Abstract: A monolithic ink-jet printhead includes a substrate having an ink chamber to be supplied with ink to be ejected on a front surface thereof, a manifold for supplying ink to the ink chamber on a rear surface thereof, and an ink channel in communication with the ink chamber and the manifold, a nozzle plate including a plurality of passivation layers stacked on the substrate and a heat dissipating layer overlying the passivation layers, the nozzle plate having a nozzle penetrating the nozzle plate, a heater formed between adjacent passivation layers and located above the ink chamber for heating the ink to be supplied within the ink chamber, and a conductor provided between adjacent passivation layers, the conductor being electrically connected to the heater for applying current across the heater, wherein the heat dissipating layer is made of a thermally conductive metal for dissipating heat from the heater.

Abstract: This present invention is embodied in a printing system with thermally efficient heat transfer capabilities for reducing dimpling of a nozzle member during fabrication of the printhead portion of an inkjet printer. The printing system of the present invention includes a printhead assembly and an ink supply for printing ink on print media. The printhead assembly includes a printhead body having a heat transfer device, ink channels and a nozzle member having plural nozzles coupled to respective ink channels. The nozzle member is secured to the printhead body with a suitable adhesive layer. The heat transfer device can be defined by a portion of or the entire printhead body for reducing thermal expansion of the printhead body during exposure to heat.

Abstract: A thermal inkjet actuator for use in an inkjet printer assembly includes heat conduction means arranged to realize a predetermined negative pressure profile to facilitate droplet formation. In a preferred embodiment the heat conduction means comprises a thin layer of very high thermally conductive material such as Aluminum located in the middle of a non-heat conductive passive bend layer. The overall cool-down speed of the actuator, and hence the speed with which the passive bend layer returns to its quiescent position can be controlled by controlling the proximity of the heat conductive layer to the actuator's heater during fabrication.

Abstract: A printhead cartridge for a multi-printhead ink jet printer includes an array of ink jet nozzles and a heat sink for controlling the temperature of the nozzles. The heat sink is made up of a copper block and thinner copper wing regions extending from the block parallel to the array of nozzles. A passageway for coolant water is formed in the block and extends into the wings as a thinner channel. The block and the wing regions are mounted in thermal contact with the array of ink jet nozzles. The heat sink has the advantage that it allows the cartridges in the printer to be stitched together to cover the full width of a substrate.

Abstract: A print element including a heat sink, a printed wiring member mounted on the heat sink, a thermal ink jet assembly mounted to the heat sink, and a manifold assembly mounted to the heat sink. The manifold assembly has a first mount for removably connecting a first source of ink to the manifold assembly and a first outlet to the thermal ink jet assembly. The print element can be combined with a housing to form a print head in a first type of printing device or can be used without the housing in a second different printing device.

Abstract: A printhead for use in an ink jet printing device includes a nozzle plate which defines a plurality of droplet-emitting nozzles and a printhead housing bonded to the nozzle plate. A heater substrate is attached and oriented substantially perpendicular to the nozzle plate. An intermediate layer, along with a channel cap plate are attached to the heater substrate and define a plurality of ink channels in fluid communication with the nozzles. The printhead housing includes an internal wall, which defines an ink flow path around the heater substrate such that heat is transferred progressively and conductively to the flowing ink, thereby removing heat from the heater substrate and cooling the entire printhead. The printhead housing includes an air bubble accumulation chamber adjacent the top portion of the printhead housing to capture air bubble emitted due to the heating of the ink.

Abstract: Apparatus and methods are disclosed for enabling vapor handling in printing. In certain implementations, for example, one or more volatiles emitted during an ink-based printing process may be condensed into one or more liquids. The one or more liquids may be directed into absorbent materials such that the combined liquids and absorbent materials form a substance that qualifies as a solid, as determined by a given solid definition or regulatory standard. In certain (alternative but non-exhaustive) implementations, the volatiles emitted during printing may include water and oil, with the oil vapor being condensed into a liquid and added to the absorbent materials while the water vapor is being forwarded under the force of, e.g., negative air pressure.

Abstract: A thermal inkjet actuator for use in an inkjet printer assembly includes heat conduction means arranged to realize a predetermined negative pressure profile to facilitate droplet formation. In a preferred embodiment the heat conduction means comprises a thin layer of very high thermally conductive material such as Aluminium located in the middle of a non-heat conductive passive bend layer. The overall cool-down speed of the actuator, and hence the speed with which the passive bend layer returns to its quiescent position can be controlled by controlling the proximity of the heat conductive layer to the actuator's heater during fabrication.

Abstract: A liquid discharge head records by generating thermal energy to discharge ink from a discharge port onto a recording medium. The head is provided with a heat dissipating substrate positioned substantially parallel and adjacent to a discharge portion substrate, and a space, which communicates with the outside air, positioned at a surface of the heat dissipating substrate which is opposite the surface of the heat dissipating substrate facing the discharge portion substrate. The space extends in the scanning direction so as to facilitate air flow through the head during carriage movement in order to dissipate heat generated by the head during recording. A cooling fan may be provided to increase the air flow and the consequent heat dissipation.

Abstract: An ink jet recording head having improved printing performance and improved manufacturing efficiency, a manufacturing method of the ink jet recording head, and an ink jet recording device. A head chip in which nozzles for jetting ink droplets are formed is fitted in an opening of an ink manifold via rubber sealing members, and the chip is exposed to the interior of ink supply chambers. Thus, the chip is efficiently cooled by the ink, and the temperature of the ink can be controlled so as to be within a predetermined range. Accordingly, no heat sink is necessary, and as a result, the head is easily manufactured and made compact. Since the chip is fitted in the manifold opening via the sealing members, application of an adhesive and curing time are unnecessary. Thus, manufacturing efficiency is improved.

Abstract: A thermal ink jet printer having enhanced heat removal capability and method of assembling the printer. The thermal inkjet printer includes a thermal inkjet print bead adapted to hold an ink body therein. A heating element is adapted to be in fluid communication with the ink body for generating heat to heat the ink body. A vapor bubble forms in the ink body to eject an ink drop when the heating element causes the ink body to reach a predetermined temperature. Presence of the vapor bubble forces on ink drop out the printer to form an image on a recording medium. A conductive heat removal structure is in thermal communication with the heating element and is also in fluid communication with the ink body. Heat generated by the heating element is transferred from the heating element and into the heat removal structure. The heat removal structure then surrenders the heat to the ink body, which functions as an “infinite” heat sink.

Abstract: A method of controlling a temperature of a print chip of a printhead in an ink jet printer includes providing a memory device within the printer. Ink is emitted from the printhead. Temperature data associated with the print chip during the emitting step is recorded. A thermal resistance value associated with the printhead and/or a thermal capacitance value associated with the printhead is calculated. The calculating is dependent upon the recorded temperature data. The thermal resistance value associated with the printhead and/or the thermal capacitance value associated with the printhead is stored in the memory device. A temperature of the print chip at a future point in time is estimated based upon a number of ink drops to be emitted by the printhead before the future point in time, and the thermal resistance value associated with the printhead and/or the thermal capacitance value associated with the printhead.

Abstract: Droplet deposition apparatus comprises a base and a printhead adjustably mounted on the base and positionable relative to a datum on the base such that a swath of print produced by the printhead is in a predetermined position relative to the datum, the base being locatable on a printer using the datum. This can enable the printer to be easily replaced without any loss of alignment of the produced print swath relative to the carriage or body of the printer.

Abstract: An inkjet recording apparatus and method are disclosed. The apparatus includes a print recording source, which ejects wet ink onto a print media, and container, which ejects a supercooled gas onto the media in order to freeze-dry the wet ink. The methods include ejecting wet ink onto recording medium and freeze drying the ink on the medium. Also the supercooled gas is pass across a portion of the media either before or after wet ink received on the medium.

Abstract: An inkjet printer has an ink containing portion for containing ink, a driving portion having a nozzle for ejecting ink contained in the ink containing portion, and a first control circuit for driving and controlling the driving portion. An ink passage is disposed between the ink containing portion and the driving portion for supplying ink contained in the ink containing portion to the driving portion via an ink supply path extending from the ink containing portion through the ink passage to the driving portion. A connecting portion connects the ink passage to the printing unit. A heating portion is disposed in the ink supply path for heating the ink supplied to the driving portion. A cooling portion for cooling the ink is disposed in the ink supply path at a position closer to the driving portion than the heating portion.

Abstract: A thermal ink jet printer having enhanced heat removal capability and method of assembling the printer. The thermal inkjet printer includes a thermal inkjet print head adapted to hold an ink body therein. The heating element is adapted to be in fluid communication with the ink body for generating heat to heat the ink body. A vapor bubble forms in the ink body to eject an ink drop when the heating element causes the ink body to reach a predetermined temperature. Presence of the vapor bubble forces an ink drop out the printer to form an image on a recording medium. A conductive heat removal structure is in thermal communication with the heating element and is also in fluid communication with the ink body. Heat generated by the heating element is transferred from the heating element and into the heat removal structure. The heat removal structure then surrenders the heat to the ink body, which functions as an “infinite” heat sink.

Abstract: A method of operating an inkjet printer comprises forming an image on a media sheet by ejecting ink from an orifice array of an inkjet printhead at a print zone, capturing moist atmosphere from said printed image at a moisture removal zone and conducting moist atmosphere to said orifice array. An inkjet printing mechanism is provided including means for removing moisture from a printed sheet of media and means for conducting moisture removed from said printed sheet to an inkjet orifice array at a print zone.

Abstract: An ink-jet printer capable of reducing temperature rise of an ink-jet head to the utmost. The printer comprises a long ink-jet head in which a plurality of ink-discharge nozzles are arrayed in a lengthwise direction and a plate auxiliary member attached to the ink-jet head along the lengthwise direction. The auxiliary member has a predetermined volume to increase the thermal capacity of the ink-jet head, and has a plurality of warp correction portions provided at positions corresponding to different positions in the lengthwise direction of the ink-jet head, to provide a function to correct warp of the ink-jet head.

Abstract: This invention relates to a method and apparatus for acoustic ink printing using a bilayer configuration. More particularly, the invention concerns an acoustically actuated droplet emitter which is provided with a continuous, high velocity, laminar flow of cooling liquid in addition to a stagnant pool of liquid to be emitted as droplets.

Abstract: An ink jet recording head having improved printing performance and improved manufacturing efficiency, a manufacturing method of the ink jet recording head, and an ink jet recording device. A head chip in which nozzles for jetting ink droplets are formed is fitted in an opening of an ink manifold via rubber sealing members, and the chip is exposed to the interior of ink supply chambers. Thus, the chip is efficiently cooled by the ink, and the temperature of the ink can be controlled so as to be within a predetermined range. Accordingly, no heat sink is necessary, and as a result, the head is easily manufactured and made compact. Since the chip is fitted in the manifold opening via the sealing members, application of an adhesive and curing time are unnecessary. Thus, manufacturing efficiency is improved.

Abstract: This invention relates to a system and method for intelligently placing in a periodic and/or random manner a plurality of whetting areas which facilitate lubricating and/or cooling a doctor blade in a printing press when the cylinder is placed therein. The system and method includes one or more routines which analyzes engraving/etching data and any associated white-span length. One or more whetting areas are placed in a periodic or random pattern in response thereto. The whetting areas facilitate lubricating and/or cooling the doctor blade so that it does not heat beyond a predetermined level, thereby avoiding scoring of the cylinder and problems associated with deterioration of print quality or length of cylinder life resulting from thermo-dynamic expansion and/or undesired evaporation of ink associated with areas which make up the image.

Abstract: In a control method for an ink jet recording apparatus with which an amount of head generated by the head is restricted when a condition of a head temperature being not lower than a predetermined threshold is found includes the steps of detecting the head temperature and an environment temperature around the head, and restricting an extent of the amount of head generated by the head depending on the environment temperature or a difference between the head temperature and the environment temperature.

Abstract: An ink jet recording head including a flow path unit having pressure generating chambers, a piezoelectric vibrator for pressurizing the pressure generating chambers, a semiconductor integrated circuit for supplying a drive signal to the piezoelectric vibrator, and a member for absorbing the heat produced by the integrated circuit.

Abstract: An air vane directs air to cool the printhead of thermal inkjet printers having one or more movable carriages. A passive air vane is mounted on or molded to some portion of the carriage, printhead, ink tank or ink tank holder so that it moves with the movable carriage. Moving the air vane significantly increases the flow of air over the printhead, increasing the flow of heat away from the printhead and, consequently, improving the performance of the printer.

Abstract: A heat sink, provides a heat transfer pathway to remove heat from the rear face of a printhead substrate. The heat sink is located between the printhead substrate and the printer carriage. The heat sink may, in one embodiment, be biased to float substantially normal to the rear face of a printhead substrate using a biasing device, such as one or more springs, or a one or more spring clips. The springs, which are compressed, tend to urge the face of the heat sink against the back face of the printhead, forming an interface between the two faces. Additional force can be provided by a carriage arm, as its radius acts as a moment arm to assist in pressing the two faces together. A low thermal heat conductivity contact resistance and an improved thermal resistance to heat dissipation between the printhead substrate and the heat sink are provided by the high pressure interface resulting from the use of the springs and the radius of the carriage arm.

Abstract: A heat sink, provides a heat transfer pathway to remove heat from the rear face of a printhead substrate. The heat sink is located between the printhead substrate and the printer carriage. The heat sink may, in one embodiment, be biased to float substantially normal to the rear face of a printhead substrate using a biasing device, such as one or more springs, or a one or more spring clips. The springs, which are compressed, tend to urge the face of the heat sink against the back face of the printhead, forming an interface between the two faces. Additional force can be provided by a carriage arm, as its radius acts as a moment arm to assist in pressing the two faces together. A low thermal heat conductivity contact resistance and an improved thermal resistance to heat dissipation between the printhead substrate and the heat sink are provided by the high pressure interface resulting from the use of the springs and the radius of the carriage arm.

Abstract: A method and device are provided in an acoustic ink printhead for masking temperature-induced artifacts by shifting the artifacts to a high spatial frequency beyond the visual acuity of humans. A cooling device is provided in the printhead for reducing the temperature of ink in a high speed acoustic ink printhead that ejects ink drops from an array of ink drop ejectors as the printhead moves along a longitudinal path. The cooling device includes first and second heat sinks formed on the printhead to develop first and second temperature gradients in the ink held within the printhead. The first and second temperature gradients are oppositely oriented along the face of the printhead so that the first and second sets of ink drops ejected onto a paper sheet adjacent the printhead produce rows of printed spots having a substantially uniform average spot size in a direction transverse the longitudinal path of the moving printhead.

Abstract: An ink jet recording head including a base plate substrate formed by a first base plate substrate and a second base plate substrate in which the thermal expansion coefficient of the first base plate substrate directly in contact with a substrate having discharge energy generating elements arranged thereon is smaller than that of the second base plate substrate and the first base plate substrate is formed by material having the thermal expansion coefficient closer to that of the substrate having the discharge energy generating elements arranged therefor, and at the same time, the first base plate substrate, above which the discharge energy generating elements are placed, is supported by a surface of the second base plate substrate and a side face in the longitudinal direction of the second base plate substrate.

Abstract: An inkjet printer has a printing unit that ejects ink onto a recording medium. A temperature sensor detects the temperature of the ink upstream of the printing unit and outputs a temperature detection signal. Based on the value of the temperature detection signal, a CPU controls energization of either a heating unit or a cooling unit to heat or cool the ink so as to maintain the ink viscosity within a given range to thereby obtain stable printing quality.

Abstract: An ink jet recording apparatus for performing recording using a recording head for ejecting an ink from a plurality of ejection orifices, includes a print control unit for performing a print operation while switching a print mode between a thin multi-pass print mode for sequentially recording divided recording data in a plurality of number of times of relative scan operations of the recording head with respect to a single recording area, and a 1-pass print mode for recording all recording data in a single relative scan operation of the recording head, and an eject quantity control unit for controlling the eject quantity of the ink ejected from the recording head so that a total ink quantity on the recording area in the thin multi-pass print mode is larger than a total ink quantity in the 1-pass print mode.

Abstract: Disclosed is an inkjet printhead having a substrate that includes plurality of ink ejection elements formed thereon. The printhead also includes a heat exchanger in thermal contact with the substrate. The heat exchanger has a plurality of pathways for allowing a passage of ink through the heat exchanger.

Abstract: A method of printing with an ink jet printer uses inks of the same hue but of different saturation. The method utilizes a single dither array to control the printing application of the ink, preferably a full strength ink and a dilute ink to achieve gray scale printing. The dither array has threshold values defined for a subset of values of the range of pixel values of an image area, preferably 50% thereof, corresponding generally to threshold values between 0 and 127 inclusive. Pixel values are determined to be either within or outside of the threshold array range. Consequently, an ink dot is either printed or not, utilizing either the dilute or full strength ink. When the pixel value is within the threshold array range, the pixel value is then compared to the threshold value of the overlaid cell of the dither array. Where the pixel value is greater than the corresponding threshold value, an ink dot is printed utilizing dilute ink, else no dot is printed.

Abstract: A printhead comprises a source of ink, a body, a mounting base, and an ink heater thermally coupled to the mounting base. A flowpath delivers ink from the ink source to the heater and is defined at least in part by the mounting base on the body. Three or more thermally conductive paths extend from the mounting base to the body. Preferably, one or more of the thermally conductive paths are heat conductive bridges extending from the mounting base to the body through an edge feed via.

Abstract: An ink transfer printer has an electrically-insulated base plate. An array of electric heater elements, aligned with each other, is provided on a surface of the base plate, the heater elements being selectively and electrically energized in accordance with a series of digital image-pixel signals. A frame member, having an opening, is securely provided on the base plate such that the array of elements is encompassed by the opening of the frame member. A sheet of film covers the frame member such that the opening of the frame member is defined as an ink space fillable with ink, and the film sheet has a plurality of fine pores arranged along the array, with at least one of the plurality of fine pores being allocated to each of the heater elements. A heat dissipating conductor is formed of a thermal conductive material, and is associated with the film sheet such that thermal energy, locally generated by an electrical energization of at least one of the electric heater elements, is promptly dissipated.

Abstract: An inkjet printing device comprises a platen on which a printing zone is defined, a carriage, onto which at least a printhead is mounted, slidable along the printing zone near the platen, a service station, located in a service zone separated from the printing zone, a housing protecting and enclosing the printing zone and the servicing zone, and a device, for example a fan, for producing an air flow within the housing. A substantially constant air path is defined within the housing of the device through which the air flow is allowed to pass during its operation. A method for reducing ink aerosol in such a device, during its operation, comprises the following steps: producing an air flow within the housing, and forcing the air flow to pass through a substantially constant air path defined within the housing.

Abstract: A hot-melt type ink jet printer includes a nozzle head for ejecting a hot-melt type ink onto a sheet. The printer has a sheet feed passage defined by, in order from an upstream side in a sheet feeding direction, a sheet supply roller, a preheat platen, a sheet feed roller, a main platen, a cooling platen, discharge roller and a sheet discharge opening. The preheat platen and main platen have preheater and main heater, respectively, and these platen and the cooling platen are supported on a frame. A first suction port is formed between the main platen and the cooling platen and a second suction port is formed between the cooling platen and the frame. A power board and a cooling fan is provided within the frame for cooling the power board. By rotation of the cooling fan, air is introduced from the sheet discharge opening into the frame through the first and second suction ports to also cool the cooling platen and the heating platen.

Abstract: An ink jet print cartridge is provided for use in an ink jet printer. The cartridge comprises a printhead including a heater chip. The printhead is adapted to generate ink droplets in response to the heater chip receiving energy pulses from a printer energy supply circuit. A peltier effect cooling cell is associated with the heater chip for cooling the heater chip. The cooling cell receives current from the printer energy supply circuit as a function of energy flow to the heater chip.

Abstract: An ink jet printing apparatus having liquid passages arranged for causing liquid to flow while coming in contact with ink jet heads includes a liquid accumulating section for accumulating liquid therein, a pump for feeding the liquid, a first connecting passage for connecting the liquid accumulating section to inlet portions of the liquid passages, a second connecting passage for connecting outlet portions of the liquid passages to the suction side of the pump, and a third connecting passage for connecting the liquid accumulating section to the pump discharge side. With such construction, cooling liquid W of which temperature is controlled in the liquid accumulating section is fed to the liquid passages with negative pressure.

Abstract: An image recording apparatus and method includes a plurality of printheads and a plurality of heat exchangers. Each of the heat exchangers is thermally coupled with a respective one of the printheads. A preferred heat exchanger is a heat pipe wherein a cooling medium is circulated through each heat pipe. A flexible thermal link connects each of the heat exchangers with another of the heat exchangers to facilitate flexibility in mounting of the heat exchangers relative to each other.

Abstract: The present invention is related to an ink jet head comprising a substrate having a support, an intermediate layer provided on said support and a lower layer provided on said intermediate layer, and a heat energy generating member which generates heat energy to be utilized for discharging ink provided on said substrate. The ink jet head is characterized in that ink channels communicated to discharge openings for discharging ink are formed corresponding to the heat generating portions of said heat energy generating member on said heat generating substrate, and the thermal conductivity of said intermediate layer is selected higher than that of said support and higher than that of said lower layer.

Abstract: The invention described in the specification relates to a carrier for an ink jet printhead having unique characteristics which substantially inhibit corrosion and provide improved thermal heat transfer from energizer devices for the ink to the surrounding atmosphere. The carrier has top and bottom surfaces and is adapted to receive a chip and a circuit layer thereon. Another feature of the carrier is a well having a base and walls surrounding the base for receiving a semiconductor chip therein. The walls extend above the top surface of the carrier to a wall height that is substantially equal to the thickness of the circuit layer. The well has a well depth that is substantially equal to the thickness of the chip. A slot formed in the base of the well extends from the bottom surface of the carrier to the base and provide a flow path for ink to the energizers on the chip. Use of a separate carrier for the printhead components provides increased process versatility during the manufacture of the printhead.

Abstract: A printing apparatus has a printing head which is subjected to environmental temperature variation and generates a large amount of heat. Stable ejection of a printing liquid can be constantly performed by temperature control of the printing head. The printing apparatus having the printing head therein includes a fluid passage provided in contact with the head, a fluid supply device for supplying a fluid to the fluid passage, and a heater for controlling temperature of the supplied fluid to maintain the temperature of the fluid within a predetermined range. The printing head is provided with a water tube for cooling water, which water tube gradually varies its cross sectional area. By this, flow velocity of the cooling water is gradually increased on the upstream side and maintained to have a large constant flow velocity on the downstream side.

Abstract: A printhead for ejecting fluid has a nozzle on a first surface and a fluid feed channel defined within a second surface. The printhead includes an aggregate of thin-film layers, a portion of which is exposed by the fluid feed channel. The aggregate of thin-film layers contains at least one energy dissipation element suspended over the fluid feed channel. A heat spreader is mesially interposed within the aggregate of thin-film layers. The heat spreader proximally abuts to the energy dissipation element and extends from the energy dissipation element to extend past the fluid feed channel definition. The heat spreader is capable of dissipating heat from the energy dissipation element to a portion of the first surface of the printhead.

Abstract: In the ink jet printer using hot melt ink, a heater is provided for overheating hot melt ink in the ink supply channel. The collector is provided for collecting air bubbles generated when the hot melt ink is overheated by the heater. The air bubbles, collected in the collector, are then expelled from the release valve. The hot melt ink is subsequently cooled before the ink enters the print head section, where the air is dissolved in the ink. The above-described air bubble-releasing and -dissolving processes are repeatedly performed as the ink is circulated due to the maintained difference in ink level between the ink supply chamber and the ink collecting chamber.

Abstract: A heater chip of a thermal ink jet printer has its entire surface, which is opposite the parallel surface having resistors for heating ink supplied from a cartridge body to nozzles in a nozzle plate, supported by and engaged with a surface of a base of a high thermally conductive radiator. The radiator, which is submerged in the ink in the cartridge body, has fins, which preferably have a surface area greater than the surface area of the base, extending upwardly from the base of the radiator. The cartridge body has surfaces, which are exposed to the ambient, with a surface area preferably greater than the surface area of the fins. Heat is transferred from the heater chip to the radiator base and from the fins of the radiator to the ink. The ink transfers heat to the ambient through the cartridge body.

Abstract: An ink jet printing apparatus for industrial use, which is provided with a comparatively large number of nozzles arranged for high duty recording, particularly an ink jet textile printing apparatus, and an ink jet printing apparatus suitably used for printing on a large-sized medium, are provided together with a method for controlling the temperature of the printing head of such high duty printing apparatuses, and various other types of printing apparatuses reliably. To the large number of heaters used for recording in a printing step, driving signals are applied to cause them to discharge ink for recording and, to the discharge heaters that are not to perform recording, secondary driving signals that do not allow ink to discharge are applied. These secondary driving signals cause the heaters not used in recording to generate heat, so as to reduce unevenness in the intensities of heat generation among the many discharge heaters of the printing head.

Abstract: Image processing equipment(100) has a thermally activated write head element (200) that builds up heat during operations and an improved heat exchanger assemblage (300) having a high surface area heat sink (312) that absorbs and then dissipates the heat. Heat exchanger (300), structurally connected to the write head element (200), includes an air moving means (304) having a backward curved impeller (306) driven by a compact planar de motor for producing higher impeller speeds with superior thermal transfer performance.

Abstract: An ink jet recording apparatus for recording on a recording medium using an ink jet recording head that records by discharging ink from ink discharge ports thereof. The ink jet recording apparatus includes a carriage that carries the ink jet recording head and reciprocally moves the head in a manner such that the recording head is opposite the recording medium, and the carriage includes a temperature stabilization portion contactable with the ink jet recording head carried on the carriage, wherein the temperature stabilization portion radiates heat generated by the ink jet recording head.

Abstract: The present invention is a thermal printhead which includes a substrate portion, a resistive material configured to form a heating element and a thermal barrier island positioned between the resistive material and the substrate portion. The thermal barrier island is defined between the heating element and the substrate portion to reduce the heat flow between the heating element and the substrate portion.

Abstract: An ink jet printhead is disclosed which has improved printhead cooling thereby improving operating efficiency. The printhead is constructed so that the manifold bringing ink from an ink reservoir into an ink inlet to the printer directly contacts the thermally conductive surface of the substrate in which the heater elements are formed- The cooler ink removes some of the accumulated heat from the heater substrate and is subsequently ejected. In one embodiment the printhead comprises an upper channel substrate which is bonded to a lower heater substrate which is formed with a ledge which extends past the rear face of the channel substrate. The channel substrate has an ink inlet formed into its rear face and adjacent to an extended portion of the heater silicon surface. An ink reservoir brings ink to the printhead via an ink manifold which is sealed against the exposed silicon surface and against the side of the ink inlet.