摘要:
A liquid discharge head includes an energy generating element which generates energy to be used to discharge a liquid; and a plurality of discharge ports which is formed for each energy generating element and allows the liquid to be discharged therethrough. The plurality of discharge ports have regions where the angles of contact with the liquid are different around the discharge ports, and the regions in the discharge ports where the contact angles are relatively small are formed at different positions in the plurality of discharge ports, and the liquids discharged from the plurality of discharge ports are discharged in directions away from each other.
摘要:
A method for manufacturing a liquid discharge head comprises the steps of providing a head main body having liquid flow paths, and an aperture surface having flow path openings communicated with the flow paths; providing a discharge port plate having extrusions each on the circumference of an inside opening communicated with each of the discharge ports, being on the inner face on the side opposite to the discharge port surface provided with discharge ports for discharging liquid, and a base having a substantially flat surface. For this method, the discharge port plate is arranged in a state of these surfaces formed integrally to be in contact; bonding the aperture surface and the inner face to fit the extrusions into the flow path openings by pressing the head main body and the base in the direction of the head main body and the base approaching each other with the discharge port plate between them; and separating the base from other members. With the method of manufacture thus structure, the liquid discharge head presents an excellent discharge efficiency by the provision of the extrusions that enter the flow paths from the orifice plate. It also becomes possible to manufacture a highly reliable liquid discharge head by a simpler manufacturing apparatus in a shorter period of time at lower costs.
摘要:
A substrate for liquid jet recording head including an electrothermal converting body comprising a heat generating resistor capable of generating thermal energy and a pair of wirings electrically connected to said heat generating resistor, characterized in that said substrate includes a base member constituted by a polycrystalline material such as a polycrystalline silicon material or the like, a process for producing this substrate, a liquid jet recording head in which said substrate, and a liquid jet recording apparatus in which said recording head is used.A desirable recording head which is free of a warpage or a curved portion and which provides a high quality recorded image can be produced by using said base member. Further, a desirable recording apparatus which enables to record a high quality image at a high recording speed. In the process of producing said substrate, the surface of the polycrystalline base member is thermally oxidized to provide a surface excelling in flatness.
摘要:
A substrate for liquid jet recording head including an electrothermal converting body comprising a heat generating resistor capable of generating thermal energy and a pair of wirings electrically connected to said heat generating resistor, characterized in that said substrate includes a base member constituted by a polycrystalline material and said polycrystalline base member has a thermal oxide layer formed by subjecting the surface of said polycrystalline base member to thermal oxidation treatment and thermally softening treatment. A process for producing said substrate, a liquid jet recording head in which said substrate is used, and a liquid jet recording apparatus in which said substrate is used. By using the above specific substrate, there can be provided a desirable elongated recording head which is free of a warpage or a curved portion at a reduced production cost.
摘要:
In an ink jet head manufacturing method wherein a plurality of substrates provided with ejection energy generating elements for generating energy for ejecting ink, are arranged on a supporting member, and a top plate is mounted on the substrate to cover all of the substrates to form ink flow paths, the improvement residing in that the supporting member is provided with recesses at a supporting portion for supporting the substrates, and an adhesive material is supplied into the recesses, and thereafter, the substrate is placed on the supporting member.
摘要:
It is an object of the present invention to ensure a desired precision in positioning an orifice plate with respect to liquid flow paths of a head main body, so as to prevent a failure liquid discharge which will possibly be caused due to a problem involved in a process of forming the orifice holes. In detail, a head main body is formed on the lower wall thereof a plurality of heating elements, has a plurality of liquid flow paths formed by dividing an internal space with a plurality of liquid flow path walls and arranged in parallel relationship with one another. On either side of the plurality of the liquid flow paths there are formed two dummy liquid flow paths. An orifice plate is formed with a plurality of orifice holes arranged in parallel with one another for discharging ink. Further, on either side of the plurality of the orifice holes there are formed two projected portions so shaped that they are capable of engaging with the opening ends of the dummy liquid flow paths. Each of the projected portions is formed with a dummy orifice hole which is not used for discharging ink during recording operation. A desired positioning can be effected by engaging the projected portions of the orifice plate with the dummy liquid flow paths.
摘要:
An ink jet head for discharging ink comprises a plurality of elemental substrates having a plurality of discharge energy generating elements arranged in line for discharging ink, a grooved member having a plurality of walls joined with the plurality of elemental substrates arranged to constitute ink paths for each of the discharge energy generating elements, these ink paths being formed by joining the walls of the grooved member under pressure with the plurality of elemental substrates thus arranged, and among the plurality of walls, a plurality of ribs formed on the bottom of each wall arranged on each boundary between elemental substrates, and configured along this boundary line to abut upon each of different elemental substrates, respectively. In this way, any gaps and steps existing between the elemental substrates are sealed by the ribs formed for the walls of the grooved member when this member is joined with the elemental substrates under pressure, thus preventing any ink leakage from such gaps or steps, and also, suppressing the pressure wave cross talk between ink paths in order to perform recording in good condition.
摘要:
A liquid discharge head includes an energy generating element which generates energy to be used to discharge a liquid; and a plurality of discharge ports which is formed for each energy generating element and allows the liquid to be discharged therethrough. The plurality of discharge ports have regions where the angles of contact with the liquid are different around the discharge ports, and the regions in the discharge ports where the contact angles are relatively small are formed at different positions in the plurality of discharge ports, and the liquids discharged from the plurality of discharge ports are discharged in directions away from each other.
摘要:
A method for producing a liquid discharge head provided with a head main body including plural energy generating elements for generating energy for discharging liquid as a flying liquid droplet, and plural liquid paths in which the energy generating elements are respectively provided, and an orifice plate adjoined to the head main body and provided with plural discharge ports respectively communicating with the liquid paths and plural independent projections formed around the discharge ports and respectively corresponding to the discharge ports so as to enter into the liquid paths and to engage therewith. The method includes steps of forming the plural projections and the discharge ports while a continuous resinous film is transported; separating the film in a continuous manner in a predetermined size including the portion on which the discharge ports are formed, thereby preparing the orifice plate; and adjoining the orifice plate to the head main body.
摘要:
In a liquid discharge head having an orifice plate in which a plurality of discharge ports for discharging liquid droplets therethrough are arranged, and a head body provided with a plurality of flow paths communicating with the plurality of discharge ports, a liquid chamber for supplying liquid to the plurality of flow paths, and a plurality of energy generation elements disposed correspondingly to the plurality of flow paths and generating energy for discharging the liquid droplets, the orifice plate being joined to the joined surface of the head body in which the communication ports of the flow paths communicating with the discharge ports are disposed, the orifice plate is formed with wall-shaped convex portions protruding from the inner peripheral portions of the discharge ports and having at least a portion thereof entering from the communication ports into the flow paths, and the width of the wall-shaped convex portions is greater in the portions thereof parallel to the row direction in which the plurality of discharge ports are arranged than in the portions thereof orthogonal to the row direction.