Fuji Xerox Co., Ltd.

Takashi Yagi

Shinji Seto

Tadashi Suzuki

Torahiko Kanda

Hiroyuki Usami

A drive waveform generation device includes a generation unit that generates a drive waveform having, as each cycle, a first waveform for droplet ejection or a second waveform for vibrating a liquid meniscus by selecting from a first period having a first potential that is lower than a reference potential, a second period following the first period continuously and having a second potential that is higher than or equal to the reference potential, a third period following the second period continuously and having a third potential that is higher than the first potential and lower than the second potential, and a fourth period following the third period continuously and having a fourth potential that is higher than the first potential and lower than the third potential, the first period, the second period, the third period and the fourth period being included in a fundamental waveform as defined herein.

Drive waveform generation device and image forming apparatus

A droplet jetting apparatus includes: a droplet jetting head that is supplied with a jetting liquid and jets out droplets of the jetting liquid from nozzles formed in a nozzle surface; a spray device that sprays maintenance liquid on the nozzle surface; and a maintenance liquid temperature control unit that controls a temperature of the maintenance liquid so that the temperature of the maintenance liquid comes closer to or becomes higher than or equal to a temperature of the droplet jetting head.

Droplet jetting apparatus and maintenance method of droplet jetting head

A piezoelectric element substrate is provided with a support substrate, an insulating orientation auxiliary layer formed on the support substrate, a lower electrode layer formed on the orientation auxiliary layer so that an uncoated portion where the orientation auxiliary layer is not coated with the lower electrode layer is constituted at least a portion thereof, a piezoelectric substance layer formed on the lower electrode layer and the uncoated portion of the orientation auxiliary layer, and an upper electrode layer formed on the piezoelectric substance layer, wherein the orientation auxiliary layer and the piezoelectric substance layer comprise a material of the same crystal system.

Piezoelectric element substrate, liquid droplet ejecting head, liquid droplet ejecting device, and piezoelectric element substrate manufacturing method

A metal oxide layer is disposed on the lower potential side when an electric field in a predetermined direction is applied to the piezoelectric body which is deformed by an applied electric field, and compensates for the oxygen vacancies which are generated in the piezoelectric body by applying the electric field. A second metal oxide layer is disposed on the higher potential side of the electric field applied to the piezoelectric body, and by applying an electric field in the direction reverse to the electric field, compensates for the oxygen vacancies which are accumulated in the piezoelectric body, thus degradation of the piezoelectric characteristic of a piezoelectric element can be repaired.

Piezoelectric element, liquid droplet ejection head, and liquid droplet ejection apparatus

A structure of the present invention includes a base plate and a formation unit. The formation unit is bonded and fixed to and retained on the base plate by a first adhesive. The first adhesive is disposed at least in the vicinities of end portions of a peripheral edge of a bonding surface of the formation unit.

Structure and liquid droplet discharge apparatus

A liquid droplet ejecting head bar comprising: multiple liquid droplet ejecting head units that eject liquid droplets from nozzles; a long substrate on which the plurality of liquid droplet ejecting head units are arranged; and spacer components to which the liquid droplet ejecting head units are joined and fixed and which are attached to the long substrate so as to be removable.

Liquid droplet ejecting head bar, liquid droplet ejecting device, and liquid droplet ejecting head bar manufacturing method

A recording device has a recording section which records an image on a recording medium which is conveyed. A recording region of the recording section is greater than or equal to a width of a recording medium of a maximum width which can be recorded. When recording a recording medium of a width which is narrower than the maximum width which can be recorded, relative positions of the recording section and the recording medium can be changed in a direction orthogonal to a conveying direction of the recording medium. The relative positions may be changed by changing a position of the recording medium in the direction orthogonal to the conveying direction.

Recording device and recording method

The present invention provides a piezoelectric element at least including a piezoelectric layer, a first higher-potential electrode layer formed in contact with the piezoelectric layer on one face of the piezoelectric layer, and a second lower-potential electrode layer formed in contact with the piezoelectric layer on the face of the piezoelectric layer opposite to the first electrode layer, wherein the first electrode layer contains a metal A having a standard electrode potential of higher than 0 V and a metal B having a standard electrode potential higher than that of the metal A in which the metal A is present in the largest amount by weight of the total amount of the metal elements contained in the first electrode layer, the second electrode layer contains a metal C having a standard electrode potential lower than that of the metal A, in which the metal C is present in the largest amount by weight of the total amount of the metal elements contained in the second electrode layer.

Piezoelectric element, droplet-ejecting head, and droplet-ejecting apparatus

A piezoelectric device includes a piezoelectric body layer, a first electrode layer at one face side of the piezoelectric body layer, and a second electrode layer at a side of a face of the same that is opposite to the side at which the first electrode layer is disposed. Higher potentials are applied to the first electrode layer and lower potentials are applied to the second electrode layer. The piezoelectric device features a metallic layer disposed in contact with a piezoelectric body layer surface at the side at which the first electrode layer is provided, and a metal oxide layer disposed in contact with a piezoelectric body layer surface at the side at which the second electrode layer is provided. The metallic layer is formed of a metallic material with a standard electrode potential greater than 0 V, and the metal oxide layer is formed of a metal oxide.

Piezoelectric device, liquid droplet discharging head using the device, and liquid droplet discharging apparatus using the head

The present invention provides inspection of a liquid ejection head which is equipped with plural nozzles at which piezoelectric elements are provided and which ejects recording liquid droplets from the individual nozzles in accordance with application of a driving signal voltage to the individual piezoelectric elements. A first voltage is applied to each individual piezoelectric element for measuring a resonance frequency of the individual piezoelectric element, a second voltage which is higher than the first voltage is applied to the individual piezoelectric element for measuring a resonance frequency of the individual piezoelectric element, and on the basis of the resonance frequencies at the times of application of the first voltage and the resonance frequencies at the times of application of the second voltage, piezoelectric elements that are likely to be susceptible to failure over time are detected.

Growing community of inventors

Kanagawa, Japan

Takashi Yagi