Abstract: A printing fluid cartridge includes a front face oriented toward a first direction, a printing fluid supply portion positioned at the front face, a rear face positioned opposite the front face and oriented toward a second direction opposite the first direction, at least one electrical interface positioned between the front face and the rear face, and an engagement surface facing in the second direction. The at least one electrical interface is offset from the printing supply portion with respect to a third direction perpendicular to the first direction and the second direction. The at least one electrical interface is positioned closer to the front face than the engagement surface is, and the at least one electrical interface and the engagement surface intersect a plane which is parallel with the first direction, the second direction, and the third direction.

Abstract: An ink cartridge includes: an ink storage container configured to store ink; a socket portion provided at one end of the ink storage container and configured to be fitted to and detached from a joint portion of a printing machine; an ink supply port provided in the socket portion; an inside plug configured to seal an ink passage to the ink supply port by using a biasing force coming from a direction of the ink storage container; and an inside plug lock portion configured to lock the inside plug at a position where the inside plug is pressed by an insertion shaft, and maintain a locked state of the inside plug independently of a retreating of the insertion shaft to a retreat position after a locking of the inside plug.

Abstract: A fluid cartridge for an inkjet printer includes an inner reservoir containing a printing fluid. The reservoir includes walls enclosing an internal space having a variable volume for storage of the printing fluid and a port for dispensing the printing liquid. The reservoir includes a rigid framework and one or more elastically deformable sections. The cartridge further includes an outlet for connection to the printer, an outer housing in which the reservoir is housed, an electronic storage device configured to store data relating to the contents of the cartridge, and at least one electrical contact associated with the electronic storage device and provided on a substrate. The reservoir provides a reduction in pressure of the internal space whereby the equilibrium pressure difference between the internal space and the surrounding atmosphere increases substantially monotonically in magnitude as liquid is dispensed.

Abstract: A cover for a liquid container which exposes at least a portion of a detecting member, having a liquid supply portion to a liquid ejecting apparatus through communicating with the liquid containing unit, and a first surface provided with a first container side engagement portion arranged between the liquid supply portion and the detecting member. The cover includes a first cover side engagement portion engaging with the first container side engagement portion.

Abstract: In a liquid containing vessel that is inserted in the ?Y axis direction with regard to a mounting section, a substrate support member includes a substrate support section configured to hold a substrate, a first side wall along the Y axis and the Z axis, the first side wall being provided more to the +X axis direction side than the substrate support section, and a first ridge section protruding from the first side wall in the ?X axis direction and configured to engage with a first apparatus side engaging section that protrudes in the +X axis direction in the apparatus side terminal section.

Abstract: A cartridge includes a substrate and an engagement portion. The first surface faces a first direction and has a first surface on which an electrical terminal is disposed. The engagement portion includes a second surface disposed upstream from the substrate in the first direction and a third surface. The second surface faces a second direction, which forms an obtuse angle with the first direction. The third surface faces a third direction, which forms an acute angle with the first direction. The third surface does not overlap with the substrate in the first direction and the third surface is disposed downstream from the second surface in the first direction.

Abstract: An elongate ink distribution member for mounting a printhead integrated circuit. The ink distribution member includes a plurality of longitudinally extending ink supply channels and a mounting surface having a plurality of ink supply conduits defined therein. The ink supply conduits are arranged in sets with each set of ink supply conduits being in fluid communication with a respective one of the ink supply channels. The ink supply conduits extend generally transversely from an upstream outer region towards a downstream inner region of the mounting surface.

Abstract: The invention provides a technique for raising the reliability of contact between contact members of a liquid ejection device and terminals of a cartridge. A cartridge is configured to be removably mounted to a liquid ejection device including a first engaging portion and a conductive contact member that has elastic force and that is arranged so as to be adjacent to the first engaging portion. The cartridge includes a terminal arranged so as to be able to come into contact with the conductive contact member, and a first hook that can be engaged with the first engaging portion.

Abstract: A pressure bag for in a fluid cartridge having an opening in open connection with a channel in a wall of the fluid cartridge.

Abstract: A backpressure control unit that introduces a liquid from an external liquid holding unit and supplies the liquid to a main head unit for ejecting the liquid via a nozzle opening includes a flow channel member having an introduction channel, a valve member, and a supply channel, and a cover that that combines a base portion and a cover portion and houses the flow channel member therewithin. This provides a backpressure control unit that improves yields by absorbing discrepancies in properties of backpressure control valves to the greatest extent possible while at the same time making it possible to change designs in a flexible manner.

Abstract: A cartridge comprises an ink supply structure, a terminal bearing structure, and a first restriction portion. The terminal bearing structure has terminals arranged in a terminal plane which is neither parallel nor perpendicular to a plane defined by a mounting direction leading edge of the ink supply structure, so that the contact portions of the terminals receive a force in a direction opposite from the mounting direction. An engagement portion of the first restriction portion is provided at a position adjacent to the terminal bearing structure.

Abstract: A printing apparatus adapted to have a cartridge detachably mounted thereon includes a cartridge mounting structure, a printing material supply tube, a plurality of apparatus-side terminals and a lever used for attachment and detachment of the cartridge to and from the printing apparatus. The lever has an operating member, a first apparatus-side locking portion and an axis of rotation. When an external force is applied to the operating member of the lever from the +X-axis direction to the ?X-axis direction, the lever moves the first apparatus-side locking portion about the axis of rotation from a specified locking position toward the +X-axis direction and disengages the first apparatus-side locking portion from a first cartridge-side restriction portion, so as to eliminate the restriction of motion of the cartridge. This ensures stable electrical connection between cartridge-side terminals and apparatus-side terminals.

Abstract: A liquid cartridge is detachably attachable to an apparatus body of an image forming apparatus. The liquid cartridge includes a cartridge case, an information memory element, and a holding unit. The cartridge case includes at least two dividable case parts. The at least two dividable case parts form a front face of the cartridge case to face the apparatus body when the liquid cartridge is attached to the apparatus body. An information memory element is held at the front face of the cartridge case. The holding unit is provided in one of the at least two dividable case parts to hold the information memory element with only the one of the at least two dividable case parts. The holding unit includes a groove to receive the information memory element and a displaceable claw to hold the information memory element between the groove and the claw.

Abstract: An inkjet ink including: water; a water-soluble organic solvent; a pigment; polycarbonate modified urethane resin particles; an ultraviolet absorber; and a light stabilizer.

Abstract: A liquid storage container which is mounted on a printer ejecting a liquid includes a liquid storage chamber that stores the liquid therein, a liquid supply portion that supplies the liquid to the ejecting head, a device chamber that is provided in a pathway supplying the liquid from liquid storage chamber to the liquid supply portion and includes a device in the inner portion thereof, and an air chamber that is provided in a pathway supplying air from the outside to the liquid storage chamber according to a decrease of the liquid in the liquid storage chamber, is filled with air in the inner portion, and prevents the liquid from being leaked to the outside by trapping the liquid when the liquid flows backward from the liquid storage chamber. In addition, among walls which surround the device chamber, at least one wall is adjacent to the air chamber.

Abstract: A liquid container includes an container main body provided with a liquid accommodation portion for accommodating a liquid in an inner portion and a liquid supply portion which communicates with the liquid accommodation portion and has an opening for causing the liquid of the liquid accommodation portion to flow to the outside; a cap member which is mounted on the container main body in a detachable manner so as to seal the opening of the liquid supply portion and, together with the liquid supply portion, forms an inner chamber by partitioning; and a first communication path which communicates the inner chamber with the outside.

Abstract: There is provided a protective cap configured to be installed into a liquid cartridge installation section having a liquid supply tube in fluid connection with a recording head for jetting a liquid via a flexible tube. The protective cap includes: an chamber defined by a case in a liquid-tight manner; a liquid absorbing member filled in the chamber; a connecting portion having a connecting channel in communication with the chamber and configured to be connected with the liquid supply tube; and an atmosphere communication portion via which the chamber communicates an outside of the case.

Abstract: A liquid discharge apparatus includes an ink tank configured and arranged to retain a plurality of types of ink including sedimentary ink, a head configured and arranged to discharges the ink, and an ink supply path section configured and arranged to supply the ink from the ink tank to the head. The ink supply path section includes a Cableveyor (registered trademark) accommodating a plurality of ink tubes. A plurality of ink tubes for the sedimentary ink among the plurality of ink tubes are mounted at the same height in a height direction inside the Cableveyor (registered trademark).

Abstract: A process for preparing an encapsulated particulate solid using an epoxy functional cross-linking agent and a carboxylic acid functional dispersant wherein the cross-linking agent has one or more oligomeric dispersing group and/or the dispersant has an acid value of at least 125 mg KOH/g. The resultant solids are useful in, for example, ink jet printing inks.

Abstract: An ink cartridge for an inkjet printer includes a bottom face and a front face; an ink interface on the front face of the ink cartridge for connection to a cartridge receiving structure; a guide interface in the bottom face for guiding the cartridge along a straight line during insertion into the cartridge receiving structure for connecting the ink interface; a latch track disposed in the bottom face of the ink cartridge to guide a latch of the cartridge receiving structure; a latch stop disposed in the latch track for engaging the latch, where the latch track comprises a locking track and an unlocking track to accommodate movement of the latch with respect to the latch stop, the locking track being at least partly separate from the unlocking track; and a latch guide for redirecting the latch towards the locking track, rather than the unlocking track.

Abstract: A recording apparatus includes a housing body, an opening/closing member, attached to the housing body via a pivot shaft so as to be capable of rotating freely, that covers the surface of the housing body on one side thereof, and an ink tank having an injection port for filling an ink holding chamber with ink used in recording. Here, the ink tank is disposed so that one end thereof is positioned within the housing body on the opposite side of the housing body as the side in which the pivot shaft is provided, and has a stepped shape including a step portion, the step portion being provided on a side of the ink tank that is further from the pivot shaft. The injection port is provided in the step portion, and when the opening/closing member is opened and the ink is to be filled.

Abstract: To provide a photopolymerizable composition, which includes photopolymerizable monomers containing glycerol dimethacrylate, caprolactone-modified dipentaerythritol hexaacrylate, and diethylene glycol dimethacrylate, wherein an amount of the glycerol dimethacrylate in the photopolymerizable monomers is 25% by mass or greater.

Abstract: A cartridge configured to be mounted to a liquid ejection apparatus that has an electrical connection portion and an engagement portion, and having an engaging portion for engaging the engagement portion and a plurality of electrodes for connecting to the connection portion. The electrodes have contact portions for contacting the connection portion, with a first group of a plurality of the contact portions constituting a first array whose contact portions are aligned in an X-axis direction intersecting a mounting direction of the cartridge, and a second group of the plurality of the contact portions constituting a second array whose contact portions are aligned in the X-axis direction. The first and second arrays are aligned in a direction intersecting the X-axis direction, and the engaging portion and an area between the first array and the second array are aligned in the X-axis direction.

Abstract: A printing apparatus includes an ink container tray which is capable of holding an ink container, a guide portion which guides the ink container tray in a movable manner between an ink container mounting position when mounting the ink container onto the ink container tray and an ink supply position, and a locking mechanism which, when moving the ink container tray, which is positioned further at the ink container mounting position side than a predetermined position between the ink supply position and the ink container mounting position, further to the ink supply position side than the predetermined position, stops the ink container tray from moving further to the ink supply position side than the predetermined position.

Abstract: An image forming apparatus includes a treatment-liquid application unit applying a treatment liquid from a chamber to a recording medium; a treatment-liquid storage unit to store the liquid; a supply channel member forming a supply channel to supply the liquid from the treatment-liquid storage unit to the chamber; a collection channel member forming a collection channel to collect the liquid from the chamber; and a temporary storage portion disposed in the collection channel to temporarily store the liquid. The temporary storage portion has an internal horizontal cross-sectional area greater than a channel cross-sectional area of the collection channel. The collection channel member has a first channel portion of a channel cross-sectional area smaller than the internal horizontal cross-sectional area of the temporary storage portion. A liquid level of the liquid in the collection channel is maintained in the first channel portion after termination of collecting operation.

Abstract: A liquid ejecting apparatus includes: a liquid ejecting head that ejects liquid which is supplied from two or more liquid housing portions that house liquid; two or more housing portion side flow paths which are provided to correspond with each of the liquid housing portions and which supply liquid from an upstream side that is a side of the liquid housing portions to a downstream side; and a flow mechanism which is capable of causing liquid to flow in the housing portion flow paths, and the flow mechanism causes liquid to flow in a housing portion side flow path corresponding with a liquid housing portion that does not supply liquid for a predetermined time set in advance among the housing portion side flow paths.

Abstract: An ink cartridge includes a cartridge body, an ink supply portion and an air communication portion provided at the cartridge body, a block member and a slider. The air communication portion has an inner peripheral wall defining an air passage, and a communication port for allowing communication between an ink chamber and the air passage. The block member moves from a first position to a second position by contact with the slider sliding in a sliding direction to block and open the air passage. The slider includes: a first cylindrical portion having an upstream through-hole penetrating therethrough; a second cylindrical portion having a downstream through-hole penetrating therethrough and communicating with the upstream through-hole; and a semipermeable membrane closing the upstream through-hole. The slider has a contact portion in close contact with the inner peripheral wall and positioned upstream of the block member at the first position in the sliding direction.

Abstract: An inkjet recording ink, including: water; a water-soluble solvent; a pigment; and a phosphoric acid group-containing copolymer, wherein the phosphoric acid group-containing copolymer contains at least a structural unit represented by General Formula (1) and a structural unit represented by General Formula (2): where in General Formula (1), R1 represents a hydrogen atom or a methyl group, M+ represents a proton, an alkali metal ion, or an organic ammonium ion, k and l are each an integer of 0 to 6, with the proviso that the case where k and l are 0 at the same time is excluded, where in General Formula (2), R2 represents a hydrogen atom or a methyl group, R3 represents an alkyl group having 1 to 4 carbon atoms, n and m are each an integer of 0 to 30, with the proviso that n+m is 2 to 30.

Abstract: A liquid container and an apparatus in which the liquid container is mountable are provided, the liquid container and the apparatus enabling the presence or absence of remaining liquid to be checked without the need for a power source and even after the liquid container is removed. The pressure in a communication path is maintained while ink in a containing section is not supplied to the exterior. Thus, the displacement state of a detection valve which is displaced depending on the pressure in the communication path can be maintained even after removal of an ink tank.

Abstract: Provided is an ink containing a self-dispersible pigment, a polyurethane polymer particle, a surfactant, a water-soluble organic solvent, and water. The surfactant includes a fluorinated surfactant represented by Formula (1) and having an HLB value determined by a Griffin method of 11 or less. The water-soluble organic solvent includes at least one water-soluble organic solvent selected from a specific group, and the total content of the water-soluble organic solvents of the specific group is higher than the total content of the water-soluble organic solvents other than the solvents of the specific group.

Abstract: A vacuum piston device used in ink supply system, includes: a cylindrical piston body; a conic bulge set at a central area of a frontal end face of the cylindrical piston body; and a piston lid mounted at a rear end face of the cylindrical piston body; at least one exhaust pore is set on the frontal end face around the conic bulge and all the way goes through to the rear end face; an annular groove is formed on the rear end face in such a manner that inner and outer walls of the annular groove project out from the rear end face; the piston lid is for covering the annular groove, and eventually for sealing the whole piston.

Abstract: An ink for inkjet recording includes water; a hydrosoluble organic solvent; a pigment; and a polymer including a first structural unit represented by the following formula (1): wherein R1 represents a hydrogen atom or a methyl group; and M+ represents at least one member selected from the group consisting of alkali metal ions, organic amine ions and hydrogen ions; and a second structural unit represented by the following formula (2) or (3): wherein each of R2 and R3 represents a methyl group or a hydrogen atom; n represents an integer of 18; x represents 0 or an integer of 2.

Abstract: Provided is an ink containing a self-dispersible pigment, an acrylic resin particle, a surfactant, a water-soluble organic solvent, and water. The surfactant includes a fluorinated surfactant represented by Formula (1) and having an HLB value determined by a Griffin method of 11 or less. The water-soluble organic solvent includes at least one water-soluble organic solvent selected from a specific group, and the total content of the water-soluble organic solvents of the specific group is 4 times or more the total content of the water-soluble organic solvents other than the solvents of the specific group. The total content of the self-dispersible pigment and the acrylic resin particle is 10% by mass or less based on the total mass of the ink.

Abstract: A liquid storing container includes a case, a flexible member, a pressure receiving member, a first urging member, and a second urging member. The case constitutes a part of an inner wall of a liquid containing section configured to store liquid. The flexible member constitutes at least a part of a remaining inner wall of the liquid containing section. The pressure receiving member is arranged between the case and the flexible member. The first urging member is provided between the pressure receiving member and the case, and one end is connected to the pressure receiving member to urge the pressure receiving member from the case to the flexible member. The second urging member is provided between the pressure receiving member and the case, and one end is connected to the pressure receiving member to urge the pressure receiving member from the case to the flexible member.

Abstract: An ink supply valve device used in ink supply system, includes: a valve lid and a valve sleeve embedded into the valve lid; wherein the valve lid is provided with an elastic coupling, so that when it is pushed forward, there is a space formed between the valve lid and the valve sleeve; two sloping sealing faces are provided respectively around the top of the valve sleeve and on the inner wall of the top of the valve lid, which can cooperate with each other to seal the space formed between them.

Abstract: A liquid housing container in which a liquid to be supplied to a head can be stored may be attached to or detached from a holder, which is provided to a liquid ejecting device having the head for ejecting a liquid. The holder has a rotation point where the mounted liquid housing container may be rotated in a predetermined so as to be detached from the holder.

Abstract: The liquid housing container recycling method includes removing a second case member from a first case member, taking out a liquid housing body from inside of the first case member, forming on the liquid housing body an opening part that communicates with inside of a liquid housing unit, injecting into the inside of the liquid housing unit from the opening part that is formed liquid of a volume that is smaller than an initially housed volume when the liquid is initially injected and housed in the liquid housing unit of the liquid housing body in a state of being housed inside the case member, sealing the opening part of the liquid housing body, housing inside the first case member the liquid housing body for which the opening part is sealed, and attaching the second case member to the first case member.

Abstract: A liquid storage container includes a liquid storage section configured to store a liquid, a liquid injection section connected to the liquid storage section and configured to inject the liquid into the liquid storage section, an air chamber communicated with air, an air introduction section communicated to the air chamber and configured to introduce the air to the air chamber, a communicating passage through which the liquid storage section and the air chamber are communicated to each other, a liquid injection port defined as an intersection at which the liquid injection section and the liquid storage section intersect each other, and a connecting port defined between the liquid storage section and the communicating passage and located above the liquid injection port in a posture where the liquid injection port is oriented upward in a direction intersecting with a horizontal direction.

Abstract: A liquid ejecting apparatus includes: a mounting section that is capable of moving in a state of mounting a medium; a liquid ejecting section that is capable of ejecting a liquid onto the medium mounted on the mounting section; and an adapter that has an injecting section capable of injecting the liquid and an outlet section capable of flowing the liquid out to the liquid ejecting section, in which the injecting section of the adapter is disposed below the mounting section in a vertical direction.

Abstract: Ink and coating compositions, printing and coating processes, and printed and coated substrates utilizing a polymerizable composition comprising one or more di-activated vinyl compounds, with the proviso that said a di-activated vinyl compound is not a cyanoacrylate. Exemplary compositions include methylene malonates, methylene ?-ketoesters, methylene ?-diketones, dialkyl disubstituted vinyls, and dihaloalkyl disubstituted vinyls. Exemplary compositions are polymerizable at ambient temperatures.

Abstract: An ink storing container (liquid storing container) includes a memory device configured to store electronic data, an ink containing body (liquid containing body) configured to contain ink, an inner lid configured to cover an ink inlet and outlet formed in the ink containing body, and an outer lid configured to cover the ink inlet and outlet from outside of the inner lid. The memory device is configured to be stored in a storage space formed between the inner lid and the outer lid. Accordingly, without any special additional work to the ink containing body, the memory device can be held by the ink containing body. Also, the memory device is easily removed from the storage space by opening the outer lid.

Abstract: A liquid container detachably mounted on a liquid consuming apparatus includes: a liquid including dispersed particles and a solvent in which the dispersed particles are dispersed; and an accommodation bag accommodating the liquid and provided with a discharge portion discharging the liquid, in which a ratio of a volume of the liquid with respect to a capacity of the accommodation bag when the accommodation bag is used from an initial period of filling is 95% or less.

Abstract: A recording apparatus includes: a first housing; a second housing pivotable about a shaft relative to the first housing between a close position and a distant position; and a tank mount portion provided in the second housing such that a mounting direction of a tank with respect to the tank mount portion in a state in which the second housing is at the distant position has a downward component in a vertical direction. The tank mount portion includes a resistance applying mechanism which applies a resistance force to the tank in a state in which at least a part of the tank is inserted into the tank mount portion when the second housing is at the distant position.

Abstract: An adapter is mountable to a liquid consumption apparatus to connect an external source of liquid to the liquid consumption apparatus. The liquid consumption apparatus includes a liquid intake portion for taking liquid into the liquid consumption apparatus and a liquid catcher for catching inadvertently spilled or sprayed liquid, the liquid catcher being provided below the liquid intake portion. The adapter includes a liquid supply portion and an accommodation portion. The liquid supply portion is configured to connect to the liquid intake portion to supply the liquid from the external source to the liquid intake portion. The accommodation portion is located below the liquid supply portion. In a state where the adapter is attached to the liquid consumption apparatus, the accommodation portion accommodates at least a part of the liquid catcher.

Abstract: A photopolymerizable composition contains diethylene glycol dimethacrylate, b1, b2, and b3, wherein the content of b2 is less than 2.5% by weight, the content of b3 is less than 3% by weight. b1 is 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propane-1-on, b2 is 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)benzyl]phenyl}-2-methyl-1-propane-1-on, and b3 is oligo{2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone}.

Abstract: There is provided an ink cartridge which is formed from an ink-filled ink pack and a hermetic outer shell case for housing the ink pack and which supplies ink to a recording head by means of application of air pressure to a space between the outer shell case and the ink pack. The outer shell case is formed by coupling an upper case and a lower case together. The ink-filled ink pack is housed in the lower case, and the upper case is laid on the lower case from above. The upper and lower cases are hermetically sealed by vibratory welding or heat welding, thus constituting the ink cartridge.

Abstract: An integrated multifunctional valve device includes a surface member having a first port and a second port formed therein, a flexible disk member having a central portion and a surrounding portion, a first seat member extending outward from the surface member and coupled to the surrounding portion of the flexible disk member, a second seat member extending outward from the surface member and surrounded by the first seat member. The central portion is movable between an open port position to establish fluid communication between the respective ports and a close port position to stop the fluid communication between the respective ports. The second seat member is configured to selectively receive the central portion of the flexible disk member corresponding to the close port position. The integrated multifunctional valve device also includes an actuator member configured to selectively move the central portion of the flexible disk member into the open port position and the close port position.

Abstract: A liquid ejection apparatus including: a liquid ejection head including an inside channel; a supply channel; a return channel; a supply device; an adjusting device; and a controller, wherein the controller starts a liquid circulation control for circulating liquid through the supply channel, the inside channel, and the return channel in order by controlling: the adjusting device such that a channel resistance value of the return channel is less than a predetermined maximum value; and the supply device to supply the liquid into the inside channel, wherein, when the liquid is circulated, the controller starts a liquid discharge control for discharging the liquid by increasing the channel resistance value, wherein, when the liquid is discharged, the controller starts a liquid-discharge stopping control for stopping the discharge by decreasing the channel resistance value, and wherein the controller controls the supply device such that a liquid amount supplied to the inside channel per unit time when the discharg

Abstract: A recording apparatus includes a recording head capable of ejecting ink to a sheet; a sheet cassette that holds the sheet; a transport unit that transports the sheet to the recording head; a chassis which contains the recording head and the transport unit and into which the sheet cassette is inserted; an insertion port which is formed in a side surface of the chassis and through which the sheet cassette is inserted; an ink container that contains the ink; a case which is mounted on at least one side surface adjacent to the side surface in which the insertion port of the chassis is formed and accommodates the ink container; and a supply unit (connection tube) that supplies the ink from the ink container to an inside of the chassis. A guard portion with higher rigidity than the case is formed on a lower side of the case.

Abstract: This invention is a manufacturing method of a liquid discharge head that includes a substrate having a plurality of discharge energy generating elements that generate energy that is utilized for discharging a liquid, and a discharge port forming member that constitutes a discharge port group including a plurality of discharge ports that discharge the liquid and flow paths that communicate with the discharge port group. The manufacturing method includes (1) disposing a photosensitive resin as material of the discharge port forming member on or above the substrate, and (2) forming an exposure pattern of the discharge port group using ultraviolet light in the photosensitive resin. In the aforementioned (2), the discharge port group is divided in a longitudinal direction and exposed, and the exposures are respectively performed so that regions in which there is a high degree of telecentricity face each other.