Abstract: A toner conveyance roller for an image forming apparatus including a toner image forming mechanism including a developing roller and the toner conveyance roller which is arranged opposite to the developing roller and used for supplying and scraping toner, wherein the toner conveyance roller has a roller part and a shaft part, the roller part includes a substantially cylindrical elastic layer composed of an elastic foaming body on a surface of the roller part, and a density of the elastic layer is higher in a longitudinal center part of the roller part than in both longitudinal end parts thereof, and a method for manufacturing the toner conveyance roller including a step of heat-pressing the crown-shaped elastic foaming body, and thereby, forming the elastic layer.

Abstract: Provided is a technique for manufacturing a toner supply roller in which the toner conveying performance and the scraping performance of unneeded toner are excellent as well as the above-mentioned problems in molding can be resolved.

Abstract: An object of the present invention is to provide a toner-conveying roller that has high toner-conveying property and in which a roller-shape thereof is less likely to be transferred to the image, a mold capable of manufacturing said roller, and a method of manufacturing said mold. The toner-conveying roller according to the present invention has a shaft body and a urethane foam layer formed around the shaft body, and recesses and protrusions are irregularly formed on a circumference surface of the urethane foam layer. The mold for manufacturing the roller according to the present invention has recesses and protrusions irregularly formed on the inner surface of a mold for manufacturing the roller.

Abstract: A toner conveyance roller for an image forming apparatus including a toner image forming mechanism including a developing roller and the toner conveyance roller which is arranged opposite to the developing roller and used for supplying and scraping toner, wherein the toner conveyance roller has a roller part and a shaft part, the roller part includes a substantially cylindrical elastic layer composed of an elastic foaming body on a surface of the roller part, and a density of the elastic layer is higher in a longitudinal center part of the roller part than in both longitudinal end parts thereof, and a method for manufacturing the toner conveyance roller including a step of heat-pressing the crown-shaped elastic foaming body, and thereby, forming the elastic layer.

Abstract: Provided is a technique for manufacturing a toner supply roller in which the toner conveying performance and the scraping performance of unneeded toner are excellent as well as the above-mentioned problems in molding can be resolved.

Abstract: Provided is an image forming device in which the cost needed for a roller member as a whole can be reduced, as well as a manufacturing process of the roller member can be simplified, and a method of manufacturing the roller member. Provided is an image forming device comprising, on the outer periphery of a shaft, at least two types of rollers each having an elastic layer composed of polyurethane foam of the same composition, in which the at least two types of rollers are selected from the group consisting of a toner feed roller, a transfer roller and a cleaning roller. At least one of the at least two types of rollers is preferably subjected to a heat pressing process.

Abstract: An object of the present invention is to provide a toner-conveying roller that has high toner-conveying property and in which a roller-shape thereof is less likely to be transferred to the image, a mold capable of manufacturing said roller, and a method of manufacturing said mold. The toner-conveying roller according to the present invention has a shaft body and a urethane foam layer formed around the shaft body, and recesses and protrusions are irregularly formed on a circumference surface of the urethane foam layer. The mold for manufacturing the roller according to the present invention has recesses and protrusions irregularly formed on the inner surface of a mold for manufacturing the roller.

Abstract: Disclosed herein is a headphone apparatus including: two cases; a connecting part configured to connect the two cases to each other; a detector configured to detect connection of the two cases to each other via the connecting part; and a controller configured to carry out predetermined control in response to detection of connection of the two cases to each other by the detector.

Abstract: The present invention is relates to a proton conducting electrolyte comprising a novel polymer compound having a sulfonic acid group that is widely used in the industrial field. The polymer of the present invention may be prepared by a simple reaction scheme under mild conditions. Additionally, the present invention is related to a fuel cell using the proton conducting electrolyte of the present invention. The proton conducting electrolyte may comprise at least one polymer of polysulfonatealkoxyphenyleneoxide having a backbone of polyphenyleneoxide and a side chain of sulfonatealkoxy group.