Dai Nippon Printing Co., Ltd.

Osada Research Institute, Ltd.

Sysmex Corporation

Keio University

National Cancer Center

Akira Kawai

Masaya Nakamura

Hajime Kubota

Daisuke Kubota

Seiji Kawahara

Tadashi Kondo

A method for producing decorative plates, comprising the steps of (i) providing a transfer printing sheet which comprises (a) a substrate film comprising a synthetic resin, (b) a releasing layer formed, optionally, on the substrate film, (c) a pattern layer formed on the substrate film or on the releasing layer if it is provided, and (d) an adhesive layer formed on the pattern layer, (ii) superposing the transfer printing sheet on a base sheet, (iii) hot-pressing the transfer printing sheet and the base sheet, (iv) peeling the substrate film off the transfer printing sheet thereby to transfer the pattern layer on the base sheet, (v) impregnating the base sheet with a thermosetting resin, and (vi) hot-pressing the resulting base sheet to harden the thermosetting resin to give a decorative plate.

Method for producing decorative plates

There is disclosed a device for detecting the position of an apical foramen of a tooth's root by measuring a change in the impedance between a measuring needle inserted into a tooth's root canal and an electrode abutting on oral mucosa. This device includes a circuit for generating two kinds of different frequency signals, detection circuits for detecting a change in the impedance in response to the respective frequencies and a 'difference' detection circuit for successively comparing outputs of the detection circuits and for producing a 'difference' signal, and a feed back circuit for feeding an output of the 'difference' detection circuit to one of the input terminals of the 'difference' detection circuit so as to equalize its two inputs by addition or by subtraction and thereby to make its output equal to zero. Furthermore, the device is provided with a means for announcing that the output of the 'difference' detection circuit is set to zero, and an indicating means for informing that the output of the 'difference' detection circuit has reached the specified value when the measuring needle is inserted further into the tooth' s root canal after the above-mentioned zero setting. The position of the apical foramen is considered to be the location of the measuring needle's tip when the output of the 'different' detection circuit reaches the specified value.

Apical foramen position detector for use in dental treatment

Growing community of inventors

Tokyo, Japan

Akira Kawai