摘要:
A discharge opening plate (503) for an ink jet recording head comprises a plate (503) having a through hole forming a discharge opening, a water repellant cover layer (531) on one surface of the plate and an adhesive layer (533) provided on its other surface. An ink jet recording head may be manufactured by adhering this plate (503) to a head body (507) having an ink path arranged to correspond to the through hole opening.
摘要:
An ink jet head 10 has nozzle holes 4, emitting chamber 6 respectively connected thereto, and vibrating plates 5 are formed at the bottom wall of the emitting chambers 6. A common ink cavity 8 is adapted to supply ink to the emitting chambers through orifices 7. Electrodes 21 are placed so as to face the vibrating plates so as to drive the vibrating plates by static electricity. One of two anode bonding faces between the first substrate 1 forming the vibrating plate 5 and the second substrate 2 forming the electrode has a dent 15 to form a vibrating chamber 9 or a dent 25 for mounting an electrode therein, or SiO₂ membranes 41 and 42, respectively formed therein. The gap length G between the vibrating plate and the electrode is determined to be between 0.05 - 2µm.
摘要:
A heating device in a writing head of sandwich design consists of an additional layer applied to the top layer adjacent to the ink reservoir (9) and the ink duct (8), which forms a heating layer (11) and a temperature-sensing layer (12), each of which can be contacted from the exterior. The heating layer (11) in the region of the ink reservoir (9) possesses a structure with a large surface area, preferably in the form of a meander.
摘要:
To obtain a heating device for a laminated write head, a heating resistor (15) in the form of a heating meander is produced, in empty spaces present in the substrate, directly from one of the two electrically conductive thin films precipitated onto the basic oxide in order to form heat transducers (4) and strip conductors (5, 6). The empty spaces are obtained by ordered arrangement and grouping of the strip conductors (5, 6), in which sections of the heating resistor (15) are embedded. The heating resistor (15) is a component of a resistance bridge and functions both as a heat source and as a temperature sensor, by evaluation of its electrical resistance.
摘要:
A droplet ejecting device comprises a piezoelectric transducer consisting of first and second piezoelectric transducers (6, 7) polarized in the directions (56, 57) opposite to each other, the first and second piezoelectric transducers bonded to each other and having electrodes (26, 27) disposed at the inner and outer surfaces thereof. A member (36) is fitted to the piezoelectric transducer to define ink chambers, the member having an orifice (38) associated with each ink chamber. An ejection control means (28) applies an electric field to the electrode(s) associated with the predetermined ink chamber(s) so as to eject an ink droplet(s) (46) from the ink chamber(s) through the orifice(s) in a given position. As a result, the invention provides a droplet ejecting device where an ink ejecting cycle of the array as a whole is short, the print speed is high, and electrodes can be easily manufactured.
摘要:
A piezoelectric plate (2) polarized in the direction of its thickness and a base plate (1) having a rigidity lower than that of the piezoelectric plate (2) are joined together, a plurality of parallel grooves (3) are cut through the piezoelectric plate (2) into the base plate (1) so that the grooves (3) are separated from each other by side walls (4) each consisting of an upper side wall (4a) formed of a portion of the piezoelectric plate and a lower side wall (4b) formed of a portion of the base plate (1), a top plate (10) is attached to the upper surface of the piezoelectric plate (2) so as to close the upper open ends of the grooves (3), a nozzle plate (12) provided with a plurality of ink jets (11) is attached to one end of the assembly of the base plate (1), the piezoelectric plate (2) and the top plate (10) so that the ink jets (11) correspond respectively to the grooves (3) to form pressure chambers (14), and electrodes (8) are formed by depositing a metal over the bottom surfaces of the grooves (3) and the side surfaces of the side walls (4). In straining the side walls (4) by applying a voltage across the electrodes (8) to jet the ink through the ink jet (11), the resistance of the lower side walls (4b) against the deformation of the upper side walls (4a) is relatively small, so that the upper side walls (4a) can readily be strained greatly. The piezoelectric plate (2) is formed in an optimum thickness as a function of the reciprocal of the rigidity of the base plate (1), the elastic constant of the material forming the piezoelectric plate (2) and the height of the side walls (4).
摘要:
An ink jet printhead (10) for a drop-on-demand type ink jet printing system. The printhead includes a base section (12) having a series of generally parallel spaced projections (30) extending longitudinally therealong, a series of intermediate sections (32) conductively mounted on a top side of a corresponding one of the series of base section projections (30) and a top section (16) conductively mounted to a top side of each of the series of intermediate sections (32).
摘要:
A thermal ink jet printhead for ejecting and propelling ink droplets on demand is disclosed. The ink droplets (18) travel along a flight path from orifices (27) in the printhead toward a recording medium such as paper by momentarily heating the ink (60). The printhead includes at least one elongated channel that forms a straight ink flow path therethrough. The channel has an orifice (27) at one end and an inlet at the other end for communicating with an ink reservoir. A heating element (34) is disposed inside the channel and it has a surface that contacts the ink (60). A constrictor is placed in the channel near the orifice (27) so that the velocity of the ink flow through the orifice (27) is increased.