuits, circuit boards, and ink jet recording heads.A method for etching a silicon compound film comprises etching the silicon compound film in a gas flow rate ratio of CHF.sub.3 to C.sub.2 F.sub.6 of 1 to 6 under an etching pressure of 40 to 120 Pa.

Abstract: The level of ink present in an ink-supply cartridge of an ink-jet type printer is detected by a sensor that moves with the reciprocating pen carriage of the printer. A flag is connected to the collapsible supply cartridge so that the flag position changes relative to the path of the carriage movement as ink is depleted from the cartridge. The sensor detects the presence of the flag and the position change of the flag is precisely measured by the carriage motion control system. An indicition of the cartridge level derived from the flag position is provided.

Abstract: A large array or pagewidth printhead fabricated from printhead elements or subunits having adhesive-free butting edges. Each of the printhead elements includes a heater element and a channel element bonded together by an adhesive such as an epoxy. A space or adhesive-receiving aperture is formed between the channel element and the heater element before mating so that any adhesive forced from between the channel element and heater element by the pressure of mating does not flow onto the butting surfaces, but instead overflows into the space thereby maintaining an adhesive free butting edge. The channel element includes an etch trough which forms the space. The printhead elements are butted together to form a large array printhead. The absence of adhesive on the butting edges improves manufacturability of the large array printhead.

Abstract: An ink-jet recording method for forming an image on a recording medium by ejecting ink droplets through an orifice of a recording head in response to a recording signals comprises ejecting an ink having a surface tension ranging from 25 to 35 dyn/cm onto a recording medium constituted of a base sheet and a coating layer formed on the base sheet to form an image, the coating layer being selected from (a), (b), and (c) below:(a) a coating layer mainly composed of polyvinyl alcohol of a saponification degree of from 75 to 98 mol % and a polymerization degree of from 100 to 500, or a derivative thereof.(b) a coating layer mainly composed of a copolymer of vinylpyrrolidone with a vinyl monomer having a hydrophobic group, and a polyalkylene oxide or a derivative thereof, and(c) a coating layer mainly composed of an aromatic polyvinylacetal resin, and a polyalkylene oxide or a derivative thereof.

Abstract: A method for registering printer dots in a printer having separate cartridges or print bars which create dots on paper moving therebeneath. Commands are generated to drive a paper carrier past the cartridges. Machine readable targets on the paper carrier are scanned and a processor uses signals generated by the targets for measuring the distance traveled by the carrier between detection of the first and second marks. The difference between the measured distance and the distance which yields ideal registration is used to delay (or advance) dot firing to improve registration. In another aspect, targets comprising slots oriented transverse to paper movement and at a 45.degree. angle relative to paper movement are photolithographically engraved in nozzle plates. The slots are scanned to produce information about misregistration along an axis in the direction of paper movement and along an axis transverse thereto.

Abstract: An ink jet printing method is provided which method comprises the steps of:(1) image-wise protecting by means of an ink jet a liquid, called ink, in the form of droplets onto a receiving material containing at least one reagent A that with at least one reagent B contained in the ink droplets is capable of forming by color reaction a colored product, and(2) optionally uniformly heating said receiving material and/or uniformly exposing it to chemically active electromagnetic radiation during and/or after the deposition of said ink on said receiving material to start or enhance said color reaction, characterized in that from separate ink jets ink of different concentrations of said at least one reagent B or inks containing separately reagents A or B in different concentration is (are) deposited image-wise onto said receiving material containing said at least one reagent A.

Abstract: In droplet ejecting nozzles, a material having a small contact angle with ink is covered over the inner surface of the droplet ejecting nozzles of the nozzle plate. The nozzle plate is made of a material having a contact angle with ink that is larger than the contact angle of the material covering the inner surface of the nozzles. This provides the droplet ejecting nozzles with a stable ink droplet ejecting property.

Abstract: The present invention provides a removable orifice plate securing structure for use in conjunction with a conventional ink jet printer printhead assembly. The orifice plate securing structure comprises an orifice plate mounting member having a rear end portion disposed in an opposing relationship with the front end surface of the printhead body portion, a front side surface and an opening extending outwardly from the rear end portion to the front side surface. The orifice plate mounting member is configured to removable secure the orifice plate between the front side surface of the orifice plate mounting member and the front end surface of the printhead body portion in an operative alignment position with the ink receiving chambers. The opening is configured to allow ink from the ink discharge orifices to operatively pass outwardly from the orifice plate mounting member.

Abstract: A recording medium having at least a pigment and a binder on the surface of a base, wherein the binder is comprised of at least water-soluble polyester. An ink jet recording method includes the step of performing recording on a recording medium by discharging ink from an orifice of an ink jet recording head in accordance with recording signals, wherein the recording medium has at least a pigment and a binder on the surface of a base, and wherein the binder is comprised of at least water-soluble polyester. The amount of the water-soluble polyester is 40% or more with respect to the total weight of the binder.

Abstract: The invention is an apparatus and method for periodically applying a hydrophobic coating layer to a face of an ink jet printing head to prevent droplets of ink from clogging nozzles of the printing head. An ink jet printer embodying the invention includes a hydrophobic material applicator that moves relative to the printing head to deposit hydrophobic material on the face of the ink jet printing head. The applicator may be a wiper blade or cylinder made from a hydrophobic material or embedded with a hydrophobic material, wherein the applicator contacts the face of the printing head during relative movement to transfer hydrophobic material to the printing head. The applicator may also be a spray head that sprays hydrophobic material onto the face of the printing head during relative movement.

Abstract: An ink jet head comprises an discharging element having discharging ports to discharge ink, ink passages conductively connected to the foregoing discharging ports, and exothermic elements giving thermal energy to ink distributed in the ink passages, and at least a part of such an element is covered with a silicone resin, the amount of low molecular siloxane content of which is 500 ppm or less. Thus, in a thermal jet recording head, the low molecular siloxane divergence is lowered in its process of hardening or after hardening to enable the reduction of the occurrence frequency of the abnormal ink foaming, contributing to the improvement of the reliability of the thermal jet recording head as well as to the improvement of the yield in its fabrication.