Abstract: A developing roller includes a metal shaft and a conductive resilient sleeve surrounding the shaft and made of a urethane elastomer containing carbon black with at least pH 5. The developing roller is mounted in an electrophotographic apparatus in combination with a latent image-bearing photoreceptor wherein development is carried out using a non-magnetic single-component toner.

Abstract: The present invention relates to a composite tubular article for use as the fixing belt in an image-forming device such as a copying machine etc., particularly as a fixing belt suited for thermal fixing, and also relates to a process for producing the same.Conventionally known as an image-fixing belt is a belt consisting of a polyimide resin as the inner layer and a fluoroplastic as the outer layer. However, this fixing belt has problems that clear images cannot be obtained because the thickness of each layer is uneven, and that unglossed, so-called matt images cannot be obtained because the belt surface is smooth.This invention provides a composite tubular article comprising a tubular inner layer made of a polyimide resin and a tubular outer layer made of a fluoroplastic, the outer circumferential surface of the fluoroplastic tubular outer layer having a surface roughness of 1 to 10 .mu.m.

Abstract: This invention relates to a rotary member for fixing having an elastic layer; an off-set preventive layer as the rotary member surface layer; and an intermediate layer having silicone varnish provided between the elastic layer and the off-set preventive layer.

Abstract: A fuser member comprised of a substrate, thereover a silicone rubber containing a filler component therein, and wherein said filler component is reacted with a silicone hydride release oil.

Abstract: A roll wherein a non-adherent coating layer comprises a peroxide crosslinked fluororubber in which a low-molecular weight ethylene tetrafluoride resin or low-molecular weight ethylene tetrafluoride and a powder of a solid element and/or an inorganic compound having surface energy higher than that of copper are compounded.

Abstract: A tape driving mechanism for a magnetic recording apparatus has a capstan rotated to advance a magnetic tape by pinching the magnetic tape between the capstan and a pinch roller. The pinch roller is pressed onto the magnetic tape against the capstan. The capstan surface is coated with a diamond-like carbon film which is smooth and highly wear-resistant. The difference between the tangential speed of the capstan and the tape transfer speed is almost zero. Thus, the state of contact is static. A static frictional coefficient between the diamond-like carbon film of the capstan and the magnetic tape is almost equal to twice the static frictional coefficient between the metal surface of the capstan and the magnetic tape in the conventional tape driving mechanism. The tape driving force thus remains sufficient even if the pressure exerted by the pinch roller is reduced to half the value employed in the conventional tape driving mechanism. The diamond-like carbon film may be coated on a rough surface of the capstan.

Abstract: A silicone composition is formed as a system including: a silicone compound, reactive group-containing modified silicic acid powder of which surface has been modified with an alkylsilane, a hexamethyldisilazane, a dimethylsilicone oil, or a mixture thereof, and an unsaturated group-containing silane compound; and inorganic fine powder carrying a surfactant. The silicone compound is preferably an addition reaction-type silicone rubber prepared from a dimethyl polysiloxane having a vinyl group, a methylhydrogenpolysiloxane and a platinum-based catalyst. The silicone composition is heat-cured to provide an elastic revolution body which is suitably used to constitute one or both of a fixing roller and a mating pressure roller in a roller fixing device for electrophotography.

Abstract: A developer for sheets of dry silver media includes an oven having a film entrance and a film exit. A bed of spaced rollers of low thermal conductivity foam material is positioned within the oven between the entrance and exit. A roller drive mechanism rotates the rollers causing the film to be transported through the oven and developed without visible patterns.

Abstract: A guide roll comprising an inside layer made of a fiber-reinforced material which consists essentially of an epoxy resin composition as a matrix and at least one kind of reinforcing fibers selected from the group consisting of carbon fibers, glass fibers, alumina fibers, aramide fibers, polyester fibers and polyethylene fibers, and an outside layer which consists essentially of a fluororesin.

Abstract: The invention provides a fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer and having at least one other layer thereover, characterized in that the base cushion layer has zinc oxide particles dispersed therein in a concentration of from 8 to 40 percent of the total volume of the base cushion layer. The base cushion layer of such a fuser roll has been unexpectedly found to exhibit only minimal weight loss, creep, and changes in hardness, over time, when subjected to conditions of elevated temperature and cyclic stress.

Abstract: A fuser roll useful for heat-fixing an electrographic toner to a substrate, wherein the roll comprises a core having thereon a base cushion layer comprising a condensation-crosslinked poly(dimethylsiloxane) elastomer, characterized in that the base cushion layer has copper oxide particles dispersed therein in a concentration of from 25 to 40 percent of the total volume of the base cushion layer.The base cushion layer of such a fuser roll has been unexpectedly found to exhibit only minimal weight loss, creep, and changes in hardness, over time, when subjected to conditions of elevated temperature and cyclic stress.

Abstract: A backup roller assembly having a plurality of rollers for applying pressure to an inside surface of a photoreceptor web, and a process for making such backup rollers is disclosed wherein a thin walled tube is extruded from a metallic or polymeric material. After extrusion, the tubing is cut to a desired length and filled with a filler, preferably a urethane foam for providing support for the thin-walled tubing, for the adhesion of journals at each end of the tube and for grounding the photoreceptor web. After the journals are attached at each end of the tubing by the adhesion of the foam, the backup roller can be ground to a precise outer diameter. In a final step, the journals are machined to the proper specifications.

Abstract: The wear-resistant compound roll is constituted by a shell portion made of an iron-base alloy having the composition consisting essentially of 1.0-3.5 weight % of C, 3.0 weight % or less of Si, 1.5 weight % or less of Mn, 2-10 weight % of Cr, 9 weight % or less of Mo, 20 weight % or less of W, 2-15 weight % of V, 0.08 weight % or less of P, 0.06 weight % or less of S, 300 ppm or less of B, the balance being substantially Fe and inevitable impurities, and a shaft portion made of steel. The iron-base alloy of the shell portion has a structure containing by an area ratio 5-30 % of granular carbides and 5 % or less of non-granular carbides, an alloy matrix of the shell portion having a Vickers hardness (Hv) of 550 or more. This compound roll has excellent wear resistance and resistance to surface roughening.

Abstract: A roller 14 for use with a surface-scraping doctor blade to meter a fluid applied to an outer surface of the roller 14. The roller 14 has the following elements: a substantially cylindrical core 101 having a core surface; a coating 105 of a polymer material 102 on the core surface, the coating 105 having a predetermined thickness and having a predetermined percent by volume of substantially hard wear-resistant particles 103, the coating 105 also having a surface which is the outer surface of the roller 14; a plurality of cells 104 in the coating 105, each of the cells 104 having at least one cell wall oriented substantially perpendicular to the outer surface of the roller 14 and having an open end at the outer surface of the roller 14. A method for the manufacture of the roller 14 and a method for using the roller 14 are disclosed.

Abstract: An ink metering roller for a keyless inking system which comprises a steel or aluminum roller core and an outer surface of highly wear-resistant hard particles imbedded in an oleophilic and hydrophobic bonding matrix, which matrix is subject to wear by contact with a coacting doctor blade, thereby creating gaps or interstices between the hard particles for conveying fixed amounts of input ink to the rotary press.

Abstract: Applicator device for a laying machine with mobile head, for laying a composite material tape on a surface of application, said device comprising a rotary application roller carried by a mount fixed to said mobile head which applies said roller against said application surface and which advances said roller transversely to its axis of rotation so that while rolling it applies said tape on said application surface.According to the invention, this device is characterized in thatsaid rotary application roller comprises a resiliently flexible shaft deformable under flexion and a cylinder of resiliently compressible material fast with said shaft,each end of said shaft is connected to said mount by an end bearing, andat least one intermediate bearing is provided between said end bearings for connecting said shaft to said mount.