Abstract: A method of making a fuser member such as a fuser roller, pressure roller, or fuser belt, comprising of bonding an outermost fluoropolymer resin layer to an inner fluoroelastomer layer by means of a fluoropolymer-containing polyamide-imide primer layer.

Abstract: A charging roller for use in a xerographic copying machine includes a cylindrical roller core, and a ceramic layer formed by plasma spraying a blend of an insulating ceramic material and a semiconductive ceramic material in a ratio which is selected to control an RC circuit time constant of the ceramic layer in response to an applied voltage differential. The ceramic layer is sealed with a solid, low viscosity sealer, such as Carnauba wax, to protect the ceramic layer from moisture penetration.

Abstract: There is provided a paper feed roller capable of being used for delivering and feeding paper, which is high in coefficient of friction, has sufficient hardwearing properties with the coefficient of friction not affected by the change in environment of temperature and humidity, is low in ink transferability and is small in change in passage of year of the coefficient of friction of the surface.A coating layer 5 formed of an elastic material such as rubber is formed on an surface of a core material 4 molded of a foamed material such as sponge, and a bonding agent 6 having an elasticity such as denatured silicon is coated on the surface of the coating layer 5 so that ceramic particles 7 are fixed without clearance to provide a paper feed roller 1. Alternatively, the bonding agent 6 is directly coated on the surface of the core material 4 molded of a pliable material such as soft rubber and sponge so that the ceramic particles 7 are fixed without clearance to provide the paper feed roller 9.

Abstract: Metal inking rolls, particularly for flexographic printing, having: A roll structure composed of an ammonia hardenable steel, in particular stainless steel, the selection of a roll wherein the minimum thickness of the wall, if tubular, is a direct function of the diameter and an inverse function of the length of the roll, so that, when the roll is supported at its ends and stressed in the middle, on a surface relatively distributed, it may be permanently distorted in the axial direction but without distorting its cross-section; a post-engraving ionic nitriding treatment to increase the surface hardness of the screen to at least 60 HRC and a final straightening step, to reduce the screen eccentricity at least 0.02 mm.

Abstract: A fluid transfer roller for use in offset printing for picking up a film of water and transferring it to a printing plate consists of a rigid core with an outer layer of foamed-in-place, partially open-celled foam.

Abstract: A paper feed roller for delivering and feeding paper, which has a high coefficient of friction that is not affected by changes in temperature or humidity, good hardwearing properties, and is low in ink transferability. The paper feed roller includes a coating layer formed of an elastic material such as rubber which is formed on a surface of a core material molded of a foamed material such as sponge. A bonding agent having an elasticity such as denatured silicon is coated on the surface of the coating layer. Ceramic particles are embedded and fixed in the bonding agent In an alternative embodiment the bonding agent is directly coated on the surface of core material which is molded from a pliable material such as soft rubber and sponge.

Abstract: Coated fuser members such as a fuser roller, pressure roller, or fuser belt, and the method of making the coated fuser members are disclosed. The release coating comprises an outermost layer of fluoropolymer resin uniquely bonded to a fluoroelastomer layer by means of a fluoropolymer-containing polyamide-imide primer layer.

Abstract: A hearth roller has an outer sleeve which constitutes a hearth roller barrel is disclosed. An inner sleeve is fitted into the outer sleeve and innermost sleeve is fitted into the inner sleeve. The ends of the inner sleeve in the axial direction are positioned inwardly and separated from each of the ends of the outer sleeve and are sealed by a metal. The inner sleeve has substantially the same linear expansion coefficient as the outer sleeve but exhibits higher thermal conductivity.

Abstract: A composite idler roller has an integral internal bearing surface which interfits with the outer or tread portion of the roller. Flange seals or internal lubricant retaining grooves may be incorporated in the bearing surface. The outer or tread portion of the roller is inserted in a mold concentric with a core pin. The bearing material is injected into the space between the outer portion and the core pin. The centering of the outer portion may be by external contact with the mold or internal shoulder contact with the core pin. The core pin may be wholly or partly collapsible. The roller may have a wide variety of tread styles and may be stud or yoke mounted. In another form, the entire roller is formed of the bearing material.

Abstract: A self biasable transfer roll system for transferring toner particles from an image support surface to a copy substrate, including a conformable roll member, comprising a core having a layer of compressible material radially surrounding the core, and a peripheral surface layer comprising piezoelectric material positioned along a circumference of the roll member for generating an electric field when deformed.

Abstract: A process for making metal inking rolls, particularly for flexographic printing, having: A roll structure composed of an ammonia hardenable steel, in particular stainless steel, the selection of a roll wherein the minimum thickness of the wall, if tubular, is a direct function of the diameter and an inverse function of the length of the roll, so that, when the roll is supported at its ends and stressed in the middle, on a surface relatively distributed, it may be permanently distorted in the axial direction but without distorting its cross-section; a post-engraving ionic nitriding treatment to increase the surface hardness of the screen to at least 60 HRC and a final straightening step, to reduce the screen eccentricity at least 0.02 mm.

Abstract: A composite idler roller has an integral internal bearing surface which interfits with the outer or tread portion of the roller. Flange seals or internal lubricant retaining grooves may be incorporated in the bearing surface. The outer or tread portion of the roller is inserted in a mold concentric with a core pin. The bearing material is injected into the space between the outer portion and the core pin. The centering of the outer portion may be by external contact with the mold or internal shoulder contact with the core pin. The core pin may be wholly or partly collapsible. The roller may have a wide variety of tread styles and may be stud or yoke mounted. In another form, the entire roller is formed of the bearing material.

Abstract: An elastic roll member that can be suitably used in OA printers, facsimile machines and in the developing unit and the paper feed unit of an electronic copying machine comprises a shaft member having a circular cross section and an elastic member concentrically attached to the outer periphery of the shaft member. The shaft member is provided with a connecting member which is different in cross section from and larger in diameter than the shaft member along its longitudinal direction, so that by forcing the connecting member into a through-hole provided in the elastic member, the shaft member and the elastic member can be integrally combined. The elastic roll member can be manufactured with ease and at low cost as it requires no complicated adhesion process.

Abstract: A compressible roller especially useful in high speed printing systems consists of a rigid core and a compressible cover. The cover consists of a first relatively thick layer of compressible foam containing entrapped gas which is bonded to the core; an elastomeric seal, which prevents the entrapped gas from leaving the foam, bonded to the foam; and an outer print layer of a compatible elastomer bonded to the seal.

Abstract: A low cost, disposable, unitized dampening roller/dampening cover component consisting of a hollow tube on which is fixedly bonded a resilient layer and with a moisture absorbent cover fixedly bonded on the resilient layer. The tube is fitted with supportive injection molded end caps for mounting the roller/cover component as an integral component on a lithographic press. This all in one construction allows for fast and easy changing of dampening covers.

Abstract: An electrically conductive roll including (a) a cylindrical core body, (b) an electrically conductive, resilient layer located radially outwardly of the core body, the resilient layer containing a softening agent, (c) a preventive layer located radially outwardly of the resilient layer, the softening agent being prevented from spreading by the preventive layer, the preventive layer being formed of N-methoxymethylated nylon as a major constituent thereof, and containing an electrically conductive material, and (d) a resistance adjusting layer located radially outwardly of the preventive layer, the adjusting layer being formed of epichlorohydrin-ethylene oxide copolymer rubber as a major constituent thereof, the core body, resilient layer, preventive layer and adjusting layer constituting an integral cylindrical body.

Abstract: A heat transfer roll has first and second disc-shaped outer end sections each having a centrally located tubular shaft. An inner tubular body is fitted over the two outer end sections, and a plurality of spiral ribs extend from the first end to the second end around the inner tubular body, and an outer tubular shell is fitted over the spiral ribs to form a plurality of spiral channels. Each of the end sections have one or more passageways therein which are in communication with the bore through the tubular shaft and the spiral channels. One of the outer end sections is adapted to receive a plurality of removable plugs, such that each removable plug when inserted will block the flow of liquid to one of the spiral channels. To clean such a heat transfer roll, all but one channel may be closed such that the remaining open channel may be cleaned.

Abstract: A die stamp formed disc construction including a toothed plate and a two-stepped sleeve integrally formed thereon. The sleeve has coined or stamped interior and exterior forty-five degree flats. The flats are accurately positioned so that, with the discs received through their central openings and clamped together onto the rotation shaft, the interior flat of one disc is held directly against the exterior flat of the adjacent disc thereby accurately and consistently positioning and holding the toothed plates of adjacent discs in spaced relation and preventing disc wobble.

Abstract: Support for rolling rings on rolling stands having rolls supported as cantilevers, comprising a shaft (16) with a first flange (12) and a second flange (13), a rolling ring (11) having substantially parallel lateral walls being interposed therebetween, the second flange (13) operating towards the first flange (12) owing to the action of threaded clamping bolts (14), the first and second flanges (12-13) including undercuts (17), in which support:the shaft (16) extends beyond the rolling ring (11) so as to create a first toric protrusion (20),the second flange (13) comprises a toric hollow (21), which mates with the first toric protrusion (20) and is coupled thereto, and comprises also a second toric protrusion extending within the first toric protrusion (20) and mating therewith,and the undercuts (17) of the first (12) and second (13) flanges include rings (22) made of an antifriction material.