摘要:
A charging roll including a center shaft, a foam layer formed on an outer circumferential surface of the center shaft, an electrically conductive elastic layer formed on an outer surface of the foam layer, and a resistance adjusting layer and a protective layer formed by coating on an outer surface of the electrically conductive elastic layer. The foam layer is an electrically conductive foam body or a foam body a part of which is made electrically conductive. A method of producing a composite roll, such as the above charging roll, which includes a foam layer formed on a shaft, and a solid elastic layer formed on the foam layer, includes the step of forming multiple minute grooves in an outer circumferential surface of a pre-foam tube which gives the foam layer, or an inner circumferential surface of an elastic tube which gives the solid elastic layer.
摘要:
An electrically conductive roll is disclosed, which includes: a center shaft; a base layer formed on an outer circumferential surface of the center shaft and including an elastic material as a major component and an ion-conductive material, the base layer having a volume resistivity of 10.sup.6 -10.sup.9 .OMEGA.cm; an electrode layer formed on an outer surface of the base layer and including a synthetic resin material as a major component and an electron-conductive material, the electrode layer having a volume resistivity of not more than 10.sup.3 .OMEGA.cm; a resistance adjusting layer formed on an outer surface of the electrode layer; and a protective layer formed on an outer surface of the resistance adjusting layer.
摘要:
An apparatus for assisting decisions for improvement of environmental loads has: environmental load per-process collecting means; proportional distributing condition per-parts storing means for storing conditions to proportionally distribute the environmental loads every parts; parts attribute storing means; manufacturing condition storing means; parts attribute calculating condition storing means for storing environmental load calculating conditions to calculate the environmental load per parts; environmental load per-parts calculating means; environmental load per-parts/process storing means for storing the environmental loads every parts/process; bill of materials (BOM) storing means; product manufacturing amount storing means; contribution degree per-product/process evaluating means for collecting the environmental loads per parts/process and calculating a contribution degree of each product to the environmental load amount of each process by multiplying the collected environmental load amount by the number of products; and environmental load distribution table per-product/process storing means.
摘要:
An extendable/contractible writing instrument with a simple rotating operation. The writing medium is exposed through a rotating motion, while at the same time also exposing an auxiliary tool, such as a silicon gum eraser, at the opposite end.
摘要:
A telescopic ball-point pen includes a tubular body, including a sliding axial tube, which in turn includes a refill tank. An interior surface of the body and an exterior surface of the sliding axial tube are threaded to form a driver screw portion, and an interior surface of the sliding axial tube and an exterior surface of the refill tank are threaded to form a follower screw portion. A pitch of the follower screw portion is greater than that of the driver screw portion so that the amount of front-and-back movement of the refill tank is greater than that of the sliding axial tube per rotation. A rear end of the sliding axial tube is fixed to a sheath. When the sheath and the body are rotated, the tip of a ball-point pen refill removably received within the refill tank is projected beyond, or received within, the pen.
摘要:
A charging roll which is held in rolling contact with a photosensitive drum for charging the photosensitive drum. The charging roll includes an outermost layer formed of a resin composition containing a grafted carbon as an electrically conductive agent. The grafted carbon includes a carbon black and a polymer which is grafted on the carbon black so as to cover a surface of the carbon black.
摘要:
An ink supply device for a printing apparatus, the ink supply device being positioned within a porous cylindrical drum and including: a frame body having side plates confronting each other; an ink supply roller supported between the side plates by the frame body, a lower portion of the ink supply roller coming in contact with an inner circumferential surface of the cylindrical drum, and the ink supply roller being rotatable about a central axis thereof and in synchronism with the rotation of the cylindrical drum; an ink amount control member supported between the plates by the frame body, and having a predetermined gap with respect to an outer circumferential surface of the ink supply roller while extending along one generatrix of the ink supply roller, wherein the ink amount control member, the ink supply roller and the side plates cooperate to form a space in which ink is pooled; a rodlike member supported between the side plates by the frame body and extending within the space where ink is pooled along the generatrix of the ink supply roller; an ink distributor supported by the frame body and positioned above the ink supply roller; and grooves arranged on the ink amount control member, for spreading ink in the space where ink is pooled along the generatrix of the ink supply roller while the ink supply roller is being rotated.
摘要:
A polishing pad is provided with a compression elastic modulus of 0.17 MPa or more and 0.32 MPa or less produced by preparing a nonwoven fabric formed of bundles of ultrafine fibers with an average monofilament diameter of 3.0 μm or more and 8.0 μm or less, preparing a polishing pad base by impregnating the nonwoven fabric with a polyurethane based elastomer in an amount of 20 mass % or more and 50 mass % or less relative to the mass of the polishing pad base, and laminating the polishing pad base with a porous polyurethane layer containing wet-solidified polyurethane as primary component which has openings with an average opening diameter of 10 μm or more and 90 μm or less in its surface to serve as polishing surface layer.
摘要:
A compressing device, a drive shaft and a bearing device are assembled into a tubular member. All-around welding of a cover member to the tubular member is performed to form a casing in such a manner that welding is overlapped over a welding start point, at which the all-around welding is started, to form an overlapped portion in a welding bead generated by the all-around welding. In the all-around welding, heat input is externally applied to a diametrically opposite portion of the casing, which is diametrically opposite to the overlapped portion, so that the diametrically opposite portion is deformed symmetrically with respect to a welding distortion at the overlapped portion.
摘要:
An extendable/contractible writing instrument with a simple rotating operation. The writing medium is exposed through a rotating motion, while at the same time also exposing an auxiliary tool, such as a silicon gum eraser, at the opposite end.