Abstract: A liquid ejection device includes: a support member configured and arranged to support a conveyed medium conveyed in a predetermined direction; a liquid ejection head having an ejection surface facing the support member with the ejection surface having a plurality of nozzles for ejecting a liquid onto the conveyed medium; and a protecting member provided between the ejecting surface and the conveyed medium, arranged in a position fixed relative to the support member, and having an open part that allows passage of the liquid ejected from the liquid ejection head.

Abstract: Printers and apparatus to clean printer surfaces are disclosed. An example apparatus to clean a surface in a printer includes an endless cleaning material loop and an advancer to advance the cleaning material loop when the loop is not engaged with the surface and to not advance the loop when the loop is engaged with the surface.

Abstract: A drum maintenance system for use in an imaging device includes a reservoir having a supply of release agent, and an applicator configured to receive release agent from the reservoir and to apply the release agent to an intermediate imaging surface of an imaging device. A first metering blade is positioned in wiper mode at a first position adjacent the intermediate imaging surface and configured to meter the release agent on the intermediate imaging surface applied by the applicator. A second metering blade is positioned in wiper mode at a second position adjacent the intermediate imaging surface.

Abstract: A droplet ejection head control device includes a pressure alteration section, a detector and a controller. The droplet ejection head is provided with plural nozzles and is supplied with a liquid. The pressure alteration section alters a pressure inside the droplet ejection head. The detector detects a position of a boundary of liquid which is exuded onto a nozzle face from at least one nozzle of the droplet ejection head in accordance with the pressurization at the inside of the droplet ejection head. After the pressurization of the interior of the droplet ejection head commences, the controller controls the pressure alteration section on the basis of detection results from the detector such that the pressurization is stopped just (immediately) before respective boundaries of the liquid exuded onto the nozzle face from neighboring nozzles come into contact.

Abstract: In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly.

Abstract: A droplet ejecting head is formed with at least one nozzle and is configured to eject a liquid droplet through the at least one nozzle in a nozzle axis direction. A carriage supports the droplet ejecting head. A guide member extends in a predetermined direction and is configured to guide the carriage so that the carriage is movable in the predetermined direction. A moving section moves the carriage along the guide member. The droplet ejecting head is configured to eject a liquid droplet through the at least one nozzle onto an ejection object while the moving section moves the carriage. A vibration generating section vibrates the droplet ejecting head in such a manner that vibration of liquid held in the at least one nozzle includes a component in the nozzle axis direction.

Abstract: A head cap for protecting an ink ejecting face of an ink-jet head may be provided with a plate member. The plate member may be opposed to the ink ejecting face. The head cap may include a flexible, continuous lip, which projects from one surface of the plate member. Recesses may be formed in the one surface of the plate member. Through-holes may be formed through the bottom walls of the recesses, respectively. Films may further be used where each covers the associated through-hole and is joined partially to a circumferential edge portion of the associated recess.

Abstract: A fluid discharging apparatus including a head that has a nozzle which discharges fluid from the nozzle and a sheet shaped wiping member for wiping a nozzle surface of the head. The wiping member is moved relative to the nozzle surface so that portions of the wiping member are sequentially in contact with the nozzle surface in order to wipe the nozzle surface.

Abstract: A page wide array printer comprises a print head bar which carries an array of print nozzles, and which is static during a printing operation. A carriage has print head service elements. The print head bar is movable perpendicularly to the plane of the print medium beneath the print head, between a lowered print position and a raised service position. The carriage is moveable along the print head to perform a service operation when the print head is in the raised position.

Abstract: An ink jet recording head comprising a discharge port for discharging an ink; and a sealing tape for sealing the discharge port; wherein the sealing tape includes a pressure-sensitive adhesive layer constituted of an acrylic crosslinked polymer formed by crosslinking an alkyl(meth)acrylate ester copolymer with a metal chelate compound, and is peelably adhered, through the pressure-sensitive adhesive layer, to a part where the discharge port is formed.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head disposed on a transport path of a target to eject a liquid from nozzles at a nozzle forming surface, a target transport unit transporting the target such that the target passes through a position opposite the nozzle forming surface on the transport path, and a liquid receptor transport unit transporting a liquid receptor for receiving the liquid ejected from the nozzles as a waste liquid such that the liquid receptor passes through the position opposite the nozzle forming surface on the transport path. With rotation of the target transport unit, a mechanism unit including a target transport member for transporting the target in a transport direction is able to be attached and detached at a position out of a mechanism portion of the liquid receptor transport unit with respect to the liquid ejecting apparatus.

Abstract: A recording apparatus includes: a plurality of recording heads each of which includes an ejection surface; a head frame; at least one annular protrusion; a support tray; and a moving device. One or more positioning pins are provided in an inner area of the support tray that is enclosed with the annular protrusion, the positioning pins extending in a direction perpendicular to a flat surface which includes a contact portion of the annular protrusion that is come into contact with the head frame, and the head frame has one or more positioning holes into which the positioning pins are insertable in the contact state of the annular protrusion.

Abstract: A nozzle inspection device includes an inspection electrode placed apart from a discharge unit with a gap therebetween, an inspection unit for inspecting the presence of a defective nozzle by discharging a fluid with respect to the inspection electrode in a state in which the electric field is generated by application of a voltage between the discharge unit and the inspection electrode, a detection unit for detecting whether the inspection unit is in a non-inspectiable state, and a gap adjustment unit for adjusting the gap by transferring either the discharge unit or the inspection electrode in a case in which the inspection unit is in the non-inspectable state.

Abstract: A baffle for use in a printer to protect a printhead from particulates associated with a printing medium. The baffle including a member, incorporated within the printer, that is positioned below the printing medium and above the printhead. The member having a top surface that is angled and extends a width of the printing medium and an adhesive material disposed on the angled top surface, the adhesive material. The angled top surface being positioned to generally face toward the printing medium to trap the printing medium particulates on the adhesive material of the angled top surface.

Abstract: A printing control method for a serial inkjet printer prevents paper dust that is dispersed by the air current produced by a vacuum platen from adhering to the ink nozzle area. An inkjet head that prints while moving along the width of the vacuum platen is moved to a position where the ink nozzle area is outside of a first or second retraction position separated a first distance from the first and second paper edge positions of the recording paper, and the recording paper is then advanced. Paper dust and other dust particulate does not adhere to the ink nozzle area when the paper is advanced because the ink nozzle area does not stop in the first and second paper edge positions of the recording paper where paper dust and other dust particulate can be made airborne by the air current produced by the vacuum platen.

Abstract: An image-forming apparatus includes a head unit configured to include line-type recording heads for ejecting ink droplets, a transport mechanism disposed facing the recording head and configured to transport a sheet, a maintain-recovery mechanism disposed downstream from the transport mechanism in a direction in which the sheet is transported and configured to maintain and recover the line type recording heads, and a head drive mechanism configured to move the head unit between a position facing the transport mechanism and a position facing the maintain-recovery mechanism in the direction in which the sheet is transported.

Abstract: In an ink jet print head formed with ejection nozzles, which may use a wiping member to wipe ink adhered to the surface of the ink jet print head, it is desired to be able to perform a wiping operation in any environment without requiring a large amount of space to accommodate the liquid used during the wiping operation. To this end, a cooling unit is used which can produce water by cooling the atmosphere. This cooling unit is operated to produce water, which is brought into contact with and transferred onto the wiping member before the wiping member performs wiping.

Abstract: An image forming apparatus calculates an ink temperature considering a thermal capacity near nozzles and an ink circulation flow quantity of a circulation pump in addition to an ink temperature when flowing into a recording head and an ink temperature when flowing out of the recording head, and accurately estimates a waste amount of the ink ejected from the nozzles in, e.g., maintenance processing other than image formation.

Abstract: An inkjet recording apparatus includes an inkjet head, a tank in which liquid to be supplied to the inkjet head is retained, and a flow path for connecting the inkjet head and the tank to each other. The inkjet head includes a head main body, liquid chambers which are built in the head main body, and in which liquid is kept under negative pressure, a nozzle plate bonded to the head main body in such a manner that the plate constitutes one wall part of each of the liquid chambers, nozzles formed in the nozzle plate in such a manner that the nozzles communicate with the liquid chambers, drive elements for causing the nozzles to eject liquid droplets, and first suction holes formed in the nozzle plate in such a manner that the holes communicate with the liquid chambers.

Abstract: An ink jet system according to the present invention is provided with an air bubble removing unit including: an ink jet body having a plurality of ink supply path; a nozzle plate connected to an end of the ink jet body and having a plurality of spaced nozzle holes therein; and a cap configured to cover the nozzle holes formed in the nozzle plate wherein a first ink channel space is formed continuous to the nozzle holes and the plurality of ink supply path, and a second ink channel space is formed between a recess of the cap and a surface of the nozzle plate, so that the second ink channel space and the first ink channel space are continuous through the nozzle holes.

Abstract: An ink circulation type inkjet printer includes a maintenance controller configured to: (1) allow a maintenance mechanism to execute maintenance processing for a plurality of inkjet heads before a present printing job under three conditions that: (c1) an elapsed time from a last printing job to a present printing job is less than a first reference time; (c2) the present printing job requests for ejecting ink from unused nozzles of multiple nozzles of the plurality of inkjet heads in the last printing job; (c3) the elapsed time is more than a second reference time; (2) allow the ink circulation type inkjet printer to perform the present printing job without the maintenance processing for the plurality of inkjet heads when the elapsed time is less than the predetermined second reference time.

Abstract: A head cleaning device includes an electrode disposed in a position confronting to a bottom of a head in a cleaning position, the head including nozzles for discharging a water-soluble ink, the electrode being set in a covered state to provide a surface covered with an electrolyte which, when electrolyzed, dissolves the water-soluble ink. A liquid supplying unit supplies the electrolyte to the electrode so that the electrode is set in the covered state. A voltage supplying unit supplies a voltage between the head and the electrode to electrolyze the electrolyte on the surface of the electrode in the covered state.

Abstract: In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly.

Abstract: A method and apparatus raise and lower a web support and move a cap over and above the web support.

Abstract: A mobile device that is (a) an inkjet printhead, (b) a print media feed path extending past the printhead, (c) a capping mechanism with a capper moveable between a capping position, in which the capper is urged into a capping relationship with the printhead, and an uncapped position, where the capper is spaced from the printhead, and (d) a locking mechanism configured to move the capper to the uncapped position in response to engagement with the media such that the capper returns to the capped position upon disengagement with the media.

Abstract: A printhead maintenance station includes a housing operatively positioned with respect to an ink ejection face to be maintained. The housing defines a pair of slots. A support arm has lugs at each end that are slidably received in respective slots. A support is mounted on the support arm. A pad is mounted on the support and is suitable for wiping ink. A motor is operatively mounted with respect to the housing. A pair of cams is rotatable by the motor and engaged with respective lugs such that the motor can slide the arms with respect to the housing, thereby moving the pad between a first operative position and a second, inoperative position.

Abstract: An inkjet printer has a body mounting first and second gear assemblies. The first assembly cooperating with a motor gear and having a code feature. The second assembly rotatably cooperating with the first assembly and a capper for capping a printhead. The code feature cooperates with a holding feature of a mounting arrangement used to mount the second assembly so that the cooperation maintains the first assembly at a predetermined position during the mounting of the second assembly. The first assembly has first and second gears connected by a common shaft. The first gear meshes with the motor gear and the second gear meshes with the second assembly. The second assembly has a third gear mounted to the body by a pin which meshes with the second gear. The third gear is an eccentric gear.

Abstract: A printhead maintenance assembly for removing particulates from an ink ejection face of a printhead. The assembly comprises: pressure means for flooding the face and thereby dispersing the particulates into flooded ink; a first transfer roller having a transfer surface for receiving the flooded ink; a transfer mechanism for rotating the first transfer roller; and an ink removal system for removing ink from the transfer surface. The ink removal system comprises a second transfer roller engaged with the first transfer roller.

Abstract: A droplet ejection apparatus includes: a droplet ejection head that ejects droplets; a conveying member that retains a recording medium and conveys the recording medium with facing the recording medium to the droplet ejection head; a coating member that coats the conveying member with a coating liquid having a repellant property to the liquid ejected from the droplet ejection head; and a cleaning member that cleans the conveying member. The droplet ejection apparatus satisfies the following formulae L3?L1, L2?L1??(1) wherein, in a direction orthogonal to the conveying direction; L1 is the width of ink droplet ejecting of the droplet ejection head; L2 is the width of coating the coating liquid on the conveying member by the coating member; and L3 is the width of the cleaning of the conveying member by the cleaning member.

Abstract: A recording apparatus includes: a conveyor which has one or more holes penetrating from a first surface to a second surface thereof, and which conveys, in a conveyance direction, a recording medium supported on the first surface; and a recording unit which is at such a position as to face the first surface, and records an image on a recording medium while the recording medium is conveyed by the conveyor. The recording apparatus further includes an exhauster capable of causing air exhaust through the one or more holes so that airstream in the one or more holes is directed from the second surface to the first surface; and a controller which controls the exhauster so as to cause air exhaust through at least one medium-facing hole out of the one or more holes, the medium facing hole being a hole facing a recording medium.

Abstract: An inkjet printer 1 includes an inkjet head 31 with nozzles for discharging ink, a pressurizer for pressurizing a route for ink supply to the inkjet head 31, a head driver 6 for driving the inkjet head 31, and a controller 8 operable for control the pressurizer to pressurize the route for a prescribed time to have fluxes of ink once spilt out of the nozzles and to render nozzles covered with spilt ink before use of the head driver 6 to drive the inkjet head 31 for discharge operation in a maintenance service to the inkjet head 31.

Abstract: Hard imaging devices and methods are described. According to one arrangement, a hard imaging device includes a media transport system configured to move media along a media path and a print device adjacent to the media path and configured to eject a plurality of droplets of a liquid marking agent in a direction towards the media moving along the media path to form hard images using the media. The ejection of the droplets of the liquid marking agent by the print device creates satellites of the liquid marking agent suspended in air in a region adjacent to the print device and the media. The device also includes a satellite removal system in one arrangement to remove the satellites from the air in the region adjacent to the print device and the media.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head disposed on a transport path of a target to eject liquid from nozzles at a nozzle forming surface, a target transport unit transporting the target on the basis of a driving force of a first driving source such that the target passes through a position opposite the nozzle forming surface on the transport path, a liquid receptor transport unit transporting a liquid receptor for receiving the liquid ejected from the nozzles as a waste liquid on the basis of a driving force of a second driving source such that the liquid receptor passes through the position opposite the nozzle forming surface on the transport path, and a control unit controlling a driving state of the second driving source in order to change a transport velocity of the liquid receptor by the liquid receptor transport unit while the liquid receptor is transported.

Abstract: An apparatus for use as part of an inkjet printer to clear an ink drop stalagmite in the printer. In one embodiment the apparatus includes a clearing device coupled to an access door of the inkjet printer, wherein upon operation of the access door the clearing device at least partially clears the ink drop stalagmite.

Abstract: A fluid ejector head includes a die with a plurality of fluid ejector units, each fluid ejector unit comprising a pumping actuator having a drive electrode, and a manifold that contacts the first side of the die to define a module volume in fluidic communication with a drainage volume. The module volume is defined in part between the manifold and at least a portion of plurality of fluid ejector units, and the drainage volume is located apart from the fluid ejector units. The module volume, in comparison to the drainage volume, has a greater ratio of interior surface area to volume or has a greater percentage of interior surface area covered by a non-wetting coating.

Abstract: An object of this invention is to prevent prolongation of the time taken for a suction recovery operation while suppressing wasteful consumption of ink in the suction recovery operation. An ink-jet printing apparatus includes a plurality of caps which, when a plurality of nozzles of an ink-jet head are divided into a plurality of nozzle groups, are arranged one by one for the respective nozzle groups, and cap the respective nozzle groups, a suction pump which generates a negative pressure in the plurality of caps to suck ink from the plurality of nozzles, and is arranged commonly for the plurality of caps, and a control unit which controls the suction pump so as to make the negative pressure by the suction pump act on all the caps when a common negative pressure is generated in the plurality of caps, and make different negative pressures by the suction pump act sequentially on the plurality of caps when different negative pressures are generated in the respective caps.

Abstract: A maintenance station of an inkjet printer mounted in a housing of the inkjet printer includes an ink cup rotationally and slidably coupled to the housing about/along an axis of rotation. The ink cup has a basic plate and a columnar rim around the basic plate. The columnar rim respectively defines a plurality of stopping ratchets and driving ratchets with the same gradient direction at a bottom and top thereof. A moving body is slidably disposed in the housing of the inkjet printer. An actuator movably disposed in the moving body moves together with the moving body, a tail of the actuator stretches out from the moving body for matching with the driving ratchets to rotate the ink cup. A plurality of housing ratchets are disposed in the housing of the inkjet printer and arranged into a ring for matching with the stopping ratchets to prevent the ink cup reversion.

Abstract: An ink jet recording element substrate includes a substrate; an ejection outlet array for ejecting ink; a heat generating element array comprising a plurality of heat generating elements for generating ejection energy for ejecting the ink from the ejection outlet array; a protecting film, comprising protecting portions, for protecting the heat generating element array; a common line, disposed along a side of the heat generating element array, for supplying electric power for driving the heat generating elements, and being divided into at least two portions by a line perpendicular to the heat generating element array; a testing electrode for testing a function of the protecting film; and an externally connecting electrode, disposed at an end of the substrate, for externally supplying electric power to the common line; wherein the ink jet recording element substrate further includes, in an area between the portions of the common line, a connecting line for electrically connecting the protecting portions of the

Abstract: A cleaning apparatus for a roller includes a platen roller and a cleaning roller brought into contact with the platen roller to clean a surface of the platen roller, where the cleaning roller is configured such that SP values (dissolution parameter) of the cleaning roller and of all additives added in the cleaning roller have differences of at least 2.0 from an SP value of the platen roller.

Abstract: An ink-jet recording apparatus including: a cartridge mount; a recording head; an ink passage; an ink discharger; and a controller. An ink cartridge that stores ink is to be replaceably mounted on the cartridge mount. The recording head ejects the ink toward a recording medium. Through the ink passage, the ink is supplied from the cartridge mount to the recording head. The ink discharger discharges the ink. The controller includes a cartridge judgment section and a discharger control section. The cartridge judgment section judges whether the ink cartridge mounted on the cartridge mount is a subject cartridge that satisfies a predetermined condition or not. The discharger control section controls the ink discharger to discharge at least the ink in the ink passage when the cartridge judgment section has judged that the ink cartridge mounted on the cartridge mount is the subject cartridge.

Abstract: There is provided an apparatus for cleaning an inkjet print head and an inkjet printer having the same. The apparatus for cleaning the inkjet print head includes a cleaning plate spaced apart from the inkjet print head with a cleaning area interposed therebetween, the inkjet print head ejecting ink through a nozzle; an electrode part allowing residual ink remaining at an end portion of the nozzle to be moved outwardly of the cleaning plate; and a power supply part electrically connecting the inkjet print head to the electrode part.

Abstract: A printing assistance apparatus for a media width printhead, the apparatus having: an elongate platen having a surface for supporting media across the media width during printing on the media by fluid ejection nozzles of the printhead; and a wick element positioned within the platen for wicking fluid ejected by the nozzles from the supporting surface, the wick element having an elongate body positioned within the platen and a plurality of pads projecting from the body along the longitudinal length body toward the printhead, the pads being separated by notches.

Abstract: A plurality of recording head units are supported by a holder in an integrated manner. The recording head units and pairs of rollers which hold a sheet are arranged alternately along a sheet conveying direction. An elastic member is disposed in a clearance between the holder and each of the recording head units supported by the holder in an elastically deformed manner to form an airtight seal. The airtight seal prevents upward leakage, from the clearance, of the humidifying gas introduced into the narrow space to which ink nozzles of the recording head units are exposed.

Abstract: A cleaning roller is arranged at a position facing an image sensor with a conveying belt interposed therebetween. The conveying belt has a through hole. In an image sensor cleaning mode, the cleaning roller is inserted through the through hole and contacts the image sensor, while the image sensor is held without moving.

Abstract: The invention provides a liquid ejecting apparatus which can prevent a target having liquid ejected thereon from warping irrespective of the type of the target. An ink jet printer includes a recording head configured to eject ink from a nozzle formed on a nozzle-formed surface onto a recording sheet being transported from an upstream side to a downstream side, and a plurality of supporting belts arranged so as to oppose the nozzle-formed surface and each having a supporting portion extending along the direction of transport of the recording sheet. The respective supporting belts are arranged so as to be capable of moving along the width direction intersecting the direction of transport of the recording sheet.

Abstract: A liquid removal apparatus which removes liquid on a base material, has; an absorbing member which absorbs and removes the liquid on the base material by making contact with or by approaching to the liquid; an internal rotating body which is disposed inside a hollow portion of the absorbing member and has an opening section in an outer circumferential surface of the internal rotating body; a pressure reducing device which reduces pressure of the hollow portion of the absorbing member, an internal rotating body drive device which causes the internal rotating body to rotate relatively with respect to the absorbing member; a movement device which causes relative movement of the base material with respect to the absorbing member and the internal rotating body; and an internal rotating body drive control device which controls the internal rotating body drive device.

Abstract: An inkjet drawing apparatus includes a head module which holds a droplet jetting head provided with a nozzle for ejecting droplets, and which is unmovable in a horizontal direction, and a drawing table which supports a recording member on an upper surface, and which is movable in the horizontal direction. The inkjet drawing apparatus executes a prescribed drawing by ejecting the droplets onto the recording member from the droplet jetting head. A maintenance unit transfer mechanism is movable within a prescribed region including a position under the head module, and transfers a maintenance unit for conducting a maintenance of the droplet jetting head toward the position under the head module, and executes positioning of the maintenance unit with respect to the droplet jetting head. A maintenance unit selecting/arranging mechanism selects one of a plurality of kinds of maintenance units, and places the selected maintenance unit on the maintenance unit transfer mechanism.

Abstract: An inkjet printer includes a printhead integrated circuit (IC) with an array of nozzles for ejecting ink on to print media; an ink supply reservoir for storing ink; an ink supply line defining a flow path from the ink supply reservoir to the printhead IC; a valve in the ink supply line proximate the printhead IC selectively closing the flow path to the printhead IC; an ink purge actuator for forcing a volume of ink out of the printhead under pressure; a printhead maintenance system having a collection roller for rotating such that the collection roller surface collects ink purged from the printhead and draws the ink away; and a pressure regulator provided in the ink supply reservoir downstream from the ink supply reservoir. The pressure regulator is normally biased shut, and operable to open upon a threshold pressure difference between ink upstream of the pressure regulator and ink downstream of the pressure regulator.

Abstract: An inkjet recording apparatus, method and computer readable medium are provided. The inkjet recording apparatus includes a recording head comprising a nozzle formation surface having a plurality of ink discharging nozzles formed thereon; a wiper which has elasticity and wipes the nozzle formation surface by pressingly contacting against the nozzle formation surface of the recording head; and a moving unit which moves at least one of the recording head and the wiper to wipe the nozzle formation surface at a first relative speed and moves the at least one of the recording head and the wiper to separate from each other at a second relative speed, which is less than the first relative speed. The method includes moving at least one of the inkjet recording head and the wiper relative to each other so that the wiper wipes the nozzle formation surface at a first relative speed; and separating the wiper from the inkjet recording head at a second relative speed, which is less than the first relative speed.

Abstract: An image forming apparatus includes a reference surface that is partitioned into an array of chambers; an image forming head for forming an image on a media; and a source of negative pressure. The array of chambers is in fluid communication with the source of negative pressure. An overprint trough is positioned neighboring the array of chambers. The overprint trough includes a side wall with a plurality of vent holes to direct airborne ink mist produced by the image forming head away from a back side of the media.