Abstract: A problem is to solve problems on removal of solids by a screen and on an installation space and pipe connection in a separator. A solution to the problem is as follows. A separator 1, which is a device for separating solids contained in influent liquid, has a separation tank 2; a partition plate 5 partitioning an inside space of the separation tank 2 into an inflow chamber 3 and an outflow chamber 4; a screen 8 provided at the partition plate 5; a liquid inlet 6 formed at the inflow chamber 3; and a discharge outlet 7 formed at the outflow chamber 4; the inflow chamber 3 is provided with a guide unit 9, 10, 10a for forming a vertical swirling flow in the inflow chamber 3 by reversing the influent liquid from the liquid inlet 6; the screen 8 is disposed along a side face of the swirling flow thus formed. This configuration permits the solids to be removed, without clogging the screen with the solids.

Abstract: A problem is to solve problems on removal of solids by a screen and on an installation space and pipe connection in a separator. A solution to the problem is as follows. A separator 1, which is a device for separating solids contained in influent liquid, has a separation tank 2; a partition plate 5 partitioning an inside space of the separation tank 2 into an inflow chamber 3 and an outflow chamber 4; a screen 8 provided at the partition plate 5; a liquid inlet 6 formed at the inflow chamber 3; and a discharge outlet 7 formed at the outflow chamber 4; the inflow chamber 3 is provided with a guide unit 9, 10, 10a for forming a vertical swirling flow in the inflow chamber 3 by reversing the influent liquid from the liquid inlet 6; the screen 8 is disposed along a side face of the swirling flow thus formed. This configuration permits the solids to be removed, without clogging the screen with the solids.

Abstract: This invention relates to radio frequency identification (RFID) apparatus comprising a reader/writer and transponders (tags) such that 2 or more transponders are capable of operating simultaneously in the same field so that information in the form of data bits may be received from or sent to the tags without corruption.

Abstract: A first object of the present invention resides in providing a novel installation structure for an RFID tag, which effectively protects the RFID tag from external stress or impact during the storage, transportation and usage, and allows communication with the external. A second object of the present invention resides in that providing a novel installation structure for an RFID tag, which enables communication with the external even if the RFID tag is installed on a conductive member such as a metal member, and the surface thereof is covered with a protective member typically made of a metal which has an excellent strength and durability. A third object of the present invention is to provide a communication method using an RFID tag as being surrounded by a conductive member typically made of a metal.

Abstract: An object of the present invention is to allow a communication device which is based on a new principle by an electromagnetic induction method and an opening/closing system employing the communication device to be provided. The structure thereof is characterized in that at least an antenna coil 2 of a transmitting/receiving section 3 of the communication device 1 is protected by a metal layer 4 which is formed to have a thickness through which the communication device 1 can communicate with a data carrier 5 by an electromagnetic induction effect.

Abstract: This invention aims to provide a communication device, installation structure for the communication device, a method of manufacturing the communication device, and a method of communication with the communication device in which the communication device is able to exceedingly restain a conductive material from attenuating magnetic flux and to expand communication distance even when the communication device is attached to a conductive member e.g., metal, in a closely contacting manner. This invention has a sheet-like amorphous magnetic material being arranged in a manner extending from a magnetic flux generating portion of a concentric disk-shaped antenna coil of an RFID tag serving as the communication device to an outer area of the antenna coil.

Abstract: An RFID tag installing structure for installing a microminiaturized RFID tag having a cylindrical antenna coil to a conductive member, an RFID installing method, and communication method are disclosed. An RFID tag (1) having a cylindrical antenna coil (2) and shaped into a rod is characterized in that the axial direction of the RFID tag (1) is parallel to the installation surface composed of the bottom surface (7a) of an installation groove (7) made in a conductive member (5) and is in contact with the installation surface.