Abstract: A process for preparing a magnet roller comprising a plurality of bar-like magnet pieces in a high working efficiency and in an improved adhesion accuracy, which comprises the steps of regulating the bonding position of at least two magnet pieces by their outer peripheral surfaces and their end surfaces, applying an adhesive from the inner surface side of the magnet pieces to the adhesion faces of the magnet pieces for bonding one magnet piece to another magnet piece to form a magnet block, and bonding and fixing the magnet block to a shaft. At least one of the adhesion faces which are in contact with each other may have a plurality of grooves to facilitate penetration of the adhesive into the interface of adjacent two magnet pieces.

Abstract: An insulating roll comprising: a metal conduit having an outer peripheral portion; a plurality of discs having outer peripheries and preferably fabricated from an inorganic material positioned axially on and around the metal conduit; a tubular shell having an inner surface about and spaced apart from said outer peripheries; metallic foils extending between each or a plurality of said discs from said outer peripheral portion to and beyond said outer peripheries to the inner surface of said tubular shell, said metallic foils being in interference or frictional contact with said inner surface. A novel method for attaching the tubular shell to the conduit to simplify removal and replacement thereof is also described.

Abstract: A construction of ink dispensing roller is described in which a porous ink metering layer extends around a peripheral surface of a porous ink reservoir. To prevent relative movement between the ink metering layer and the ink reservoir, the ink metering layer is securely located relative to the ink reservoir by means of elements of the ink metering layer extending beyond each axial end of the ink reservoir and being clamped between end cheeks and the axial end walls of the ink reservoir. The ink metering layer is manufactured from sheet material joined by welding along opposite edges into a tubular form. After welding the tubular form is manipulated so that an inner surface becomes a radially exterior ink dispensing surface.

Abstract: The invention relates to a method for producing a paint roller having a roller body comprised of a synthetic foam with an inner recess for placement on a support arm. The invention is characterized in that the roller body is expanded in a molding tool. Towards this end, the expansion pressure is set such that a closed compact covering of the synthetic material, preferably a polyester polyurethane foam, is formed on the outer surface of the roller body and/or on the wall of the inner recess. The coating is at least partially opened or removed in a successive method step.

Abstract: In a method and an apparatus for the production of a cylindrical embossing sheet that is to be fixed on a rotating clamping cylinder for the manufacture of continuous webs having surface structures, such as holograms, cine-grams, exelgrams, for safety and reliability engineering and decoration purposes, it is provided that the plate-like starting material is bent around an auxiliary implement in particular of cylindrical shape, the diameter of which corresponds approximately to the diameter of the clamping cylinder, with the plate-like starting material being prepared such that, when it is placed around the auxiliary implement, the longitudinal edges butt against each other by a flush joint, and that the plate-like material is fixed in this position, and that the longitudinal edges are then welded together without any gaps by means of a laser.

Abstract: An assembled idler roll having an outer shell and end bearing assemblies. The bearing assemblies each have an outer race and an inner race. The inner race is press fitted onto a roller shaft to an initial position which is spaced inwardly from a final desired position. The outer shell of the roll is restrained and the shaft is reciprocated along its longitudinal axis to determine the degree of axial movement. The inner race of the bearing assembly is moved from its initial position to its final position as determined by the degree of axial movement.

Abstract: A pressure roller for a fixing device is manufactured by extruding silicone rubber on a shaft, foaming the extruded silicone rubber, subjecting the foamed silicone rubber to primary and secondary heat treatments, polishing the heat-treated silicone rubber, and then disposing the polished silicone rubber in a resin tube. In accordance with one embodiment, the pressure roller includes a shaft, a first silicone rubber layer formed on the shaft so as to surround the shaft, a resin tube formed on the first silicone rubber layer so as to surround the shaft, the resin tube having extensions at opposite ends thereof, each extension extending beyond the opposite ends of the first silicone rubber layer, and second silicone rubber layers formed at respective opposite ends of the first silicone rubber layer between the extensions of the resin tube and the shaft. The second silicone rubber layers serve to couple the first silicone rubber layer to the resin tube.

Abstract: Roller covers and methods for manufacturing such roller covers are disclosed. According to one method, a paint carrying medium is secured to a core material to form a composite material having at least one core layer and a paint-carrying layer, wherein the composite material has opposite edges. The opposite edges are positioned adjacent to one another and are secured together. According to an alternative method, a paint-carrying medium having a backing is provided. The backing is treated to an adhering state and is applied to a core while the backing is in the adhering state. According to yet another method, a paint-carrying medium having a backing including opposite edges is provided. The opposite edges are positioned adjacent to one another and are secured to one another. According to an alternative embodiment, a roller cover includes a paint-carrying medium and a core supporting the paint-carrying medium.

Abstract: A elastomer-covered roller (10) is provided with an improved bond coating for bonding the elastomeric cover (14) to the core (11). At least one layer of material (15) is thermally sprayed on the core to form a rough surface having a roughness from 400 microinches Ra to 2000 microinches Ra or greater. In a further improvement a denser, less porous layer (17) may be applied next to the core to protect the core from corrosion, followed by a less dense layer (19) applied to the first layer and having a similarly rough surface (20) for good mechanical bonding.

Abstract: A method of manufacturing an anilox roller, in particular for a flexographic printing press, the anilox roller comprising a cylindrical core and a sleeve detachably held on the core and having at its surface an anilox layer with a grid pattern of pits, comprising the steps of

Abstract: Rollers and cylinders that are useable in a rotary printing presses are made using hollow tubular casings having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured in a force-transmitting manner.

Abstract: A elastomer-covered roller (10) is provided with an improved bond coating for bonding the elastomeric cover (14b) to the core (11b). At least one layer of material (21) is thermally sprayed on the core (11b) to form a rough surface having a roughness from 400 microinches Ra to 2000 microinches Ra or greater. At least one layer (21, 25, 26, 31, 32) is either sufficiently permeable to divert bond-degrading fluids away from the bond line (22, 27, 33) or is impermeable to bond-degrading fluids.

Abstract: A method of manufacturing an as-cast composite roll by metallurgically bonding one or more rings of cemented carbide to a cast iron casing. The composite roll may be used for hot or cold rolling. The cast iron has the following composition in addition to Fe, in weight %, 1.9-2.8% Si, 0.02-0.10% Mg, 0.5-4% Ni, 0.1-1% Mn, balance Fe and a Ceqv=2.5-6.

Abstract: Rollers and cylinders that are useable in rotary printing presses are made using hollow tubular casing having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured together in a force-transmitting manner.

Abstract: The present invention provides a liquid toner type image formation apparatus squeeze roller capable of generating a uniform pressure in the longitudinal direction of the roller portion and rotating the roller portion according to the rotation of the shaft portion even after a long period of use. The squeeze roller 1 comprises: a roller portion 2 having a metal pipe 4 and an elastic body 5 formed with a uniform thickness on the metal pipe 4; a press fit member 7 inserted in the center portion of the metal pipe 4 in the longitudinal direction; a shaft portion 3 having a diameter reduced at both ends in the longitudinal direction and a center portion having a length almost identical to that of the press fit member 7 and pressed against the inner surface of the press fit member 7; metal pins 6 fixed at an identical distance from the center of the roller portion and the press fit member in the longitudinal direction.

Abstract: A fixing apparatus for electrostatographic reproduction or digital printing comprising: (a) a core (b) a gudgeon friction welded to said core, the gudgeon consisting of through slots or holes in a shoulder of said gudgeon.

Abstract: There is described a method for manufacturing fixing rollers and a roller body holding device utilized for manufacturing fixing rollers. The method includes steps of press-fitting flanges into a roller body, shaped in a hollow cylinder, from each of both end openings of the roller body with putting an elastic material between each of the flanges and the roller body; installing the roller body in a shaping mold so that the roller body is supported by the flanges and the elastic material at a predetermined position in the shaping mold; injecting a melted rubber into a space between the roller body and the shaping mold from an injection opening; and curing the melted rubber injected into the space. The roller body holding device for holding a roller body is shaped in a hollow cylinder and includes a flange, which is press-fitted into the roller body from each of end openings of the roller body; and an elastic material disposed between the flange and the roller body.

Abstract: A cylinder for a rotary printing press can be subdivided into a plurality of sections in a first operational mode. In a second operational mode, the cylinder has a functionally continuous outer surface.

Abstract: A elastomer-covered roller (10) is provided with an improved bond coating for bonding the elastomeric cover (14) to the core (11). At least one layer of material (15) is thermally sprayed on the core to form a rough surface having a roughness from 400 microinches Ra to 2000 microinches Ra or greater. In a further improvement a denser, less porous layer (17) may be applied next to the core to protect the core from corrosion, followed by a less dense layer (19) applied to the first layer and having a similarly rough surface (20) for good mechanical bonding.

Abstract: A drum assembly comprises a replaceable sleeve of resilient material supported by a rigid cylindrical mandrel having an air bearing at one end to facilitate loading and removal of the resilient sleeve. The air bearing is provided by a pair of cooperating plates one of which is scored with equally spaced and radially extending slots. When urged together, the plates define a central air chamber and a plurality of radially-extending passages serving to direct pressurized air radially from one end of the mandrel.

Abstract: A method of assembling an idler roll having an outer shell and end bearing assemblies. The bearing assemblies each have an outer race and an inner race. The inner race is press fitted onto a roller shaft to an initial position which is spaced inwardly from a final desired position. The outer shell of the roll is restrained and the shaft is reciprocated along its longitudinal axis to determine the degree of axial movement. The inner race of the bearing assembly is moved from its initial position to its final position as determined by the degree of axial movement.

Abstract: Rollers and cylinders that are useable in rotary printing presses are made using hollow tubular casings having metallic foam cores. The casings and cores are made separately. The cores are then placed inside the casing and the two are secured together in a force-transmitting manner.

Abstract: Roll for the smoothing paper webs and process for producing roll. The roll includes a hard core, and an elastic covering layer arranged on an outside of the hard core. The covering layer includes a radially outer functional layer and a radially inner connecting layer arranged to couple the functional layer to the hard core. The inner connecting layer and the outer functional layer each include a soft matrix material with embedded fibers. The matrix material of the functional layer includes an elastic material with a damping factor of tan &dgr; less than about 0.02 and the matrix material of the connecting layer includes a damping material with a damping factor of tan &dgr; greater than about 0.05. The process includes forming an outer functional layer with an elastic matrix material having a damping factor of tan &dgr; less than about 0.02 and embedded fibers, forming an inner connecting layer with a damping matrix material having a damping factor of tan &dgr; greater than about 0.

Abstract: A conductive roll for an electrophotographic apparatus, which eliminates deposition unevenness onto the roll surface, inhibits occurrence of non-uniform roll resistance value, and gives a satisfactory image free from density unevenness. The surface of the conductive roll is corona-treated by arranging the conductive roll oppositely to, and in parallel with a discharging electrode, and impressing a voltage onto the electrode while rotating the conductive roll. With the conductive roll subjected to a corona treatment of the roll surface, deposition unevenness onto the roll surface is eliminated, a uniform roll resistance value is maintained throughout the entire surface even after use for a long period of time, thus permitting maintenance of stable properties.

Abstract: A method for manufacturing a magnetic roll for use in an electrophotographic printing machine of the type having an electrostatic latent image recorded on a photoconductive member is provided. The method includes the steps of placing a shaft in a mold cavity and molding a core in the mold cavity with the shaft in the cavity. The core defines a pocket on the periphery of the core. The method further includes the step of attaching a magnet to the pocket.

Abstract: A method for fitting a tubular roll shell (2) of a roll (1) in a paper or board machine. In the method, the roll shell (2) is supported on a stationary roll shaft (3) by means of hydrostatic slide bearing elements (4a, 4b; 4a′, 4b′; 5a, 5b; 5a′, 5b′), acting on the roll shell (2) in radially opposite directions, at least in the direction of a plane co-directional with a first plane or a plane parallel to a primary loading (F) and in a plane substantially lateral to a plane co-directional with the primary loading (F). The slide bearing elements (4a, 4b, 4a′, 4b′, 5a, 5b, 5a′, 5b′) are loaded hydraulically by means of a pressure fluid.

Abstract: A brush alignment apparatus and method of using the same for aligning a hollow cylindrical brush on a cylindrical roller member comprising first and second ends and an outer surface defining a internal cavity, provided with a plurality of orifices extending from the outer surface to the internal cavity, a first receptacle having a channel running therethrough in fluid communication with the first end of the roller member, a second receptacle, a spine member, a first support arm supporting the first end of the roller member and a second arm supporting the second end of the roller member.

Abstract: Roller covers and methods for manufacturing such roller covers are disclosed. According to one method, a paint carrying medium is secured to a core material to form a composite material having at least one core layer and a paint-carrying layer, wherein the composite material has opposite edges. The opposite edges are positioned adjacent to one another and are secured together. According to an alternative method, a paint-carrying medium having a backing is provided. The backing is treated to an adhering state and is applied to a core while the backing is in the adhering state. According to yet another method, a paint-carrying medium having a backing including opposite edges is provided. The opposite edges are positioned adjacent to one another and are secured to one another. According to an alternative embodiment, a roller cover includes a paint-carrying medium and a core supporting the paint-carrying medium.

Abstract: Flexible plates are placed on a plate cylinder by inserting leading and trailing plate suspension legs into cooperating slits. Each of the plate suspension legs is pushed into the receiving slit by an insertion device that uses plate front and rear insertion sliders. These two insertion sliders each act as a guide for the adjacent slider.

Abstract: A method and apparatus for making paint roller covers by spirally advancing a thermoplastic tubular form past a plurality of electronic corona discharge heads arranged in a helical path around the tubular form to subject substantially the entire exterior surface of the tubular form to high frequency, high voltage sparks as the tubular form spirally advances past the heads to make substantially the entire exterior surface more receptive to adhesion when a uniform layer of epoxy adhesive is subsequently applied to the treated exterior surface of the tubular form. Next a fabric strip is spirally wrapped over the epoxy adhesive to bond the fabric strip to the tubular form. To make the exterior surface of the tubular form still more receptive to adhesion, the exterior surface may be preheated immediately prior to treating the exterior surface with high voltage sparks.

Abstract: A method of preparing a hearth roll with a coating, including: plating a metal on a ceramic powder by using electroless plating; mixing the metal-plated ceramic powder and a metal powder to form a cement powder; and thermally spraying the cement powder onto a hearth roll. Another method is: plating a metal on a ceramic powder by using electroless plating; mixing the metal-plated ceramic powder, a metal powder, and a binder to form a slurry, and subjecting the slurry to granulating and sintering to obtain a sintered powder; and thermally spraying the sintered powder onto a hearth roll.

Abstract: A system for embossing a substantially continuous web of material including a supply for supplying at least one substantially continuous web of material, feeding the substantially continuous web of material, an embossing device for embossing a predetermined pattern in the web material and a take-up device for taking-up the embossed web material; wherein at least one roll of the system includes an elongated core formed of a substantially rigid material and an elongated sleeve formed of a material less rigid than the elongated core with the elongated sleeve being releasably secured to the core such that the elongated sleeve is axially and circumferentially fixed with respect to the core when in operation and can be selectively axially removed from the core. Preferably, the sleeve includes an embossing pattern laser engraved thereon so as to permit the embossing pattern being run by the system to be readily changed.