A side seal is doubly provided to prevent toner from leaking outside each end of a housing that accommodates a developing roller in position, with respect to an axial direction of the developing roller. The side seal comprises an inner seal and an outer seal with a specified distance from each other. If toner leaks outside the inner seal, the toner enters a space between the inner seal and the outer seal, so that the toner can be reliably sealed between the developing roller and the outer seal.

In a printer that is connected to a host personal computer via an external recording device through parallel interfaces, a signal that has been received from the host personal computer is detected by an ASIC at specified sampling cycles and to allow an interrupt in case it is detected that this signal is a signal for instructing start of communication; in case the interrupt has been made while printing actions are being executed, a CPU notifies the host personal computer of a busy condition; in ...

A developing apparatus includes a container containing a developing agent and having an opening; a developer bearing member provided at the opening of the container; a magnetic sealing member magnetically restricting leakage of the developing agent out of an end of the developer bearing member in a longitudinal direction of the developer bearing member the magnetic sealing member being formed at the end in the longitudinal direction of the developer bearing member as extending along a circumfere...

A coolant reservoir is physically spaced apart from and elevated above the lower surface of an engine cooling system radiator. A coolant transfer conduit permits excess coolant to be transferred from the radiator into the coolant reservoir. A first one way check valve prevents fluid flow from the radiator into the reservoir unless the pressure within the cooling system exceeds a predetermined maximum value. A coolant refill conduit provides a coolant flow path between the reservoir and the radia...

A shipboard storage tank for liquids, such as petroleum products or chemicals. To prevent pressure buildup, and to permit overflow during filling, a vent and overflow conduit is provided. In order to prevent this vent and overflow conduit from becoming a source of pollution if the ship should sink and also in order to prevent loss of the contents of the tank upon sinking, the invention provides an anti-pollution valve installed in the conduit, which automatically closes the conduit, should the s...

A gear pump and motor having a housing, a pair of gears engaged with each other, and a seal block disposed between the inner surface of the housing at high pressure side and the teeth ends of the gears, which has the seal block having a passage formed therethrough for hydraulic oil, a plurality of pressure chambers formed between the inner surface of the housing and the seal block, and a plurality of holes or passage are formed in the seal block for communicating the pressure chamber with the ge...

A photodetector to be used to produce a track error signal or the like by receiving the reflected light of light beams radiated to an optical recording medium is formed of a plurality of photodetecting devices provided as divided on a common chip and is provided with either a; leaking current absorbing member for suppressing a leaking current form overflowing through the chip from the photodetecting device receiving a light beam of a large light amount into the other photodetecting devices causi...

A shock absorbing cushioning mat designed to protect the compartment liner of a liquid or oil carrying sea going vessel from tear or puncture by steel from the vessel's structure being forced inward by the external pressure created by grounding or collision of a bulk liquid carrying sea going vessel, while providing a firm yet flexible foundation for the compartment liner to eliminate or greatly reduce the potential for spillage of the cargo. The present invention also addresses the problem of c...

A developing apparatus is provided with a container for containing a developer having magnetic particles. A rotatable member is rotatable in contact with the developer in the container. The rotatable member is supported in the container by a bearing. A magnetic member encloses at least a portion of the rotatable member at a position adjacent to the bearing. The rotatable member comprises a ferromagnetic material disposed at least at a portion facing the magnetic member. The ferromagnetic materia...

A partially leaky pulling plug (10) coupled to the foremost end (8) of a cable (4) which is to be pulled through a tubular cable conduit (6) with the aid of drag forces of a flowing medium, is provided with a suitably dimensioned flow opening (12) for allowing the flow-through of the flowing medium in a manner not reducing the drag forces considerably, however with a certain pressure difference (Px-Px') across the plug (10). This pressure difference imparts thrust to the plug. The thrust of the ...