Abstract: An electrophotographic development apparatus capable of maintaining the surface roughness of a developer roller thereof for a long term or even for the life span of the apparatus. The developer roller includes an elastic layer, formed on a core metal shaft, and made of a rubber elastic material with additional insulating micro-powder of 30 to 200 parts having a particle diameter in a range of 1 to 50 micrometers, where the amount of the rubber elastic material constitutes 100 parts. During a printing operation, the insulating micro-powder drops from the elastic layer as the rubber elastic material is worn, so that the developer roller can maintain its surface roughness in proportion to the particle diameter of the dropped powder.

Abstract: A method of making a gravure roll disclosed that produces a uniform coating gradient on a substrate. The gravure roll includes a series of cells arranged in circumferential line density sections in which the line densities progressively increase from section to section, and in which the cell volumes progressively decrease within each section, and in which the cell volumes at the end of one section are substantially the same as the cell volumes at the beginning of the next adjacent section.

Abstract: A coated roll and a method for coating a roll used in a paper machine. Desired surface property values of the roll are fed into a central unit of the coating system and the roll is coated while following a function f.sub.1 (x),f.sub.3 (x) created in the central unit over the distance of the length of the roll. A surface hardness and/or surface profile corresponding to the formed function f.sub.1 (x),f.sub.2 (x) is derived which does not have any steps or other points of discontinuity. The roll is coated with a polymer, preferably polyurethane.

Abstract: A winder for winding a continuous traveling web into a wound web roll including a cylindrical winder drum for being in supporting and driving relationship to a roll wound from a continuous web, a covering layer on the drum having a compliant surface with an outer surface pattern providing a series of recesses and land areas which in some preferred forms are non-uniform in shape and non-uniform in spacing but may be circular or elliptical or other defined shape within a range of sizes, spacing and a range of surface land area contact with the web and roll for reducing noise and improving tension in high speed winders.

Abstract: The center roll in the paper machine is made of a ceramic or metal-ceramic basic material. At least one portion of the center roll is coated or soaked with a polymer coating in order to obtain the desired adhesion properties of the face of the center roll.

Abstract: A recording medium transport mechanism has first rotary members provided downstream of a recording area in the direction of transport of a recording medium and on the side of a recording surface of the recording medium, and a second rotary member provided downstream of the recording area and on the side opposite from the recording surface side of the recording medium to guide the recording medium in association with the first rotary members to discharge the recording medium out of the recording area, the second rotary member including a liquid absorbing member provided on its circumferential surface portions and capable of contacting the first rotary members. This recording medium transport mechanism is used in an ink jet recording apparatus to prevent a contamination on the surface of a recording medium opposite from the recording surface side.

Abstract: An apparatus for producing a fissured, acoustical ceiling panel wherein the pins used to fissure the panel are roll applied thereto. The pins are embedded in flexible, resilient polymeric plates, and a plurality of the plates are attached to a rotary drum which is used to apply the fissuring pins to the surface of the panel. The invention also includes the method for manufacturing the polymeric plates which are molded and formed with the fissuring pins embedded therein.

Abstract: A roller assembly for use in an electrostatographic development apparatus to transport developer material through a development zone. The roller assembly includes end cap sections for mounting rotatably to a housing of the development apparatus, and a spincasted sleeve section interconnecting the end cap sections. The spincasted sleeve section includes an outer layer that has a series of non-radial undercuts formed thereinto for retaining developer material being transported. In order to achieve consistent precision at relatively lower costs, the sleeve section is produced by spincasting a desired quantity of filled thermoset material in a simple reusable silicone mold formed and held in a mud frame.

Abstract: A method of fabricating a lightweight ink transfer roll adapted for use in a flexographic printing apparatus. The roll comprises an aluminum body member having a cylindrical outer surface, tubular opposite end portions, and a solid medial portion which forms a mid span stiffener in the roll. An aluminum header is fixed in each of the tubular end portions, and each of the headers has an inner end surface which is spaced from the solid medial portion of the body member so as to leave an open void therebetween. An outer covering layer, of for example aluminum oxide or a flame sprayed ceramic, overlies the outer cylindrical surface of the body member, and a plurality of ink metering cells are formed in the outer covering layer. In one embodiment the method of fabricating the roll includes the steps of removing material from each of the ends of a metallic solid base roll so as to form tubular opposite end portions, and assembling a header in each of the tubular opposite end portions.

Abstract: According to the present invention, a feeding mechanism comprises feeding members to contact with a recording medium and exert a feeding force to the recording medium, holding portions for holding the feeding members in predetermined positions, and a shaft rotatively supported axially at both ends thereof. At least one portion of the shaft is in a tapering configuration to make its end side portion thinner, hence facilitating the mounting of the feeding member while maintaining the strength of the shaft member. The present invention is also directed to a recording apparatus including such a feeding mechanism.

Abstract: A veneer dehydrating apparatus is disclosed which is intended to squeeze out part of water contained in green softwood veneer. The apparatus includes a pair of parallel rolls assemblies rotatable in opposite directions and disposed one above the other to be spaced apart from each other thereby to define an open nip between the circumferential peripheries thereof, and a conveyer for feeding successively sheets of green softwood veneer with the fiber orientation thereof directed along the feeding direction into said nip. One of the roll assemblies has formed on the peripheral surface thereof a number of individual projections pierceable into said veneer sheet at the nip. Each projection has a pyramidal shape with N faces, wherein N represents an integral number of four or more.

Abstract: A series of wood graining tools for producing wood grain patterns corresponding to plain sawn, quarter sawn and/or rotary cut woods, on an application surface. The plain sawn tool presents a graining pattern having a plurality of crown-shaped embossed ribs thereon. Each rib is formed by utilizing a series of rib arcs with lateral ribs extending therefrom at a preferred angle of 40.degree. to 50.degree. relative to the horizontal. The quarter sawn pattern presents a series of embossed ribs diagonally extending across the pattern and decreasing in density from one corner of the panel to the center thereof. A rotary cut pattern is presented by first and second arcuate ribs positioned so that one rib will channel the graining liquid to the other to produce a ring on the application surface during rolling movement of the tool.

Abstract: A web transporting device usable in a rotary printing press or folder, includes a rotatably driven transport roller having a fixed axis and at least one engagable nip roller having an axis substantially parallel to the fixed axis and being engagable with the driven transport roller. The engagable nip roller has a length corresponding to a maximum width of the web processable in the printing press. A removable nip sleeve is provided which is axially mounted on the engagable nip roller. The removable nip sleeve has an least one ring-shaped annular gap disposed axially along its length which allows the web to ripple as it passes through the web transporting device without causing permanent wrinkles or creases to form in the web. A counterbalancing mechanism is also provided which stabilizes the engagable nip roller in a maintenance position as the removable nip sleeve is replaced.

Abstract: A method of making a strip product having a surface that is both bright and clean after being rolled by work rolls in a roll stand. The work rolls are polished to remove grind lines from the roll surfaces, and the roll surfaces are provided with minute, ovoid depressions having relatively shallow slopes extending in the direction of rolling, followed by steeper slopes at the opposite ends of the depressions. The depressions are created by a laser beam directed against the roll surfaces at oblique incidence to the roll surface normal during relative movement of the beam and roll surfaces. The roll surfaces are then polished to remove any roll material that is raised above the nominal surface of the rolls, the raised material being the result of melting of the roll surfaces and the deposition of roll material vaporized by the laser beam.

Abstract: The invention relates to a method for coating a center roll used in a press of a paper machine and a center roll in the paper machine. The center roll in the paper machine is made of a ceramic or metal-ceramic basic material. At least one portion of the center roll is coated or soaked with a polymer coating in order to obtain a desired adhesion properties of the face of the center roll.

Abstract: In a fixing device, a core material of a fixing rotating member has two largest-diameter portions respectively located between a central portion and each end portion of the fixing rotating member, within a region where a recording material of a largest size passes, and the diameter of each core material is gradually reduced from the largest-diameter portion toward the central portion and toward the nearest end portion. The outer shape of the fixing rotating member conforms to the shape of the core material. According to this configuration, it is possible to prevent corrugation and curl of the recording material, and to provide excellent mountability of the recording material.

Abstract: An apparatus for producing apertured non-woven fabric which includes a cylindrical support having both a plurality of specially formed projections and a plurality of drainage holes in and around said projections.

Abstract: A paint roller structure is arranged to paint in an enclosed manner pipes, parallelepiped picket fence members, wrought iron rods, and the like. The device includes a roller structure having a recess oriented medially of the roller and concentric of the roller to accommodate the workpiece, such as a pipe and the like. Various recess shapes, such as arcuate, square, and rectangular may be provided in accordance with the selected workpiece shape.

Abstract: A lightweight ink transfer roll adapted for use in a flexographic printing apparatus. The roll includes an aluminum body member having a cylindrical outer surface, tubular opposite end portions, and a solid medial portion which forms a mid span stiffener in the roll. An aluminum header is fixed in each of the tubular end portions, and each of the headers has an inner end surface which is spaced from the solid medial portion of the body member so as to leave an open void therebetween. An outer covering layer, of for example aluminum oxide or a flame sprayed ceramic, overlies the outer cylindrical surface of the body member, and a plurality of ink metering cells are formed in the outer covering layer. Preferred methods of fabricating the roll are also disclosed.

Abstract: A method of producing an embossing cylinder having a predetermined embossed pattern thereon by applying a screen having a pattern inscribed therein to the surface of the cylinder, applying a hardenable material over the screen and pressing the hardenable material through the screen onto the surface of the cylinder, and removing the screen and allowing the hardenable material to harden to form an embossed pattern of hardened material on the surface of the cylinder.

Abstract: A roll for hot dipping bath includes at its outer peripheral surface at least one spiral groove for the discharge of dross. In this roll, the outer peripheral surface existing between the adjoining groove portions includes a rough surface, capable of applying a molten metal composition to a sheet of metal without transferring a groove mark to the sheet.

Abstract: A method and apparatus for space dyeing a plurality of strands of yarns which are fed over a series of dye applicator rolls. Each roll is rotated in a partly submerged condition in a dye pan containing a different color. Above and offset relative to each dye applicator roll is a yarn pattern roll which carries a number of slats in a circumferential array extending beyond the periphery of the pattern rolls for contacting the yarn strands. The slats sequentially engage and deflect the yarn strands onto the surface of the respective dye applicator rolls. The slats may be positioned in selected slots in the pattern rolls to determine the pattern of color applied to the yarn. Variable speed drives rotate the dye applicator rolls and the pattern rolls independently of each other to effect the spacing of the colors and the amount of dye received by the yarn strands.

Abstract: A roll stamper used in a process of continuously forming a uniform sheet of a resin from which information recording medium bases are obtained. This roll stamper has a stamper member having in its surface a pattern corresponding to a pre-format pattern of an information recording medium, fixing members fixed on opposite end portions of a reverse surface of the stamper member so as to be integral with the stamper member, and a specular roll base having an engagement groove formed in its circumferential surface parallel to its axis. The stamper member is fixed on the specular roll base by fitting the fixing members in the engagement groove. A recess formed in a circumferential surface of the roll stamper as a gap between the fixing members is filled with a filler so that the roll stamper circumferential surface is substantially smooth. Side surfaces of the fixing members and/or the engagement groove are shaped as to suitably retain the filler.

Abstract: An improved surface casing for a sheet-guiding printing cylinder comprising a number of elevations having constant cross-sectional areas extending radially therefrom to form a sheet bearing surface. The constant cross-sectional area over the length of the elevations ensures that as the elevations are worn down over time, the overall bearing area does not increase. As a result, smearing of the printing image, which is related to the total bearing area, does not increase over time. Additionally, the total bearing area does not increase for sheets having a low paper weight due to sagging of the sheet between the elevations.

Abstract: A method of manufacturing an insulated furnace roller includes providing the roller with an insulating refractory castable between the spaced apart tires of the roller and between the outermost tires and the furnace walls, the castable being secured to an arbor of the roller by metal anchors having outer ends that terminate inwardly of the outer surface of the castable, and wherein between the tires and the castable spacer discs are provided and between openings formed by the discs and tires insulation is inserted, the arbor being also wrapped with insulation before the castable is formed on the arbor.

Abstract: An annealing roll for transferring steel strips from an annealing furnace has several spaced rings along the body of the roll. The rings have a width and diameter chosen such that the load on each ring is optimized depending upon the material of the strip and the ring material. The selected ring material is relatively insoluble with the strip material.

Abstract: To provide a paper guide roller on which freshly printed ink does not smear while, still, the roller has a surface which is sufficiently rough so that it can be rotated by frictional engagement with a paper web passing thereover, the roller is formed with a base body, typically of steel or cast iron, on which a jacket (3) is placed. In accordance with the present invention, the jacket (3) has two layers, a first layer (4) of ultra-high molecular plastic material, for example polyethylene or polytetrafluorothylene, and a second layer (5) thereover, which has glass balls or beads (6) mixed therein. The material of the second layer can be the same as the first, or different; the glass balls or beads project by a distance of about 20% of their diameter from the second layer. A suitable thickness for the first layer is about 0.3 mm, and the glass balls or beads may have diameters of between 0.2 to 1 mm.

Abstract: An improved combing or opening roll assembly for open-end spinning machines includes means for cleaning the inner cavities by direct axial injection of compressed air into the cavity, and an outer surface configuration designed to inhibit or prevent accumulation of microdust and fibers thereon. One outer surface of the roller unit includes a color-coded speed indicating means which enables an operator immediately to visualize the relative speed of rotation, as a safety factor decreasing the likelihood that an operator would inadvertently touch the combing ring during rotation.

Abstract: A composite friction feed roll includes one material which feeds fresh paper well and another material which reliably feeds paper which has passed through fusing and has oil on its imaged surface. Such a roll will feed deplex and fresh paper or inserts equally reliably. Suitable material combinations would be silicone rubber which handles fused copies with ease, but has limited life feeding fresh or virgin paper because it collects fibers from fresh paper, and isoprene which is long lived handling fresh paper, but is rapidly contaminated by fuser oil. In the steady state condition, silicone regions will be primarily active in feeding duplexed paper while the isoprene oil contaminated, while in the plain paper feeding case, isoprene regions will be primarily responsible for feeding while the silicone becomes paper debris contaminated.

Abstract: A veneer dehydrating apparatus is disclosed. The apparatus includes a pair of rolls disposed so as to form a nip between the peripheries thereof through which a green veneer sheet is passed. At least one of the rolls has on its periphery a number of tooth-like projections separated from one another by grooves formed on the roll periphery. Each projection is pierceable into a veneer sheet to squeeze out part of water contained in the veneer sheet by compression exerted thereto by the projection piercing thereinto. The toothed roll has an elastic filler member fitted round the roll so as to fill the spaces between the projection. The elastic filler member comprises an elastic portion made of, e.g., sponge rubber and a reinforcement portion made of, e.g., fabric and secured to one surface of the elastic portion and seated firmly against the radially innermost surface of the grooves.

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: To facilitate the manufacture of an anilox roller for an inker of an offset rotary printing machine, a cylindrical core has a layer of ink accepting material, for example copper, applied thereon. To form wear-resistant ribs (8) between which ink receptor depressions or cells (19) can be formed, the layer (3) of ink accepting material is formed with grooves into which a hard, wear-resistant material is applied, completely filling the grooves. The ink receptor depressions or cells are then formed in the ink accepting material, which is softer than said wear-resistant material. The thickness of the ink accepting layer (3) originally applied is greater than the depth of the cells which, typically, have a depth of about 0.02 mm.

Abstract: A roller for a printing machine is formed having oleophilic metal cells and hydrophilic ceramic cross pieces. The ceramic material is applied to the outer surface and is then ground away to again expose the metal. An upper portion of the metal is then removed to leave the elevated hydrophilic ceramic cross pieces.

Abstract: An expander roller for running webs of paper, textile material or the like has a straight metallic or plastic core and an outer layer consisting of two helically convoluted strips of rubber or other elastomeric material. The two convoluted webs are mirror images of each other with reference to a plane which extends between them and is normal to the axis of the core. The external surface of the outer layer is profiled in that it is provided with grooves cut into or otherwise formed in the strips and forming helices as a result of convolution of the respective strips onto the core. Each helical groove is adjacent a deformable lip which defines a portion of the external surface of the outer layer and can yield in response to engagement with a running web. The strips are permanently or detachably bonded to the peripheral surface of the core.

Abstract: A device for dosing coating substances onto a travelling web. A doctor roll has circumferential grooves which are separated from each other by lands. Each of the lands has a surface parallel to the center axis of the roll when viewed in the direction of the center axis. The respective widths of the lands, viewed in the center axis direction, maximally equal the maximum width of the cross section of the circumferential grooves.