Roller Making Patents (Class 29/895)
  • Patent number: 9429207
    Abstract: A steel base material (11) is subjected to a quenching step, a machining step, a plating step, and a tempering step to form a rod (4). In the quenching step, two axially spaced portions of the steel base material are quenched to form quenched portions (12 and 13). In the machining step, plastic working or cutting is performed on a portion of the steel base material between the two quenched portions to form a full-circumferential groove (4C1) in a machined portion 4C. In the plating step, the quenched portion (12) is not plated, but a region of the steel base material including the quenched portion (13) is plated to form a coating layer (16). In the tempering step, the quenched portions are tempered.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: August 30, 2016
    Inventors: Yuichi Kobayashi, Takeshi Murakami
  • Patent number: 8991050
    Abstract: The present invention describes a method for manufacturing rotogravure cylinders with a cylinder base made of a light weight material like aluminum. The method involves the surface treatment of the cylinder with mechanical means, the copper plating in an appropriate solution, the engraving of the cylinder, and the hardening of the cylinder by chromium plating. The advantage of this method is that the chemical treatment for the preparation of the cylinder surface which generates hazardous waste is replaced by a mechanical process. In addition, the reduction of the cylinder weight considerably (e.g. for aluminum base cylinder the weight reduction is two thirds of the weight of a steel base cylinder) reduces significantly the transportation costs. Moreover, the adhesion of the copper layer to be engraved is improved and the cost and time of manufacturing reduced.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: March 31, 2015
    Assignee: Artio SARL
    Inventor: Ioannis Ioannou
  • Patent number: 8973304
    Abstract: A holding jig (1, 2, 3) for a thin cylindrical work (W) includes a holding member (10, 10A, 10B) which holds the work (W) from an inner peripheral side and a diameter changing unit (25, 27) which changes a diameter of the holding member (10, 10A, 10B). The holding member (10, 10A, 10B) is made of metal and has a cylindrical shape and an elastically expandable or contractible diameter. The holding member (10, 10A, 10B) is configured with an outside diameter of the holding member (10, 10A, 10B) being held smaller than an inside diameter of the work (W) at the time of insertion into an inner periphery of the work (W) and being expanded after inserted into the inner periphery of the work (W) to hold the work (W) from an inner peripheral side of the work (W) with an outer peripheral surface in close contact with an entire inner peripheral surface of the work (W).
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: March 10, 2015
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Takayoshi Sano, Tadamasa Furuya
  • Patent number: 8966761
    Abstract: A method for controlled installation of a brush filament population on a shaft for making a toner adder brush roller includes applying a layer of adhesive over a surface of a roller shaft, applying a template over at least a portion of the shaft surface, and flocking a multiplicity of filaments on the shaft surface to provide a brush on the roller shaft having a filament population controlled by the application of the template. The method also includes removing the template from the shaft surface after flocking the multiplicity of filaments such that a set of filaments less than the multiplicity of filaments is removed with the template. The method further includes flocking additional filaments on the portion of the shaft surface after removing the template from the portion of the shaft surface, the additional filaments differs from said previously flocked filaments in one of material, length, denier, or combinations of the foregoing.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 3, 2015
    Assignee: Lexmark International, Inc.
    Inventors: Jenny Marie Berens, Leea Danielle Haarz, Edwina Floyd Lowry, Kathryn Dowlen Mullins
  • Patent number: 8874012
    Abstract: A high quality developing member that is excellent in deformation recovery property under a high temperature and that also satisfies filming resistance under a low temperature is provided. The developing member of the present invention includes a mandrel, an elastic layer formed on the outer periphery surface of the mandrel, and a surface layer covering the outer periphery surface of the elastic layer, wherein the surface layer contains a first resin and a second resin, the first resin has a particular structure between adjacent two urethane linkages, and the second resin is a resin having a particular structure and having a glass transition point Tg of 20° C. or higher and 120° C. or lower.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: October 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Yamada, Yuji Sakurai, Toru Ishii, Takashi Koyanagi
  • Publication number: 20140166430
    Abstract: A conveyor roller includes a roller body that defines a fill cavity. A concrete material at least partially fills the fill cavity in the roller body. A bearing assembly is coupled to the roller body. The bearing assembly is configured to facilitate rotation of the roller body. The roller body acts as a mold to allow curing of the concrete material to occur even after final assembly of the conveyor roller. In one example of the manufacturing method, the concrete material is poured into one or more fill cavities inside the roller body, and bearing assemblies are attached to the opposite ends of the roller body. The concrete material can continue to cure even after the bearing assemblies are attached. In one example, the bearing assemblies act as plugs, thereby sealing the concrete material within the fill cavities of the roller body.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 19, 2014
    Applicant: Bastian Solutions, LLC
    Inventors: William A. Bastian, II, Britt Calloway
  • Publication number: 20140128232
    Abstract: A method for processing a roll includes providing a roll comprising an axis of rotation, providing at least one pulling device, and bending the roll in a direction opposite to a curvature of the roll via the at least one pulling device. The at least one pulling device is disposed at a radial distance from the axis of rotation of the roll.
    Type: Application
    Filed: December 9, 2011
    Publication date: May 8, 2014
    Inventors: Klaus Kubik, Andre Huennekens
  • Publication number: 20140116093
    Abstract: A disc roll includes a plurality of annular disc members each defining a hole and having a peripheral surface; and a rotary shaft fitted into the holes of the annular disc members by insertion, whereby the peripheral surfaces of the disc members serve as a conveying surface of the disc roll. The disc members include an inorganic fiber, mica and a clay having a content of particle components that have a particle size of 5 ?m or larger of not higher than 30% by weight based on the weight of the clay.
    Type: Application
    Filed: January 2, 2014
    Publication date: May 1, 2014
    Applicant: Nichias Corporation
    Inventors: Masaaki Nakayama, Daiji Tahara, Masafumi Igo
  • Publication number: 20140013815
    Abstract: A method for manufacturing a roll for reducing rolling capable of suppressing the occurrence of fin flaws and edge flaws includes preparing a roll for reducing rolling for use on a three-roll type reducing-rolling mill. A ridge part (52) is formed in the adjacent portion between a caliber part and a flange part is rounded by cutting the ridge part (52) while rotating the roll for reducing rolling around the roll axis. In rounding the ridge part, in a ridge part region (RA52) within the range of 3.0 mm in a roll axis direction with the top of the ridge part (52) being the center, the average of radiuses of curvature measured at a 0.5 mm pitch is made in the range of 2.5 to 3.0 mm, and the difference between the maximum value and the minimum value of the radiuses of curvature is made at most 1.0 mm.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 16, 2014
    Inventor: Ryutaro Ogata
  • Patent number: 8600273
    Abstract: A developing roller including a mandrel, an elastic layer provided on the mandrel and containing a cured material of an addition curable-type dimethyl silicone rubber, and a surface layer containing a urethane resin that covers the circumferential surface of the elastic layer. The urethane resin has a structure represented by the following formula (1), and one or both structures selected from a structure represented by the following formula (2) and a structure represented by the following formula (3) between two adjacent urethane linkages.
    Type: Grant
    Filed: April 3, 2012
    Date of Patent: December 3, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Yamada, Takashi Kusaba, Kunimasa Kawamura, Yuji Sakurai, Toru Ishii
  • Publication number: 20130316771
    Abstract: A method of manufacturing cracker roller discs comprises forming a disc blanks and machining to produce the final form. The disc blank has an axial bore through the centre, a first portion radially outward of the centre of substantially constant thickness, a second portion radially outward of the first portion which second portion tapers towards the periphery of the disc blank, and a plurality of upstanding ridges extending radially outward across the second portion on opposed faces of the disc. Machining, suitably by turning on a lathe, removes the top part of each ridge and leaves at least one sharp edge extending along it, with all ridges on a face being machined in a single operation.
    Type: Application
    Filed: May 24, 2013
    Publication date: November 28, 2013
    Applicant: AGCO International GmbH
    Inventor: Benjamin Frommelt
  • Publication number: 20130255343
    Abstract: A drive shaft for transmitting motion to a roll of a tube rolling stand comprising a telescopic body, a slide and a support base. The telescopic body is fixed by one end with a cardan joint to the drive shaft of the gearbox, and on the other end has a fitting for attaching the roll. The slide is hinged to the support base and may rotate under the bias of a jack to either engage or release the telescopic body. A snap-action locking device, contained within the telescopic body, comprises a cylinder, on which two rocker arms are hinged, and a spring which spreads the rocker arms making the two teeth fit into two holes in the wall of the cylinder, when the drive shaft is at its maximum working length. The carriage has two pistons to work on the two rocker arms thus freeing the locking device and allowing the telescopic sliding of the cylinder in the cylinder and the downward rotation of the drive shaft.
    Type: Application
    Filed: April 2, 2013
    Publication date: October 3, 2013
  • Patent number: 8533953
    Abstract: This invention provides a process for producing a conductive rubber roller having small aspect ratios of inner and outer diameters, having a stable measure of its inner diameter, having uniform cell distribution and being free from non-uniformity of hardness and electrical resistance in the peripheral direction. The process has a step of continuously extruding a tube composed of a specific unvulcanized rubber composition from a rubber extruder in a microwave vulcanizing unit, and a step of foaming and vulcanizing the tube by using a microwave irradiator having a microwave irradiation zone 4 m or less in length while being transported at given speed. The foamed rubber tube has an inner diameter 20 to 35% smaller than the outer diameter of the conductive core material over the whole region in the lengthwise direction, and the conductive core material is press-fitted into the foamed rubber tube without using any adhesive.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: September 17, 2013
    Assignee: Canon Kasei Kabushiki Kaisha
    Inventors: Hiroshi Imasaka, Satoshi Fukuzawa, Mitsuru Okuda, Erika Umeki
  • Patent number: 8491452
    Abstract: Pressure rolls for apparatuses useful in printing, apparatuses useful in printing and methods of making pressure rolls are provided. An exemplary embodiment of a pressure roll for an apparatus useful in printing includes a first layer including silicone rubber, the first layer including a first outer surface, a first end face and an opposite second end face; a second layer including a polymer overlying the first layer, the second layer including a second outer surface, a third end face and an opposite fourth end face; and a sealing material bonded to and covering the first, second, third and fourth end faces. The sealing material includes a polymer that is impervious to, and chemically resistant to, a release agent comprising silicone oil.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: July 23, 2013
    Assignee: Xerox Corporation
    Inventor: Martin Franklin Zess
  • Patent number: 8448336
    Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: May 28, 2013
    Assignee: Lexmark International, Inc.
    Inventors: Jane Elece Barcelo, Bradley Leonard Beach, Liam Ruan De Paor, Mark Duane Foster, Terence Edward Franey, Bhaskar Gopalanarayanan, Kevin Scott Kennedy, Kelly Ann Killeen, Chao Li, Jean Marie Massie, Ronald Lloyd Roe, Richard Nicholas Schrantz, Jr., Scott Alan Searls, Robert Francis Soto, Donald Wayne Stafford
  • Patent number: 8407896
    Abstract: A system and method for reducing roller skew, which involve ascertaining first and second thrust load properties applied to a roller while a rotary body rotates in opposing rotational directions, and adjusting an orientation of at least one bearing assembly for the roller until an amplitude difference between the first and second thrust load properties is below a predetermined threshold.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: April 2, 2013
    Assignee: Phillips Kiln Services Ltd.
    Inventor: Walter M. Gebhart
  • Patent number: 8376922
    Abstract: A conductive roller such as a developing roller, a charging roller or the like provided with a resin coating layer on a surface of an elastic layer, and more particularly to a conductive roller having the resin coating layer using an ultraviolet-curing type resin or an electron beam curing type resin and being obtained by contriving a structure of the resin coating layer, rendering the resin coating layer to contain microparticles, controlling the particle size of the microparticles, or forming the resin coating layer after the outer peripheral surface of the elastic layer is subjected to surface treatment.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: February 19, 2013
    Assignee: Bridgestone Corporation
    Inventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Hikaru Ishikawa, Junji Sakata, Koji Takagi, Takayuki Sugimura
  • Publication number: 20130023393
    Abstract: A description is given of a method for producing a wear-resistant roller for crushing of particulate material, such as crude ore for use in the mineral industry, by which method the surface region of the roller (1) is provided with a plurality of recesses (2) into each of which a wear-resistant component (3) is embedded. The method is characterized in that at least some of the material around each recess (2) is plastically deformed after the wear-resistant component (3) is placed in the recess and in that the deformed material changes the shape of the recess (2) and secures the wear-resistant component (3) to the roller (1).
    Type: Application
    Filed: March 14, 2011
    Publication date: January 24, 2013
    Applicant: FLSMIDTH A/S
    Inventor: David Dam Olsson
  • Patent number: 8336184
    Abstract: A device capable of smoothly, easily and automatically installing a molding on a door panel for an automobile is provided and includes a molding installation jig and a dynamic sensor located between a jig body and an arm. The dynamic sensor is designed to detect a force applied from the molding installation jig to the molding. A finger is supported on a side of the jig body to contact and hold an end section of the molding. Three suction pads, which communicate with a vacuum device, are provided on a surface of the jig body at equal intervals. A pair of brackets having a C-shaped cross section are provided on a side surface of the jig body, which is perpendicular to the surface on which the suction pads are provided. A first roller, a second roller, and a third roller 19 are rotatably supported in each of the brackets.
    Type: Grant
    Filed: June 14, 2010
    Date of Patent: December 25, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Tatsuhiko Yamamoto, Takahiro Yogoro
  • Publication number: 20120311861
    Abstract: A manufacturing method of a roller used for manufacturing a patterned retardation film is provided. The manufacturing method includes the following steps. A roller having a rotational axis and a roller surface is provided. An engraving device having an engraving end is provided. The engraving end has a plurality of sub-micron slots which are constructed in parallel with each other. The engraving device engraves the roller surface with a first depth to form a plurality of first sub-micron grooves. The engraving device engraves the roller surface with a second depth to form a plurality of second sub-micron grooves.
    Type: Application
    Filed: December 8, 2011
    Publication date: December 13, 2012
    Inventors: Fung-Hsu Wu, Lung-Hai Wu
  • Publication number: 20120285018
    Abstract: A workpiece is fixed by a retracting mechanical chuck mounted on a spindle head of a five-axis control machining center. The apparent outer diameter of the workpiece is increased by a jig. Clamp surfaces of the jaws and a support surface of the jig are formed on the machining center. A cutting tool is mounted on a spindle by an automatic tool exchanger. The workpiece is rotated about an axis to grind an end surface of the workpiece to approximately a predetermined target shape, which is a spherical surface. A grinder is then mounted on the spindle by the automatic tool exchanger, and the grinder is set relative to the workpiece by five-axis control such that the inclination angle, the offset amount, etc. satisfy a predetermined relationship according to the desired grinding. The grinder is then fed in the Z-axis direction to form the spherical surface by grinding.
    Type: Application
    Filed: January 21, 2011
    Publication date: November 15, 2012
    Inventors: Kohei Higashi, Satoshi Sugitatsu
  • Patent number: 8296950
    Abstract: Provided is a method of stabilizing an elastomeric property of an elastomeric material. The method includes placing the elastomeric material in a pressurizing chamber and applying a suitable hydrostatic pressure to the elastomeric material within the pressurizing chamber to at least partially compress the elastomeric material. Application of the hydrostatic pressure is maintained for a period of time suitable to at least partially stabilize a restorative force exhibited by the elastomeric material in response to subsequent exposures of the elastomeric material to a compressive force.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: October 30, 2012
    Assignee: Codonics, Inc.
    Inventors: Robb Colbrunn, Scott Turk, Christopher Tainer, Pete Botten, Eric Lehuta, Lawrence Srnka
  • Patent number: 8261448
    Abstract: A method of making sheet glass using a pulling roll comprised of a high-temperature millboard material. The millboard comprises aluminosilicate refractory fiber, silicate, mica, and kaolin clay. A method of manufacturing a pulling roll is disclosed, together with a roll produced by the methods disclosed herein. The method comprises forming a pulling roll and densifying at least a portion of the pulling roll by exposing to the pulling roll to high temperatures.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: September 11, 2012
    Assignee: Corning Incorporated
    Inventors: Dean Veral Neubauer, Maurice Lacasse
  • Patent number: 8182405
    Abstract: A developing roller is provided which supplies a toner to a photosensitive member to develop an electrostatic latent image formed on the photosensitive member. The developing roller has a surface layer which includes carbon black and a polyurethane resin. The polyurethane resin has a specific structure. The surface layer has a specific ester group concentration and a specific urethane group concentration.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: May 22, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Kurachi, Masaki Yamada, Yuji Sakurai, Minoru Nakamura
  • Publication number: 20120048976
    Abstract: The present invention provides a pressure roller for use in semi-autogenous comminution of maters. The roller has an outer face (11) accommodating a set of wear resistance inserts (13) in a spaced array over the outer face. The inserts are embedded in the surface of the roller and extend into an outer section of the roller. Each insert is spaced inwardly from or is flush with the outer face of the roller.
    Type: Application
    Filed: April 20, 2010
    Publication date: March 1, 2012
    Inventors: Erich John Hofmann, Karl Peter Steiner
  • Patent number: 8083657
    Abstract: A deflection compensating roller including a rotating roller casing, a rotationally fixed yoke axially extending through the roller casing, at least one hydrostatic support device arranged between the yoke and the roller casing, the at least one hydrostatic support device comprising a pressure compartment and at least one oil pocket that communicates with the pressure compartment via at least one first restricted flow zone and at least one second restricted flow zone, and a fluid comprising at least one of an electrorheological fluid (ERF) and a ferro fluid. A viscosity of the fluid is adapted to be varied by way of one of an electric and magnetic field. This abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: July 18, 2005
    Date of Patent: December 27, 2011
    Assignee: Voith Patent GmbH
    Inventor: Rolf Van Haag
  • Patent number: 8050601
    Abstract: Exemplary embodiments provide a roll member that includes one or more piezoelectric tape and methods for making and using the roll member. The piezoelectric tape can be flexible and include a plurality of piezoelectric elements configured in a manner that the piezoelectric elements can be addressed individually or as groups with various numbers of elements in each group. In an exemplary embodiment, the disclosed roll member can be used as a donor roll for a development system of an electrophotographic printing machine to create controlled and desired toner powder cloud for high quality image development, such as an image on image development in a hybrid scavengeless development (HSD) system.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: November 1, 2011
    Assignees: Xerox Corporation, Palo Alto Research Center Incorporated
    Inventors: Pinyen Lin, Baomin Xu, Lalit K. Mestha
  • Patent number: 8037607
    Abstract: A process for producing a conductive rubber roller having a conductive core material and a rubber layer provided thereon. The rubber layer contains at least acrylonitrile rubber, epichlorohydrin rubber and a blowing agent, and has a gas generation rate of from 2 ml/g·min to 4 ml/g·min at 170° C. to 230° C. The process has a vulcanizing and foaming step of vulcanizing and foaming the rubber layer by using a microwave vulcanizing furnace which provides hot air and irradiation with microwaves. A temperature of a heating atmosphere in the microwave vulcanizing furnace in the vulcanizing and foaming step is so controlled that a ratio of initial vulcanizing time T10 to initial foaming time Tp10, T10/Tp10, of the rubber layer is from 1 or more to less than 3 and the T10 is within 90 seconds.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: October 18, 2011
    Assignee: Canon Kasei Kabushiki Kaisha
    Inventors: Hiroshi Imasaka, Satoshi Fukuzawa, Mitsuru Okuda, Erika Umeki
  • Patent number: 8016733
    Abstract: A novel paint roller “cage” having improved tracking and ease of use is adapted for receiving different length axle shafts of various sizes of paint roller frames. An outer tubular support, upon which a paint roller cover or other paint absorbing material may be mounted, contains a pair of support bearings secured at either end of an inner tubular chassis, with one support bearing at a first end of the outer tubular support, and the other support bearing at approximately its mid point. The two support bearings are connected by an inner tubular chassis, which both maintains the two bearings at a desired axial spacing and also holds the walls and radial bearing surfaces of a bushing chamber that is integrally molded with each support bearing in proper position about a tubular bushing that is adapted to be frictionally secured to the axle shaft. In one embodiment, the outer tubular support has a diameter of about 1? and a length of about 9?, and can be used with both 6.5? and 9? roller frames.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: September 13, 2011
    Inventor: Song Kim
  • Publication number: 20110158835
    Abstract: A roller lifter including a roller that is rotatably supported and a body that supports the roller, the body including: a base portion in the form of a flat plate; a roller holding portion in the form of a pair of opposing plate-shaped portions that are formed by bending towards one of plate surfaces of the base portion, the roller holding portion being configured to hold the roller between the plate-shaped portions; and a guide portion in the form of a plate-shaped portion formed by bending towards the other one of the plate surfaces of the base portion and also formed by curving so that the plate-shaped portion follows a cylindrical surface shape in which a direction perpendicular to the plate surface of the base portion is the axial direction of the cylinder, the guide portion being configured to form a guide surface in a shape that follows the cylindrical surface shape.
    Type: Application
    Filed: September 2, 2009
    Publication date: June 30, 2011
    Inventors: Takeyuki Yabuuchi, Takashi Usui
  • Publication number: 20110142501
    Abstract: A development roller, including a development sleeve disposed near a photo conductive drum, a magnetic roller disposed in the development sleeve, and a supplying device configured to supply a developer including a toner and a magnetic carrier to the photo conductive drum uniformly, the development sleeve having an outer surface on which the developer including the toner and the magnetic carrier is adsorbed by a magnetic force of the magnetic roller.
    Type: Application
    Filed: February 18, 2011
    Publication date: June 16, 2011
    Inventors: Noriyuki Kamiya, Tsuyoshi Imamura, Sumio Kamoi, Kyohta Koetsuka, Yoshiyuki Takano, Mieko Terashima, Satoshi Terashima, Hiroya Abe, Shigeharu Nakamura, Masaki Watanabe
  • Patent number: 7958637
    Abstract: A shaft is held in place within a bore of a housing with a band of resilient material that is located between the shaft and the housing and has a series of projections extending radially inwards. The shaft surface has a first part that lies closer to the longitudinal axis of the bore than a second part, when the shaft and housing are assembled. The shaft is initially inserted into the resilient band, which is held within the bore, such that the first part of the shaft surface is oriented towards one of the projections of the resilient band. In this orientation of the shaft, the projection is not compressed. By orienting the second part of the shaft surface, the projection is brought under compression and the shaft is held firmly within the bore.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: June 14, 2011
    Assignee: Saint-Gobain Performance Plastics Rencol Limited
    Inventor: Simon Alan Hughes
  • Patent number: 7934316
    Abstract: An object of the present invention is to provide a charging roller (i) which includes a rubber member whose surface is subjected to a hardening treatment using a solvent containing at least an isocyanate compound and (ii) which can prevent leakage of an ionic conductive agent even if the charging roller is placed under conditions of high temperature and high humidity for a long time. The charging roller is made by forming a rubber layer on a metal core. The rubber layer is an epichlorohydrin based rubber base material to which an ionic conductive agent is added, the rubber layer being subjected to a surface treatment by applying a solution containing the isocyanate compound and heating it. This surface treatment is carried out under such conditions that a coefficient of dynamic friction at a contact portion between the rubber layer and a photoreceptor becomes 0.4 or less.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: May 3, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshiaki Kagawa, Kouji Shinkawa, Tohru Sakuwa
  • Publication number: 20110056397
    Abstract: A composite structure for application to an impression cylinder or a transfer cylinder includes an ink smear preventing sheet having flexibility as a whole backed by a flexible metal thin plate. The work surface of the ink smear preventing sheet has an ink smear preventing structure in the form of a concave-convex configuration. The ink smear preventing sheet is of a flexible sheet of resin having an adhesive layer thereon in which are partially embedded many small balls to form the concave-convex structure.
    Type: Application
    Filed: May 26, 2010
    Publication date: March 10, 2011
    Inventors: Yoshiki NISHIKAWA, Kenichi Misawa
  • Patent number: 7871362
    Abstract: The invention relates to an exchangeable cylinder jacket-shaped cover made of pile whose threads radially project outward. The aim of the invention is to provide a cover of this type, which has a high cohesive strength both in the axial as well as radial direction and which also has an outer and inner cylindrical contour that is as continuous as possible. To this end, the invention provides that the cover consists of an endless helically wound pile strip whose edges are interconnected by an endless helically running seam without forming a step that disrupts the cylindrical outer contour.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: January 18, 2011
    Inventors: Gregor Kohlruss, Hubert Wiesner, Oliver Griebe
  • Patent number: 7832935
    Abstract: A bearing (100) has a contact surface (110) for mating with a rotatable member. The contact surface has a plurality of crystalline grains (120) distributed at random; a plurality of micro-grooves (130) are formed among the crystalline grains; the micro-grooves communicate with each other thereby forming a net. The micro-grooves accommodate lubricant therein so that when the rotatable member rotates, a sufficient lubrication can be obtained between the bearing and the rotatable member. The bearing is formed by machining and then thermally etching a preform which is formed by powder metallurgy.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: November 16, 2010
    Assignee: Foxconn Technology Co., Ltd.
    Inventor: Chuen-Shu Hou
  • Patent number: 7744515
    Abstract: A conductive roller which can form images of consistent quality and does not cause image failures such as formation of blank spots and a method for inspecting the roller. The conductive roller having a metallic core and at least one rubber elastic layer provided on the outer peripheral surface of the core, the rubber elastic layer being formed from a conductive rubber to which conductivity has been imparted by carbon powder, wherein the conductive roller satisfies the relationship represented by formula (1): Zr/Zc?5??(1), wherein Zr (?) represents a resistance component and Zc (?) represents a capacitive reactance component, the resistance component Zr (?) and the capacitive reactance component Zc (?) being calculated respectively from impedance Z (?) and phase difference ?, when the impedance Z (?) is measured upon application of an AC voltage of 0.2 V at a frequency of 1 Hz to the rubber elastic layer.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: June 29, 2010
    Assignee: Synztec Co., Ltd.
    Inventors: Makoto Iwamura, Naoki Hirakawa, Masashi Yamazaki, Hitoshi Shirasaka
  • Patent number: 7712220
    Abstract: A method of a double starwheel unit in multiple rows with a multi-hole manner, an instrument and the like are disclosed. The double starwheel unit has a sleeve and two starwheel parallel-arranged and connecting the sleeve. The instrument has a plate-like assembly fixture and an orientation mechanism. The plate-like assembly fixture has a plurality of strip-like tools. The method combines the strip-like tools with the plate-like assembly fixture and a plurality of module holes, presses an exterior mold on the starwheel onto upper and lower surfaces of the plate-like assembly fixture, and injects a working fluid to shape the double starwheel units. The strip-like tools are engaged or disengaged by the orientation mechanism.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: May 11, 2010
    Assignee: Sine San AIE Technology Co., Ltd.
    Inventor: Shun-Sheng Cheng
  • Patent number: 7670650
    Abstract: A method for producing a replaceable fuser member including a thin, seamless or welded high temperature nickel sleeve, a base cushion positioned around the sleeve and an outside topcoat applied over the base cushion elastomer layer. The sleeve is replaceable on a machine mandrel positioned in an electrophotographic copying machine in a fuser section of the electrophotographic copying machine. The method includes the use of a mandrel having a coefficient of thermal expansion similar to that of the sleeve to support the sleeve during positioning of a cured base cushion layer around the sleeve and a cured topcoat layer over the cured base material.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: March 2, 2010
    Assignee: Eastman Kodak Company
    Inventors: Jiann-Chen Chen, Biao Tan, Allen Kass, Garold F. Fritz, Steven O. Cormier, Ralph E. Williams, Joseph A. Pavlisko
  • Patent number: 7647698
    Abstract: A method for producing a cutting or embossing roller having a cutting knife or embossing projection that projects out of the surface of a base body of the roller ensures the greatest possible optimal homogeneity of the cutting knife or the embossing projection, while minimizing production duration and costs. Single-layer or multi-layer application of the cutting knife or the embossing projection onto the roller base body occurs by laser resurfacing welding. Each layer is produced using an additional powdered material, which is melted in a melt bath at the weld point. The heat and/or light radiation emitted by the melt bath is detected, at least during application of each layer. Laser power is controlled or regulated as a function of the heat and/or light radiation emitted by the melt bath, so that melt bath temperature remains essentially constant during application of each layer.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: January 19, 2010
    Assignee: Winkler + Dünnebier Aktiengesellschaft
    Inventor: Michael Closmann
  • Patent number: 7632180
    Abstract: A method of making a rotor for a threshing system of an agricultural combine, the rotor including a main body segment made from a sheet formed into a tube and including specially shaped interlocking edges forming a serpentine joint routed locations where threshing element mounts attach to the rotor.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: December 15, 2009
    Assignee: CNH America LLC
    Inventors: Herbert M. Farley, Wayne T. Flickinger, Mark S. Epperly
  • Publication number: 20090252904
    Abstract: A method for the production of mechanically highly stressed machinery components, with at least one pass-through opening, especially suction roll sleeves on paper machines, includes the material characteristics of the machinery component being altered with regard to an increase in the resistance against vibratory fissure corrosion on the machinery component in the localized area of the pass-through opening. A roll sleeve produced according to this method is also provided.
    Type: Application
    Filed: April 7, 2009
    Publication date: October 8, 2009
    Inventors: Herbert Weinberger, Florian Hochreiter
  • Patent number: 7571542
    Abstract: A method of forming a roll for embossing aluminum sheet, and the associated roll, the method comprising subjecting a surface of a steel roll to at least the steps of, in order: blasting treatment, electrolytic treatment with 1,000 to 20,000 C/dm2 of electricity in which the steel roll is used as the anode, and chromium plating treatment. An aluminum sheet embossing roll produced by the method of the present invention has on the surface thereof peaks, or asperities, which are of uniform height and very numerous. As a result, aluminum sheets obtained using such a roll, when employed as lithographic printing plate supports, have excellent printing characteristics, particularly a long press life and a high sensitivity.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: August 11, 2009
    Assignee: FUJIFILM Corporation
    Inventors: Atsuo Nishino, Hirokazu Sawada, Akio Uesugi
  • Publication number: 20090185838
    Abstract: A method of manufacturing a toner carrier roller that is shaped like a cylinder on an outer circumferential surface of which concave and convex sections for carrying toner are provided, includes: preparing a roller base member which is shaped like a cylinder; forming helix-like first grooves on the outer circumferential surface of the roller base member; and forming helix-like second grooves, which cross the first grooves, on the outer circumferential surface of the roller base member, wherein a pitch ratio of the first grooves and the second grooves is a non-integer ratio.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 23, 2009
    Inventors: Tomohiro ARUGA, Masahiro MAEDA
  • Patent number: 7549312
    Abstract: A concentric machining device for a roller includes a movable upper base, a stationary lower base, two movable mold seats, two slide rods and four first hydraulic cylinders. Each of the mold seats has a forming mold inside, the forming mold has a fitting hole with an enlarged conical opening at the front side thereof, a locating shaft is received in the forming mold of the first mold seat and penetrates the fitting hole thereof and the first cylinder member, a clamping shaft is received in the forming mold of the second mold seat and penetrates the fitting hole thereof and the second hydraulic cylinder to connect with the fourth hydraulic cylinder. The roller is held by the bases and the shafts via two of the hydraulic cylinders and both ends of the roller are machined by the forming molds in the mold seats to provide squeezed and shrunk shapes once the mold seats are actuated by the other two hydraulic cylinders.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: June 23, 2009
    Inventor: Te-Li Huang
  • Publication number: 20090139291
    Abstract: A method for manufacturing a coiler drum to be used in a coiler furnace and a coiler drum. The method comprises the step of forming a trinickel aluminide containing surface layer onto a coiler drum body.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 4, 2009
    Inventors: Osmo Mikkola, Timo Norvasto, Pirjo Virtanen
  • Patent number: 7520057
    Abstract: A process produces a conductive rubber roller having small aspect ratios of inner and outer diameters, having a stable measure of its inner diameter, having uniform cell distribution and being free from non uniformity of hardness and electrical resistance in the peripheral direction. The process has a step of continuously extruding a tube composed of a specific unvulcanized rubber composition from a rubber extruder in a microwave vulcanizing unit, and a step of foaming and vulcanizing the tube by using a microwave irradiator having a microwave irradiation zone 4 m or less in length while being transported at given speed. The foamed rubber tube has an inner diameter 20 to 35% smaller than the outer diameter of the conductive core material over the whole region in the lengthwise direction, and the conductive core material is press fitted into the foamed rubber tube without using any adhesive.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: April 21, 2009
    Assignee: Canon Kasei Kabushiki Kaisha
    Inventors: Hiroshi Imasaka, Satoshi Fukuzawa, Mitsuru Okuda, Erika Umeki
  • Patent number: 7480995
    Abstract: The corrugating roller (7; 9) for machines to produce corrugated cardboard, comprises: a hollow cylindrical body (7B; 9B), with an outer (7D; 9D) surface provided with corrugations (7C; 9C); a circuit for a heat-carrying fluid; and a pair of necks (7E, 7F; 9E, 9F), through at least a first (7E; 9E) of which said heat-carrying fluid is supplied. The body (7B) and the necks (7E, 7F) are produced in a single block machined by removal.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: January 27, 2009
    Assignee: Fosber S.p.A.
    Inventors: Mauro Adami, Desiderio Garcia
  • Patent number: 7464467
    Abstract: A method is provided for manufacturing a sheet-conveying roller, which includes a roller shaft having a pipe-shaped roller body on an outer circumference of which a resin layer is formed, and bearing members made of resin being attached to both end portions of the roller shaft and having press-fitted portion and a bearing portion. The method includes: press-fitting the press-fitted portion into the both end portions of the roller shaft; cutting a portion of the press-fitted portion of the bearing members being press-fitted into the roller shaft, the portion protruding from the roller body; aligning axis of the sheet-conveying roller by cutting an outer circumference of the press-fitted portion press-fitted into the roller shaft; and cutting an end face of the bearing portion.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: December 16, 2008
    Assignee: Funai Electric Co., Ltd.
    Inventor: Shoichi Fukuyama
  • Publication number: 20080283567
    Abstract: A printing apparatus, an associated method, and computer program of designing a floating roller in a tensioning system adapted to supply a web of material from a web supply to a processing machine, or to send out a web of material from a processing machine such as printing device to another processing machine such as finishing device, comprises inputting an external radius of the floating roller, a measure of elasticity of the material, a thickness of the material, a width of the material, and angles at which the material contacts the floating roller; and adjusting a mass of the floating roller and a rotational inertia of the floating roller such that the floating roller maintains a constant tension on the web of material as the material is passing through the tensioning system based on the following equation: M 2 ? ( 1 - T _ a ? ? 3 Ebw ) ? sin 2 ? ( ? / 2 ) ? J 2 R 2 2 wherein M2 is the mass of the floating roller, J2 is the rotational inertia of the floating roller,
    Type: Application
    Filed: May 18, 2007
    Publication date: November 20, 2008
    Inventor: Ming Yang