Roller Or Belt Patents (Class 399/313)
  • Patent number: 10627768
    Abstract: An image forming apparatus includes a photosensitive member; an exposure portion configured to expose the photosensitive member to light depending on image information to form a latent image on the photosensitive member; a developing portion configured to develop the latent image into a toner image with toner; and a transfer portion configured to transfer the toner image from the photosensitive member onto a recording material. The image forming apparatus changes a surface movement speed of the photosensitive member at timing prior to predetermined timing, when a moving speed of a recording material at the transfer portion changes, by a predetermined time.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: April 21, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ai Suzuki, Masashi Tanaka, Shoichiro Ikegami, Kensuke Umeda, Sho Taguchi
  • Patent number: 10555376
    Abstract: A heating paste composition, and a sheet heating element, a heating roller, a heating unit and a heating module, which use the composition, are disclosed. In one aspect, the heating paste composition includes 0.2 parts to 6 parts by weight of carbon nanotube particles, 0.5 parts to 30 parts by weight of graphite particles, 5 parts to 30 parts by weight of a binder mixture, 29 parts to 80 parts by weight of an organic solvent and 0.5 parts to 5 parts by weight of a dispersant, wherein the weights are with respect to 100 parts by weight of the heating paste composition.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: February 4, 2020
    Assignee: Korea Electronics Technology Institute
    Inventors: Yoonjin Kim, Jinwoo Cho
  • Patent number: 10551770
    Abstract: A transfer device includes an intermediate transfer belt having a surface that receives a toner image, a support roller supporting the intermediate transfer belt, and a transfer unit that transfers the toner image from the intermediate transfer belt to a recording medium. The transfer unit includes a transfer belt and a transfer roller disposed opposite the support roller with the transfer belt and the intermediate transfer belt therebetween. The transfer roller has a volume resistance value of one-tenth or less of a system resistance value for a current of 120 ?A between the support roller and the transfer roller.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: February 4, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masayuki Seko, Masato Ono
  • Patent number: 10444654
    Abstract: A conductive member includes a conductive substrate; and a conductive elastic layer disposed on the conductive substrate and exhibiting ionic conduction. The conductive elastic layer contains an elastic material, which contains epichlorohydrin rubber, and an anti-aging agent, and the amount of free chlorine ions in the conductive elastic layer is 1 ?g/g or more and 80 ?g/g or less.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 15, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shogo Tomari, Yuki Tagawa, Masato Ono, Minoru Rokutan, Yuma Tanaka, Masayuki Seko
  • Patent number: 10372069
    Abstract: An image forming apparatus includes a control portion that controls a drive speed of a first drive source, so that a speed of a sheet conveyed in a conveyance nip portion is greater than a speed of the sheet conveyed in a transfer nip portion, and a drive speed of a second drive source, so that the speed of the sheet conveyed in the transfer nip portion is greater than a speed of the sheet conveyed in a fixing nip portion. The control portion changes a rotation speed of a pair of conveyance members from a first speed to a second speed greater than the first speed after a first loop amount of the sheet formed between the transfer nip portion and the fixing nip portion becomes greater than a second loop amount of the sheet formed between the transfer nip portion and the conveyance nip portion.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: August 6, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kentaro Yamana, Yuichi Tanabe
  • Patent number: 10324405
    Abstract: A transfer device includes a holding body that holds a toner image; a transfer body that presses a recording medium against the holding body with a first pressing force or a second pressing force, which is smaller than the first pressing force, to transfer the toner image to the recording medium while transporting the recording medium between the transfer body and the holding body; and a setting portion that sets a pressing force exerted on the recording medium at the second pressing force when a mass of a toner of an uppermost toner layer constituting the toner image and disposed on the holding body is equal to or exceeds a threshold.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: June 18, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaaki Yamaura, Satoshi Shigezaki, Yoshiki Shimodaira, Toshiaki Baba
  • Patent number: 10234810
    Abstract: A conveyance device includes a guide, a positioner, and a pusher. The guide extends in a longitudinal direction of an image bearer and is disposed upstream from a transfer position, at which an image is transferred from the image bearer to the recording medium, in a direction of conveyance of a recording medium to guide the recording medium. The positioner positions an end of the guide relative to the image bearer. The pusher contacts the guide at a position closer to a center of the guide than the end of the guide in the longitudinal direction, to push the guide toward the image bearer.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: March 19, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoya Ohmura, Yuuki Nobuoka
  • Patent number: 10228639
    Abstract: An image forming apparatus includes a belt-shaped image bearer, a transferer, a guide, two rotators, and a support. The image bearer has an image bearing surface to bear an image thereon. The transferer forms a transfer section between the transferer and the image bearer, to transfer the image onto a recording medium. The guide is disposed upstream from the transfer section in a delivery direction of the recording medium, to guide the recording medium toward the transfer section. The two rotators are disposed upstream from the transfer section in a moving direction of the image bearer and in contact with a non-image bearing surface of the image bearer opposite to the image bearing surface, a first rotator being closer to the transfer section than a second rotator. The support supports the first rotator and the guide and adjusts a position of the first rotator and a position of the guide.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: March 12, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Seiichi Kogure, Naohiro Kumagai, Junpei Fujita, Kazuki Yogosawa, Tatsuya Ohsugi, Kenji Sugiura, Yuuji Wada, Takehide Mizutani
  • Patent number: 10209647
    Abstract: Certain embodiments provide a transfer apparatus, which including: an conductive intermediate transfer member; a transfer section configured to secondarily transfer a toner image onto an image receiving medium in a constant current system; a conveyance section configured to convey the image receiving medium; and a high voltage transformer configured to apply a bias to the transfer member, wherein the sum of the products of the volume resistivities [?·cm] and the thicknesses [cm] of the intermediate transfer member and the transfer member is equal to or greater than 3.6×108 ?·cm2, and the conveyance speed V[mm/s] of the image receiving medium={the output upper limit value A[V] of the absolute value of the voltage output from the transfer polarity side of the high voltage transformer}×0.009.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: February 19, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Sunao Takenaka, Suguru Kurita, Koichiro Sato, Koji Takahashi, Kazufumi Ishida, Yoshiki Kogiso, Takehiro Meguro
  • Patent number: 10050574
    Abstract: A method and apparatus for controlling regeneration for a motor. An instantaneous voltage provided by a power supply to the motor is identified using a voltage signal received from a voltage sensor. A new average voltage is computed for the motor using the instantaneous voltage, a previously computed average voltage, and a weight factor for the instantaneous voltage. A difference between the new average voltage and the instantaneous voltage is compared to a selected threshold to determine whether a regeneration condition exists. Operation of the motor is controlled such that a duty cycle of the motor does not decrease in response to a determination that the regeneration condition exists.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: August 14, 2018
    Assignee: The Boeing Company
    Inventors: Kevin T. Colangelo, Douglas Conrad Cameron
  • Patent number: 9885982
    Abstract: A transfer device includes a second transfer roller that has an elastic layer and a surface layer disposed in tight contact with an outer side of the elastic layer and rotates to transfer a toner image on a surface of an intermediate transfer body onto a recording medium, a scraping member that is in contact with the second transfer roller to scrape an attached substance off the surface layer, and a pressed member that is pressed against the surface layer on a downstream side of a contact portion with the intermediate transfer body and on an upstream side of the scraping member in a rotating direction of the second transfer roller and rotates in a forward direction with respect to rotation of the second transfer roller.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: February 6, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Tetsunao Kojiri, Yoshinori Takahashi
  • Patent number: 9856559
    Abstract: According to an aspect of the present disclosure, a color sensor is provided for sensing whether a ground roller in a corona treatment system needs to be serviced. The color sensor is capable of detecting imperfections which have changed the reflectance level of the ground roller from a predefined level. According to another aspect of the present disclosure, if a determination is made that the ground roller needs to be serviced, then an alarm is activated and/or the operation of the corona treatment system is ceased.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: January 2, 2018
    Assignee: ILLINOIS TOOL WORKS INC.
    Inventor: Rory A. Wolf
  • Patent number: 9778604
    Abstract: An image forming apparatus includes: an image carrier carrying a toner image; a transfer unit disposed to contact the image carrier and transferring the toner image carried on the image carrier to a recording medium; and a gap forming unit that forms a gap between the image carrier and the transfer unit when one or more regions of the recording medium are positioned between the image carrier and the transfer unit. The one or more regions include at least one of a leading end and a trailing end of the recording medium. The image forming apparatus further includes an electric charge applying unit disposed on an upstream side of the transfer unit and applies electric charges to the one or more regions of the recording medium. The electric charges have an opposite polarity to a charging polarity of a toner which forms the toner image.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: October 3, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoko Miyamoto, Tomoaki Yoshioka, Yasuhiro Shimada
  • Patent number: 9766575
    Abstract: An image forming apparatus, including an image bearer configured to bear a toner image; a transfer device disposed opposing to the image bearer; and a transfer bias power source. The transfer bias power source is configured to output a transfer bias to transfer the toner image onto a recording medium. The transfer bias is a superimposed bias that cyclically alternates between a transfer-directional bias to transfer the toner image from the image bearer onto the recording medium and an opposite-directional bias in an opposite direction of the transfer direction. A ratio of a time period of application of the opposite-directional bias to a total time period of one cycle of the output transfer bias is greater than 50%. The transfer bias power source changes a value of a direct current voltage in the superimposed bias according to a linear velocity of the image bearer.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: September 19, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohsugi, Kenji Sugiura, Hirokazu Ishii, Hiroyoshi Haga, Yuuji Wada, Takehide Mizutani, Naoto Kochi, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa
  • Patent number: 9753414
    Abstract: Provided is an image forming apparatus including plural image formation units that form an image, an annular belt that holds the image on an outer circumferential surface thereof and transports the image, a driving roller that rotates with being in contact with an inner circumferential surface of the belt and rotates the belt, an adjustment roller that rotates with being in contact with the inner circumferential surface of the belt and adjusts a frictional force generated between the belt and the adjustment roller, a transfer roller that is driven to rotate with being in contact with the outer circumferential surface of the belt and transfers the image on the outer circumferential surface of the belt to a recording medium, and an adjustment unit that adjusts at least one of a rotational speed of the adjustment roller and a normal force of the adjustment roller against the belt.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: September 5, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Takehiro Oishi
  • Patent number: 9737735
    Abstract: Ultrasound surgical apparatus are disclosed, including: medical ultrasound handpieces with proximally mounted ultrasound radiators configured to create a distally-focused beam of ultrasound energy, in combination with distal guide members for control of focal point depth; medical ultrasound handpieces with proximally mounted ultrasound radiators configured to create a distally-focused beam of ultrasound energy, in combination with distal rolling members for manipulability and control of focal point depth; medical ultrasound handpiece assemblies with coupled end effectors providing a probe with a probe dilation region configured to have an average outside diameter that is equal to or greater than the average outside diameter of a probe tip and neck; as well as junctions to an ultrasonically inactive probe sheath; medical ultrasound handpiece assemblies with coupled end effectors having positionable, ultrasonically inactive probe sheath ends slidably operable to both cover and expose at least a probe tip; and u
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: August 22, 2017
    Assignee: ETHICON LLC
    Inventors: Timothy G. Dietz, Foster B. Stulen, William A. Olson, William Dannaher, John Willis, Sora Rhee, Juergen Burger, Philippe Margairaz, Robert Lockhart, Franz Friedrich, Danik Brand, Herbert Keppner, Jean-Paul Sandoz
  • Patent number: 9671725
    Abstract: A transfer device includes a transfer unit including an image carrier that carries a toner image to be transferred to a transfer surface of a recording medium, a transfer member disposed on a non-transfer-surface side of the recording medium, and an opposing member disposed opposite the transfer member with the image carrier therebetween; a scraping member that scrapes adhering matter from a surface of the transfer member by contacting the surface; a first application unit that applies a voltage, for transferring the toner image, to the opposing member; and a second application unit that applies to the transfer member a voltage having a polarity opposite to a polarity of the voltage applied by the first application unit.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: June 6, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yoshinori Takahashi
  • Patent number: 9513581
    Abstract: A transfer device (35) includes a conveyance belt (351), a transfer roller (352), and a stretch roller (354). The conveyance belt (351) is in contact with an image carrier (31) that carries a toner image, and conveys a sheet via a contact position with the image carrier (31). A voltage having a polarity opposite to a charging polarity of toner that forms the toner image is applied to the transfer roller (352), and the transfer roller (352) transfers the toner image carried by the image carrier (31) onto the sheet at the contact position. The stretch roller (354) is in an insulated state, and stretches the conveyance belt (351) at a separation position in which the sheet is separated from the conveyance belt (351) and which is downstream of the contact position in a conveyance direction in which the sheet is conveyed by the conveyance belt (351).
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: December 6, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yasuhiro Michishita, Satoshi Uemura
  • Patent number: 9383710
    Abstract: A driving transmission device includes a motor, a first pulley, a second pulley, an endless belt which is wound on the first pulley and the second pulley, dielectric layers disposed between the endless belt and the first pulley and between the endless belt and the second pulley, and a power source unit. A length of a portion of the endless belt which is wound on the second pulley is longer than a length of a portion of the endless belt which is wound on the first pulley. An amount of current supplied from the second pulley to the endless belt in a region in which the endless belt is wound on the second pulley is smaller than an amount of current supplied from the first pulley to the endless belt in a region in which the endless belt is wound on the first pulley.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: July 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Miyazawa, Yuri Mori, Kota Kiyama, Shuhei Hamada
  • Patent number: 9354587
    Abstract: An image forming apparatus, including: a rotatable image bearing member; a developing unit configured to supply a developer onto the image bearing member; a transfer unit configured to transfer the developer on the image bearing member to a recording medium by a transfer voltage being applied to the transfer unit by a voltage applying unit; and a cleaning unit configured to remove the developer on the image bearing member, wherein when the apparatus stops an image forming operation halfway, the apparatus executes a recovery operation in which the image bearing member is rotated while the voltage applying unit applies a voltage to the transfer unit so that a part of the developer remaining on the image bearing member is once transferred from the image bearing member to the transfer unit, transferred again from the transfer unit to the image bearing member, and then removed by the cleaning unit.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: May 31, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takahiro Ikeda, Yuta Isobe, Shunsuke Mizukoshi, Shuichi Tetsuno, Ryosuke Kanai
  • Patent number: 9316954
    Abstract: An image forming apparatus includes an image carrier, a transfer unit, and a control unit. The image carrier has a surface to bear a toner image thereon. The transfer unit has a transfer member to transfer the toner image onto a recording sheet conveyed in a conveyance direction for trailing-end borderless image formation and duplex image formation. The transfer unit is configured to form the toner image on the recording sheet without forming a margin at a trailing end of the recording sheet in the conveyance sheet in the trailing-end borderless image formation. The transfer unit is configured to form the toner image on front and back faces of the recording sheet in the duplex image formation. When a width of the toner image formed in a borderless image area of the recording sheet in the trailing-end borderless image formation is smaller in a direction perpendicular to the conveyance direction than a threshold value, the control unit permits the duplex image formation.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 19, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Ken Yoshida, Keiko Matsumoto, Tomohide Takenaka, Daisuke Ito, Daisuke Takahashi, Masahiro Katoh, Yoichi Sakurai
  • Patent number: 9280100
    Abstract: An image forming apparatus, which is capable of suitably preventing a separating discharge phenomenon from occurring at a fixing entrance guide for guiding a recording material to a fixing device, includes a control portion for controlling a transfer bias voltage and a separation bias voltage. A transfer roller transfers a toner image from a surface of a photosensitive drum onto a sheet at a transfer nip portion, and the control portion changes the transfer bias voltage applied to the transfer roller and the separation bias voltage applied to a charge eliminating needle to have larger voltage values before a trailing edge of the sheet, which is conveyed to the transfer nip portion and is subjected to transfer, passes through the transfer nip portion.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: March 8, 2016
    Assignee: Canon Finetech Inc.
    Inventor: Kenta Matsuzaki
  • Patent number: 9261824
    Abstract: An image forming apparatus includes an apparatus main body, a power supply switch, a photoreceptor drum, a charging device, an exposure device, a developing device, a transfer roller, a cleaning device, and a toner-layer formation unit. The transfer roller contacts the circumferential surface of the photoreceptor drum at a downstream side with respect to the developing device in the rotation direction and is configured to transfer the toner image to a sheet. The cleaning device is cleaning device arranged opposed to the photoreceptor drum, downstream. The cleaning device is configured to clean the photoreceptor drum. The toner-layer formation unit is configured to form a toner layer on a surface of the transfer roller in an initial operation started after the apparatus main body is installed in a predetermined installation location and the power supply switch is switched on.
    Type: Grant
    Filed: September 27, 2014
    Date of Patent: February 16, 2016
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Einosuke Kikuchi
  • Patent number: 9217960
    Abstract: An image forming apparatus includes: image bearing members; a belt unit including an endless belt; a slackness forming unit for performing a first function of forming a belt slacking region, at least at a portion where the belt opposes the image bearing members, by causing the slackness forming unit to act on the belt unit and for performing a second function of eliminating the belt slacking region; and a guiding unit for guiding the belt unit so that the slackness forming unit performs the first function in a state in which the belt is spaced from the image bearing members and so that the slackness forming unit performs the second function in a state in which the belt slacking region contacts the image bearing members.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: December 22, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideki Mori, Keiko Fujita, Hiroshi Saito, Hitoshi Kubota
  • Patent number: 9201387
    Abstract: In one embodiment of an image forming apparatus of the present invention, the image forming apparatus includes an opening/closing cover that is supported so as to be capable of moving relative to an image forming apparatus main body and opens/closes an opening portion of the image forming apparatus main body; and a unit installed so as to be capable of swinging on an image forming apparatus main body side of the opening/closing cover, in which when the opening/closing cover is opened/closed, the unit moves in a track that moves around a guide shaft of the unit, and in a track that moves so as to follow opening/closing of the opening/closing cover.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: December 1, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shinji Nakazawa
  • Patent number: 9182698
    Abstract: A method of transferring an image includes the steps of; bringing an image bearer bearing an image thereon as a transfer origin in contact with a transferring objective (onto which the image is transferred) as a transfer destination; moving at least one of the image bearer and the transferring objective in a prescribed direction; and sequentially transferring the image borne on the image bearer onto the transferring objective in a contacting section in which the image bearer and the transferring objective contact each other in a direction in which the image does not pass through the contacting section.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: November 10, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Junichi Ichikawa, Kenji Sengoku, Shinya Tanaka, Junpei Fujita, Kunio Hasegawa
  • Patent number: 9164462
    Abstract: An image forming apparatus includes a transfer device to transfer a toner image formed on an image bearing member onto a recording medium, a sheet separation device to separate the recording medium from the image bearing member, a sheet separation bias application device to apply to the sheet separation device a sheet separation bias in which an alternating current (AC) component is superimposed on a direct current (DC) component, and a transfer bias application device to selectively apply to the transfer device one of a DC transfer bias having a DC component and a superimposed transfer bias in which an AC component is superimposed on a DC component. Upon application of the superimposed transfer bias to the transfer device, the sheet separation bias applied to the sheet separation device is changed from the sheet separation bias applied upon application of the DC transfer bias to the transfer device.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: October 20, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keigo Nakamura, Hirokazu Ishii, Yasunobu Shimizu, Hiromi Ogiyama, Shinya Tanaka
  • Patent number: 9141075
    Abstract: An image forming apparatus including: a first body including a developing unit to perform an image forming operation on a print medium, and a second body provided above the first body to pivot between a closed position and an open position in relation to the first body, the second body including a light emitting unit, wherein the light emitting unit is directly above the developing unit when the second body is in the closed position, and the developing unit is exposed to an outside of the image forming apparatus when the second body is in the closed position. A user can place the image forming apparatus on a desktop, which increases convenience in using the apparatus. Additionally, a specialized image forming apparatus can be provided to a user who mainly wants to print and copy in small quantities.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: September 22, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-ha Choi, Kiel-jae Hur, Young-min Kim
  • Patent number: 9098052
    Abstract: An image forming apparatus includes an image bearing member, a transfer member configured to transfer a toner image formed on the image bearing member onto a recording material, and a contact-and-separation unit configured to move the transfer member to a contact position where the transfer member contacts the image bearing member and a spacing position where the transfer member is separated from the image bearing member. A control portion controls a driving unit when the transfer member is moved from the contact position to the spacing position by using a phase range and a rotational direction of a cam of the contact-and-separation unit, in which a distance between an outer circumference at an abutted portion of a supporting member and a rotation center of the cam continuously increases with rotation of the cam.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: August 4, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Keitaro Taoka
  • Patent number: 9081356
    Abstract: In one embodiment of an image forming apparatus of the present invention, the image forming apparatus includes an opening/closing cover that is supported so as to be capable of moving relative to an image forming apparatus main body and opens/closes an opening portion of the image forming apparatus main body; and a unit installed so as to be capable of swinging on an image forming apparatus main body side of the opening/closing cover, in which when the opening/closing cover is opened/closed, the unit moves in a track that moves around a guide shaft of the unit, and in a track that moves so as to follow opening/closing of the opening/closing cover.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: July 14, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shinji Nakazawa
  • Patent number: 9046828
    Abstract: An image forming apparatus includes an image carrying member, a transport belt, a driving roller, a transferring member, a nip portion, and an applying portion. The transferring member makes contact with the inner circumferential surface of the transport belt to press the transport belt against the image carrying member. The nip portion is formed between the transport belt and the image carrying member by the pressure of the transferring member. The applying portion applies a bias to the transferring member. Application of the bias to the transferring member causes, at the nip portion, the toner image carried on the image carrying member to be transferred to the recording medium carried on the transport belt. Near the nip portion, a pair of support members are arranged which keeps both width-direction end parts of the transport belt in contact with the image carrying member.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: June 2, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Shinji Yamane, Yasuhiro Michishita
  • Patent number: 9042794
    Abstract: A method, non-transitory computer readable medium, and apparatus for aligning a bias transfer roll are disclosed. For example, the method detects a position of a paper, determines a position of the bias transfer roll, calculates an offset between the position of the paper and the position of the bias transfer roll and moves the bias transfer roll laterally by an amount of the offset to align the bias transfer roll to the paper.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: May 26, 2015
    Assignee: Xerox Corporation
    Inventors: Alun Henry Hill, John Barry Poxon, Simon Neil Jowett
  • Patent number: 9031461
    Abstract: An image forming device according to one example embodiment includes a housing having an access door manually movable between a closed position and an open position. A carriage is mounted on an inner portion of the access door. A first roll is rotatably mounted to the carriage and forms a nip with a second member positioned in the interior of the housing when the access door is closed. The first roll is spaced away from the second member when the access door is open. The carriage is free to move relative to the access door and is biased away from the access door toward the second member. A clamping assembly is configured to clamp the first roll against the second member to form the nip as the access door is closed and unclamp the first roll from the second member as the access door is opened.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: May 12, 2015
    Assignee: Lexmark International, Inc.
    Inventors: Kerry Leland Embry, Bartley Charles Gould, II, James Philip Harden
  • Publication number: 20150117915
    Abstract: A position of a contact region formed between a transfer belt and a transfer member in the form of a brush is displaced toward a downstream side in a movement direction of the transfer belt with respect to the position in an initial state, whereby it is difficult to acquire excellent transferability. An image forming apparatus, in which a plurality of conductive fibers contacts an inner circumferential surface of the transfer belt, includes a support device configured to support the transfer member in such a manner that the plurality of conductive fibers is pressed between the support device and the transfer belt. A tilt amount of the conductive fiber, which is generated due to a movement of the transfer belt, is smaller than a length of a region where an image bearing member and the transfer belt contact each other in the movement direction of the transfer belt.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 30, 2015
    Inventors: Kenichi Iida, Takao Kume, Yusuke Shimizu
  • Publication number: 20150117916
    Abstract: A transfer device and an image forming apparatus having the same are provided. Shapes of cam profiles of first cam members and second cam members controlling movement of first slider members moving a first transfer roller corresponding to a black developer, and second slider members moving a second transfer roller corresponding to a color developer. Times are different as when movement of the first slider members is completed and when movement of the second slider members is completed in mode conversion among a ready mode, a mono mode and a color mode, and thus a driving load generated when the first and second cam members are rotated is reduced, non-uniformity of the rotating speeds of the first and second cam members is reduced, and problems generated due to non-uniform rotating speeds of the cam members are reduced.
    Type: Application
    Filed: December 29, 2014
    Publication date: April 30, 2015
    Inventors: Jeong Yong JU, Jun Ho LEE, Byeong Hwa AHN
  • Patent number: 9014605
    Abstract: An image forming apparatus includes: a developer-image carrier; a conveyance belt that contacts the developer-image carrier and conveys a developer image; and a transfer member contacting the conveyance belt from an opposite side of the developer-image carrier to transfer the developer image onto the conveyance belt. The transfer member includes a main roller body and a movable member including a first end portion fixed to a circumferential surface of the main roller body and a second end portion extending outward in a radial direction of the main oiler body and movable with respect to the first end portion. A rotation axis line of the main roller body is provided downstream of the rotation axis line of the developer-image carrier in a movement direction of the conveyance belt such that the main roller body contacts the developer-image carrier while interposing the conveyance belt therebetween.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: April 21, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Yasuhiro Maruyama
  • Patent number: 9002246
    Abstract: A transfer device includes a first support member that supports a wound member, an endless transferred body being wound around the wound member; a second support member that supports a transfer member, the transfer member and the wound member pinching the transferred body and a recording medium, the transfer member causing a developer image on the transferred body to be transferred onto the recording medium; a coupling portion that couples the second support member to the first support member so that an angle of the second support member is changeable relative to the first support member; and an urging portion that is provided at the first support member and urges the second support member in a direction in which the transfer member presses the wound member.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: April 7, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Koji Deguchi, Akihiro Ouchi, Hiroaki Yagi, Arichika Tanaka, Koichi Sato, Kazuyuki Yagata, Hibiki Sasaki, Kaoru Matsushita, Yuichi Fujisawa
  • Patent number: 8998786
    Abstract: This invention provides a process for producing a conductive rubber roller having small aspect ratios of inner and outer diameters, having a stable measure of its inner diameter, having uniform cell distribution and being free from non-uniformity of hardness and electrical resistance in the peripheral direction. The process has a step of continuously extruding a tube composed of a specific unvulcanized rubber composition from a rubber extruder in a microwave vulcanizing unit, and a step of foaming and vulcanizing the tube by using a microwave irradiator having a microwave irradiation zone 4 m or less in length while being transported at given speed. The foamed rubber tube has an inner diameter 20 to 35% smaller than the outer diameter of the conductive core material over the whole region in the lengthwise direction, and the conductive core material is press-fitted into the foamed rubber tube without using any adhesive.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Imasaka, Satoshi Fukuzawa, Mitsuru Okuda, Erika Uematsu
  • Publication number: 20150087488
    Abstract: A semiconductive roller to stably generate high-quality images for a long period of time by efficiently inhibiting migration of free epichlorohydrin (ECH) component to a surface of the semiconductive roller includes an elastic layer formed of a semiconductive rubber composition including about 50 to about 70 parts by weight of a base rubber and about 30 to about 50 parts by weight of a hydrin rubber. An extracted amount of the ECH component from the elastic layer is about 2% by volume or less, wherein the extracted amount is determined based on a reduced amount of chlorine (Cl) intensity measured using X-ray fluorescence (XRF) analysis performed before and after extraction of the ECH component from the elastic layer using tetrahydrofuran (THF).
    Type: Application
    Filed: January 30, 2014
    Publication date: March 26, 2015
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Kwang-ho KANG, Jae-hyeuk JEONG, Jung-ik CHOI
  • Patent number: 8971767
    Abstract: A charge applying member includes a conductive roller and a shaft. The conductive roller includes a first region in contact with a member to be charged and facing an image forming region of the member to be charged and a second region next to a longitudinal end of the first region and facing a region of the member to be charged outside the image forming region and is configured to apply a charge to the member to be charged. The shaft formed of a metallic material inserted into the conductive roller and configured to be given a voltage from a power supply. A region plated with a metal having a lower ionization tendency than the shaft is formed as a plated region on a surface portion of the shaft corresponding to the first and second regions and a non-plated region is formed on a surface portion of the shaft corresponding to the second region.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: March 3, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Ai Takagami, Takahiko Murata, Yoshimi Shimizu, Maki Ike, Kanako Morimoto
  • Patent number: 8965245
    Abstract: An electrostatographic printing apparatus that includes a charge receptor endless belt; a transfer nip including a BTR roll in contact with the charge receptor at a transfer zone, a continuous media supplied to the transfer zone, and the transfer nip adapted for systematic engagement and disengagement with the continuous media for synchronization of image transfer from the charge receptor to the media. More specifically, in response to recognition of imaging inconsistencies such as belt seams, test patches, or label format pitches, the endless belt disengages from the continuous media at the BTR roll. The BTR roll is appropriately turned on and off and the continuous media reversed in direction commonly known as a ‘Pilgrim step’, then returned to normal direction to synchronize the transfer of images to the continuous media, wherein there is substantially zero wrap of the continuous media on the BTR roll during the engagement of the continuous media with the charge receptor belt.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: February 24, 2015
    Assignee: Xerox Corporation
    Inventors: Mark A. Atwood, Roger Gaylord Leighton
  • Patent number: 8955842
    Abstract: A belt unit includes a rotatable endless belt for receiving a toner image thereon or for conveying a transfer material, wherein the endless belt has a smooth-shaped inner peripheral surface, a first reinforcing member, provided on an outer peripheral surface of the endless belt at one end portion with respect to a belt widthwise direction, for reinforcing the endless belt, and a second reinforcing member, provided on the outer peripheral surface of the endless belt at the other end portion. In addition, a driving roller rotationally drives the endless belt while supporting the inner peripheral surface of the endless belt.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kei Sawanaka, Takashi Seki, Jiroh Itoh, Kazuaki Takahashi
  • Patent number: 8958709
    Abstract: In an image forming apparatus, one of a plurality of support members supporting an intermediate transfer belt is a guide member configured to regulate the rotational direction of the intermediate transfer belt while being held in sliding contact with the intermediate transfer belt at a position opposite the secondary transfer member across the intermediate transfer belt. This guide member is equipped with a first resistor portion in sliding contact with the intermediate transfer belt and a second resistor portion of a higher electrical resistance than the first resistor portion, with the second resistor portion provided upstream of the first resistor portion in the rotational direction of the intermediate transfer belt.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Suzuki, Masaru Shimura, Shinji Katagiri, Tatsuya Kinukawa, Shigeru Hoashi, Akinori Takayama, Takeo Kawanami, Michio Uchida
  • Publication number: 20150041725
    Abstract: An electrically conductive rubber composition is provided, which comprises a rubber component including an SBR, an EPDM and an epichlorohydrin rubber, a crosslinking component and an azodicarbonamide foaming agent having a volume-based median diameter of 20 to 40 ?m. The azodicarbonamide foaming agent is blended in a proportion of 0.5 to 8 parts by mass based on 100 parts by mass of the overall rubber component. A transfer roller (1) is produced by extruding the electrically conductive rubber composition into an elongated tubular body, and continuously feeding out the tubular body in the elongated state without cutting the tubular body to continuously pass the tubular body through a microwave crosslinking device and a hot air crosslinking device to continuously foam and crosslink the tubular body.
    Type: Application
    Filed: July 22, 2014
    Publication date: February 12, 2015
    Inventors: Naoyuki SATOYOSHI, Yusuke TANIO
  • Publication number: 20150034877
    Abstract: An electrically conductive rubber composition is provided, which comprises a rubber component including an SBR, an EPDM and an epichlorohydrin rubber, a crosslinking component and an azodicarbonamide foaming agent having an average particle diameter of 3 to 11 ?m. The azodicarbonamide foaming agent is blended in a proportion of 0.5 to 8 parts by mass based on 100 parts by mass of the overall rubber component. A transfer roller (1) is produced by extruding the electrically conductive rubber composition into an elongated tubular body, and continuously feeding out the tubular body in the elongated state without cutting the tubular body to continuously pass the tubular body through a microwave crosslinking device and a hot air crosslinking device to continuously foam and crosslink the tubular body.
    Type: Application
    Filed: July 18, 2014
    Publication date: February 5, 2015
    Inventors: Yusuke TANIO, Naoyuki SATOYOSHI
  • Patent number: 8948654
    Abstract: A transfer device and an image forming apparatus having the same are provided. Shapes of cam profiles of first cam members and second cam members controlling movement of first slider members moving a first transfer roller corresponding to a black developer, and second slider members moving a second transfer roller corresponding to a color developer. Times are different as when movement of the first slider members is completed and when movement of the second slider members is completed in mode conversion among a ready mode, a mono mode and a color mode, and thus a driving load generated when the first and second cam members are rotated is reduced, non-uniformity of the rotating speeds of the first and second cam members is reduced, and problems generated due to non-uniform rotating speeds of the cam members are reduced.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jeong Yong Ju, Jun Ho Lee, Byeong Hwa Ahn
  • Patent number: 8948669
    Abstract: A transfer device includes a transfer roller that has a characteristic in which an electrical resistance is changed in accordance with a rotation speed, contacts a transferred body that moves in synchronization with movement of an image holding body holding a toner image, and transfers the toner image held by the image holding body on the transferred body by applying a transfer voltage to the transferred body; and a regulator that regulates the rotation speed of the transfer roller independently from the movement of the image holding body and the transferred body.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: February 3, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masato Ono, Haruyuki Namba
  • Publication number: 20150030357
    Abstract: A belt unit is provided with an endless belt, a driving roller, and a pair of guide ribs. The driving roller is disposed on an inner peripheral surface side of the endless belt and drives the endless belt. The pair of guide ribs is placed on each opposite widthwise end of the inner peripheral surface of the endless belt and contacts both end faces of the driving roller, thus preventing meandering of the endless belt. Additionally, the driving roller is equipped with a low friction region at both opposite lengthwise ends in a predetermined width and the low friction region is configured to have a friction coefficient that is lower than a friction coefficient of a region adjacent to the low friction region.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Inventors: Fumito MIZOGUCHI, Masashi HIRAI, Toshiki TAKIGUCHI
  • Patent number: 8942603
    Abstract: A developing device includes a static latent image supporting member having a photosensitive layer and being arranged to be rotatable; a developer supporting member arranged to be rotatable for developing a static latent image formed on the static latent image supporting member using developer to form an image; a developer supplying member arranged to contact with the developer supporting member and be rotatable for supplying developer; and a drive transmission unit disposed on a side of same end portions of the developer supporting member and the developer supplying member for rotating the developer supporting member and the developer supplying member in a same rotational direction. The developer supplying member is formed so that an outer diameter thereof on a side of the drive transmission unit becomes smaller than an outer diameter thereof on an opposite side.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 27, 2015
    Assignee: Oki Data Corporation
    Inventor: Toshiharu Sato
  • Patent number: 8942606
    Abstract: An image forming apparatus that transfers a developer image onto a sheet and forms the developer image on the sheet includes a developer image carrier, a first pressing member, a transfer member, a first voltage supply, and an adherence part. The developer image carrier holds the developer image and moves in a predetermined direction in which the sheet is being carried. The first pressing member presses against the developer image carrier from a side opposite to a side on which a developer image is held. The transfer member is arranged against the first pressing member through the developer image carrier, the first pressing member and the transfer member being responsive to a first voltage applied therebetween to transfer the developer image from the developer image carrier toward the transfer member. The adherence part adheres the sheet to the developer image carrier upstream the first pressing member in the predetermined direction.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: January 27, 2015
    Assignee: Oki Data Corporation
    Inventor: Yoshitaka Miyazaki