Matsushita Electric Industrial Co., Ltd.

Kyushu University

Takumi Inoue

Hideaki Horio

Yutaka Miyazono

Mitsuhide Matsuda

Kazumi Ohtsubo

Provided herein is a non-destructive testing method capable of diagnosing a condition of an object to be tested using a single-pulse ultrasonic wave signal. An attenuation waveform of the single-pulse ultrasonic wave signal received by a receiving sectionis wavelet transformed by a wavelet transform sectionto obtain an envelope line A(t) and a phase &#x3c6;(t) of the attenuation waveform. A temporal change computing sectionapproximates the attenuation waveform by an approximation equation available for computation, using the envelope line A(t) and the phase &#x3c6;(t) of the attenuation waveform inputted from the wavelet transform section, and obtains the temporal change of instantaneous frequency of the attenuation waveform. A diagnosing sectiondiagnoses a condition of the object to be tested, based on the temporal change of the instantaneous frequency computed by the temporal change computing section

Method and system for non-destructive testing

A thin type ink jet cartridge consists of a passageway for holding ink, a thin type ink holder made of transparent material for accommodating the passageway, a graded scale put on the thin type of ink holder to quantitatively check the volume of the ink held in the passageway, ribs for structurally reinforcing the thin type ink holder, nozzles for discharging the ink held in the passageway at a recording paper, a shutter for covering the shutter when the ink is not discharged from the nozzles, a protecting plate for protecting the recording paper from contact with the nozzles by surrounding the nozzles positioned at a concave portion surrounded by the protecting plate.

Thin type of ink jet cartridge

A method for manufacturing an ink jet head which involves the steps of casting a first synthetic film on a metal film, etching the conductive metal to produce a pair of etched electrodes facing each other across an opening according to lithography and etching techniques, casting a second synthetic resin film being transparent on the etched electrodes and the first synthetic resin film, ablating both the first and second synthetic resin films with an excimer laser without damaging the electrodes to form both an expelling nozzle which penetrates the second synthetic resin film and an ink passageway which penetrates the first synthetic resin film through the opening, attaching an ink holding cap to the first synthetic resin film to hold conductive ink in a hollow portion thereof, and electrically connecting the etched electrodes with a voltage generator through electrical leads for applying a voltage generated in the voltage generator to the etched electrodes, wherein the etched electrodes project into the expelling nozzle. The conductive ink held in the ink holding cap is expelled from the nozzle through the ink passageway upon vaporization.

Growing community of inventors

Fukuoka, Japan

Takumi Inoue