Internally Heated Roll Patents (Class 432/60)
  • Patent number: 10613456
    Abstract: A fixing device includes a heating member, a pressing member, and a guide portion. The heating member heats a toner image and includes an elastic body. The pressing member presses a recording medium against the heating member. The guide portion does not contact with the heating member, and guides the recording medium ejected from a nip of the heating member and the pressing member. The distance from an exit of the contact portion to an end portion of the guide portion adjacent the contact portion differs in accordance with the position in the longitudinal direction of the heating member. The distance at a position at which the pressure between the heating member and the pressing member is low is longer than the distance at a position at which the pressure between the heating member and the pressing member is high.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: April 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Kyogo Soshi
  • Patent number: 9678459
    Abstract: A first stretch roller stretches a secondary transfer belt at a position where a tip in a conveying direction of a recording medium being conveyed through a secondary transfer portion can reach. The first stretch roller has a circumferential surface formed into a normal crown shape in which a straight area where a diameter of the first stretch roller is constant is provided at a center part in a direction of axis of rotation. A second stretch roller has a circumferential surface formed into an inverse crown shape in which a straight area where a diameter of the second stretch roller is constant is provided at a center part in a direction of axis of rotation.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: June 13, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenji Suzuki
  • Patent number: 9280101
    Abstract: An image forming apparatus includes: a fixing portion for fixing an image formed on a recording material; and a guide member for guiding the recording material. The guide member is provided at an entrance to the fixing portion and at an end portion with respect to a direction perpendicular to a feeding direction of the recording material The guide member is moved when the guide member is pushed by the recording material.
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: March 8, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomooku Koyama, Ken Murooka, Wataru Uchida, Jun Agata, Yohei Suzuki, Daisuke Takamura
  • Patent number: 9116485
    Abstract: In an image forming apparatus, a heating member for heating a recording sheet and a pressuring member disposed below the heating member are supported by a fixing unit frame. A noncontact temperature sensor disposed facing the heating member detects a temperature of the heating member without contacting the heating member. An upper frame covers an upper portion of the heating member and an upstream portion of the heating member in a conveying direction of the recording sheet. A plate-shaped upper sheet guide protrudes upstream in the conveying direction from an upstream end of the upper frame and extends in a width direction perpendicular to the conveying direction and to a vertical direction. The upper sheet guide and a lower sheet guide disposed below and facing the upper sheet guide the recording sheet in the conveying direction toward the heating member and the pressuring member.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: August 25, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masaki Yasuda, Noboru Suzuki
  • Patent number: 9090424
    Abstract: A web-guiding system for guiding a web of media along a transport path comprising a drive roller rotated by a motor and a plurality of nip rollers. The drive roller includes a first section, a second section and a third section along the length of the roller, the second section being located between the first section and the third section. A diameter of a surface envelope around the exterior surface of the drive roller is substantially constant within the second section, and is larger in the first section and the third section than in the second section. The nip rollers are aligned with the second section of the drive roller, with the web of media passing between the drive roller and the nip rollers.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: July 28, 2015
    Assignee: EASTMAN KODAK COMPANY
    Inventors: Randy Eugene Armbruster, Christopher M. Muir, Bradley Stephen Bush, W. Charles Kasiske, Jr.
  • Patent number: 9075363
    Abstract: An approach is provided for reducing release agent transfer to a pressure member in a fuser. The approach involves causing, at least in part, at least a first sheeted substrate and a second sheeted substrate to be advanced through a fuser in a process direction. The approach also involves determining the presence of the first sheeted substrate at a fusing position. The approach further involves causing, at least in part, a fuser member and a pressure member to engage to form a fusing nip at the fusing position based, at least in part, on the determined presence of the first sheeted substrate at the fusing position. The approach additionally involves determining the first sheeted substrate has advanced through the fusing nip. The approach further involves causing, at least in part, the fuser member and the pressure member to disengage.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: July 7, 2015
    Assignee: Xerox Corporation
    Inventors: Melissa Ann Monahan, Erwin Ruiz, Steven Russel, Jeffrey Nyyssonen Swing, Christopher Alan Jensen
  • Patent number: 8892018
    Abstract: A fixing device includes a heat roller and a heater. The heat roller extends in an axial direction and includes a cylindrical-shaped roller section and a coil, the roller section having an inner peripheral surface defining an internal space therewithin and the coil being wound along the inner peripheral surface, the heat roller being configured of a plurality of zones in the axial direction, the plurality of zones including a low zone whose heat capacity is less than a predetermined value and a high zone whose heat capacity is not less than the predetermined value. The heater is disposed within the internal space of the roller section and has a heating wire configured to generate heat, the heating wire having at least a first portion which is in confrontation with the high zone and a second portion which is in confrontation with the low zone, and the heating wire being configured such that the first portion has an amount of heat generation greater than an amount of heat generation at the second portion.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: November 18, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Noboru Suzuki
  • Patent number: 8655249
    Abstract: A belt-roll fuser system includes a belt-roll fuser module that is movable to engage and disengage to a main frame of the belt-roll fuser system. The belt-roll fuser has an internal pressure member that defines a fusing nip with an external pressure member of the main frame when the belt-roll fuser module is engaged. The belt-roll fuser module is movable by a latch, and when engaged, a nip load path crosses through a point at which the latch attaches to the belt-roll fuser module.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: February 18, 2014
    Assignee: Xerox Corporation
    Inventors: Augusto E. Barton, Paul M. Fromm, William A. Burton, Stephen B. Williams, Brian J. Dunham
  • Patent number: 8306449
    Abstract: In a roller to affect a temperature of a print substrate in a digital printer, a hollow roll is mounted to a shaft. Channels are provided for a heat transport medium in the hollow wall. A roller shell of the hollow roll is comprised of arc-shaped segments extending over a width of the hollow roll. The segments end laterally in arms designed so that the arms of adjacent segments are connected to each other. The channels extend over the width of the hollow roll and are assembled respectively from the segments of the roller shell. A respective covering plate is clamped between the arms of the respective segments.
    Type: Grant
    Filed: February 10, 2010
    Date of Patent: November 6, 2012
    Assignee: Océ Printing Systems GmbH
    Inventor: Juergen Stresau
  • Patent number: 7754039
    Abstract: The present invention provides a manufacturing method of a compressible printing layer, comprising a vulcanizing step comprising a first heating process in which one surface of a compressible printing layer including an unvulcanized compressible layer containing microcapsules is heated by bringing the one surface of the compressible printing layer into contact with the surface of at least one heated metal roll while applying tension to the compressible printing layer, and a second heating process in which the other surface of the compressible printing layer is heated by bringing the other surface of the compressible printing layer into contact with the surface of at least one heated metal roll while applying tension to the compressible printing layer.
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: July 13, 2010
    Assignee: Kinyosha Co. Ltd.
    Inventors: Yoshiharu Ogawa, Akiyoshi Inoue, Atsuo Sato, Shigeru Uchioke
  • Patent number: 7582344
    Abstract: A heat roller having a cylindrical sheet-like heating element having a resistance member embedded in an insulating member. The sheet-like heating element is arranged between an inner tube and an outer tube. The outer tube is formed so as to be longer than the inner tube for reducing non-uniformity in heat of the heat roller. Further, a thermal expansion coefficient of a material of the outer tube is greater than that of a material of the inner tube. Moreover, a triple-tube heat roller is provided.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: September 1, 2009
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Mitsuhiro Mori, Koichi Sanpei, Masatoshi Kimura, Masao Konishi
  • Patent number: 7511249
    Abstract: Provided is a printing device comprising a hot roller having an inside surface and an outside surface. A heating element is present within the hot roller. The inside surface has a first region, wherein the first region is coated with a first type of material. The inside surface has a second region, wherein the second region is coated with the first type of material, and wherein second region is of a different dimension than the first region. The inside surface has a third region, wherein the third region is coated with a second type of material.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: March 31, 2009
    Assignee: Infoprint Solutions Company, LLC
    Inventors: Carlton E. Begeal, Christopher Raymond Henderson, Laurie Yoshiko Takemori, John Uhlenbrock, Jason Cole Jackson
  • Patent number: 7427727
    Abstract: A fixing apparatus and an image formation apparatus are disclosed. The fixing apparatus includes two or more heaters with temperature detecting function that generate heat with electric current and detect temperature; a heating unit that includes the heater with the temperature detecting function; a film, a surface of which slides on the heating unit; a thermal fixing unit that is heated by the heating unit through the film for fusing a toner image that is yet-to-be fixed on a recording paper at a predetermined fixing temperature; a pressurization roller for pressing the recording paper to the thermal fixing unit; and a temperature control unit for controlling the temperature of the heater to be a predetermined temperature based on the temperature of the heater detected by the heater with the temperature detecting function.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: September 23, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Koide, Hitoshi Hattori, Motokazu Yasui, Takashi Fujita, Hirokazu Ikenoue
  • Patent number: 7253378
    Abstract: A base sheet is spanned over a lower roller, and an upper roller pulls a cover sheet along a path and presses it against the base sheet at the lower roller. A preheater housing along the path upstream of the rollers is formed with a chamber open toward the path. A radiant heater in the chamber is directed transversely at the path so as to heat the cover sheet passing along the path. A sensor along the path adjacent the chamber detects atmosphere around the chamber and generates an output when the detected atmosphere indicates an unsafe hot condition of the cover sheet. A shutter can shift between a retracted position offset from the chamber and an advanced position closing the chamber. A controller connected to the sensor shifts the shutter from the retracted position to the advanced position when the output is generated by the sensor.
    Type: Grant
    Filed: September 2, 2005
    Date of Patent: August 7, 2007
    Assignee: Uhlmann Pac-Systeme GmbH & Co. KG
    Inventors: Detlev Gertitschke, Bernd Zoller, Jörg Knüppel
  • Patent number: 7128802
    Abstract: The present invention provides a manufacturing method of a compressible printing layer, comprising a vulcanizing step comprising a first heating process in which one surface of a compressible printing layer including an unvulcanized compressible layer containing microcapsules is heated by bringing the one surface of the compressible printing layer into contact with the surface of at least one heated metal roll while applying tension to the compressible printing layer, and a second heating process in which the other surface of the compressible printing layer is heated by bringing the other surface of the compressible printing layer into contact with the surface of at least one heated metal roll while applying tension to the compressible printing layer.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: October 31, 2006
    Assignee: Kinyosha Co., Ltd.
    Inventors: Yoshiharu Ogawa, Akiyoshi Inoue, Atsuo Sato, Shigeru Uchioke
  • Patent number: 6979802
    Abstract: A preheat chamber for conditioning an imaging material having a conditioning threshold temperature and a developing threshold temperature. The preheat chamber includes a chamber housing and a heating system. The heating system is configured to heat imaging material to a desired conditioning temperature above the conditioning threshold temperature and below the developing threshold temperature as the imaging material is moved through the chamber housing.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: December 27, 2005
    Assignee: Eastman Kodak Company
    Inventors: Kent R. Struble, Duane A. Preszler
  • Patent number: 6969252
    Abstract: A heating device is used in an image forming apparatus. In the heating device, a resin layer is provided between a core metal of a fixing roller and a ball bearing. The resin layer is adhered to the core metal so as to obviate a noise, caused by a rubbing of the resin layer against a ball bearing, which is otherwise produced when the resin layer is provided as a separate part. Between the resin layer and the ball bearing, a material of the resin layer is selected and the resin layer is configured to have a rough surface with a coefficient of dynamic friction of the surface of the resin which is a predetermined value, and thereby minimizing the production of the noise.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: November 29, 2005
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideo Nagafuji
  • Patent number: 6907219
    Abstract: Fusing equipment of an image forming apparatus, includes: a fusing roller fixing a toner image on a printer paper and comprising a supporting layer formed at an inner portion of the fusing roller, a separating layer formed at an outermost portion of the fusing roller, an a heating layer formed between the supporting layer and the separating layer to supply heat; a thermistor detecting a temperature of the fusing roller to control the heating layer; and a pressing roller pressing the printing paper against an end of the fusing roller during a rotational movement of the fusing roller while being in contact with the fusing roller.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: June 14, 2005
    Assignee: Samsung Electronics Co., LTD
    Inventors: Yong-geun Kim, Cheol-young Han
  • Patent number: 6902394
    Abstract: An apparatus for aiding the removal of an adhesively coated web disposed upon the surface of a rotating roll is disclosed. The apparatus includes a movable belt disposed about at least a portion of the surface of the roll and defining a contact region. The belt has a temperature that is different from the temperature of the roll so that as the adhesively coated web passes between the surface of the roll and the belt within the contact region, the web is cooled.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: June 7, 2005
    Assignee: The Procter & Gamble Company
    Inventors: William J. Butsch, John William Toussant
  • Patent number: 6901226
    Abstract: In a xerographic printer including a fuser having a heating element, a first predetermined power level is applied to the heating element. The voltage associated with the heating element is measured, yielding an output code which is applied to a look-up table. The output of the look-up table relates to power to be applied to the heating element in a time interval T going forward: the output sets forth what power level is to be applied to the heating element for a smaller interval t within interval T, and what power level is to be applied to the heating element for the balance of the interval T.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: May 31, 2005
    Assignee: Xerox Corporation
    Inventor: Franciscus Gerardus Johannes Claassen
  • Patent number: 6882804
    Abstract: A printer fuser with a plurality of separately powerable heating zones along its length for permitting variably controllable heat application to a medium.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: April 19, 2005
    Assignee: Hewlett-Packard Development Company, LP.
    Inventor: Eric Unger Eskey
  • Patent number: 6857871
    Abstract: A method and apparatus for zone controlling the temperature of a rotating roll. The apparatus includes a roll having a surface at a first temperature and a belt disposed adjacent at least a portion of the surface of the roll. The belt contacts the roll surface in a contact region and has a second temperature that is different from the first temperature of the roll such that the belt affects a temperature change in at least a portion of the surface of the roll in the contact region as the roll is rotated.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: February 22, 2005
    Assignee: The Procter & Gamble Company
    Inventors: William J. Butsch, John William Toussant
  • Patent number: 6853833
    Abstract: A fusing device for an electrophotographic image forming apparatus includes a fusing roller which includes a tubular heat pipe, both ends of which are sealed and in which a predetermined amount of a working fluid is contained, a cylindrical roller which surrounds the heat pipe, and a heater which is installed between the cylindrical roller and the heat pipe, and a pressing roller which presses a sheet of paper passing between the pressing roller and the fusing roller. A rubber layer having a predetermined thickness is formed on a surface of the cylindrical roller so as to form a fusing nip with the paper.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: February 8, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Durk-hyun Cho, Kwang-young Chung
  • Patent number: 6847798
    Abstract: A fusing device for an electrophotographic image forming apparatus. The fusing device includes a heat pipe, both ends of which are sealed and in which a predetermined amount of a working fluid is contained, a cylindrical roller which surrounds the heat pipe, and a heating element which is installed between the cylindrical roller and the heat pipe. The working fluid is supercooled at room temperature, and crystallizing and producing heat when acted on by a mechanical force, and at least one mechanical unit applies a mechanical force to the heat pipe and crystallizes the supercooled working fluid.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: January 25, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Durk-hyun Cho, Hwan-guem Kim, Narbut Aleexandr
  • Publication number: 20040175211
    Abstract: A fixing apparatus comprises a fixing device which fixes a developer image by passing a toner image fixing material between a heating rotary body and a pressing rotary body which are pressed and contacted, wherein at least one of the heating rotary body and pressing rotary body has an elastic foam layer with a rubber hardness of 20-50 degrees, and a conductor layer formed on the surface of the elastic foam layer.
    Type: Application
    Filed: March 5, 2003
    Publication date: September 9, 2004
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Toshihiro Sone, Osamu Takagi, Satoshi Kinouchi, Yoshinori Tsueda
  • Publication number: 20040146324
    Abstract: An image fixing device of an image forming apparatus includes a pressure roller and a heating roller to rotate as if it is in contact with the pressure roller, with a paper fed therebetween, to fix a developed image to the paper by applying heat generated by a heating member installed inside therein. The heating roller is a heat pipe of a closed tube type. The heat pipe of the closed tube type has a fluid poured inside of a closed space thereof. The heating member is an induction heating body to generate a magnetic field to the heating roller. The heat generated by induction heating is applied to the heating roller including the heat pipe to keep a temperature around the surface thereof at a predetermined uniform level.
    Type: Application
    Filed: July 24, 2003
    Publication date: July 29, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventor: In-gu Kwak
  • Publication number: 20040141777
    Abstract: A fusing device for an electrophotographic image forming apparatus. The fusing device includes a heat pipe, both ends of which are sealed and in which a predetermined amount of a working fluid is contained, a cylindrical roller which surrounds the heat pipe, and a heating element which is installed between the cylindrical roller and the heat pipe. The working fluid is supercooled at room temperature, and crystallizing and producing heat when acted on by a mechanical force, and at least one mechanical unit applies a mechanical force to the heat pipe and crystallizes the supercooled working fluid.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 22, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventors: Durk-hyun Cho, Hwan-guem Kim, Narbur Alexandr
  • Publication number: 20040141778
    Abstract: A fusing device for an electrophotographic image forming apparatus. The fusing device includes a fusing roller with an outer rubber roller, a heating pipe, both ends of which are sealed and in which a predetermined amount of a working fluid is contained, a heater which is placed on the heat pipe, and a pressing roller which closely adheres paper passing between the pressing roller and the fusing roller to the fusing roller.
    Type: Application
    Filed: July 24, 2003
    Publication date: July 22, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventors: Hwan-Guem Kim, Durk-hyun Cho
  • Publication number: 20040131400
    Abstract: A fusing device for an electrophotographic image forming apparatus includes a fusing roller which includes a tubular heat pipe, both ends of which are sealed and in which a predetermined amount of a working fluid is contained, a cylindrical roller which surrounds the heat pipe, and a heater which is installed between the cylindrical roller and the heat pipe, and a pressing roller which presses a sheet of paper passing between the pressing roller and the fusing roller. A rubber layer having a predetermined thickness is formed on a surface of the cylindrical roller so as to form a fusing nip with the paper.
    Type: Application
    Filed: July 23, 2003
    Publication date: July 8, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventors: Durk-Hyun Cho, Kwang-Young Chung
  • Publication number: 20040126728
    Abstract: A heating device is used in an image forming apparatus. In the heating device, a resin liver is provided between a core metal of a fixing roller and a ball bearing. The resin layer is adhered to the core metal so as to obviate a noise, caused by a rubbing of the resin layer against a ball bearing, which is otherwise produced when the resin layer is provided as a separate part. Between the resin layer and the ball bearing, a material of the resin layer is selected and the resin layer is configured to have a rough surface with a coefficient of dynamic friction of the surface of the resin which is a predetermined value, and thereby minimizing the production of the noise.
    Type: Application
    Filed: November 12, 2003
    Publication date: July 1, 2004
    Inventor: Hideo Nagafuji
  • Patent number: 6733284
    Abstract: A method and apparatus for zone controlling the temperature of a rotating roll. The apparatus includes a roll having a surface at a first temperature and a belt disposed adjacent at least a portion of the roll. The belt contacts the roll surface in a contact region and has a second temperature that is different from the first temperature of the roll such that the belt affects a temperature change in at least a portion of the surface of the roll in the contact region as the roll is rotated.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: May 11, 2004
    Assignee: The Procter & Gamble Company
    Inventors: William J. Butsch, John William Toussant
  • Publication number: 20040058294
    Abstract: A method and apparatus for zone controlling the temperature of a rotating roll. The apparatus includes a roll having a surface at a first temperature and a belt disposed adjacent at least a portion of the surface of the roll. The belt contacts the roll surface in a contact region and has a second temperature that is different from the first temperature of the roll such that the belt affects a temperature change in at least a portion of the surface of the roll in the contact region as the roll is rotated.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 25, 2004
    Inventors: William J. Butsch, John William Toussant
  • Publication number: 20040047660
    Abstract: A heating roller of a fixing apparatus capable of blocking power to a heating roller when temperature rises over a predetermined temperature. The heating roller comprises an OFC pipe, a heating coil disposed to cover an outer circumference of OFC pipe, an aluminum pipe covering an outer circumference of heating coil, an insulator to cover a surface of heating coil and separate the heating coil from contact with OFC pipe and aluminum pipe, and an electrode installed at both ends of the aluminum pipe and having a terminal in electrical contact with the heating coil that melts when its temperature rises above a predetermined temperature. The heating roller further comprises a brush which contacts an outside surface of the electrode to provide AC power to the electrode. Accordingly, when the temperature of the heating coil rises above a predetermined temperature, the terminal of the electrode melts and thus discontinues the supply of AC power from the brush to the heating coil.
    Type: Application
    Filed: April 14, 2003
    Publication date: March 11, 2004
    Inventors: Hwan-Guem Kim, Durk-Hyun Cho
  • Publication number: 20040042826
    Abstract: A fusing device of an electrophotographic image forming apparatus includes a fusing unit which includes a heating portion, a fixing frame which fixes and supports the heating portion at one side, and a fusing film sliding along a circumference of the fixing frame, and a pressing roller which presses the fusing film to the heating portion to slide the fusing film. The heating portion is installed in contact with the pressing roller and forms a fusing nip portion having a predetermined width.
    Type: Application
    Filed: June 23, 2003
    Publication date: March 4, 2004
    Applicant: SAMSUNG Electronics Co., Ltd.
    Inventors: Durk-Hyun Cho, Hwan-Geum Kim
  • Patent number: 6701120
    Abstract: A heating device is used in an image forming apparatus. In the heating device, a resin layer is provided between a core metal of a fixing roller and a ball bearing. The resin layer is adhered to the core metal so as to obviate a noise, caused by a rubbing of the resin layer against a ball bearing, which is otherwise produced when the resin layer is provided as a separate part. Between the resin layer and the ball bearing, a material of the resin layer is selected and the resin layer is configured to have a rough surface with a coefficient of dynamic friction of the surface of the resin which is a predetermined value, and thereby minimizing the production of the noise. The outer diameter of the portion of the heat roller supported by the bearing is larger than the portion of the heat roller that contacts a heated member.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: March 2, 2004
    Assignee: Ricoh Company, Ltd.
    Inventor: Hideo Nagafuji
  • Patent number: 6690907
    Abstract: A fusing apparatus of an electrophotographic image forming apparatus includes an internal pipe having a tubular body portion and end portions integrally formed with the body portion at both ends of the body portion, a heat-generating portion installed to wrap the body portion to be in close contact with the body portion without a gap and to generate heat, and a fusing roller installed to wrap the heat-generating portion. The fusing apparatus provides a perfect contact between the heat-generating portion and the internal pipe, thereby maintaining an entire surface of the fusing roller at a uniform temperature without a temperature deviation. Therefore, an optimal efficiency in fixing a toner image on printer paper can be achieved.
    Type: Grant
    Filed: October 10, 2002
    Date of Patent: February 10, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyung-woo Lee
  • Publication number: 20040001731
    Abstract: A direct heating type of fusing equipment of an image forming apparatus includes a fusing roller that has a supporting layer formed inside of the fusing roller, a separating layer formed on an outermost portion of the fusing roller, and a heating layer formed between the supporting layer and the separating layer to supply heat; a thermistor being in contact with an outermost surface of the fusing roller to detect a temperature of the surface of the fusing roller; and a pressing roller pressing a printing paper against the fusing roller while rotating together with the fusing roller and being in contact therewith. The heating layer includes a hot wire wound around an outer circumference of the supporting layer; an insulating material formed between the supporting layer and the hot wire; and an insulation resilient layer disposed in a first gap formed between windings of the hot wire created after the winding of the hot wire and also disposed in a second gap formed between the hot wire and the separating layer.
    Type: Application
    Filed: April 23, 2003
    Publication date: January 1, 2004
    Applicant: SAMSUNG Electronics Co., Ltd. of Republic of Korea
    Inventors: Yong-geun Kim, Cheol-young Han
  • Patent number: 6661990
    Abstract: A compact long nip fusing apparatus including (a) a frame; (b) a rotatable first member for mounting to the frame; (c) a heat source for heating the rotatable first member; and (d) a rotatable and compressable pneumatic member forming a long fusing nip against the rotatable first member for contacting and fusing a fusible image.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: December 9, 2003
    Assignee: Xerox Corporation
    Inventor: Robert G. Pirwitz
  • Patent number: 6661992
    Abstract: A fusing roller of an electrophotographic image forming apparatus is provided. The fusing roller includes an internal pipe having enclosed both ends in which a vacuum state of predetermined pressure is maintained and a predetermined amount of working fluid is stored, a fusing portion installed to surround the internal pipe, and a heating portion comprised of a helical resistance heating coil which is installed between the fusing portion and the internal pipe and generates heat. The distance between windings becomes smaller at the ends of the fusing roller than at the center to compensate for the higher dissipation of heat at the ends of the fusing roller than at the center. The result is a fusing roller that can quickly heat up and that has a uniform temperature along the surface of the fusing roller from end to end.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: December 9, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyung-woo Lee
  • Publication number: 20030202828
    Abstract: A structurally improved fusing roller assembly based on the heat pipe principle is provided. The fusing roller assembly includes a fusing roller and a heat pipe coaxially mounted inside the fusing roller. A resistance heater is helically wound around the exterior cylindrical surface of the heat pipe, and rests between the inner cylindrical surface of the fusing roller and the exterior cylindrical surface of the hat pipe. The heat pipe is hermetically sealed with a quantity of a working fluid contained inside. The surface of fusing roller can be instantaneously heated up to a target fusing temperature. The fusing roller assembly can be heated up to a target fusing temperature within a shorter period of time without need for warm-up and stand-by period, so that power consumption decreases.
    Type: Application
    Filed: June 5, 2003
    Publication date: October 30, 2003
    Inventor: Kyung-woo Lee
  • Publication number: 20030190177
    Abstract: A fusing and fixing unit used with an image forming apparatus including a fusing roller and an infrared heat source. The fusing roller has a main member that has hollow portions therein and is made of an opaque material and an infrared absorbent layer that is formed on the inner surface of the main member. The infrared heat source is installed inside the fusing roller and generates radiant heat having an infrared wavelength. Since the image forming apparatus uses an infrared heat source having a high efficiency of radiating heat as a heat source, a warm-up period can be greatly reduced. Also, since the main member of the fusing roller is formed of an opaque material, in particular, a metallic material, the image forming apparatus can be strong, low-priced, and have a large diameter.
    Type: Application
    Filed: January 14, 2003
    Publication date: October 9, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Yong-geun Kim, Cheol-young Han
  • Patent number: 6631252
    Abstract: An object of the present invention is to provide a fixing apparatus that has a fixing rotator in contact with a recording material supporting an unfixed image, a pressure rotator in pressure contact with the fixing rotator, a support member supporting the pressure rotator and swingable around a plurality of fulcrums, an elastic member for biasing the support member so that the pressure rotator is biased to the fixing rotator, and pressure contact force changing device for changing a pressure contact force by swinging the support member against the biasing force of the elastic member, wherein the pressure contact force changing device can change the pressure contact force while the pressure rotator is in pressure contact with the fixing rotator.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: October 7, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masao Ando, Takahiro Azeta
  • Publication number: 20030143003
    Abstract: A fuser assembly and associated method for an electrophotographic machine. The fuser assembly is preferably detachable and intended for use as a second or external fuser assembly. The fuser assembly contemplated may be used as a backup or a complimentary fuser assembly. An electrophotographic machine may include or be adapted to include a detachable or complimentary fuser assembly. Also, a method of electrophotographic printing or copying using a second or external fuser assembly.
    Type: Application
    Filed: January 25, 2002
    Publication date: July 31, 2003
    Inventor: Gary G. Stringham
  • Publication number: 20030133085
    Abstract: Two transparent plates constitute with each other an angle variable from about 60 to 120 degrees along their common edge. A book to photograph is opened at the chosen pages and placed sitting on said common edge. A photographic camera is attached near the free edge of one of the plates through a supporting element in such a way that the optical axis of the camera stays perpendicular to the one plate. A first planar mirror, which has one edge in common with the common edges of the transparent plates, is maintained exactly in the middle of the angle formed by the transparent plates but can be folded against the one plate. A second mirror which has one edge in common with the one plate near its free edge, is maintained perpendicular to the reference position of the first mirror.
    Type: Application
    Filed: January 14, 2003
    Publication date: July 17, 2003
    Inventors: Oleg B. Tretiakoff, Andrea B. Tretiakoff
  • Publication number: 20030129007
    Abstract: A compact long nip fusing apparatus including (a) a frame; (b) a rotatable first member for mounting to the frame; (c) a heat source for heating the first rotatable member; and (d) a rotatable and compressable pneumatic member forming a long fusing nip against the first rotatable member for contacting and fusing a fusible image.
    Type: Application
    Filed: January 9, 2002
    Publication date: July 10, 2003
    Applicant: Xerox Corporation
    Inventor: Robert G. Pirwitz
  • Patent number: 6589048
    Abstract: A roller for use in a fuser assembly of a reproduction apparatus adapted to operate at an elevated temperature up to in the range of approximately 750° F. The roller includes a generally elongated substantially cylindrical tube. End gudgeons are provided for sealing the ends of the cylindrical tube. Each of the end gudgeons is respectively associated with an end of the cylindrical tube such that after a weld joint is formed between the cylindrical tube and the end gudgeon, the end gudgeon provides a compression joint to prevent the cylindrical tube from separating from the end gudgeon, due to material creep, at elevated operating temperatures.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: July 8, 2003
    Assignee: NexPress Solutions LLC
    Inventors: Allen Kass, Terence Michael Miller, Rainer J. Bleil, Jiann-Hsing Chen
  • Patent number: 6582222
    Abstract: A fusing station including an externally heated deformable fuser roller and a relatively harder pressure roller, the fuser roller including a heat distribution layer. A fuser roller embodiment includes a core member, a base cushion layer around the core member, a heat storage layer around the base cushion layer, a heat distribution layer around the heat storage layer, and a thin gloss control layer around the heat distribution layer. Ratios of thermal conductivity divided by thickness for the layers are, respectively: for the base cushion layer, less than approximately 13.3 BTU/hr/ft2/°F.; for the heat storage layer, approximately between 300 BTU/hr/ft2/°F.-1400 BTU/hr/ft2/°F.; for the heat distribution layer, approximately between 600 BTU/hr/ft2/°F.-4,800 BTU/hr/ft2/°F.; and, for the gloss control layer, approximately between 600 BTU/hr/ft2/°F.-6,000 BTU/hr/ft2/°F.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: June 24, 2003
    Assignee: Nexpress Solutions LLC
    Inventors: Jiann-Hsing Chen, Joseph Pavlisko, Robert A. Lancaster, Nataly Boulatnikov
  • Patent number: 6571080
    Abstract: A structurally improved fusing roller assembly based on a heat pipe principle is provided. The fusing roller assembly includes a fusing roller that serves as a heat pipe, and a resistance heater and/or a halogen lamp inside the fusing roller, so that the surface of the fusing roller can be instantaneously heated up to a target fusing temperature. The fusing roller assembly can be heated up to a target fusing temperature within a shorter period of time without need for a warm-up period and a stand-by period, so that power consumption decreases.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: May 27, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyung-woo Lee, Tae-gyu Kim
  • Publication number: 20030095819
    Abstract: A fusing apparatus of an electrophotographic image forming apparatus includes an internal pipe having a tubular body portion and end portions integrally formed with the body portion at both ends of the body portion, a heat-generating portion installed to wrap the body portion to be in close contact with the body portion without a gap and to generate heat, and a fusing roller installed to wrap the heat-generating portion. The fusing apparatus provides a perfect contact between the heat-generating portion and the internal pipe, thereby maintaining an entire surface of the fusing roller at a uniform temperature without a temperature deviation. Therefore, an optimal efficiency in fixing a toner image on printer paper can be achieved.
    Type: Application
    Filed: October 10, 2002
    Publication date: May 22, 2003
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Kyung-woo Lee
  • Patent number: RE41202
    Abstract: A belt-type fixing device is provided that allows reduction in driving torque for a fixing belt without deteriorating performance of heat transfer from a heating roller to the fixing belt. The belt-type fixing device of the present invention has an endless-sheet-like fixing belt to be heated that is wound around a rotatable heating roller and around a nip forming member fixed so as to be incapable of rotating, and has a pressurizing roller that can be driven to rotate and that is in pressure contact with the nip forming member with the fixing belt interposed between. Contact part between the fixing belt and the pressurizing roller forms a fixing nip. For a tension load W [N] on the fixing belt that is driven and rotated by the pressurizing roller, and a width L [m] of the fixing belt, W/L is set in a range from 18.0 to 107.9 [N/m].
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: April 6, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yutaka Otsuka, Satoru Yoneda