Seiko Epson Corporation

Kinya Ozawa

Tsuyoshi Maeda

Nobutaka Urano

Kimitaka Kamijo

Osamu Okumura

Toshiharu Matsushima

Eiji Okamoto

Takumi Seki

Hirotaka Kawata

Junhua Zhang

Shushi Makita

Hiromu Miyazawa

Chiyoaki Iijima

Masakatsu Higa

Hitotoshi Kimura

Ryoichi Tanaka

Jiro Kato

Hitoshi Tsuchiya

Shigeki Suzuki

Koji Harada

Shinichi Itaya

Ryosuke Tsuchihashi

Takayuki Yokoyama

Tsuyoshi Okazaki

Shinri Sakai

Kazuhiko Hara

Hiroyuki Kuramoto

Ryo Ishii

Hayato Takahashi

Maki Nariai

Hideo Shimamura

Naoki Yonekubo

Koji Takano

Taishi Okita

Naoki Takatsu

Oshi Iwakami

A liquid ejecting head includes a nozzle that is in communication with a pressure chamber and ejects a first liquid, a passage formation substrate that has a liquid passage which extends from a common liquid chamber in communication with a plurality of pressure chambers to the nozzle and through which the first liquid flows, and a circulation passage that is formed in the passage formation substrate, passes near the nozzle, and is not in communication with the liquid passage, and through which a second liquid circulates.

Liquid ejecting head and liquid ejecting apparatus

In a method of controlling a liquid ejecting apparatus, where the liquid ejecting apparatus includes a pressure chamber that communicates with a nozzle that ejects a liquid, a drive element that changes a pressure of the liquid in the pressure chamber, and a drive circuit that supplies the drive element with an ejection pulse that generates a change in the pressure that ejects the liquid from the nozzle, the method includes specifying a viscosity of the liquid in the nozzle and a surface tension of the liquid in the nozzle from a residual vibration when the pressure of the liquid in the pressure chamber is changed, and controlling a waveform of the ejection pulse according to the viscosity and the surface tension.

Liquid ejecting apparatus control method and liquid ejecting apparatus

In a motor including an armature, and a field system having a main pole magnetized in first directions in which a distance from the armature is defined and a sub-pole adjacent to the main pole in second directions orthogonal to the first directions and magnetized in the second directions and forming a Halbach array, a first dimension of the main pole in the second directions, a second dimension of the main pole and the sub-pole in the first directions, and a third dimension as a sum of the dimensions of the main pole and the sub-pole in the second directions are determined according to a flux content generated in a surface of the field system at the armature side.

Motor for improving flux content and robot comprising the same

A droplet discharge apparatus includes a first head, a first-ink pack storing first ink, a second head, a second ink pack storing second ink, a cleaning liquid container storing cleaning liquid, a common flow path system, a cleaning liquid flow path, a first pump feeding the first ink from the first ink pack to the second ink pack through the common flow path system, a second pump feeding the cleaning liquid from the cleaning liquid container to the first ink pack through the cleaning liquid flow path and the common flow path system, a first valve controlling a liquid flow rate between the common flow path system and the first ink pack, a second valve controlling a liquid flow rate between the common flow path system and the second ink pack, a third valve controlling a liquid flow rate between the common flow path system and the cleaning liquid flow path, and a control unit, wherein the common flow path system, the first valve, and the second valve are located higher than a liquid surface in the first ink pack and a liquid surface in the second ink pack, and wherein the control unit transfers the first ink from the first ink pack to the second ink pack, and transfers the cleaning liquid from the cleaning liquid container to the first ink pack.

Droplet discharge apparatus

A droplet-discharge-apparatus includes a first-head, a first-ink-container storing first-ink, a second-head, a second-ink-container storing second-ink, a cleaning-liquid-container storing cleaning-liquid, a common-flow-path-system, a cleaning-liquid-flow-path, a first-pomp feeding the first-ink from the first-ink-container to the second-ink-container through the common-flow-path-system, a second-pomp feeding the cleaning-liquid from the cleaning-liquid-container to the first-ink-container through the cleaning-liquid-flow-path and the common-flow-path-system, a first-valve controlling a liquid flow rate between the common-flow-path-system and the first-ink-container, a second-valve controlling a liquid flow rate between the common-flow-path-system and the second-ink-container, a third-valve controlling a liquid flow rate between the common-flow-path-system and the cleaning-liquid-flow-path, and a control-unit. The control-unit transfers the first-ink from the first-ink-container to the second-ink-container by controlling the first-valve, the second-valve, the third-valve, and the first-pomp, and transfers the cleaning-liquid from the cleaning-liquid-container to the first-ink-container by controlling the first-valve, the second-valve, the third-valve, and the second-pomp.

A liquid droplet ejecting apparatus includes a nozzle; a flow-path-section having a first pressure-chamber, a communication-path enabling the nozzle to communicate with the first pressure-chamber, and a second pressure-chamber communicating with the first pressure-chamber through the communication-path; a first signal-generator that generates a first driving signal to drive a first piezoelectric-element; a second signal-generator that generates a second driving signal to drive a second piezoelectric-element; and an inspector that inspects ejection from the nozzle based on electromotive force generated by the first piezoelectric-element due to residual vibration that has occurred in the flow-path-section due to the driving of the first piezoelectric-element. The first driving signal includes a first inspection waveform. The second driving signal includes a second inspection waveform having a polarity opposite to the first inspection waveform for a time period overlapping a first formation time period for the first inspection waveform.

Liquid droplet ejecting apparatus and liquid droplet ejecting head

A method of cleaning a liquid discharging apparatus has a second flow path cleaning step of causing a cleaning liquid to pass through a second flow path so that the second flow path is cleaned, and also includes a first flow path cleaning step of causing the cleaning liquid that has passed through the second flow path to pass through a first flow path so that the first flow path is cleaned.

Method of cleaning liquid discharging apparatus

A liquid ejecting head includes: a nozzle that has a nozzle opening from which liquid is ejected; a pressure compartment that is in communication with the nozzle; a drive element configured to vary pressure of the liquid inside the pressure compartment for ejecting the liquid from the nozzle opening; and a control element configured to apply energy to the liquid in a flow passage from the pressure compartment to the nozzle opening.

Liquid ejecting head, liquid ejecting apparatus, method for controlling the same

There is provided a recording apparatus including an apparatus main body including a recording head that ejects liquid from a nozzle opening formed in a nozzle plate, and an upstream electrode portion and a downstream electrode portion that are disposed on an upstream side and a downstream side in a transporting direction of the medium to sandwich the position facing the nozzle plate therebetween, in which the upstream electrode portion and the downstream electrode portion are configured such that an electric field is formed between the upstream electrode portion and the downstream electrode portion as voltages are applied.

Recording apparatus

A liquid ejecting head has a nozzle forming surface to which a nozzle section through which liquid is ejected is open, wherein an electrostatic propensity of the nozzle section due to contact with the liquid is lower than an electrostatic propensity of the nozzle forming surface due to contact with the liquid. The amount of fluorine per unit area in the nozzle section is smaller than the amount of fluorine per unit area in the nozzle forming surface.

Liquid ejecting head having nozzle with electrostatic propensity

A liquid ejecting apparatus includes a liquid ejecting portion which has a nozzle that ejects liquid, and a flushing receptive body which receives the liquid that is ejected in a flushing operation in which the liquid is ejected from the nozzle, the flushing receptive body including a receiving member that is able to receive the liquid, a receiving member holding portion which holds the receiving member, and a fixing member with conductivity that fixes the receiving member to the receiving member holding portion by contacting the receiving member and has a mesh form portion that forms an adhesion surface to which the ejected liquid is adhered with the receiving member in the flushing operation, in which the fixing member is electrically grounded.

Liquid ejecting apparatus with flushing receptive body for receiving liquid during maintenance operation

A liquid ejecting head includes a nozzle face on which nozzles which eject liquid onto a medium are formed; a first region with a liquid repelling property which is connected to a peripheral edge of the nozzle when planarly viewed; and a second region with a liquid repelling property lower than that in the first region, which is connected to a peripheral edge of the nozzle when planarly viewed.

Disclosed is a liquid ejecting apparatus, and a method of controlling the liquid ejecting apparatus, whereby at a timing at which temperature detection and ejection pulse change are subsequently performed, a frequency of execution of temperature detection and driving pulse change differs according to whether temperature detected by the temperature sensor is in a first temperature range in which a degree of change in viscosity of ink for change in temperature is relatively high or in a second temperature range in which the degree of the change in viscosity for the change in temperature is relative stable. More specifically, in the first temperature range, the frequency of execution of temperature detection and driving pulse change is high compared to the second temperature range.

Growing community of inventors

Shiojiri, Japan

Kinya Ozawa