摘要:
A ferroelectric element is described which has a structure including a common electrode 11, a ferroelectric film 10 formed on the common electrode 11, an individual electrode 3 formed on the ferroelectric film 10, a lead wire 15 for feeding electric power to the individual electrode 3, which is formed on the same plane as of the individual electrode 3, and a protection film 16 entirely covering the exposed parts of the ferroelectric film 10 and the individual electrode 3, and covering the lead wire 15. The protection film 16 is preferably made of a material whose Young's modulus is smaller than that of the ferroelectric film 10, exactly 1/20 or smaller of the Young's modulus of the ferroelectric film 10. Further, the ferroelectric film is formed with the insulation reinforcing film containing at least one of the elements constituting the ferroelectric film.
摘要:
In order to maintain ink supply pressure to a recording head constant while supplying the recording head with ink with an minimum of air entrained therein, the invention provides an ink supplier which comprises a main ink reservoir, a subsidiary ink reservoir connected to the main ink reservoir for replenishment with ink from the main ink reservoir and a means whereby a position head of the ink liquid level in the subsidiary ink reservoir is maintained substantially constant relative to a printing head face of the recording head. Included preferably also are a deaerator associated with the subsidiary ink reservoir for removing air from ink therein and a float floating on ink in the subsidiary ink reservoir. Further, in order for a mechanism that adjusts the position head for ink supply to the recording head to be made light equipped and manufactured at reduced cost, the invention provides an ink supplier that comprises a back pressure reservoir connected between the main ink reservoir and the recording head and adapted to maintain a height of the ink liquid level therein substantially constant against an amount of ink consumption by the recording head and a means for adjusting the back pressure reservoir in its vertical position, thereby adjusting a position head of the ink liquid level in the back pressure reservoir relative to a printing head face of the recording head.
摘要:
Plural nozzle arrays of which each comprises plural nozzle holes (247a) from which ink is ejected are arranged slantingly in a main scanning direction. A distance between a first arbitrary nozzle hole (247a-1) and a second nozzle hole (247a-2), in a nozzle array adjacent to the array to which this first nozzle hole (247a-1) belongs, which is adjacent to the first nozzle hole (247a-1), and a distance between the first nozzle hole (247a-1) and a third nozzle hole (247a-3), in the nozzle array to which the second nozzle hole (247a-2) belongs, which is further adjacent to the first nozzle hole (247a-1) are different from each other.
摘要:
An ink jet recording apparatus, which performs printing by ink ejection, comprises a pressure chamber in which ink liquid is filled; a nozzle hole 116 which is formed communicating with the pressure chamber; a piezoelectric element 113 which is formed on the pressure chamber, and deforms the pressure chamber by mechanical expansion and contraction, whereby pressure is generated in the pressure chamber and ink is ejected from the nozzle hole 116; and a dew point control unit 123 which keeps a dew point in an atmosphere of the piezoelectric element 113 and the vicinity of the piezoelectric element 113 at a lower value than a dew point in an environment where the ink jet recording apparatus is set. The dew point control unit 123 comprises a compressor 123a, and an air drier 123b which dries compression gas from this compressor 123a and feeds it to the piezoelectric element 113.
摘要:
An ink jet head unit including a head (2) in which a plurality of nozzle arrays (2a, 2b, 2c, 2d) are formed. Each of the nozzle arrays has a number of nozzle holes, and ink can be ejected from the nozzle holes. The head (2) is mounted on the head base, and flat cables (4a, 4b) are connected at one end to mounting parts (7a, 7b), which are interposed between a first pair of the nozzle arrays (2a, 2b) and a second pair of the nozzle arrays (2c, 2d). The flat cables are flexibly formed by covering transmission wires with an insulation film. The flat cables are connected to the head to transmit ink ejection signals for driving the head.
摘要:
An ink supplier for an ink jet recorder is provided. The ink supplier includes a recording head, a main ink reservoir, and a subsidiary ink reservoir connected to the main ink reservoir for replenishment with ink from the main ink reservoir. A position head of the ink liquid level in the subsidiary ink reservoir is maintained substantially constant relative to a printing head face of the recording head.
摘要:
An ink jet recording apparatus, which performs printing by ink ejection, includes a pressure chamber in which ink liquid is filled; a nozzle hole (116) which is formed so as to communicate with the pressure chamber; a piezoelectric element (113) which is formed on the pressure chamber, and deforms the pressure chamber by mechanical expansion and contraction, whereby pressure is generated in the pressure chamber and ink is ejected from the nozzle hole (116); and a dew point control unit (123) which maintains a dew point in an atmosphere of the piezoelectric element (113) and the vicinity of the piezoelectric element at a lower value than a dew point in an environment where the ink jet recording apparatus is set. The dew point control unit (123) includes a compressor (123a), and an air drier (123b) which dries compression gas from the compressor (123a) and feeds it to the piezoelectric element.
摘要:
An ink jet head unit comprises a head 2 in which plural nozzle arrays 2a, 2b, 2c, 3d of which each comprises many nozzle holes are formed, and ink is ejected from the nozzle holes; a head base on which the head 2 is mounted; and flat cables 4a, 4b flexibly formed by covering many transmission wires with an insulation film, of which one end sides where the transmission wires are exposed are fixed, in mounted parts 7a, 7b interposed between the nozzle arrays 2a, 2b and the nozzle arrays 2c, 2d, onto the head 2 thereby to transmit ink ejection signals for driving the head 2.