Abstract: The fuel reservoir for a fuel cell is a fuel reservoir detachably connected with a fuel cell main body, and it is equipped with a fuel-storing vessel of a tube type for storing a liquid fuel and a fuel discharge part; the fuel discharge part is provided with a valve for sealing communication between the inside and the outside of the above fuel-storing vessel; and a follower which seals the liquid fuel and moves as the liquid fuel is consumed is disposed in the rear end part of the liquid fuel stored. The valve assumes a structure in which a slit is formed in an elastic material and a structure in which a valve member is pressed by a resilient body.

Abstract: In order to provide a small-sized fuel cell suitably used as an electric power source for portable electronic appliances such as cellular phones, note type personal computers and PDA, assumed is a structure in which connected are plural unit cells each of which is formed by constructing an electrolyte layer on a fuel electrode body and constructing an air electrode layer on the electrolyte layer and in which a fuel supplying member connected with a fuel storing tank for storing a liquid fuel and having a penetrating structure or the fuel electrode body is connected with the respective unit cells to supply the liquid fuel, wherein a liquid fuel occlusion body comprising a porous body and/or a fiber bundle having capillary force is accommodated in the liquid fuel storing tank.

Abstract: A fuel container includes a container body having a fuel discharge port and an interior spacing. A body of liquid fuel is filled in the interior spacing of the container body. Follower units are provided in the container body, in contact with at least a part of an end of the body of the liquid fuel. Solid follower auxiliary members are interposed between the follower units and the body of liquid fuel to be optically detectable.

Abstract: An ink reservoir for a Writing instrument molded from a gas barrier resin such as polyvinyl alcohol, an ethylene vinyl alcohol copolymer resin, polyacrylonitrile, polyamide, a cellulose resin, polyester, polycarbonate and polystyrene, wherein a vapor-scarcely permeable coating layer having a vapor permeability (P1) of 0.5 g/m2* atm*24hr/25 ?m or less at 40° and 90% RH is formed on the above reservoir for a writing instrument. In this ink reservoir for a writing instrument, a gas barrier property is not reduced under the environment of high moisture even if a wall of the ink reservoir is relatively thin and a resin having an excellent transparency is used, and releasing of pressurized air in the ink reservoir and falling of the tip member are not caused.

Abstract: A liquid fuel is contained in a fuel container, and the liquid fuel is discharged from a fuel outlet. Further, a water is contained in a water containing pipe provided in the fuel container, and the water is discharged from a water outlet to the outside. Air taken into the fuel container through a dustproof filter attached to a rear lid portion of the fuel container is discharged to the outside from an oxygen source outlet through an oxygen source pipe. The fuel outlet, oxygen source outlet and water outlet are provided in a front outer surface of the front lid portion.

Abstract: Provided is an ink reservoir for a writing instrument molded from a gas barriering resin such as polyvinyl alcohol, an ethylene*vinyl alcohol copolymer resin, polyacrylonitrile, polyamide, a cellulose resin, polyester, polycarbonate and polystyrene, wherein a vapor-scarcely permeable coating layer having a vapor permeability (P1) of 0.5 g/m2*atm*24 hr/25 &mgr;m or less at 40° and 90% RH is formed on the above reservoir for a writing instrument.