Abstract: A screw type dewatering machine according to the present invention includes inner and outer sleeves (1, 2), an annular space chamber (3) defined therebetween, a coil-like screw (4) rotatably disposed in the annular space chamber (3), and drain screens (5, 12) disposed on the inner sleeve (1) and/or the outer sleeve (2), and is characterized in that a support ring (16) is attached to the outer periphery of one end of the coil-like screw (4) and is rotatably supported by the outer sleeve (2).

Abstract: A screw type dewatering machine according to the present invention includes inner and outer sleeves (1, 2), an annular space chamber (3) defined therebetween, a coil-like screw (4) rotatably disposed in the annular space chamber (3), and drain screens (5, 12) disposed on the inner sleeve (1) and/or the outer sleeve (2), and is characterized in thata support ring (16) is attached to the outer periphery of one end of the coil-like screw (4) and is rotatably supported by the outer sleeve (2).

Abstract: Optical information recording medium that has resistance to scratching, resistance to friction static electricity, rapid discharging, resistance to dust adhesion on surface, thus having high reliability. The optical information recording medium has one or more substrates and one or more recording layers, and, respectively, one or more hardening coats and one or more antistatic coats provided on one or two sides of the optical information recording medium.

Abstract: An optical information recording medium, comprising a substrate and a recording layer, the recording layer containing a metal complex of a monoazo compound of the formula: ##STR1## wherein X is a residue which, taken together with the adjacent nitrogen atom and carbon atom, forms a heterocyclic ring; Y is a residue which, taken together with the two adjacent carbon atoms, forms an aromatic ring; and Z is hydroxy or carboxy.

Abstract: A shield tunneling machine having incorporated therein an earth removing apparatus which comprises a tubular casing having an earth inlet at one end and a closable earth outlet at the other end, and an earth transport conveyor rotatably provided within the casing and comprising a helically twisted strip. Unlike conventional earth removing apparatus which has a screw conveyor comprising a rotary shaft and a screw blade around the shaft, the apparatus can transport and discharge earth containing large solid fragments and therefore performs the desired function even when small in diameter, i.e. in shield diameter.

Abstract: An earth removing apparatus for a shield tunneling machine comprising a tubular casing having an excavated earth inlet at one end and a closable outlet for excavated earth at the other end, and a double-shaft screw conveyor rotatably supported by the casing at two portions. The screw conveyor is supported on the casing in the vicinity of its earth inlet by an annular member fitted in an annular recess in the casing, with a bearing provided between the annular member and the casing. Since the forward end of the screw conveyor need not be supported at the center of rotation of the cutter head of the tunneling machine, the apparatus can be designed with greater freedom and is free of objections in its mechanical structure.