Abstract: An elastic blade regulates the layer thickness of a toner used in the developing device of an image forming apparatus such as an electrophotographic apparatus. The elastic blade is manufactured by providing a metal layer consisting of a rolled metal. The metal layer has a warped shape including a convex side caused by rolling the metal layer. A rubber layer is provided only on a surface of the metal layer at the convex side thereof.

Abstract: There is provided a molding method of a thermosetting resin in which the formation of a flash can be prevented. This molding method comprises pouring or injecting the thermosetting resin into a mold, and then heating and molding it, and the method further comprises the step of locally heating an unnecessary gap and its peripheries of the mold, which are not concerned with the molding of the thermosetting resin into a desired article having a required shape, whereby the resin in the gap and its peripheries are promptly set to reduce the leakage of the resin into the unnecessary gap.

Abstract: A developing roller having a superior setting ability and having a uniform and high conductivity is provided by improving dispersion and stability of carbon black mixed in a solution of a coating resin, and then forming a resin layer that has a low modulus of elasticity and a high conductivity when coated. The developing roller includes a core shaft, an elastic body layer formed around the core shaft and made of rubber as a main ingredient, and a resin layer coated at least on an outer surface of the elastic body layer. The resin layer contains carbon black having a DBP absorption amount of 80 to 110 ml/100 g, a ratio of a DBP absorption amount to a nitrogen specific surface area being not more than 0.012 ml/m2, and a ratio of a volatile component to a nitrogen specific surface area being not more than 2.0×10−4 g/m2.

Abstract: A developing roller having a superior setting ability and having a uniform and high conductivity is provided by improving dispersion and stability of carbon black mixed in a solution of a coating resin, and then forming a resin layer that has a low modulus of elasticity and a high conductivity when coated. The developing roller comprises a core shaft, an elastic body layer formed around the core shaft and made of rubber as a main ingredient, and a resin layer coated at least on an outer surface of the elastic body layer. The resin layer contains carbon black having a DBP absorption amount of 80 to 110 ml/100 g, a ratio of a DBP absorption amount to a nitrogen specific surface area being not more than 0.012 ml/m2, and a ratio of a volatile component to a nitrogen specific surface area being not more than 2.0×10−4 g/m2.

Abstract: This specification discloses an elastic blade for regulating the layer thickness of a toner used in the developing device of an image forming apparatus such as an electrophotographic apparatus. The elastic blade is provided with a base layer and an elastic layer provided on the convex surface side of the base layer, and is high in flatness.

Abstract: A developer-regulating member includes a rubber elastomer blade pressed against the surface of a developer-feeding member and a holder for holding the rubber elastomer blade. The holder is warped in the direction of flattening the face of part of the rubber elastomer blade, that face being pressed against the surface of the developer-feeding member.

Abstract: A high-precision injection-molded toner-amount regulating elastic blade used for high-quality development, particularly, an elastic blade in which the generation of rust is prevented by suppressing peeling of a plated layer from a supporting plate, is provided. The elastic blade is used in an image forming apparatus in which an electrostatic latent image formed on an image bearing member is developed using a toner to provide a visual image. A preserved steel plate obtained by plating a zinc alloy on surfaces of an iron material is used as the supporting plate. A rubber elastic member for regulating the amount of the toner is supported on the supporting plate.

Abstract: A developer regulating blade for regulating the amount of toner on a developing roll in an electrostatic image forming apparatus includes and elastic member that forms a nip in cooperation with the developing roll. A supporting member of the regulating blade includes a section that supports the elastic member and another section which does not support the elastic member. The elastic member supporting section has a higher elastic limit than the non-supporting section.

Abstract: An elastic blade is used in a developing device for controlling the amount of a developing agent (or a thickness of a developing agent fed onto a developing sleeve). The blade has on its surface an electrifying layer formed out of a specific polyamide elastomer. The polyamide elastomer is comprised preferably of a block copolymer of polyamide and polyester.

Abstract: A developer amount controlling member which has a support layer for controlling pressure and an elastic layer for controlling triboelectricity provided thereon, wherein both end portions of the developer amount controlling member are curved from the central portion thereof towards the elastic layer side.

Abstract: An elastic blade for press contacting a developing roller to regulate a thickness of a layer of developing agent conveyed by the developing roller to a developing area includes a springlike supporting plate, and a centrifugally molded rubber elastic layer coated on the supporting plate.

Abstract: The present invention relates to a member for regulating the quantity of a developer, that is free from deterioration in the physical properties thereof, even if the same is used for a long time. The member regulates the quantity of a developer being made of a polyurethane rubber composition which contains an amine-type catalyst.