Cylindrical Or Roller-type Support For Material To Be Heated Patents (Class 219/469)
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Patent number: 4990751Abstract: A drier drum, in particular for papermaking machines, for textile machines and the like, comprises a drum cylinder, end flanges carrying the drum cylinder, a drive system mechanically coupled to at least one of the flanges to rotate it and heating means. The drum comprises a fixed refractory material cylindrical sleeve covered with a heat reflecting coating disposed coaxially inside the drum cylinder and heating means comprising main electrical heating elements of elongate shape adapted to be energized continuously during functioning thereof and profile correcting electrical heating elements of elongate shape adapted to be energized selectively. At least some of the main heating elements are longer than any of the profile correcting heating elements. The electrical heating elements are carried by the cylindrical sleeve.Type: GrantFiled: September 25, 1989Date of Patent: February 5, 1991Assignee: S.E.M.T.I. Societe a Responsabilite LimiteeInventor: Jean P. Nous
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Patent number: 4984027Abstract: A fusing member suitable for use as a fuser roller in an electrostatographic fusing apparatus, is made entirely of elastomeric materials and has a smooth surface that can be heated. Such a fuser roller is particularly inexpensive to manufacture, not susceptible to delamination failure, and particularly suitable for use in a fusing apparatus as an externally heated and axially unsupported roller.Type: GrantFiled: December 28, 1988Date of Patent: January 8, 1991Assignee: Eastman Kodak CompanyInventors: John E. Derimiggio, Linn C. Hoover
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Patent number: 4977308Abstract: A heat roller type fixing device having a fixing roller and a pressing roller and applicable to an electrophotographic copier or like image forming apparatus, and a method of producing the same. The pressing roller is produced such that the content of 3- to 15-mer, preferably 3- to 10-mer, low-molecular weight siloxanes (oligomers) which are contained in the roller is less than 300 parts per million. While the fixing device is in operation, chargers built in the image forming apparatus are prevented from being whitened by pologomers which are evaporated from the pressing roller.Type: GrantFiled: June 20, 1988Date of Patent: December 11, 1990Assignee: Ricoh Company, Ltd.Inventor: Setsuo Soga
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Patent number: 4970559Abstract: There are provided an organic polymer composition having an antistatic property, and a molding product and a fixing device using the same. The organic polymer composition comprises at least an organic polymer and porous inorganic fine powder carrying a liquid antistatic agent dispersed in the organic polymer; the porous inorganic fine powder having an oil absorption of 100 ml/100 g or larger before it carries the liquid antistatic agent.Type: GrantFiled: November 9, 1988Date of Patent: November 13, 1990Assignee: Canon Kabushiki KaishaInventor: Toshiyuki Miyabayashi
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Patent number: 4967237Abstract: A system for fixing a toner image to a paper has a first rotatably mounted roller having a peripheral surface for contact with the side of the paper having the toner image therein, a second rotatably mounted roller having a peripheral surface for contact with the other side of the paper in pressure engagement with the peripheral surface of the first roller, and means for rotating the first and second rollers for driving the peripheral surfaces at different velocities, the velocities differing by an amount at least sufficient to provide a slippage between the first roller and the paper held between the first and second rollers to minimize paper rucking, but differing by an amount insufficient to effectively distort the toner image.Type: GrantFiled: September 15, 1988Date of Patent: October 30, 1990Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Sasaki, Shinichi Murakami
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Patent number: 4961704Abstract: In a printing sheet conveying device in which a sheet bearing a toner image is passed through a heating roll and a pressure roll, and which has means for changing the right and left contact pressures of these rolls to correct the meandering movement of the sheet when conveyance of the sheet is started; in which when conveyance of the sheet is started, the contact pressure of the rolls is made higher on one of the right and left sides than on the other side, and in a predetermined period of time the contact pressures on both sides are made equal to each other.Type: GrantFiled: July 7, 1989Date of Patent: October 9, 1990Assignee: Hitachi Koki Company, Ltd.Inventors: Shigeo Nemoto, Osamu Namikawa, Kiyomi Tsuchiya, Isao Nakajima, Yasuo Kikuchi, Tomio Sugaya, Toshitaka Ogawa, Sigenobu Katagiri
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Patent number: 4952782Abstract: A fixing roller used in an electrophotographic device includes a coupling with a drive key that engages an end of a pressing roll that contains a key groove. Disposed between the coupling and the end of the pressing roll is a spacing member. This spacing member decreases the rate at which the key groove and the drive key deteriorate when two fixing rollers are used as pair to fix toner on a printed page. The spacing member is made of plastic, a sintered metal alloy, or other material. Also, the spacing member is lubricated to further prevent friction and the key groove of the pressing roll is lined with an abrasion resistant material to further prevent deterioration of the drive key and the key groove.Type: GrantFiled: November 7, 1988Date of Patent: August 28, 1990Assignee: Hitachi Koki Co., Ltd.Inventors: Syuho Yokokawa, Shinichi Fukazawa, Yasuo Kikuchi, Takashi Suzuki, Isao Nakajima
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Patent number: 4952781Abstract: A method of controlling the surface temperature of a fixing roller of a heat roller type fixing device which is installed in an electrophotographic copier, facsimile apparatus for similar image forming apparatus. When a thermistor which is responsive to the surface temperatures of the fixing roller fails or it is positioned inaccurately relative the roller, the method prevents the surface temperature of the roller from being sensed erroneously and thereby eliminates unusual rises and falls of the surface temperature.Type: GrantFiled: May 26, 1989Date of Patent: August 28, 1990Assignee: Ricoh Company, Ltd.Inventor: Kiyoto Kozaiku
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Patent number: 4935605Abstract: An apparatus for correcting curl of a belt-like magnetic recording medium made of a ferromagnetic thin film formed on a flexible substrate, in which the magnetic recording medium fed from a master roll thereof contacts a heating roller so that curl of the magnetic recording medium is corrected. The surface of the heating roller is covered with a material having thermal conductivity lower than that of a material forming the body of the heating roller.Type: GrantFiled: December 1, 1988Date of Patent: June 19, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Yasunaga, Masaru Sekine
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Patent number: 4931618Abstract: An image glazing device for applying a gloss to an image formed on an image receiving material is accommodated in an image forming apparatus the image glazing device being provided with at least two rollers disposed in a direction of feed of the image receiving material, an image glazing belt passed between and rotatably driven by the two rollers for applying the gloss to the image, a heater accommodated in or disposed in the vicinity of an upstream one of the two rollers for heating the image glazing belt and a paper transport guide located immediately below and along the image glazing belt for transporting the image receiving material wherein the diameter of the downstream one of the two rollers is determined in accordance with the rotating speed of the image glazing belt and the temperature of the image glazing belt at a location where the downstream roller is provided so that image offsetting will not take place.Type: GrantFiled: December 13, 1988Date of Patent: June 5, 1990Assignee: Sharp Kabushiki KaishaInventors: Syoichi Nagata, Kunio Ohashi
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Patent number: 4928148Abstract: A fixing device for a dry process copier selectively operable in a full-color copy mode and a black-and-white copy mode has a Teflon-coated first fixing roller which is a rigid roller, and a second fixing roller having an elastic layer thereon. In the full-color copy mode the second fixing roller fixes a toner image while, in the black-and-white copy mode, the first fixing roller fixes a toner image. When various units of the copier other than the fixing device are not activated, heat sources individually accommodated in the first and second fixing rollers are activated to warm up the fixing rollers rapidly to a predetermined temperature. While the full-color copy mode or the black-and-white copy mode is under way, either one of the heat sources which is to join in fixation is activated.Type: GrantFiled: October 4, 1989Date of Patent: May 22, 1990Assignee: Ricoh Company, Ltd.Inventor: Yuichirou Higashi
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Patent number: 4910559Abstract: An elastic rotatable member for conveying a member to be conveyed includes an elastic layer, a resin layer formed on the elastic layer, wherein the resin layer has a portion wherein it has a thickness larger than the other portion to project outwardly. Also, an image fixing apparatus includes an elastic rotatable member including an elastic layer and a resin layer formed on the elastic layer, the resin layer having a portion projected outwardly, and a rotatable member cooperative with the elastic rotatable member to grip and convey a material carrying toner image to be fixed.Type: GrantFiled: August 9, 1989Date of Patent: March 20, 1990Assignee: Canon Kabushiki KaishaInventors: Tsukasa Kuge, Masahiro Goto, Isamu Sakane
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Patent number: 4905050Abstract: An apparatus for fusing toner images to a receiver or copy sheet of paper includes a pressure roller and an axially unsupported fuser roller that is nested rotatably between the pressure roller and a pair of heater rollers. The apparatus of the present invention is particularly suitable for fusing toner images to the receiver or copy sheet without generating fuser related defects such as copy distortions, copy curls, wrinkles or image voids.Type: GrantFiled: December 28, 1988Date of Patent: February 27, 1990Assignee: Eastman Kodak CompanyInventors: John E. Derimiggio, Linn C. Hoover
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Patent number: 4887964Abstract: An image fixing apparatus includes a couple of rotatable rollers press-contacted to each other, for fixing a toner image by passing a toner image carrying material carrying the toner image, through a nip formed between the rotatable rollers, at least one of the rollers including a surface coating of anodized aluminum having fine pores filled with perfluoroalkyl compound material.Type: GrantFiled: July 7, 1988Date of Patent: December 19, 1989Assignee: Canon Kabushiki KaishaInventor: Tatsuo Takeuchi
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Patent number: 4888464Abstract: A heat roll for electrophotography of a surface heating type having a heating resistor is arranged such that a bonding layer, an insulating layer, a resistance layer, and a surface insulating layer are consecutively provided on an outer surface of a hollow cylindrical core, and a bearing member for fitting with a bearing is fitted at each opposite end of the heat roll. A pipe or a round bar formed of aluminum, an aluminum alloy, copper, a copper alloy, or the like which has a greater coefficient of thermal conductivity than that of mild steel is disposed inside the core to permit a uniform distribution of the temperature. In addition, a gap of 0.2 mm or more is provided between the inner surface of the core and an outer peripheral surface of the member formed of the high-temperature conductive material.Type: GrantFiled: April 5, 1988Date of Patent: December 19, 1989Assignee: Hitachi Metals, Ltd.Inventors: Ryoichi Shibata, Kiyoshi Kinugawa, Tsutomu Iimura, Yasuo Sawano
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Patent number: 4883941Abstract: An instant-on fuser having a cylindrical, relatively thin fiber wound cylinder supporting a resistance wire, heating foil, or printed circuit secured on the outside surface of the cylinder or embedded to the surface of the cylinder. The interior of the cylindrical tube is filled with air, and the wire, heating foil or printed circuit is connected to electrical leads extending through caps on the ends of the cylindrical support. The fuser is fabricated from the cylinder outward to the final step of applying a release agent on the outer surface.Type: GrantFiled: August 6, 1986Date of Patent: November 28, 1989Assignee: Xerox CorporationInventors: Robert G. Martin, Paul C. Swanton
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Patent number: 4880961Abstract: A yarn heating element wherein fixed elongated core having a heater therein serves as a support for a sleeve rotatably mounted to and telescoped over the core. The space between the core and sleeve can be varied along their lengths for controlling heat radiated from the core to the shell to control the temperature profile along the length of the shell. Varying the winding density of the heater can serve the same purpose.Type: GrantFiled: March 2, 1988Date of Patent: November 14, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: James E. Duncan
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Patent number: 4874927Abstract: The resistive layer of an electrically heated toner fixing roll includes a Fe-Cr-Al metal alloy phase and a ceramic substrate phase thermally sprayed onto the surface of a thermally and electrically insulated metal roll. The ceramic substrate can be Al.sub.2 O.sub.3 and the alloy can be 64-89 wt % Fe; 10-30 wt % Cr; and 2-10 wt % Al. Al.sub.2 O.sub.3 can be the insulating layer, and the metal roll can be iron, or an iron-based alloy.Type: GrantFiled: June 7, 1988Date of Patent: October 17, 1989Assignee: Hitachi Metals, Ltd.Inventors: Ryoichi Shibata, Toshiyuki Kasakoshi
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Patent number: 4825041Abstract: A thermally developing apparatus for a light and pressure sensitive material. The exposed material is inserted between a rotating heated roller and an endless belt wrapped partially around the roller. Additionally, a temperature sensor detects abnormally high temperatures and, as a result, removes the material from the heated roller.Type: GrantFiled: December 18, 1986Date of Patent: April 25, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Akihiko Nagumo, Minoru Ishikawa
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Patent number: 4820904Abstract: A fusing roller of the type having a thin internal resistance heating layer is electrically contacted by an internal conductive annular element positioned adjacent the end of the roller core. The resistance layer is applied to a common surface formed by the outside of the core and the annular element. Preferably, the resistance layer is covered by a protective layer. With this structure, the contacting device is protected from external damage, for example, from that caused by release oil contamination.Type: GrantFiled: November 2, 1987Date of Patent: April 11, 1989Assignee: Eastman Kodak CompanyInventor: Carl T. Urban
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Patent number: 4814819Abstract: A heat-fixing apparatus comprising a heating roll to be brought into contact with a toner image borne on a sheet member, a pressure roll in pressed contact with the heating roll to provide a nip portion therebetween, each of the heating roll and the pressure roll being constituted by a cylindrical core coated with a heat-resistant, resilient layer and a resin surface layer having release properties, the heating roll and the pressure roll having such surface hardness as to make the nip portion substantially flat and also having substantially the same outer diameter, and the contact pressure of the rolls being such that the nip portion has a width within the range of providing good fixing capability. This heat-fixing apparatus can perform toner image fixing even on sheet members of a plurality of plies such as envelopes without creasing.Type: GrantFiled: October 8, 1987Date of Patent: March 21, 1989Assignee: Hitachi Metals, Ltd.Inventors: Mitsuhiro Torino, Keitaro Yamashita
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Patent number: 4813372Abstract: A thermal roller for fixing a powdered toner image onto an image receiving sheet is provided with a sub-surface resistive heat generating layer adjacent the outer surface of the roller. The thickness of the heat generating layer or the materials that constitute the layer are controlled so that the resistance per unit length of the thermal roller increases gradually in the axial direction from the center portion thereof toward and to both ends. Electrical energy passed through the heat generating layer generates a desired temperature distribution profile along the roller to provide appropriate fixing temperatures, without excessively increasing the temperature at both ends of the roller.Type: GrantFiled: May 7, 1987Date of Patent: March 21, 1989Assignee: Kabushiki Kaisha ToshibaInventors: Mitutosi Kogure, Yuka Nakamura, Makoto Tamura
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Patent number: 4810858Abstract: A fusing roller of the type having a thin resistance heating layer near its surface has a core made of a thermally and electrically insulative material, such as glass, which has a coefficient of thermal expansion comparable to that of the resistance heating layer. The roller can then withstand a high temperature curing process for other layers without separation of the resistance layer from the core.Type: GrantFiled: November 2, 1987Date of Patent: March 7, 1989Assignee: Eastman Kodak CompanyInventors: Carl T. Urban, Mark A. Lewis, David A. Glocker
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Patent number: 4796049Abstract: A surface of a heated fixing roller is coated with a tetrafluoroethylene resin in which pin holes are present in the range of about 5-30 unit/cm.sup.2 and the diameter of the pin holes is in the range of about 5-20 .mu.m.Type: GrantFiled: March 21, 1988Date of Patent: January 3, 1989Assignee: Sharp Kabushiki KaishaInventors: Hideaki Taniguchi, Koichi Moriyama, Osamu Kawasaki, Ken-ichi Iwamoto
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Patent number: 4791275Abstract: A heated roll suitable for use as a fuser roll in a xerographic processes is formed from a sheet of flexible, resilient, polyimide foam. An electrical heating circuit is adhesively secured thereto. The circuit is preferably disposed between a pair of polyimide film sheets which, in turn, are secured to the foam.Type: GrantFiled: April 7, 1986Date of Patent: December 13, 1988Assignee: IMI-TECH CorporationInventors: Raymond Lee, Gregory A. Ferro, John Evan
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Patent number: 4780078Abstract: Disclosed is a toner thermal fixing roller comprised of the following; a heating unit internally provided with a heating source: a roller pressed against said heating roller; and several member parts preventing reflective heat from heating the heating source, while these member parts are provided inside the bearing parts which are set to both ends of the heating source, the bearing parts being set to both ends of the heating roller and installed inside the hollow portion of the heating roller.Type: GrantFiled: April 10, 1987Date of Patent: October 25, 1988Assignee: Sharp Kabushiki KaishaInventor: Shintarou Masui
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Patent number: 4761311Abstract: A process for glossing a developer sheet and an apparatus useful therein are provided. The developer sheet has a thermoplastic developer resin on the surface thereof wherein the thermoplastic developer resin is capable of forming a film which imparts gloss upon the applications of heat thereto. In the process, an arched plate is heated to a temperature sufficient to cause the thermoplastic developer resin to coalesce. The arched plate has a heat transfer limiting blanket thereon to maintain the flatness of the developer sheet. The developer sheet is fed between the convex side of the heated arched plate and a belt held snugly against the plate. The belt is driven so as to move the developer sheet over the heated arched plate.Type: GrantFiled: February 19, 1987Date of Patent: August 2, 1988Assignee: The Mead CorporationInventors: Benjamin C. Stone, D. Scott Proehl
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Patent number: 4756687Abstract: An electrophotographic hot roll fuser is manually movable from an operative position within an electrophotographic reproduction device, to an inoperative position where the fuser is available for cleaning, inspection or sheet jam clearance. When the fuser is in its inoperative position, a manually operable handle is accessible for operation. Operation of this handle moves various operating components, such as sheet guides, apart, thereby facilitating manual sheet jam clearance. Subsequently, when the handle is manually returned to its original position, all sheet guides and like components are accurately relocated to their original operative positions.Type: GrantFiled: February 13, 1987Date of Patent: July 12, 1988Assignee: International Business Machines CorporationInventors: Charles Cabrera, Reid W. Gunnell, Glenn E. Siemer, Eugene G. Stahlberg
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Patent number: 4755849Abstract: An image reproducing apparatus wherein a heat generating member is disposed in the proximity of a roller fixing device at the side of a charge receptor from which a transfer sheet is introduced to the fixing device. The roller fixing device is a heat roller fixer and the heat generating member is a plate-shaped heat generating member disposed at the lower side of conveying path for the transfer sheet.Type: GrantFiled: October 21, 1986Date of Patent: July 5, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Noriyoshi Tarumi, Kiyoshi Kimura, Kouichi Gunzi
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Patent number: 4745430Abstract: A temperature control device uses a thermo-sensitive element to detect the temperature of an imaging system heated fixer device member. A comparator compares the potential generated by the thermo-sensitive element corresponding to the detected temperature with a reference voltage to set the temperature of the heated member to a predetermined level. A signal representing the comparison result is used for controlling the temperature of the heated member. Any abnormality of the heated member is detected on the basis of the output signal from an oscillator producing a signal which changes the reference potential at predetermined periods and from the comparator output signal.Type: GrantFiled: October 24, 1986Date of Patent: May 17, 1988Assignees: Casio Computer Co. Ltd., Casio Electronics Manufacturing Co., Ltd.Inventor: Shizuo Tsuchiya
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Patent number: 4745431Abstract: A device for fixing a toner image on an image forming medium in an image forming apparatus includes a heating roller and a supporting roller for supporting the sheet of paper and transporting the paper, the heating roller having an inner peripheral surface, and at least one electrically resistive layer on the inner surface of the heating roller for fixing the toner image on the paper and reducing heat loss from the heating roller. Further, the device includes a pair of electrodes at opposite ends of the resistive layer for transmitting electrical power to the resistive layer.Type: GrantFiled: March 16, 1987Date of Patent: May 17, 1988Assignee: Kabushiki Kaisha ToshibaInventors: Mitutosi Kogure, Yuka Nakamura, Makoto Tamura
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Patent number: 4737231Abstract: Disclosed herein is a device for sealing portions of an overlapped pair of single or composite films by contacting or facing an appropriately heated sealing surface of a heat sealing member. The heat sealing member is provided with the sealing surface in a part of its outer surface and with a sealed chamber therewithin in the vicinity of the sealing surface. The sealed chamber contains under decompression working liquid for evaporating and generating high-temperature condensable gas by being heated. The heat sealing member further has a heat source in the interior or the exterior thereof adjacent to at least a part of the sealed chamber for heating the working liquid.Type: GrantFiled: January 7, 1986Date of Patent: April 12, 1988Assignees: Fuji Machinery Co., Ltd., Japan Packaging Machinery Manufacturer's AssociationInventors: Kiyoshi Seko, Mamoru Ichikawa
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Patent number: 4736226Abstract: A fixing device including a fixing roller and a pressure member rotatable in pressure-contact with said fixing roller, out of which at least one is provided with a heater and is capable of fixing an image-recorded material bearing thereon, toner is passed through between said fixing roller and said pressure member; said fixing device characterized in that at least one of said heaters is made in the bar-like form and served as a supporting shaft for rotating said fixing roller or said pressure member and can further be taken out and put in.Type: GrantFiled: December 3, 1985Date of Patent: April 5, 1988Assignee: Konishiroku Photo Industry Co., Ltd.Inventor: Michio Mogi
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Patent number: 4724305Abstract: The roller has a roller body having a small heat capacity, a bonding layer formed substantially uniformaly on the outer peripheral surface of the roller body, a lower insulating layer provided on the bonding layer; a heat generating layer provided on the lower insulating layer and having a ceramic matrix and a metallic resistance layer constituted by a metal dispersed in the ceramic matrix, the metallic resistance layer extending substantially continuously in the lengthwise direction of the roller, the heat generating layer having a thermal expansion coefficient substantially the same that of the lower insulating layer, an upper insulating layer provided on the heat generating layer, a protective layer formed on the upper insulating layer so as to prevent offset of the toner images, and an electrode layer formed on each end of the roller and adapted to connect the heat generating layer to an external power source.Type: GrantFiled: March 7, 1986Date of Patent: February 9, 1988Assignee: Hitachi Metals, Ltd.Inventors: Tsutomu Iimura, Ryoichi Shibata, Yukiharu Takada
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Patent number: 4717338Abstract: A heater drum has an outer cylindrical wall centered on and rotatable about an axis, an inner cylindrical wall fixed concentrically within the outer wall and defining therewith an annular chamber, and a body of a heat-transmitting fluid in the chamber in heat-transmitting contact with both walls. A core body fixed nonrotatably about the axis inside the inner wall is heated to a high treatment temperature. This heat is transmitted radially from the core body to the inner wall. The walls are rotated jointly about the axis relative to the core body to distribute the heat of the inner wall via the fluid body to the outer wall. The chamber is at subatmospheric pressure and the fluid is partly vaporized and partly liquid at the high treatment temperature. The core body is of part-cylindrical section generally centered on the axis and has an outer surface spaced slightly radially inward of the inner wall.Type: GrantFiled: April 14, 1986Date of Patent: January 5, 1988Assignee: Cellier S.A.Inventor: Jacques Cellier
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Patent number: 4693587Abstract: An image forming apparatus wherein an unfixed image is formed on a recording material at an unfixed image forming station, such as an image transfer station or a station for developing an electrostatic latent image. The unfixed image is fixed by a fixing device including a couple of fixing rollers, one of which is substantially frustoconical. The present invention is effective to avoid the possible disturbance to the image caused by the frustoconical shape of the roller. The preferable arrangement is such that the distance between the image forming station and the nip formed between the rollers is shorter than the length of the recording material, and that the nip is non-parallel with respect to the leading edge of the on-coming recording material. Further, the small diameter side of the conical roller receives the leading edge of the sheet earlier than the large diameter side of the frustoconical roller.Type: GrantFiled: July 11, 1985Date of Patent: September 15, 1987Assignee: Canon Kabushiki KaishaInventors: Michio Shigenobu, Takashi Saito
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Patent number: 4684784Abstract: Apparatus is disclosed for feeding a support web between a pair of fusing rollers, at least one of which is heated. Heat conductive skive means is supported in contact with the heated roller for stripping the web material from the roller. Temperature sensitive means in heat-conducting contact with the skive means senses the temperature change of the roller by conduction along the skive means. The temperature sensitive means generates an electrical signal representative of the temperature change, and the signal is coupled to temperature control means operative in response to the generated signal to control the temperature of the heated roller so that the temperature transferred to the web material is maintained within preferred temperature limits.Type: GrantFiled: April 24, 1986Date of Patent: August 4, 1987Assignee: Eastman Kodak CompanyInventor: Ernest J. Tamary
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Patent number: 4659206Abstract: A photoconductive drum device for electrostatic copying machines or the like includes a temperature maintaining heater bent to a cylindrical form and accommodated in the main body of a photoconductive drum. The heater is constructed with a base plate and a heat generator attached to the base plate. The base plate has a parallelogrammatic form substantially corresponding to a shape which is obtained by cutting a hollow cylinder, having a diameter approximate to the inside diameter of the drum main body, along a helical cut line and unbending the cylinder.Type: GrantFiled: May 23, 1985Date of Patent: April 21, 1987Assignee: Mita Industrial Co., Ltd.Inventors: Masami Kai, Shigeo Kurando, Toshinobu Katafuchi, Katsumi Amakawa, Tetsuji Kajitani
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Patent number: 4653897Abstract: Heat and pressure fusing apparatus having a thin-walled tubular fuser roll cooperating with a rigid pressure roll to pass copy substrates therebetween with the toner images on the substrates contacting the fuser roll. The rolls are supported in pressure engagement such that the axes are skewed relative to each other to compensate for roll deflection aggravated by hoop deflection of the thin-walled fuser roll. Thermal degradation of the elastomeric conformable coating is reduced by standing by at a low temperature and quickly warming up to run temperature.Type: GrantFiled: December 24, 1984Date of Patent: March 31, 1987Assignee: Xerox CorporationInventor: Paul M. Fromm
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Patent number: 4629867Abstract: There is disclosed a heated roll for the thermal treatment of formed products. It includes a driven hollow shaft and a hollow roll body of a circular-ring-shaped cross section and closed on all sides to accommodate a heat transfer medium. Power supply lines for heating elements as well as electric wires of temperature probes are led through the hollow shaft. In order to provide a heated roll to be used without problems both in the low-temperature range and in the high-temperature range up to about 600.degree. C. and to reach a uniform temperature profile over the total operation surface of the roll outer shell and a long service life of the heat transfer medium, without excessive temperature prevailing at the bearings of the driving shaft, and to provide for an easy repair, the hollow shaft is connected with the roll body by a hub. One or several saline compound(s) or (a) low-melting metal(s) or metal alloy(s) are contained in the interior of the hollow roll body.Type: GrantFiled: March 25, 1985Date of Patent: December 16, 1986Assignee: Lenzing AktiengesellschaftInventors: Josef Baumgartinger, Ernst Rauch, Haio Harms, Adalbert Wimmer
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Patent number: 4628183Abstract: A heating-fixing roller has over the axial direction thereof a heat-generating layer formed via the step of mixing a raw material capable of obtaining a positive temperature coefficient of resistivity characteristic by baking and a binder for holding the raw material and forming an unbaked annular substrate and the step of providing an electrode to which an applied voltage is supplied on the mixture during the forming step, and thereafter via the step of baking the unbaked annular substrate on which the electrode is formed. The heat-generating layer has a positive temperature coefficient of resistivity characteristic after the baking and has the electrode formed on the surface thereof.Type: GrantFiled: December 14, 1984Date of Patent: December 9, 1986Assignee: Canon Kabushiki KaishaInventor: Hiroshi Satomura
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Patent number: 4616917Abstract: A fixing device includes a first rotatable member and a second rotatable member for gripping and transporting a recording material to fix a material to be fixed having a predetermined electric polarity onto the recording material, the first rotatable member being positioned to be contacted with the face of recording material bearing the material to be fixed, and the second rotatable member to be contacted with a back face of the recording material, and at least one of the first and second rotatable members having a surface containing an electrification agent for generating electric charge through friction with the recording material for formation of an electrical field for attaching the material to be fixed onto the recording material.Type: GrantFiled: October 14, 1983Date of Patent: October 14, 1986Assignee: Canon Kabushiki KaishaInventor: Masaaki Sakurai
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Patent number: 4616474Abstract: Mobile film wrapping apparatus for unitizing a load is attached to a self propelled vehicle and powered by the vehicle's D.C. power supply. The film wrapping apparatus includes a supporting structure for holding a supply roll of film in a generally vertical orientation. The speed at which the film is dispensed from the supply roll is controlled by an electrically powered adjustable tension brake. The film is wound around a self contained heated roller which facilitates prestretching of the film prior to wrapping. The heated roller contains a supply of heating fluid, a D.C. heating element, a thermostatic switch and an auxiliary rapid heat-up A.C. heating element. Power is provided to the heated roller via a slip ring assembly.Type: GrantFiled: April 25, 1985Date of Patent: October 14, 1986Assignee: Wrap & Roll, Inc.Inventors: Edmond Morley, Neil DiLorenzo, James Karras
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Patent number: 4599128Abstract: The invention relates to a process and apparatus for the continuous production of metal-clad laminates, in particular, for the manufacture of electric printed circuit boards, consisting of an electrically insulating core layer and a metal foil covering one or both surfaces of this layer, wherein the metal foil unwound from a supply roll and pre-heated is bonded in a dual-belt press under the influence of pressure and heat to the core layer. In order to obtain an immaculate laminate surface, provision is made for the metal foil to be pre-heated while it is still wound on the supply roll. The source of the pre-heating of the metal foil is a heatable core of the supply roll, the pre-heated metal foil on entering the dual-belt press is pressed against the press belt of the press, and the metal foil supply roll and the region of the foil which is pressed against the press belt are arranged in a common clean air area.Type: GrantFiled: November 20, 1984Date of Patent: July 8, 1986Inventor: Kurt Held
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Patent number: 4596920Abstract: A heat roller fixing device for use in an electrophotographic copying apparatus and the like, which includes a heating roller constituted by a fluorine resin layer laminated on an electrically conductive core member through a primer layer the heated roller being driven for rotation, and a pressure roller constituted by an electrically insulative layer on another electrically conductive core member and held in contact with the heating roller for simultaneous rotation with the heating roller so as to fix a charged toner image formed on copy paper onto the copy paper by causing the copy paper carrying the toner image thereon to pass between the heating roller and pressure roller. The primer layer is composed of a primer having incorporated therein an electrically conductive material, and the primer of the primer layer is partly exposed at the surface of the fluorine resin layer.Type: GrantFiled: April 24, 1985Date of Patent: June 24, 1986Assignee: Minolta Camera Kabushiki KaishaInventor: Sanji Inagaki
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Patent number: 4594068Abstract: Disclosed is a roll-fusing apparatus comprising a heated fusing roller and a pressure roller which form a roller gap therebetween. The shape of the non-cylindrical roller core and the coating of the pressure roller makes it possible to fuse the toner images on copy supports which remain free of wrinkles after passing through the roller gap. In addition, duplication of the copy image does not occur up to DIN A1 size copies. The roller core and the coating of the pressure roller, comprising a silicone elastomer coating and a shrunk-on tubing have varying thicknesses over the length of the roller. As a result, the speed of passage of the copy support at the edges of the roller gap is modified, compared with the speed of passage obtained with a pressure roller having a cylindrical roller core and a cylindrical coating.Type: GrantFiled: June 20, 1984Date of Patent: June 10, 1986Assignee: Hoechst AktiengesellschaftInventors: Bernd Bardutzky, Reinhard Dinges, Peter Gumm
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Patent number: 4580144Abstract: The invention features a high speed thermal printing mechanism having a dichotomized printing sequence. The thermal printing mechanism is particularly useful for printing postal values and indicia upon postage tape in a variable and fixed format, respectively. The variable information can be imprinted by a thermal head under the influence of a microprocessor. The fixed information can be imprinted by an etched thermal print screen.Type: GrantFiled: August 20, 1984Date of Patent: April 1, 1986Assignee: Pitney Bowes Inc.Inventor: Salvatore J. Calvi
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Patent number: 4580033Abstract: A fixing device has first and second rotatable members for holding therebetween and conveying a recording material to fix an unfixed image on the recording material, and drive means for rotating the first and second rotatable members. The direction of projection of the convex portions of the surfaces of the first and second rotatable members is opposite to the direction of rotation of a roller.Type: GrantFiled: August 24, 1984Date of Patent: April 1, 1986Assignee: Canon Kabushiki KaishaInventor: Masaaki Sakurai
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Patent number: 4570044Abstract: An induction heating and fixing device suitable for a copying machine comprises a fixing roller, a first iron core, a second iron core, and two third iron cores. The first iron core inserted into the center of the fixing roller. The first, the second, and the third iron cores are magnetically and mechanically combined together to form a closed magnetic circuit. Magnetic blocks are provided for combining the first, the second, and the third iron cores. Each of these iron cores comprises a plurality of isolated thin silicon steel plates. At least one of the two of the third iron cores is disassembled to remove the fixing roller from the device for maintenance.Type: GrantFiled: April 19, 1983Date of Patent: February 11, 1986Assignee: Sharp Kabushiki KaishaInventors: Toshiaki Kobayashi, Noriaki Sakamoto
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Patent number: 4549803Abstract: The present invention provides an apparatus wherein image fixing means is controlled for different fixing conditions under which a toner image is fixed on a recording material to adapt it to a synthetic resin sheet as the recording material or to a color image to be fixed, including at least one of fixing temperature, fixing speed and actuation of cleaning means. The present invention is particularly effective in use for a recording system in which the fixing temperature and speed are decreased and the cleaning means is actuated when a color image is to be formed on a transparent or resin sheet. The present invention is most useful for a color image recording system.Type: GrantFiled: April 6, 1984Date of Patent: October 29, 1985Assignee: Canon Kabushiki KaishaInventors: Akio Ohno, Kenji Takeda