Sheet Or Web Patents (Class 162/271)
  • Patent number: 10152012
    Abstract: A sheet conveying apparatus includes: a drawer portion that includes a pair of conveying rollers which convey a sheet; a conveying portion that includes a pair of separating rollers which convey the sheet; and a controller that controls operations of the drawer portion and the conveying portion such that, the pair of separating rollers are separated from each other if a jam of a sheet occurs in a state in which a subsequent sheet subsequent to a preceding sheet spans the drawer portion and the conveying portion, the pair of conveying rollers convey the subsequent sheet to a part between the pair of separating rollers, the separation of the pair of separating rollers is released, and the pair of separating rollers convey the subsequent sheet along with the preceding sheet to a position at which the subsequent sheet does not span the drawer portion and the conveying portion using.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: December 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Yoshida, Takayuki Suzuki
  • Patent number: 10073404
    Abstract: The curl correction device includes a first guide that guides a sheet to a nip portion between a first rotation member and a second rotation member, a support portion that rotatably supports the first guide about a fulcrum on the downstream side of the first guide, and a restriction portion that restricts a rotation of the first guide rotating about the fulcrum by being in contact with the first guide. The first guide is rotatable about the fulcrum so as to become separated from the restriction portion.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: September 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroshi Kokubo
  • Patent number: 10056591
    Abstract: A method for producing a functional film is provided. In the method, a film is sequentially transferred through processing devices including a film inspection device. At least one expander roll is used for film transfer from a processing device to the film inspection device next to the processing device.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: August 21, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Jian Wang, Koichiro Watanabe
  • Patent number: 9937732
    Abstract: A medium transport apparatus includes a transport section configured to support a medium and transport the medium in a transport direction, and a wrinkle reducing section configured to come into contact with the medium to reduce the formation of wrinkles in the medium. The wrinkle reducing section can change surfaces to come into contact with the medium. The medium transport apparatus having such a structure enables to reduce the formation of wrinkles in the medium.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: April 10, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Shuichi Kanemoto
  • Patent number: 9873975
    Abstract: The invention concerns a method and corresponding apparatus of transferring a piece of cloth from a pair of spreader clamps to a conveyor via a transverse boom, where the piece of cloth is first suspended and straightened between the spreader clamps, then delivered to the transverse boom, and subsequently delivered from the transverse boom to the conveyor. Apart from that, a straightening of the fore edge of the piece of cloth is performed, seen in the direction of conveyance of the conveyor, after its delivery from the clamps to the transverse boom has been initiated, but before it is delivered to the conveyor.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: January 23, 2018
    Assignee: JENSEN DENMARK A/S
    Inventors: Steen Nielsen, Henrik Munch Jensen, Niels Peter Madsen
  • Patent number: 9850087
    Abstract: A sheet processing apparatus includes a pair of belts, a water supplying unit, a curving unit and a controller. The pair of belts defines a conveying path for holding and conveying a paper sheet. The water supplying unit supplies water to outer surfaces of the belts. The curving unit curves the conveying path defined by the belts. The controller makes the water supplying unit supply water to the outer surfaces of the belts, and makes the belts convey the sheet between the belts in a state where the conveying path is curved by the curving unit to correct the curling of the sheet.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: December 26, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventor: Shuanglong Wang
  • Patent number: 9789703
    Abstract: There is provided a recording device including a transport section that transports paper along a support surface; a recording section; a determination region setting section; a liquid volume ratio calculation section; a determination section; and a recording position adjustment section that, when the determination section determines that the average value is larger than the threshold, adjusts a distance of the recording section from the support surface to a distance which is longer than a case in which the average value is not larger than the threshold.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: October 17, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Hidetoshi Kodama
  • Patent number: 9772594
    Abstract: A curl correcting device includes a pair of fixed guides and a change-over guide. The pair of fixed guides composes a curved part of a conveyance path. The change-over guide is provided to be contactable with a sheet from a radial outer side of the curved part. An outer guide includes a pair of side pressing parts and a bulge part. The pair of side pressing parts is formed at both ends in a width direction. The bulge part is formed between the pair of side pressing parts so as to bulge toward the radial outer side of the curved part. The change-over guide is configured to move to a first correcting position when the sheet curled along the conveyance direction is conveyed through the conveyance path and to move to a second correcting position when the sheet curled along the width direction is conveyed through the conveyance path.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: September 26, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Toshiyuki Hamada
  • Patent number: 9632471
    Abstract: A sheet conveyance apparatus is equipped with a first rotator, a second rotator conveying a sheet together with the first rotator, a cam member changing a position of the second rotator with respect to the first rotator, a drive unit rotating the cam member, and a load portion applying load on a rotation of the cam member. The load portion includes a contact member having a cam surface formed on a side surface in an axial direction of the cam member, an abutment member capable of abutting against the cam surface, and a biasing member biasing one of the contact member and the abutment member toward the other, a biasing force of the biasing member converted into a force, applying load to the rotating cam member, by the cam surface opposing to a rotating direction in which the cam member is driven by the drive unit.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: April 25, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kengo Sato, Masaki Kakitani
  • Patent number: 9395674
    Abstract: A curl correction apparatus that corrects a curl of a sheet includes: a hard roller that is disposed in the downstream in a sheet conveying direction of a heating apparatus; a soft roller that is disposed in the downstream in the sheet conveying direction of the heating apparatus; and a guide member that is disposed in the immediate upstream in the sheet conveying direction with respect to the hard roller, and guides the sheet; wherein a nip width in the sheet conveying direction of a nip portion between the hard roller and the soft roller is set to be narrower in a central portion in an axial direction than end portions in the axial direction, and the guide member is configured to protrude in the central portion in the axial direction toward the downstream in the sheet conveying direction from the both end portions in the axial direction.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: July 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Ken Murooka
  • Patent number: 9316985
    Abstract: An image forming apparatus includes a transfer unit configured to transfer a developing agent image onto a sheet, a fixing unit configured to fix the developing agent image onto the sheet, a discharge tray configured to receive the sheet having the developing agent image thereon, at least one pair of discharge rollers disposed downstream of the fixing unit in a conveying direction and configured to discharge the sheet toward the discharge tray, and at least one pair of conveying rollers disposed at a conveying path extending between the fixing unit and the at least one pair of discharge rollers. The at least one pair of conveying rollers is configured to convey the sheet toward the at least one discharge rollers in the conveying direction and to form the sheet into a corrugated shape having at least one of a ridge portion and a groove portion in a sheet thickness direction.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: April 19, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Atsushi Miwa
  • Patent number: 8632662
    Abstract: A sheet of material is received at a sensor assembly, which includes a sensor operable to measure a property of the sheet. An air flow is generated that is substantially tangential to the sheet in order to at least partially control a position of the sheet relative to the sensor assembly. For example, the sheet may be associated with an upstream boundary layer of air and a downstream boundary layer of air. At least part of the air from the upstream boundary layer could be removed and used to provide an air flow forming at least part of the downstream boundary layer. Also, the air flow could be provided between a surface of the sensor assembly and the sheet to at least partially control a distance of the sheet from the surface of the sensor assembly and/or an angle at which the sheet passes the surface of the sensor assembly.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: January 21, 2014
    Assignee: Honeywell International Inc.
    Inventor: John K. Shakespeare
  • Patent number: 8603299
    Abstract: A method for forming a web of transversely extensible fibrous material includes the steps of subjecting a fluid-permeable endless conveyor belt of elastic material, of thickness increasing from its longitudinal axis to its edges, to a localized transverse stretching operation, achieved by temporarily withdrawing a longitudinal band thereof from the surface on which it naturally slides and maintaining it in contact, in this stretched condition, with at least a part of the surface of a support member; depositing a web of pliable fibrous material having a liquid content between 3% and 70% by weight against that portion of the conveyor belt of elastic material which has been transversely stretched; and with vacuum, maintaining the web of pliable fibrous material adhering to the conveyor belt of elastic material during its return to its original configuration, to cause the transverse contraction of the web and the simultaneous partial removal of liquid therefrom.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: December 10, 2013
    Inventors: Giorgio Trani, Marion Sterner
  • Patent number: 8282781
    Abstract: A sheet of material is received at a sensor assembly, which includes a sensor operable to measure a property of the sheet. An air flow is generated that is substantially tangential to the sheet in order to at least partially control a position of the sheet relative to the sensor assembly. For example, the sheet may be associated with an upstream boundary layer of air and a downstream boundary layer of air. At least part of the air from the upstream boundary layer could be removed and used to provide an air flow forming at least part of the downstream boundary layer. Also, the air flow could be provided between a surface of the sensor assembly and the sheet to at least partially control a distance of the sheet from the surface of the sensor assembly and/or an angle at which the sheet passes the surface of the sensor assembly.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: October 9, 2012
    Assignee: Honeywell International Inc.
    Inventor: John F. Shakespeare
  • Patent number: 8002271
    Abstract: An image forming apparatus that includes: an image forming unit that forms an image on a surface of a conveyed sheet; a guide that guides the sheet conveyed from the image forming unit; a correction roller located downstream of the guide in a conveyance direction of the sheet, the correction roller correcting a curl of the sheet conveyed; a plurality of rollers disposed opposite the correction roller along the periphery of the correction roller, the rollers nipping the sheet with respect to the correction roller; and a guide member having a wheel that guides the sheet being guided by the guide and conveyed toward the correction roller.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: August 23, 2011
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Junki Ueyama
  • Patent number: 7459062
    Abstract: Dryer section for drying a fibrous web supported by at least one drying fabric. The dryer section includes a plurality of heated drying cylinders, a plurality of guide rolls, and a plurality of dampening devices arranged at different locations relative to the fibrous web. Each dampening device applies a quantity of liquid to the fibrous web. In at least in one of the plurality of dampening devices, the quantity of the liquid is adjustable separately in zones transversely with respect to a web running direction. 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: January 24, 2005
    Date of Patent: December 2, 2008
    Assignee: Voith Paper Patent GmbH
    Inventors: Roland Mayer, Markus Oechsle, Antje Stein, Frank Wegehaupt
  • Patent number: 7356303
    Abstract: An image forming apparatus having: an image forming portion to form an image on a sheet; a fixing device to fix the image to the sheet by heating; a conveying path switching member to switch a conveying direction of the sheet, which is provided on downstream of the fixing device in a sheet conveying direction; a first conveying path which has a first curved portion and is provided on downstream of the conveying path switching member; a second conveying path which has a second curved portion and is provided on downstream of the conveying path switching member; a curl applying member which is provided on downstream of the fixing device, and on upstream of the first and second curved portions; and a control unit to control driving of the conveying path switching member and of the curl applying member.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: April 8, 2008
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kyoichi Mizuno, Shinichi Kawabata, Taro Miyamoto, Kunihiro Kawachi, Ken Nonaka, Kazunobu Miura
  • Patent number: 6908242
    Abstract: A roll paper curl correction device has a clamp roller for clamping and transporting roll paper, and a guide member comprising a guide face being positioned in the downstream proximity of the clamp roller and formed so that the roll paper is curved to an opposite side of a curl tendency of the roll paper for coming in contact with the non-print side of the paper roll. The guide face can be a curve face formed so as to curve to the opposite side of the curl tendency of the roll paper.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: June 21, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Keiichi Oshima, Hideyuki Kataoka
  • Patent number: 6775516
    Abstract: A curl eliminating device, which is constructed in a way that can cool the sheet and straighten the curl at the same time without having a large device and without increasing cost. The device has a transporting roller, arranged in a sheet transporting passage; and a plurality of backup rollers, arranged abreast along a circumference of the transporting roller. The backup rollers press-contacts the transporting roller during rotating. The curl eliminating device clamps and transports the sheet in a way that the sheet conforms with the shape of the circumference of the transporting roller. The backup rollers are separately arranged along the circumference of the transporting roller, and a separating distance is set to be changeable. The separating distance is set according to a curl amount of the sheet.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: August 10, 2004
    Assignee: Ricoh Company, Ltd.
    Inventor: Yuzo Kouno
  • Patent number: 6767431
    Abstract: In the manufacture of a paper or board web (W), the web is slit or cut, the rising/lowering (H) of the edges of a slit/cut gap (C) formed at the slitting/cutting point or the width (L) of the gap is measured by means of a measurement device (21A; 21B; 21C), and the curl of the paper or board web (W) is regulated based on the result of measurement. A paper or board machine line has means for regulating curl in the web (W); means for slitting or cutting the paper or board web and for measuring the rising/lowering (H) of the edges of a slit/cut gap (C) formed at the slitting/cutting point or the width (L) of the slit/cut gap (C) in connection with the manufacture of the web (W) in order to regulate the curl of the web (W) based on the result of measurement.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: July 27, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Antti Komulainen, Kari Juppi
  • Patent number: 6716317
    Abstract: A running web is decurled by controlling web tension as well as the angle of wrap on a decurler roll and a cooperating pivot roll, all without affecting web tension in the downstream web converting process. An upstream brake roll and a downstream pull roll control web tension within the decurler apparatus and independent decurler rolls are provided for removing up-curl and down-curl.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: April 6, 2004
    Assignee: Marquip, LLC
    Inventors: Jeffrey U. Gafner, Robert L. Turnquist
  • Patent number: 6671490
    Abstract: This invention relates to an image forming apparatus that can correct a curl of a transfer medium correctly and smoothly. This image forming apparatus includes a curl correcting mechanism, including a rotatable sponge roller and a fixed press member which presses the sponge roller while biting into part of the outer surface of the sponge roller, and provided downstream of a fixing processing unit, and a regulating unit, provided immediately before the curl correcting means, so as to guide the leading end of the transfer medium to that position on the outer surface of the sponge roller which is tilted, within the range of 5° to 10° (both inclusive) from a reference line that connects the center of the sponge roller and the press start position of the press member with respect to the sponge roller, to a direction opposite to the rotating direction of the sponge roller.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: December 30, 2003
    Assignee: Konica Corporation
    Inventor: Takenori Suenaga
  • Patent number: 6603954
    Abstract: A portable, post slit decurler and high capacity stacker module for use with a machine, such as, a desktop page printer, includes a decurler that decurls prints after they have been slit into thirds, halves, or whole prints. The post slit decurler and high capacity stacker module sits in a receiving tray of a copier/printer and is separately powered or “hard wired” into the copier/printer.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: August 5, 2003
    Assignee: Xerox Corporation
    Inventors: John D. Zoltner, Gary A. Kelpin
  • Patent number: 6572521
    Abstract: A curl bow machine manufactures curl bows. Ribbon unwinds from spools and a curling rod applies controlled tension onto the ribbon, thereby curling it. Several strands of ribbon may be curled simultaneously. The resulting curled ribbon stream passes on to a wire stitcher. The wire stitcher may take hang tags from a hang tag delivery and cutting system to attach individual hang tags to the curled ribbon stream. Alternatively, a backing material or wire tie is used instead of a hang tag. A venturi suction and discharge system may deliver the curled ribbon stream and attached hang tags to a cutter to separate individual curl bows from the ribbon stream. A second nip roller may also be used in place of the venturi suction and discharge system.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: June 3, 2003
    Inventor: Dean S. Hanna
  • Patent number: 6488810
    Abstract: Process and apparatus for influencing web characteristic in a machine for producing a fibrous web. The process includes guiding the fibrous material web in a still-wet state and stretching the still-wet state fibrous material web in a crosswise direction. The apparatus includes a stretching device arranged to stretch the fibrous material web in a still-wet state in a direction crosswise to a travel direction.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: December 3, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: G√ľnter Halmschlager
  • Publication number: 20020093134
    Abstract: An image forming apparatus including a scanner, which includes a guide member provided at an inlet of a clearance formed below a cover of the scanner. The guide member has a substantially pentagonal shape as viewed from the top, and may also include a notch formed in the top portion of the pentagon. The guide member also includes an edge portion curled in a semicircle in an upward direction that is arranged at both sides of the notch. Further, the curled edge portion is inclined from a center of the clearance toward an edge in a length direction. When an original document having a curled leading edge is fed to the scanner, a central portion of the curled leading edge of the original document is placed beneath the edge portion of the guide member.
    Type: Application
    Filed: January 14, 2002
    Publication date: July 18, 2002
    Inventor: Yoshihisa Minakawa
  • Publication number: 20020031569
    Abstract: A setting device for bending layer material is provided, which includes a substantially stationary base frame, a running path defining a running direction and a cross-sectional running plane, and first and second guide faces for guiding the layer material. The first guide face includes a bending face on a bending body and the second guide face includes a deflection face. The first and second guide faces are operationally directly interconnected by the layer material when passing between the first and second guide faces. The bending body includes a bending flank directly connecting to the bending face. The bending flank and the deflection face commonly bound a gap traversed by the layer material and defining a gap width, the bending flank defining a gap plane at the gap from the deflection face up to the bending face. The layer material defines a free length which is not in contact with the deflection and bending faces. Positioning means are included for varying the gap width.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 14, 2002
    Inventor: Markus Mansfeld
  • Patent number: 6331155
    Abstract: A curl bow machine manufactures curl bows in accordance with a curl bow manufacturing process. Ribbon is controllably unwound from spools and prepared for stretching by a curling rod. The curling rod applies controlled tension onto the ribbon, thereby curling it. Several strands of ribbon may be curled simultaneously, with the ensuing curled ribbon stream passed on to a wire stitcher. In a specific embodiment, a wire stitcher takes hang tags from a hang tag delivery and cutting system so that individual hang tags may be attached as by staples to the curled ribbon stream. The wire stitcher forms and attaches such staples to the ribbon and hang tag. In other instances, a backing material or wire tie is used in lieu of a hang tag. In a preferred embodiment, a venturi suction and discharge system then delivers the curled ribbon stream with its attached hang tags to a cutter so that individual curl bows may be separated from the ribbon stream.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: December 18, 2001
    Inventor: Dean S. Hanna
  • Patent number: 6280576
    Abstract: A method and arrangement for drying a paper to be surface-treated, in particular fine paper, in an after-dryer in a paper machine. The paper web is first dried in a forward dryer section of the paper machine by one or more groups with single-wire draw that are open downward on support of a drying wire, the paper web is then finished in a finishing section, e.g., surface-sized or coated, and thereafter, the paper web is dried by an upwardly open inverted group with single-wire draw. In the inverted group with single-wire draw, the tendency of curling formed in the paper web in the forward dryer section can be substantially eliminated and/or compensated for.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: August 28, 2001
    Assignee: Valmet Corporation
    Inventors: Antti Kuhasalo, Pasi Ahonen
  • Patent number: 6282403
    Abstract: The present invention is useful in a nip-forming apparatus including a first roll and a second roll, wherein one of the rolls is displaceable toward the other to control the position of the first roll relative to the second roll, and wherein one of rolls is driven and the other is rotatable. The invention defines a setup procedure that includes rotating the driven roll and sensing a rotational speed of the rotatable roll. While the driven roll is rotating, the displaceable roll is displaced to a home displacement position relative to the other roll, wherein the home displacement position corresponds to a displaced position of the displaceable roll where the rotatable roll rotates at a select speed in response to contact with the driven roll. This home displacement position is then recorded. The invention is particularly well-suited for setup of a sheet decurler in an image forming apparatus. Change in the home displacement position over time due to roll wear is monitored and used to predict roll failure.
    Type: Grant
    Filed: May 2, 2000
    Date of Patent: August 28, 2001
    Assignee: Xerox Corporation
    Inventors: Stan Alan Spencer, Jack G. Elliot, Leonid Buchman
  • Patent number: 6199859
    Abstract: A paper decurling unit in a printer or copier provides a convex or concave path in the paper transport direction. The decurling device is adjustable.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: March 13, 2001
    Assignee: Oce Printing Systems GmbH
    Inventors: Christian Schauer, Helmut Naesser, Georg Boehmer
  • Patent number: 6094560
    Abstract: A moisturizing and decurling apparatus, mountable immediately downstream of a fusing apparatus in an electrostatographic reproduction machine, is provided for removing any curl from a copy sheet in order to produce a high quality toner particle image of an original image on a stable flat copy sheet. The moisturizing and decurling apparatus includes a moisturizing device for applying moisture onto a copy sheet within a critical period of time after the copy sheet passes through the fusing apparatus, and a constraining and stabilizing assembly for constraining and stabilizing the copy sheet into a desired flat condition before the melted toner particles cool below a set critical temperature. The constraining and stabilizing assembly includes a flat vacuum belt assembly for holding flat and transporting the copy sheet before the melted toner particles cool below the set critical temperature.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: July 25, 2000
    Assignee: Xerox Corporation
    Inventor: Kim M. Thomas
  • Patent number: 6064853
    Abstract: An apparatus for straightening material includes a first guide surface and a second guide surface opposite the first guide surface. Pin (20) for pivoting the second guide surface is included, this operating to pivot the second guide surface toward the first guide surface and away from the first guide surface. A spring (22) for biasing the second guide surface toward the first guide surface is also included, with a variable rate characteristic resulting from contact of the spring with a post (34). The variable rate characteristic allows the second guide surface to pivot away from the first guide surface in proportion to a rigidity of the material to be straightened. Material of varying rigidities is passed between the first guide surface and the second guide surface and the apparatus straightens the material for subsequent processing.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: May 16, 2000
    Assignee: Lexmark International, Inc.
    Inventors: Kerry L. Embry, Scott S. Williams
  • Patent number: 6033067
    Abstract: A recording apparatus is capable of preventing both contamination on a recording surface due to a contact of a recording medium on an ink discharging surface even when recording on the recording medium with a concave/convex portion and an ill-discharged state of an ink. The recording apparatus has a feeding unit for feeding a recording medium and a recording head as a recording unit for recording an image on the recording medium fed by the feeding unit. A first guide member (shaft) and a second guide member that serve as a correcting mechanism are provided upstream in a feeding direction from the recording head, for correcting the concave/convex portion of the recording medium.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: March 7, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Kakizaki, Yoji Ara, Tsutomu Shimada, Jun Katayanagi, Takeji Niikura, Shoichi Kan, Nozomu Nishiberi, Yasushi Koike
  • Patent number: 6004432
    Abstract: In a papermaking machine for forming tissue paper, a turning bar is disposed having a curved surface about which a web of tissue paper is turned. The bar has an internal air plenum which supplies air to two sets of holes or slots. The first set is arranged to direct air normal to the curved surface of the bar or in the machine direction, the second set is arranged to direct air toward the edges of the tissue which is turned around the bar. The second holes or slots produce air jets which apply a cross machine direction tension to the web which prevents wrinkling of the web. The first set of holes or slots forms jets of air that prevent the tissue web from contacting the turning bar.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: December 21, 1999
    Assignee: Beloit Technologies, Inc.
    Inventors: Robert E. Page, Brian C. Adamski
  • Patent number: 6002913
    Abstract: A fuser module for a compact printer or copier includes therein a decurler which shares a common drive means with the fuser rolls. The decurler comprises a set of deformable rollers disposed on a decurling roll, the total length of deformable rollers being less than 25% of the effective length of the decurling roll. The module pivots open for jam clearance from either the fuser rolls or decurler.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: December 14, 1999
    Assignee: Xerox Corporation
    Inventors: Robert S. Pawlik, Michael E. Piccirilli, Robert G. Pirwitz, Dennis N. Muck, Dan Salotto
  • Patent number: 5947467
    Abstract: A decurler has an arched plate and a rotatable paper sheet feed roll defining an adjustable gap through which paper sheets driven by the roll exiting a copier or printer apparatus which causes the paper sheet to be curled transversely of the feeding direction, and the gap is selectively adjusted to control the decurling effect dependent upon the extent of the curl in the paper induced by the copying or printing process.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: September 7, 1999
    Inventors: Bradford Billings, Ryan S. Stevenson
  • Patent number: 5920759
    Abstract: An electrophotographic image forming apparatus having a sheet curl correcting mechanism includes: a rotary body including either an endless annular belt or a roller; and a pressing roller for pressing the rotary body, wherein the curled recording sheet on which a toner image is formed is inserted between the rotary body and the pressing roller thereby bending force is applied to the curled recording sheet in a direction opposite to a curl of the curled recording sheet so that the curl is corrected. The apparatus further includes an air flow generator for applying an air flow to a curled recording sheet and the sheet curl correcting mechanism.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: July 6, 1999
    Assignee: Konica Corporation
    Inventors: Takahiko Ushiroji, Ritsuo Fujii
  • Patent number: 5848347
    Abstract: A compact dual decurler mechanism that provides a single straight paper path for achieving bidirectional decurling capability. The dual decurler mechanism consists of two pairs of drive roll and pinch shaft and a camming mechanism for controlling their engagements. The first and the second pairs are oriented in opposite directions in a manner that they can selectively form opposite bending nips for decurling incoming sheets of different curl directions. The operation of the dual decurler can be software controlled through the use of an electric indexing clutch such that, depending on system inputs on image area coverage and the type of finishing device being used, the first pair can be adjusted for toward image (TI) bending, the second pair for away image (AI) bending, or both be set at a neutral setting that keeps both nips open when no decurling is needed. The architecture of the single straight paper path of the dual decurler can minimize paper jams and avoids potential damage to sheets.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: December 8, 1998
    Assignee: Xerox Corporation
    Inventors: Youti Kuo, Ihor Kulbida, Alfred Zielinski, Steven E. Kolb, Roger C. Male
  • Patent number: 5787331
    Abstract: In order to correct curl of a recording sheet, having images recorded on both surfaces thereof, discharged from an image forming apparatus, the amount of a toner on a first surface of the recording sheet is stored in a memory. There is provided a unit for calculating the amount of correction of the curl by comparing the stored amount with the amount of the toner on a second surface of the sheet. In calculating the amount of correction of the curl, the amount of the toner, the kind, the thickness and the size of the sheet, the ambient temperature and humidity, and the like are used.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: July 28, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiko Ohkuma, Kiyoharu Tanaka, Tooru Matsuyama
  • Patent number: 5637070
    Abstract: This invention relates to a curl correcting device comprising a sheet transport path, an opening member openable from a main body of the device, for opening the sheet transport path, transport means for transporting a sheet along the sheet transport path, a first guide member for guiding the sheet transported by the sheet transport means, a second guide member for guiding the sheet transported by the sheet transport means and correcting the curl of the sheet in cooperation with the first guide member, and moving means for moving at least one of the first and second guide members to a position not correcting the curl tendency, in a state in which the opening member is closed.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 10, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Keizo Sasai
  • Patent number: 5580588
    Abstract: An apparatus for transporting and/or decurling a strip of photosensitive material. The apparatus includes a plurality of rollers and a drum. A belt is wrapped about the plurality of rollers and are positioned such that the belt forms a receiving pocket for holding and retaining the drum and for rotating the drum about its axis. At least one of the plurality of rollers being connected to a drive mechanism so as to move the belt about the rollers so as to cause the drum to rotate about its axis of rotation. The belt is in direct contact with the outer surface of the drum for a predetermined distance about the circumference of the drum forming a first film path. The first film path has an entrance for receiving film and an exit for allowing film to leave the film path. A heater may be provided which is associated with the heating drum for heating the drum to a predetermined temperature.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: December 3, 1996
    Assignee: Eastman Kodak Company
    Inventors: William J. Greene, Robert J. Matoushek, Harry A. Gorman, John G. Weigand
  • Patent number: 5572308
    Abstract: The present invention relates to an image forming apparatus in which a sheet is carried by a sheet carrier to form an image, and the sheet, on which the image has been formed, is again supplied to the sheet carrier by a re-supply unit to again form an image on the sheet.An object of the present invention is to improve a sheet conveying apparatus to enable a sheet again supplied by a re-supply unit to be easily carried by a sheet carrier.To achieve the object, the image forming apparatus according to the present invention has a curl forming unit for curling a sheet, which is being again supplied by the re-supply unit, in a direction in which the sheet can easily be carried by the sheet carrier.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: November 5, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Suda, Junichi Sata
  • Patent number: 5565971
    Abstract: A pivotal, bi-directional decurler that changes sheet bending direction from an away from image to a toward image direction includes a decurler support structure that is mounted for bi-directional movement by a cam mechanism. A belt member is entrained around two support rollers that are supported by the decurler support structure with an unsupported span between the rollers. A pinch roll is adapted to form a nip with the unsupported span of the belt to provide away from image bending of copy sheets when the cam mechanism is rotated into a first position. An elastomer coated rotating shaft positioned downstream of the away from image nip cooperates with a bending baffle when the cam mechanism is rotated into a second position to provide toward image bending of copy sheets.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: October 15, 1996
    Assignee: Xerox Corporation
    Inventors: Youti Kuo, James F. Smoak, Curtis Arline, Jr.
  • Patent number: 5555083
    Abstract: A decurler for reducing cross curl in sheets includes at least one grooved elastomer transport belt and a ribbed pinch shaft. The ribs of the decurler shaft extend into the grooves in the belt to provide one-sided corrugations to a passing sheet and provide distributed localized bending of the copy sheet in the area of the belt grooves. Distributed local bending in the cross direction, as well as, in the wrap in the process direction around the ribbed decurler shaft provide cross curl reduction in the process direction.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: September 10, 1996
    Assignee: Xerox Corporation
    Inventors: Youti Kuo, James F. Smoak
  • Patent number: 5519481
    Abstract: An apparatus for adaptive localized sheet decurling in an electrophotographic printing machine. A segmented decurling device forms a drive nip with an elastically deformable surfaced roll. A plurality of sensors are provided to determine the basis weight of the copy sheet, the density of the image being transferred to the copy sheet and fused thereon, the relative humidity of the machine environment, the process speed of the print engine, and any other relevant parameters. Signals indicative of these parameters are generated and sent to the machine controller which processes these signals to determine the degree of curl expected in a sheet. Based on the degree of of curl for each sheet section corresponding to a decurler segment, the decurler segment is actuated to a setting which should provide the proper amount of mechanical decurling force. Each segment is activated only for the duration deemed necessary to decurl the imaged sheet portion corresponding thereto.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: May 21, 1996
    Assignee: Xerox Corporation
    Inventor: Youti Kuo
  • Patent number: 5515152
    Abstract: A decurler apparatus in a machine changes sheet bending direction away from image (AI) to toward image (TI) direction by use of tandem gates and bending baffles to direct copy papers to different decurling paths to reduce copy curl. A controller automatically determines the optimum decurling path for an individual copy paper according to sensor inputs derived from the paper basis weight, color layers, image area coverage and relative humidity. An operator control feature is included that allows operators to reduce output curl of out-of-specification papers through push-buttons on a machine control panel.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: May 7, 1996
    Assignee: Xerox Corporation
    Inventor: Youti Kuo
  • Patent number: 5414503
    Abstract: An apparatus for adaptive sheet decurling in an electrophotographic printing machine. A plurality of sensors are provided to determine the basis weight of the copy sheet, the density of the image being transferred to the copy sheet and fused thereon, the relative humidity of the machine environment, the process speed of the print engine, and any other relevant parameters. Signals indicative of these parameters are generated and sent to the machine controller which processes these signals and predicts the degree and direction of curl expected in a sheet. Based on the degree of and direction of curl, a bidirectional variable penetration decurler is actuated to a setting which should provide the proper amount of mechanical decurling force.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: May 9, 1995
    Assignee: Xerox Corporation
    Inventors: Robert P. Siegel, Youti Kuo, Edward C. Hanzlik
  • Patent number: 5407417
    Abstract: A ribbon curling device to facilitate the curling of a length of decorative ribbon such as gift wrapping ribbon includes a housing for storing the ribbon, a curling edge associated with an exit aperture in a wall of the housing, and a guide spaced from the curling edge to guide the ribbon to the curling edge and determine the approach angle of the ribbon to the curling edge to facilitate the curling of the ribbon as it is drawn along the curling edge. The guide is further provided with an integral drag surface for imparting a frictional drag on a portion of the ribbon as it is drawn along the guide. The ribbon curling device includes several alternative mechanisms for varying the approach angle of the ribbon to the curling edge to thereby vary the amount of curl to the ribbon, including a variable length guide edge, a ribbon guide movable with respect to the curling edge, and a rotatable guide cam having a number of guide faces.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: April 18, 1995
    Inventor: Fredric Goldstein
  • Patent number: 5392106
    Abstract: A decurling apparatus and method to decurl a substrate in a xerography machine. The invention combines a decurling apparatus having a penetration roller with a small diameter penetrating into a belt. The penetration roller is adjustable and as it pushes into the belt, more decurling of a copy sheet will occur. A controller determines the amount of decurling that is necessary and sends an electrical signal to a driver which operates the penetration roller. The penetration roller is either pressed into or away from the decurling belt. A cam shaft is turned by a motor to cause the cams to move the penetration roller. Although the controller stores the information on the cam location, a home sensor is required to indicate home position. The cam shaft is returned to home position before adjusting the penetration roller to a new level of decurling.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: February 21, 1995
    Assignee: Xerox Corporation
    Inventors: John J. Bigenwald, Robert A. Bohli