Toshiba Tec Kabushiki Kaisha

Riso Technologies Corporation

Yasuhito Kiji

Nobuo Murofushi

Yasuo Matsumoto

Kouichi Sano

Shigetoshi Kunieda

Ryutaro Kusunoki

Takahiro Shimura

According to one embodiment, a liquid ejection head includes a nozzle plate, pressure chambers, actuators, and a drive circuit. The nozzle plate includes nozzles for ejecting liquid. The pressure chamber communicates with the nozzles. The actuator varies the volume of the pressure chamber according to a drive signal. The drive circuit generates the drive signal for driving the actuator. The ejection waveform in the drive signal includes an expansion potential difference changes that changes in stages and a contraction potential difference change that changes in stages. The drive circuit sets the timing of the stages to cancel the vibration of an acoustic resonance frequency in a frequency range higher than a main acoustic resonance frequency of the liquid in the pressure chamber.

Liquid ejection head

An ink jet head includes a pressure chamber, an actuator, and an application unit. The chamber accommodates liquid. The actuator changes a volume of the chamber with a drive signal to be applied. The unit apply s the signal to the actuator. The signal includes a discharge pulse and a vibration pulse. The discharge pulse causes liquid to be discharged from a nozzle. A second discharge pulse is applied after a first discharge pulse. The vibration pulse is applied before the discharge pulse, has a potential having a polarity opposite to that of the discharge pulse. A period of the discharge pulse is 1.5 times to 2.5 times a half-period of a main acoustic resonance frequency of liquid in the chamber. A pulse width of the first pulse is closer to the half-period of the main acoustic resonance frequency than a pulse width of the second pulse.

Ink jet head and ink jet recording apparatus

An inkjet head comprises a pressure chamber that stores liquid; an actuator that changes a volume of the pressure chamber in response to an applied driving signal; and an applying section that applies the driving signal to the actuator. The driving signal includes a discharge pulse and an oscillation pulse. The discharge pulse enables liquid to be discharged from a nozzle communicating with the pressure chamber. The oscillation pulse is applied before the discharge pulse and has a potential opposite in polarity to that of the discharge pulse to generate pressure oscillation for promoting discharge of the liquid in the liquid. When the driving signal includes two or more successive discharge pulses, a cycle of the discharge pulse is 1.5 times or more and 2.5 times or less as long as a half cycle of a main acoustic resonance frequency of the liquid in the pressure chamber.

Inkjet head and inkjet recording apparatus

An inkjet head drive apparatus comprises a pressure chamber, an actuator, a nozzle and a drive signal output section. The pressure chamber accommodates an ink. The actuator increases or decreases volume of the pressure chamber through an applied a voltage. The nozzle is connected with the pressure chamber to eject the ink through the change in the volume of the pressure chamber. When an ejection pulse for the ejection of the ink from the nozzle is repeated for equal to or greater than three times, the drive signal output section outputs a drive signal having a driving waveform including an initial ejection pulse having a first voltage amplitude and the second ejection pulses and the pulses thereafter having a second voltage amplitude smaller than the first voltage amplitude to the actuator.

Inkjet head drive apparatus

An ink jet head drive device includes a pressure chamber in which a liquid can be contained, an actuator configured to change a pressure on the liquid in the pressure chamber by changing a volume of the pressure chamber in response to a drive signal, a nozzle through which the liquid contained in the pressure chamber can be ejected when an ejection pulse is supplied to the actuator, and a drive circuit configured to output the drive signal to the actuator as a drive waveform having a first pulse group and a second pulse group following the first pulse group when at least three consecutive ejection pulses are included in the drive waveform. All ejection pulses in the first pulse group have a first voltage amplitude, and all ejection pulses in the second pulse group have a second voltage amplitude that is smaller than the first voltage amplitude.

Ink jet head drive device

An inkjet head drive apparatus comprises a pressure chamber, an actuator, a nozzle and a drive signal output section. The pressure chamber accommodates an ink. The actuator increases or decreases volume of the pressure chamber through an applied a voltage. The nozzle is connected with the pressure chamber to eject the ink through the change in the volume of the pressure chamber. When an ejection pulse for the ejection of the ink from the nozzle is repeated for equal to or greater than three times, the drive signal output section outputs a drive signal having a driving waveform including an initial ejection pulse having a first voltage amplitude and the a second ejection pulses and the pulses thereafter having a second voltage amplitude smaller than the first voltage amplitude to the actuator.

A mount sheet having a plurality of radio tags attached at an interval to it is run over a radio communicating section. The radio communicating section has a metal member providing a conveying surface with a slit formed therein. A dielectric member is arranged on a lower surface of the metal member with a projecting section inserted into the slit and, by doing so, the top surface of the projecting section is set flush with the top surface of the metal member. An antenna of the radio communicating section is located beneath the projecting section of the dielectric member and this antenna is held within the metal case. When any radio tag being an object of a radio communication is located over the slit, the radio communicating section positively makes radio communication with the radio tag through the antenna.

Radio tag issuing apparatus and tag issuing method

There are provided a barcode reader for reading an article code in a barcode form from an article tag, and an RFID tag reader for reading a shelf code from a shelf tag in a non-contact wireless manner. The article code read by the barcode reader is stored in an article code memory, and the shelf code read by the RFID tag reader is stored in a shelf code memory. There are also provided an information processing unit, a control unit and a transmission unit. The information processing unit is controlled by the control unit to process the article code and the shelf code as one set of information for article management. Then, the transmission unit transmits the processed information to a personal computer.

Tag reading apparatus

Tag information which has been previously read but is not currently read is retrieved every time tag information is collectively read by a wireless tag reading device. When corresponding tag information is detected, sales information of a commodity is acquired from this tag information, and the acquired sales information is registered in a sales registering section. Further, display contents in a display device are changed in response to detection of the tag information which has been previously read but is not currently read. Furthermore, when information concerning a commodity for sale is input through a barcode reader, sales information of the commodity is acquired from this input information, and the acquired sales information is registered.

Commodity sales registration processing system and commodity information registering apparatus

Radio tag issuing apparatus

There is disclosed a commodity information registering apparatus which registers commodity information while a commodity is moved, comprising a radio tag reading section which reads a radio tag within a first field to acquire commodity identification information stored in the radio tag, an optical reading section which reads a code symbol within a second field to acquire commodity identification information described in the code symbol, and a registering section which registers one of the commodity information corresponding to the commodity identification information acquired from the radio tag and the commodity information corresponding to the commodity identification information acquired from the code symbol.

Commodity information registering apparatus and commodity information registering method

A composite antenna includes a first antenna structure and a second antenna structure integrally combined with the first antenna structure to operate under different frequency bands respectively that are used in different radio transmission systems such that the first antenna structure has a first conductive layer to operate under a first frequency band and the second antenna structure has a second conductive layer a thickness of which is thicker than that of the first conductive layer to operate under a second frequency band lower than the first frequency band.

Composite antenna

A label and RFID tag issuing apparatus comprises a recording apparatus that records information on a production label and an RFID tag reader/writer that writes and reads part of the recorded information to/from an RFID tag. This label and RFID tag issuing apparatus writes a production number to the RFID tag attached to the container if a container for containing an article or articles carrying the production label and RFID tag is judged to be on the container loading plate. The apparatus, subsequently confirming presence of the container on the container loading plate, records on the production label production information including bar-code data corresponding to the production number that has been written to the RFID. Thus, information recorded on the production label and information stored in the RFID tag are tied, and thereby accidental affixing of a wrong production label onto the container can be prevented.

Label and RFID tag issuing apparatus

A tag unit comprises two RFID tags arranged nearly parallel with each other, each RFID tag including an antenna, tag transmission/reception section, and storage section. The tag unit stores different serial numbers in the respective storage sections. A tag unit reading/writing apparatus writes the different serial numbers and common data in the storage sections of the respective RFID tags, and retains the same serial numbers of the respective RFID tags in its storage section 18. The tag unit reading/writing apparatus judges validity of reading and reusability of the tag unit, when it successfully reads both of the serial numbers and the data stored in the storage sections of the respective RFID tags.

Growing community of inventors

Mishima Shizuoka, Japan

Yasuhito Kiji