Abstract: There is disclosed an ink jet printhead which comprises a plurality of nozzles 3 and one or more heater elements 10 in a bubble forming chamber 7 corresponding to each nozzle 3. Each heater element 10 is configured to heat a bubble forming liquid 11 in the printhead to a temperature above its boiling point to form a gas bubble 12 therein. The generation of the bubble 12 causes the ejection of a drop 16 of an ejectable liquid (such as ink) through an ejection aperture 5 in each nozzle 3, to effect printing. The transient rise in pressure within the bubble forming chamber when the bubble forms is less than 20 MPa. Keeping the transient pressures relatively low, the strength requirements of the printhead structures are reduced. Accordingly the dimensions of the components can reduced for more compact design and easier manufacture.

Abstract: An inkjet head driving circuit driving piezoelectric actuators 21 for ink ejection provided on an inkjet head H includes one D/A converter 62 that converts a digital signal into an analog voltage and outputs the analog voltage, and a waveform generating portion 64 into which an output voltage of the D/A converter 62 is input, and which generates a voltage rising waveform when the output voltage of the D/A converter 62 is larger than a predetermined potential that is midway between a maximum value and a minimum value of that output voltage, and generates a voltage rising waveform when the output voltage of the D/A converter 62 is smaller than the predetermined potential.

Abstract: A dryer assembly for drying a liquid ink image formed on a substrate comprising a housing defining a portion of a sheet moving path; a plenum positioned within the housing, the plenum including air flow and outlet means contiguous to the plenum permitting forced air to exit the plenum, the outlet being in the form of a plurality of moving openings adapted to direct flowing air through the openings to the liquid image, the openings moving relative to the image; and a substrate transport device for moving the substrate carrying the liquid ink image on a front side thereof through the housing and under the plurality of moving openings. The dryer assembly has particular use in an ink jet printing system.

Abstract: A liquid composition for ink-jet recording, or an ink set for ink-jet recording which produces an image having water resistance and excellent print quality, and which can reduce color bleeding that occurs in formation of color images, and furthermore, which can extend a life-span of ink-jet recording heads, as well as an ink-jet recording method, a recording unit, an ink cartridge and an ink-jet recording apparatus are provided. The liquid composition or a color ink constituting the ink set comprising a polyvalent metal salt, a material selected from the group consisting of acids including amino groups and salts thereof, and a liquid medium is used.

Abstract: A device verification method includes the steps of providing a device including a memory and a print pattern generator communicatively coupled to the memory, the print pattern generator generating image data based at least in part on a first value actually stored in a first memory location in the memory; printing the image data to produce a printed verification pattern; scanning the printed verification pattern to generate a verification value; reading a memorized value purportedly stored in the first memory location of the memory; comparing the memorized value with the verification value; and evaluating the device based on a result of the comparing step.

Abstract: A water base ink set for ink-jet recording comprises a first ink which contains an anionic dye, and a second ink which contains a cationic dye. At least one of the first and second inks contains at least two glycols selected from the group consisting of diethylene glycol, triethylene glycol, and polyethylene glycol, polyvinyl pyrrolidone, and water. The ink set makes it possible to stably discharge the ink by means of an ink-jet head, and it realizes vivid recording which is highly reliable and highly accurate and which provides good color balance.

Abstract: There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. The printhead includes a structure which is less than 10 microns thick, on which the nozzles are incorporated.

Abstract: A problem of the present invention is to provide an ink set and an ink jet recording method, according to which a high-quality printed article can be provided for which deformation such as wrinkling does not occur, the color density is high, and there is little blotting or unevenness even if regular paper is used as the recording medium.

Abstract: A liquid container which supplies ink to its exterior until the ink is almost depleted and allows simple detection of the remaining ink amount, is constructed to distribute components of the ink even after a prolonged standing. The liquid container is provided with a connecting portion for connection to an ink deriving tube and an air introduction tube of an ink jet printer. Both the ink deriving tube and the air introduction tube are positioned for connection to the connecting portion at a position deviated from a center of the bottom of the liquid container. The deviation facilitates mixing of ink components as ink is supplied from the container.

Abstract: The invention described in the specification relates to an improved ink jet printer cartridge structure which includes a substrate carrier or nose piece upon which semiconductor devices for ink jet printheads are mounted. The substrate carrier has a top surface containing one or more substrate locator wells each well having well walls, a well base and at least one ink feed slot in each well base and side walls attached to the top surface along the perimeter thereof. One or more of the side walls contain fins for heat removal from the substrate carrier and at least two alignment devices attached adjacent at least one of the side walls for precisely aligning the substrate carrier in a printer carriage.

Abstract: There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. Each heater element is formed of solid material, more than 90% of which, by atomic proportion, is constituted by at least one element, from the periodic table of elements, having an atomic number below 50.

Abstract: A multi-channel droplet deposition apparatus including a body (103) having a plurality of channels (104a) terminating in a common channel termination surface (104) and a nozzle plate (102) having nozzles (102a) for selectively ejecting liquid drops originating from the channels, wherein the nozzle plate is releasably attached to the body by an adhesive layer.

Abstract: The described embodiments relate to a slotted substrate for use in a fluid ejecting device. One exemplary embodiment includes a substrate having a thickness between generally opposing first and second surfaces. A slot received in the substrate. The slot has a central region joined with at least one terminal region. The central region extends between the first and second surfaces. The at least one terminal region includes, at least in part, a bowl-shaped portion that has a diameter at the first surface greater than a width of the central region at the first surface.

Abstract: A fluid controlling apparatus having a multi-layer structure that includes a top layer having a yield strength of less than about 500 megapascals, a middle layer having a yield strength of greater than about 1000 megapascals, and a bottom layer having a yield strength of less than about 500 megapascals.

Abstract: A method for manufacturing a fluid injection head. The fluid injection head structure is formed on a substrate and has a manifold therein, bubble generators, a conductive trace, and at least two rows of chambers adjacent to the manifold in flow communication with the manifold. The conductive trace disposed on a top surface of the substrate and partially disposed between the two rows of the chambers above the manifold is used to drive the bubble generator.

Abstract: In one embodiment, the present invention recites a fluid ejection device comprising a first drop ejector associated with a firing chamber. The first drop ejector is configured to cause fluid having a first drop weight to be ejected from the firing chamber, wherein the first drop ejector includes a first heating element and first drive circuitry electrically coupled with the first heating element. The present embodiment further comprises a first bore disposed within an orifice layer disposed proximate the first drop ejector and associated with the first drop ejector. The present embodiment also comprises a second drop ejector associated with the firing chamber. The second drop ejector is configured to cause fluid having a second drop weight to be ejected from the firing chamber, wherein the second drop ejector includes a second heating element and second drive circuitry electrically coupled with the second heating element.

Abstract: A drive unit is used for independently driving at least two different sections of a print head unit and includes a memory, a print timing judge unit, a comparator, and a print operation delay unit. The memory stores timing maps that indicate rising edges of drive waveforms used to drive the print head unit. The print timing judge unit judges when a particualr one of the sections of the print head unit is to be driven to perform a print operation. If the print timing judge unit judges that the particualr section is to be driven, the comparator searches the timing maps in the memory to find rising edges that overlap between waveforms to be applied to particualr section and other sections of the print head unit. When the comparator finds rising edges that overlap, the print operation delay unit delays drive of the one section until the comparator no longer finds rising edges that overlap while the comparator delays the timing map that corresponds to the particluar section of the print head.

Abstract: An inkjet printhead heater chip has a silicon substrate with a heater stack formed of a plurality of thin film layers thereon for ejecting an ink drop during use. The thin film layers include: a thermal barrier layer on the silicon substrate; a resistor layer on the thermal barrier layer; a doped diamond-like carbon layer on the resistor layer; and a cavitation layer on the doped diamond-like carbon layer. The doped diamond-like carbon layer preferably includes silicon but may also include nitrogen, titanium, tantalum, combinations thereof or other. When it includes silicon, a preferred silicon concentration ranges from 20 to 25 atomic percent. A preferred cavitation layer includes an undoped diamond-like carbon, tantalum or titanium layer. The doped diamond-like carbon layer ranges in thickness from 500 to 3000 angstroms. The cavitation layer ranges from 500 to 6000 angstroms. Inkjet printheads and printers are also disclosed.

Abstract: A structure having a base plate, such as silicon, provided with a through hole makes it possible to curtail the process numbers at the time of manufacture, while enhancing the reliability thereof. When the through hole is provided by anisotropic etching from the backside of the base plate, a silicon nitride film, which becomes membrane on the surface side of the base plate is formed so as not to allow etching solution from leaking to the surface side of the base plate. It is preferable to form the silicon nitride film using plasma CVD method to make the inner stress of the silicon nitride film a compression stress of 3×108 Pa or less.

Abstract: The invention provides a liquid discharge head, a substrate for the head, a liquid discharge method, and a liquid discharge apparatus, in which a high gradation can be easily obtained and simplification of a circuit formation and miniaturization of a recording head can be achieved. According to the present invention, a liquid discharge head comprises a heat generating element for generating thermal energy which is used for discharging liquid from a discharge port, and a protective layer for protecting the heat generating element, provided on the heat generating element. In the discharge head, the protective layer has a first region with a substantially uniform and desired thickness and a second region with a substantially uniform thickness thinner than said desired thickness, the volume of liquid droplets discharged from the discharge port is changed by changing electric energy applied to the heat generating element.