With Inflatable Chamber Patents (Class 492/4)
  • Patent number: 9248516
    Abstract: A planing device with a feed path for moving a material piece. The device includes a cutterhead on one side of the feed path, and a hold down unit on an opposing second side. The hold down unit includes a contact member that is held in a downward position towards the feed path. A cut control member is positioned upstream from the cutterhead. In use, the depth of cut and resulting amount of material removed from the one surface of the piece is dependent upon the thickness of the piece. One or more additional cutterheads may be positioned downstream to remove additional material from the piece.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: February 2, 2016
    Assignee: Newman Machines Company, Inc.
    Inventor: Timothy F. Shirk
  • Patent number: 8869965
    Abstract: The present disclosure provides a roller and a conveying device. The roller includes an inner circle, an outer circle, and an inflatable cushion arranged between the inner circle and the outer circle with the volume thereof changing as air charge inflated thereinto changes. by adjusting the air charge of the inflatable cushion, the outer diameter of the roller is increased as the air charge inflated into the inflatable cushion increases, at the same time, the conveyor surrounding the exterior of the roller is tightened to increase the tension degree of the conveyor without disassembling other mechanisms of the conveying device, which is simply operated to be capable of saving labors and time.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: October 28, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Feng She
  • Patent number: 7972253
    Abstract: A pressure compensating device or arrangement for a roller arrangement which includes a central, non-rotating shaft provided with spaced apart bearings positioned adjacent opposite axial ends of the shaft and rotatably supporting at least one tubular roller segment, and where sealing arrangements are provided outside the bearings for sealing off the space inside the bearings and between the shaft and the roller segment towards the environment. The pressure compensating device includes a longitudinal bore extending from one end of the shaft and through at least a part thereof, with the bore communicating with the space between the sealing arrangements via channels. The bore is provided with a flexible member preventing direct communication between the exterior and the space between the sealing arrangements.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: July 5, 2011
    Assignee: Aktiebolaget SKF
    Inventor: Björn Pettersson
  • Publication number: 20100113237
    Abstract: An inflatable shaft mainly includes an elastic rubbery sleeve mounted around the outer wall of plural outer pressing boards and able to expand outward to cover gaps formed among the outer pressing boards while inflating the inflatable shaft, so as to provide a seamless exterior surface for the air expanding shaft to be directly wound with a stuff without having the stuff sunk or clamped. And, the rubbery sleeve can shrink inward together with the outer pressing boards while deflating the inflatable shaft, forming a space between the rubbery sleeve and the stuff to enable the stuff easily separated from the deflated shaft. Thus, the stuff can be smoothly wound around the inflatable shaft inflated without using an additional tube, not only lowering manufacturing cost but also amiable to environment.
    Type: Application
    Filed: November 5, 2008
    Publication date: May 6, 2010
    Inventor: Chun-Tsai CHEN
  • Patent number: 7662078
    Abstract: The present invention provides a method for creating uniform pressure at a nip comprising the acts of providing a stationary inner core, pivotally mounting a plurality of shoes to the stationary inner core, creating a plurality of annular chambers wherein each of the shoes occupies one of the chambers. In addition, the method further provides filling each of the chambers with a magneto-rheological fluid, surrounding the plurality of chambers, shoes, and stationary inner core with a thin, metal, rotatable shell; detecting a deformation in the shell and changing a magnetic field in at least one of the chambers to change a viscosity of the magneto-rheological fluid to correct the deformation.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: February 16, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Richard D. Bomba, Nelson A. Blish
  • Patent number: 7645222
    Abstract: A pressure roller (3; 7) for devices for processing continuous web materials is described, comprising a lateral surface (3S; 7S), including a regulating system (29, 50) to impose an adjustable crown of the lateral surface (3S; 7S) of the roller deforming said lateral surface.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: January 12, 2010
    Assignee: Fabio Perini S.p.A.
    Inventors: Guglielmo Biagiotti, Angelo Benvenuti
  • Patent number: 7530938
    Abstract: An assembly comprising: a tube made of resilient material, at least a portion of the tube forming a circumferential boundary of a chamber; first and second end cap assemblies supporting the tube at opposite ends thereof and forming respective end boundaries of the chamber, the chamber being filled with pressurized fluid; a hard roller that forms a nip with the tube; a fixed structure that supports the first and second end cap assemblies and the hard roller, the first and second end cap assemblies and the hard roller being respectively pivotably coupled to the fixed structure, and the fixed structure comprising a passageway that is in fluid communication with the chamber; and a slider-zipper-film assembly that is passed through the nip. The tube is deformed radially inward to allow passage of slider through the nip.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: May 12, 2009
    Assignee: Illinois Tool Works Inc.
    Inventor: Jimmy Lee Long
  • Patent number: 7481391
    Abstract: The present invention is to provide an air shaft comprising a hollow cylinder and a plurality of curved members provided on an outer surface of the hollow cylinder and between both ends thereof, wherein the curved members are adapted to move radially relative to the hollow cylinder and are spaced each other with a gap formed between any two adjacent ones of the curved members. As such, no continuous straight gaps are formed on an outer surface of the hollow cylinder while pushing the curved members. By utilizing the present invention, a web material can be wound on the air shaft directly without the need of mounting a roll on an outer surface of the air shaft, thereby eliminating the drawbacks of the prior art air shaft.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: January 27, 2009
    Inventor: Ming-Hsiang Kuo
  • Publication number: 20080318747
    Abstract: This roller (10) comprises a tubular support structure (14) of horizontal axis (X-X) adapted to be rotatably mounted on a tractor-drawn support frame. A series of semi-hollow tyres with a dome-shaped profile are threaded onto this tubular support structure and enable a series of parallel furrows to be formed in the earth. The tubular support structure (14) comprises a framework formed by a plurality of bars (30) joined together by two circular end cheeks (32) between which these bars extend axially. The tyres (12) are mounted on the bars of the framework, forming with the latter an assembly that is connected for rotation and translation.
    Type: Application
    Filed: June 5, 2008
    Publication date: December 25, 2008
    Applicant: OTICO
    Inventor: Olivier PHELY
  • Patent number: 7455635
    Abstract: The invention relates to a casting roller (1), for a double-roller continuous casting machine, in particular for the casting of a steel strip, comprising a cylinder sleeve (2) which may rotate about a fixed axle (5). Intermediate rings (7b, 7c, 7d) rotating with the cylinder sleeve (2) are arranged between the cylinder sleeve (2) and the axle (5), which are provided with radial pressure means (9), acting on the cylinder sleeve (2). The above comprise a pressure chamber (10), pressurized with a fluid pressure medium and acting on a pressure ring (24) fixed to the inner wall of the cylinder sleeve (2), which may be deformed in the radial direction by inductive heating or radiated heat. The external profile of the casting roller (1) may be globally altered or local fine adjustments made by pressurizing the pressure chamber (10) with the pressure medium, or by heating the pressure ring (24).
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: November 25, 2008
    Assignees: SMS Demag AG, Main Management Inspiration AG
    Inventors: Heinrich Marti, Jacques Barbé, Benno Steiner, Hans Streubel
  • Publication number: 20080096747
    Abstract: A web processing roll comprising at least one cavity. The cavity of the roll is at least partially filled with a mixture of a liquid and at least one mixing partner that is insoluble in the liquid. Solid particles, preferably a granular solid, or another liquid constitute the mixing partner.
    Type: Application
    Filed: October 8, 2004
    Publication date: April 24, 2008
    Inventors: Mario Wipprecht, Heinz Adam, Franz Freis
  • Patent number: 7252261
    Abstract: A generally cylindrical expansible shaft includes an outer profile, and a generally cylindrical inner body having a longitudinal axis and at least one first coupling element. At least two semi-circular leaf elements may be movably coupled to the first coupling element of the inner body by means of at least one second coupling element. The leaf elements may together substantially form the outer profile of the generally cylindrical expansible shaft. At least one thrusting element may be operatively disposed between the leaf elements and the inner body to move the leaf elements radially outwards relative to the longitudinal axis to increase an outer diameter of the shaft when in a first configuration, and allow the leaf elements to move radially inwards relative to the longitudinal axis to decrease the outer diameter of the shaft when in a second configuration.
    Type: Grant
    Filed: April 5, 2004
    Date of Patent: August 7, 2007
    Assignee: Goldenrod Corporation
    Inventors: James W. Rollins, Robert C. Smith
  • Publication number: 20040214698
    Abstract: An airshaft includes a shaft body having a shaft axis, and an outer shaft surface formed with at least three bladder retaining grooves. Each bladder retaining groove is generally inverted T-shaped, and has a narrower access opening formed in the shaft surface and a wider retaining section disposed between the access opening and the shaft axis. An inflatable bladder member is received in the retaining section of each retaining groove. Each of a plurality of roll contact pieces is disposed in the retaining section of a respective retaining groove, is biased by the inflatable bladder member in the respective retaining groove, and extends out of the access opening of the respective retaining groove. The roll contact pieces include a set of first roll contact pieces and a set of second roll contact pieces. The second roll contact pieces have a height shorter than that of the first roll contact pieces.
    Type: Application
    Filed: July 8, 2003
    Publication date: October 28, 2004
    Inventor: Hsi-Tsai Chen
  • Patent number: 6789479
    Abstract: An apparatus for mounting a printing sleeve on a press cylinder includes an inherently stiff annular holding element having an inner shape which is matched to the outer shape of the sleeve, and mutually facing ends defining a slit having a width. At least one clamp urges the ends toward each other to form a butt joint, so that the holding element can clamp the sleeve with a clamping force which is limited by the width of the slit. A device is provided for expanding the holding element so that the clamping force on the sleeve can be released.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: September 14, 2004
    Assignee: MAN Roland Druckmaschinen AG
    Inventors: Josef Göttling, Thomas Hartmann
  • Patent number: 6702928
    Abstract: The invention relates to a press roll (1) comprising a flexible rotating endless-loop blanket (3) of a liquid-impervious material, two disc-shaped roll heads (4, 5), and a clamp element (14) filled with a pressurized medium for clamping the lateral rims (21) of the blanket (3) to the respective ones (4, 5) of the roll heads. The invention is implemented by adapting between the pressurized-medium-filled clamp element (14) and the blanket (3) an annular ring (18) serving to press the rim of the blanket (3) during the pressurization of said clamp element against the inner rim surface (15) of a sector plate (7) and, respectively, serving to contract the clamp element (14) when the pressure of the clamp element (14) is removed or lowered.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: March 9, 2004
    Assignee: Vaahto Oy
    Inventor: Erkki Aho
  • Patent number: 6641513
    Abstract: A low inertia, low friction roller (12), which is particularly adapted for handling relatively high speed, relatively fragile running webs, comprises an inner tube (16) and an outer tube (14). The outer tube (14) is disposed substantially coaxially about the inner tube (16) and is rotatable with respect to the inner tube (16). An annular gap (46) is defined between the inner and outer tubes and has a first portion that is supplied with a restricted flow of a pressurized compressible fluid and that is adjacent the portion of the outer tube about which the web passes. A second portion of the annular gap is circumferentially spaced from the first portion of the annular gap and communicates with a fluid exhaust passage (66) in the inner tube.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: November 4, 2003
    Assignee: Martin Automatic Inc.
    Inventors: James K. Ward, Roger Cederholm
  • Patent number: 6640711
    Abstract: A bridge mandrel includes an inner sleeve assembly comprising the inner laminate and an outer laminate secured on each side of an intermediate hardened foam layer. The inner laminate is of multi-ply form with inner plies of base and adhesive layers separated from outer plies of base and adhesive layers by a compressible foam layer. The adhesive layers are made from high viscosity thermoplastic adhesive material. The intermediate layer is of segmented form with a radial gap between adjacent segments. A header is mounted to each end of the inner sleeve assembly.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: November 4, 2003
    Inventors: Michael A. Smoot, Gregory J. Gayle, Michael J. McGuinness
  • Publication number: 20030125176
    Abstract: A pinion for mounting rolls thereupon for reducing rod or wire in a rolling mill wherein said pinion has a pair of hydraulic pressure chambers formed therein which cause a threaded plug in a cavity in said pinion to undergo lateral movement to expand the pinion to engage a roll mounted on said pinion, and thence to cause a clamp to laterally clamp a roll against an abutment formed on the pinion to clamp the roll on the pinion once the plug has undergone lateral movement.
    Type: Application
    Filed: December 10, 2002
    Publication date: July 3, 2003
    Inventor: Mario Fabris
  • Publication number: 20030114283
    Abstract: In a guide roller for a stamping machine for deflecting a stamping foil web and/or a substrate web to be stamped upon, so that the guide roller has a negligibly low degree of friction, fixed to a roller spindle that is fixed with respect to the machine is at least one porous air-permeable spindle sleeve at which at least one roller sleeve is rotatably mounted. The roller spindle has a compressed gas passage for acting on the or each spindle sleeve with compressed gas to produce a gas cushion between the or each respective spindle sleeve and the associated roller sleeve.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 19, 2003
    Inventors: Georg Kaluza, Ralf Friedmann
  • Patent number: 6526885
    Abstract: A printing sleeve in combination with a support device includes a printing sleeve having, a first end, a second end and an interior surface, and an inflation device acting on the interior surface of the printing sleeve when the printing sleeve is removed from a printing press. The combination advantageously permits the inflation device to act at both ends of the printing sleeve and also to make the combination portable.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: March 4, 2003
    Assignee: Heidelberger Druckmaschinen AG
    Inventors: Peter Walter Walczak, Joseph Dushan Winnicki
  • Patent number: 6401613
    Abstract: A printing cylinder sleeve assembly comprises an inner sleeve made of tubular form from a material which is capable of expanding upon the application of air pressure to the inner surface of the inner sleeve. An outer sleeve is mounted over the inner sleeve in a slip fit manner so that the outer sleeve could be mounted over the inner sleeve assembly comprising the inner sleeve and the outer sleeve and the assembly as a unit can then be mounted over the printing cylinder.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: June 11, 2002
    Assignees: Xymid, LLC, E.I. Du Pont de Nemours & Co.
    Inventors: Gregory J. Gayle, Anthony Bart
  • Patent number: 6394943
    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.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: May 28, 2002
    Inventors: Steven Cormier, James D. Shifley, Gregory L. Kowalski
  • Patent number: 6378434
    Abstract: An apparatus for facilitating handling of sheets in a sheet-fed printing press comprising a matte that is mountable on a cylinder. The matte has at least one inflatable pocket for cushioning sheets of printable material as they are passed between two cylinders of the press. At least one valve communicates with the inflatable pocket and controls the quantity of fluid in the inflatable pocket. A number of inflatable pockets can be utilized to provide increased control over various sheet sizes. Further control may be obtained by including a number of valves to independently operate each of the inflatable pockets. Ease of installation and removal is accomplished by incorporated mounting holes along the long axis of the matte. Alternatively, the matte may be arranged on the cylinder by adhesively bonding (tape or glue) the matte to the surface of the cylinder or by arranging the matte on the cylinder with Velcro fasteners.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: April 30, 2002
    Assignee: Baldwin GraphicSystem, Inc.
    Inventors: Charles R. Gasparrini, Edward E. Marganski, Richard P. Rubin, Robert L. Ruch
  • Publication number: 20020006854
    Abstract: Braking roller for systems for cutting metal bands into strips, characterized in that it comprises a rotating and motorized (21) shaft (20), with two supported (in 33) end pins (22, 23), which in a central side surface (24) carries a series of idle pulleys (25), axially held (in 27), in said central side surface (24) there being provided at least one recess (30) inside which there is arranged at least one inflatable element (29) above which there is arranged at least one wear element (34) that is made to abut inwards of each idle pulley (25). The roller can be used both into a tow group and as braking bridle or as baffle roller according to the specific need.
    Type: Application
    Filed: May 24, 2001
    Publication date: January 17, 2002
    Inventor: Giulio Magnani
  • Patent number: 6261487
    Abstract: In order to control and optimize, without stopping production, bowing in the outer wall of a calender roll in which bowing is produced by the action of pressure on an incompressible liquid enclosed in the roll, the invention proposes that, based on error signals generated from continuous thickness measurements and from at least one other quality characteristic, the temperature of the liquid is controlled and the nip modified to correct for deviations from the correct thickness.
    Type: Grant
    Filed: September 9, 1998
    Date of Patent: July 17, 2001
    Assignee: Brunckner Maschinenbau GmbH
    Inventors: Horst Bongaerts, Dietmar Jenke
  • Patent number: 6129017
    Abstract: A cylinder for a rotary printing press can be changed between two operating modes. In a first one of these operating modes the cylinder's surface is divided into many sections. In the second operating mode, the cylinder has a functionally continuous surface area.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: October 10, 2000
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Hans Dierk Mohrmann, Rainer Wieland
  • Patent number: 5904095
    Abstract: A bridge mandrel for use as part of the rollers used in flexographic printing presses. When used as a part of the printing roller, the bridge mandrel allows the use of inexpensive printing sleeves to which the flexographic printing plates can be attached. When used as part of the inking roller, the bridge mandrel provides a durable and cost effective design. The bridge mandrel is made from a cylinder and two bearing sleeves that mount the cylinder to a standard mandrel. When the bridge mandrel is used as a printing roller, the thin printing sleeve mounts to the cylinder by means of an extension of the conventional compressed air mounting system. The ability to use inexpensive thin printing sleeves greatly reduces the cost and time expenditure normally associated with changing the printing rollers in flexographic printing presses.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: May 18, 1999
    Assignee: MECA of Green Bay, Inc.
    Inventor: Robert R. Nelson
  • Patent number: 5840386
    Abstract: A sleeve adapted to be mounted on a mandrel to form a liquid transfer roll or the like comprises a radially expandable inner skin defining a radially inner surface of the sleeve, at least one radially compressible intermediate layer of resilient plastic material; and a rigid, self-supporting metal outer tube. Further methods for producing such a sleeve are described.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: November 24, 1998
    Assignee: Praxair S.T. Technology, Inc.
    Inventors: Russell Bruce Hatch, Jacques Luthi
  • Patent number: 5800324
    Abstract: A roll, as in a paper making machine press section, with vibration damping, wherein the roll includes a stationary central shaft, a rotatable annular, roll shell, a plurality of hydraulic pressure chambers each with a shoe hydraulically supported therein and pressed against the interior of the annular roll shell, wherein the roll shell is subject to vibration, which vibrates the support elements. A hydraulic pressure liquid feed channel extends through the stationary shaft and communicates with each pressure chamber. A respective throttle in the form of a channel either between the feed channel and each of the pressure chambers, or one throttle channel communicating with several of the pressure chambers or a throttle channel communicating into the feed channel from the source of pressure fluid. The cross section of flow through the throttle channel is selected according to a formula, typically wherein the product d.sup.2 .times.n.sup.-1 is between 6 mm.sup.2 and 90 mm.sup.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: September 1, 1998
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventor: Christian Schiel
  • Patent number: 5706731
    Abstract: A flexographic printing cylinder comprises a hollow support cylinder with a supply of compressed air to within the hollow support cylinder. Nozzles pass through the support cylinder to convey the compressed air from the inside to the outside of the support cylinder. An interpolated sleeve tightly fits over the support cylinder, and a thin sleeve tightly fits over the interpolated sleeve. Nozzles extend through the interpolated sleeve in registry with the nozzles through the support cylinder to convey compressed air to the thin sleeve. Structure is provided for selectively opening and closing the nozzles of the interpolated sleeve.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: January 13, 1998
    Inventors: Philippe Francille, Jean Francille
  • Patent number: 5700233
    Abstract: Apparatus for mounting a mill roll on a mill drive shaft in which mounting concentricity is produced by the internal expansion of the drive shaft to engage the bore of the mill roll. A secondary clamping device provides additional lateral binding force on the mill roll necessary for the production of the required frictional forces for the transmission of driving torque from the shaft to the mill roll.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: December 23, 1997
    Inventor: Mario Fabris
  • Patent number: 5662821
    Abstract: A screen printing stencil is produced by irradiating a light responsive layer situated on the surface of a rotating screen printing cylinder in a punctiform fashion by means of a laser beam which impinges at least approximately radially on the screen printing cylinder and is moved in the radial direction thereof. The screen printing cylinder is supported only in the region of its opposite end faces, while it is inflated so strongly over at least one of these end faces by means of a compressed gas that it assumes a circular cross-section. If the circumferential surface of the screen printing cylinder is opened by burning away the light responsive layer, sealing elements can be blown into the screen printing cylinder in order to seal the cylinder in the region of its exposed perforation.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: September 2, 1997
    Assignee: Schablonentechnik Kufstein Aktiengesellschaft
    Inventor: Siegfried Ruckl
  • Patent number: 5634606
    Abstract: A press-on roller which is usable to press a first paper web into contact with a second paper web includes a support tube and a resilient press-on sleeve which is concentric with the support tube and separated from it by an annular space. This annular space is provided with at least one and preferably with a plurality of gas-filled cells. These gas filled cells provide the press-on roller with a controllable resiliency.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: June 3, 1997
    Assignee: Koenig & Bauer-Albert Aktiengesellschaft
    Inventor: Klaus W. Roder
  • Patent number: 5537923
    Abstract: An apparatus for facilitating the movement of a printing sleeve with respect to a cylinder is provided which includes a manifold section having an air chamber therein in fluid communication with an air supply line. The manifold section has a plurality of air ports in fluid communication with the air chamber. An adapter ring is provided which surrounds the manifold section and has a plurality of air ports therein, corresponding in number to the air ports in the manifold section and adapted to be placed in fluid communication with the air ports in the manifold section. A locking collar for fixing the position of the manifold section on the shaft in contact with the cylinder and for fixing the adapter ring in contact with the printing sleeve is provided such that when pressurized air is introduced into said supply line, the air exits the air ports in the adapter ring and expands the sleeve thus allowing the sleeve to be moved with respect to the cylinder.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: July 23, 1996
    Assignee: Huntsman Packaging Corporation
    Inventors: Royal E. Boor, Richard C. Phillips, Craig S. Finley, Stephen D. Burt
  • Patent number: 5515781
    Abstract: A printing sleeve including a nickel sleeve having an inner surface and an outer surface and opposite end portions and opposite ends, and hard rubber rims bonded to the outer surface at the end portions and having rim portions extending beyond the opposite ends of the nickel sleeve and bonded thereto, and inner surfaces on the rim portions which are substantially in line with the inner surface of the nickel sleeve. A method of bonding a hard rubber rim onto each end of a nickel printing sleeve comprising the steps of applying an adhesive to each end and end portion of the sleeve, inserting a plug into each end of the sleeve, winding an unvulcanized rubber strip around each end portion of the sleeve and onto the play, and heating each rubber strip to cause it to cure and bond to the end portion of the sleeve.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: May 14, 1996
    Assignee: Luminite Products Corporation
    Inventor: Richard F. Songer
  • Patent number: 5507228
    Abstract: A new and improved printing cylinder or image carrier sleeve which is formed of either carbon fiber/particles or from a relatively thin flat sheet of metal. The flat sheet of metal, for example, stainless steel or tin, is rolled to form a cylinder of desired diameter and welded together along the longitudinal edges. The weld seam or spots may be filed to have a substantially flat and smooth surface. Also disclosed is a mandrel assembly having an outer expansion sleeve member with one or more yield or preferential expansion regions, for example, circumferential grooves for applying pressure to effect outward expansion of said outer sleeve member.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: April 16, 1996
    Inventor: Werner Schulz
  • Patent number: 5484370
    Abstract: A rotatably supported roll (1), which is adapted to form a nip with a second roll, so as to advance therebetween a web of material. The load in the nip between the rolls can be controlled by an adjustable camber. To this end, an interior hollow space (13) is provided in the roll (1), which is filled with an incompressible pressure medium, and put under a controlled pressure, so as to cause the roll jacket (10/12) to bulge radially outwardly. This bulging can be significantly supported and influenced by a predetermined progression of the wall thickness of the jacket (10/12) in the axial direction of the roll.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: January 16, 1996
    Assignee: Barmag AG
    Inventors: Dietmar Jenke, Josef Majsai, Winfried Wubken
  • Patent number: 5481975
    Abstract: A printing cylinder is disclosed comprising a four-piece mandrel assembly having spaced outer journal sections, a first cylindrical sleeve circumferentially mounted at its ends about a respective journal section, a second cylindrical sleeve having an inner diameter slightly larger than the outer diameter of said first cylindrical sleeve and being circumferentially mounted thereon by means, for example, circumferential welds, to provide a substantially uniform space circumferentially between said first and second sleeve members, said second sleeve member having one or more yield or preferential expansion regions, for example, circumferential grooves and a hydraulic system for applying pressure between said first and second sleeve members to thereby effect outward expansion of said second sleeve member.Another feature of the invention comprises the interchangeability of image carrier sleeves each having a selected thickness for mating operation with different inking rollers.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: January 9, 1996
    Inventor: Werner Schulz
  • Patent number: 5453069
    Abstract: A working roller for applying pressure to a web of material interposed between the working roller and an opposing working surface includes a generally tubular roll-shell with bearings at each end thereof, a pair of stationary journals for supporting the roll-shell for rotation about its longitudinal axis, a stationary internal support structure, and a plurality of internal rollers which bear upon the inner wall of the roll-shell and are mounted to the internal support structure by a plurality of individually adjustable thrust-supports for controlling the outer contours of the roll-shell. The invention allows greater control of the outer contours of the roll-shell to compensate for localized, longitudinally asymmetrical deviations from the desired pressure distribution or spacing between the working roller and an opposing working surface or to permit predetermined, non-uniform pressure distributions or spacings between the working roller and an opposing working surface.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: September 26, 1995
    Assignee: Snyder Manufacturing Inc.
    Inventors: Dennis L. Snyder, Brentin H. Myers
  • Patent number: 5341664
    Abstract: The bridle or bridles of a stretching or levelling line for a thin metal strip, e.g. of a thickness of up to 1 mm, can have at least one roll of a periphery variable between an outwardly convex and an inwardly concave bulge to compensate for dishing of the strip or edge waviness.
    Type: Grant
    Filed: July 14, 1993
    Date of Patent: August 30, 1994
    Assignee: BWG Bergwerk- und Walzwerk-Maschinenbau GmbH
    Inventors: Rolf Noe, Andreas Noe
  • Patent number: 5308307
    Abstract: An installation for rolling a flat product, comprising a support stand composed of two spaced uprights between which is placed a plurality of superposed rolls, between which a squeezing force is applied, for rolling a product (B) passing between two work rolls (A, A'). At least one of the work rolls (A) consists of a tubular jacket mounted for rotation about a stationary central shaft along which is provided a plurality of spaced bushes, isolated from one another. The work roll is associated with a feed circuit for circulating pressurized oil in order to form an oil film between each bush and the jacket. The pressure of the oil film between each bush and the corresponding zone of the jacket is individually adjusted for the application of radial forces of adjustable intensity per bush.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: May 3, 1994
    Assignee: CLECIM
    Inventors: Michel Morel, Andre Ravenet