Abstract: A pump-equipped liquid developer supply vessel is composed of a liquid developer supply vessel which holds a liquid developer therein; a cylinder with a bottom portion including a piston hole therein, a liquid developer suction hole with a liquid developer suction valve; a piston device which is slidably disposed within the cylinder, the piston device including a piston with a liquid developer inlet and a liquid developer inlet valve, a piston cover which is provided above the piston to form an inner space therebetween to hold the liquid developer therein, a piston shaft which, in a sealed state, passes through the piston hole formed in the bottom portion of the cylinder, and is integrally connected with the piston in such a manner as to slidably move the piston device along the inner side of the cylinder, when pressed upward or downward, the piston shaft including therein a developer discharge conduit which is connected to the inner space of the piston device and from which the liquid developer can be discha

Abstract: A flame-retardant styrene-base resin composition is composed of 100 parts by weight of a styrene-base resin, 2.0-20.0 parts by weight of a halogenous flame retardant and 0.1-5.0 parts by weight of an antimony compound. The weight ratio of halogen atoms/antimony atoms in the resin composition is 5 or greater. The resin composition of this invention has well-balanced specific gravity, impact resistance and heat resistance and flame retardancy.

Abstract: An electrostatic charge-removing device adapted to remove electrostatic charges formed on a light-sensitive member of a copying machine using a tungsten lamp as an erasing lamp. A filter for cutting off light of longer wavelengths is provided between the tungsten lamp and the light-sensitive member. With this device, the sensitivity of the light-sensitive member is not affected, the amount of output light does not vary with changes in the ambient temperature, and a stable amount of light is obtained over long periods of time. Moreover, the lamp can be started instantaneously without the use of a special circuit.