Abstract: A developer cartridge includes an outside frame, an inside frame, a first sealing member and a second sealing member. The outside frame includes an outside supply opening and an outside return opening. The inside frame includes a developer chamber for accommodating a developer, an inside supply opening and an inside return opening. The first sealing member is provided around one of the inside return opening and the outside return opening between the inside frame and the outside frame and is contactable with the inside frame and the outside frame with a first contact pressure. The second sealing member is provided around one of the inside supply opening and the outside supply opening between the inside frame and the outside frame and is contactable with the inside frame and the outside frame with a second contact pressure that is greater than the first contact pressure.

Abstract: A developer cartridge includes a housing attachable to and detachable from a developing device and accommodating developer and an agitator agitating the developer in the housing and supplying the developer to the developing device through a supply opening of the housing. The agitator includes a rotation shaft, a support plate, a delivery agitation blade supported by the support plate and passing through a position opposing the supply opening along an inner surface of the housing by rotation of the rotation shaft, an entire width of a first end portion of the delivery agitation blade being supported by a distal end portion of the support plate, and an oblique agitation blade erected from a surface of the support plate and oblique to the rotation shaft in order to move the developer in an axial direction of the rotation shaft toward the supply opening.

Abstract: A developing device includes: a first conveying unit that is provided within a developing agent storage chamber and that is configured to convey a developing agent from one end of the developing agent storage chamber to another end of the developing agent storage chamber in a longitudinal direction of a developing agent carrier that is disposed with in a developing chamber and to supply the developing agent from the developing agent storage chamber to the developing chamber; a second conveying unit that is provided within the developing chamber and that is configured to convey the developing agent from the other end of the developing chamber to the one end of the developing chamber in the longitudinal direction and to supply the developing agent toward a developing agent carrier; and a third conveying unit that is provided between the one end of the developing agent storage chamber and the one end of the developing chamber and that is configured to convey the developing agent from the one end of the developin

Abstract: An arrangement for providing developer to process cartridges is described. Developer agent storing members may be insertable into a body containing the process cartridges through a front of the body. The developer agent storing members may be provided on two sides to reduce the stacked height of the developer agent storing members in the body.

Abstract: A PLL-mode radiofrequency module capable of being connected to a transmitter of any kind. The PLL-mode module is provided therein with a CPU, which functions to vary a waveform of a PPM signal fed thereto from a transmitter body so as to permit a pulse duty ratio of the PPM signal to be about 50%. The PPM signal thus varied is fed to a modulation circuit and then subjected to FSK modulation, so that a PLL oscillator constituted by a PLL circuit and a modulation circuit or voltage control oscillator generates a frequency as indicated by a rotary switch. A carrier frequency controller thus constructed is arranged on a side of the PLL-mode radiofrequency module rather than the transmitter body, so that the PLL-mode radiofrequency module may be connected to a transmitter of any kind.

Abstract: A radio control device includes a transmitter, in which a crystal type high frequency module equipped with a high frequency circuit corresponding to a frequency band of a carrier and a PLL high frequency module equipped with the high frequency circuit and a PLL circuit for controlling a frequency of the carrier depending on a phase difference between the carrier and a reference signal of oscillator are detachably mounted. Such construction permits the crystal type high frequency module and PLL high frequency module to be selectively used as desired and transmission data to be output by means of the carrier of a desired frequency set depending on the high frequency module.

Abstract: A radio-frequency module detachably mounted to a transmitter in a radio-control apparatus to supply a high frequency signal to a transmitter. The module includes a phase-lock loop (PLL) circuit along with low pass filters and a voltage controlled oscillator to form a PLL oscillator loop. A rotary switch which is manually set provides an indication to a microprocessor of the desired frequency. The microprocessor supplies the PLL circuit with frequency data. An error voltage is generated by the low pass filters.

Abstract: A radio control device includes a transmitter, in which a crystal type high frequency module equipped with a high frequency circuit corresponding to a frequency band of a carrier and a PLL high frequency module equipped with the high frequency circuit and a PLL circuit for controlling a frequency of the carrier depending on a phase difference between the carrier and a reference signal of oscillator are detachably mounted. Such construction permits the crystal type high frequency module and PLL high frequency module to be selectively used as desired and transmission data to be output by means of the carrier of a desired frequency set depending on the high frequency module.

Abstract: A system follows up or traces a moving body accompanied by a radio signal transmitter which constantly generates a radio signal of a predetermined frequency or is adapted to generate such a radio signal when the user manually operates the transmitter should an emergency arise. The system includes two different antenna networks, one comprising a plurality of non-directional antennae disposed substantially evenly over a specific area, always ready to receive the radio signal which will or may be transmitted from anywhere in the area, and the other comprising directional antennas mounted at several points in the area.