Alignment Or Tensioning Patents (Class 399/165)
  • Patent number: 11003121
    Abstract: There is provided printing equipment that enhances the overprinting position accuracy in overprinting and a printing method for the printing equipment. In the printing method, a paper meandering profile acquisition part acquires a meandering profile of paper from a result of detection by a paper deviation detection sensor. A paper speed profile acquisition part acquires a paper speed profile from a result of detection by a paper conveyance speed detection sensor. A paper feed error calculator calculates a paper feed error on the basis of the meandering profile and paper speed profile. A paper feed error corrector corrects the image formation timing on the basis of a result of calculation by the paper feed error calculator.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: May 11, 2021
    Assignee: Konica Minolta, Inc.
    Inventors: Eiji Nishikawa, Takahiro Yokoya
  • Patent number: 10739709
    Abstract: A fixing device includes a fixing belt, a pressuring member, a supporting member arranged inside the fixing belt, a nip forming member, a cap supporting an end of the fixing belt and a pivot supporting member. The nip forming member attached to the supporting member sandwiches the fixing belt with the pressuring member. The pivot supporting member attached at an end of the supporting member pivotally supports the cap. The pivot supporting member includes a positioning member fitted on the supporting member from an end side and locked to the supporting member at a center side, and a fastening member fitted on the supporting member and the positioning member and fastened to the supporting member. The positioning member and the fastening member fitted to each other constitute the outer face of the pivot supporting member along an inner face of the cap.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: August 11, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Takafumi Nakagawa
  • Patent number: 10678167
    Abstract: Provided is an endless belt which can improve rotational durability when compared to a conventional endless belt. This endless belt is formed in a tubular shape and is used for electronic photographing apparatuses. The endless belt has an edge part which is formed on at least one belt edge in the belt width direction and which has an end that is tapered toward the outside of the belt width direction. The edge part can be configured by a first edge part formed by intersecting an outer inclined surface with a belt inner circumferential surface, a second edge part configured by intersecting an inner inclined surface with a belt outer circumferential surface, or a third edge part configured by intersecting the outer inclined surface with the inner inclined surface.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: June 9, 2020
    Assignee: Sumitomo Riko Company Limited
    Inventors: Daiki Ito, Teruyoshi Kimpara, Tsukasa Fujita, Satoshi Endo
  • Patent number: 10496017
    Abstract: A belt device includes a plurality of support rotators, a belt, a rotator inclination unit, a belt tension adjuster, and a descent stopper. The belt is looped around the plurality of support rotators and rotated by rotation of the plurality support rotators. The rotator inclination unit inclines a rotation axis of a first support rotator of the plurality of support rotators relative to a rotation axis of another support rotator of the plurality of support rotators that is different from the first support rotator. The belt tension adjuster adjusts tension of the belt, and the descent stopper prevents the first support rotator from descending.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: December 3, 2019
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiki Hozumi
  • Patent number: 10197951
    Abstract: An image forming apparatus includes: a conveyance section configured to convey a sheet in a direction opposite to a first conveyance direction during image formation, the direction being a second conveyance direction; and a distortion correction section disposed on an upstream side of a transfer nip in the first conveyance direction and configured to correct, when the sheet is conveyed by the conveyance section in the second conveyance direction, distortion of the sheet generated when the sheet passes through a fixing nip.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: February 5, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shota Sakurai, Hiroshi Morimoto, Wataru Watanabe, Kazuteru Ishizuka, Tatsuya Furuta
  • Patent number: 10073385
    Abstract: In an image forming apparatus including a pressing member arranged on an inner circumferential surface of an intermediate transfer belt, configured to correct a position of the intermediate transfer belt in the width direction to be fit within a movable region, positions of both ends of the pressing member in the width direction are respectively arranged outside positions of both ends of the movable region.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: September 11, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuomi Murayama
  • Patent number: 9696666
    Abstract: In an image forming apparatus including a pressing member arranged on an inner circumferential surface of an intermediate transfer belt, configured to correct a position of the intermediate transfer belt in the width direction to be fit within a movable region, positions of both ends of the pressing member in the width direction are respectively arranged outside positions of both ends of the movable region.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: July 4, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tatsuomi Murayama
  • Patent number: 9575437
    Abstract: An image forming apparatus includes a toner image carrying drum; and an image transfer unit including an endless belt, first and second belt stretching rollers, and an adjusting unit for adjusting belt movement in a widthwise direction by inclining the first roller relative to the second roller. The adjusting unit includes a contacting member provided between the first roller and the drum and contacting with an inner surface of the belt. The contacting member contacts the inner surface of the belt at a position in a drum side across a common internal tangent between the drum and such a portion of a surface of the first roller as is moved closest to the drum by the adjusting unit, the common internal tangent being the one contacting a portion of the drum adjacent to a drum-belt contact position and contacting a portion of the first roller adjacent to a first-roller-belt contact position.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: February 21, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuhiko Oba, Takeo Kawanami
  • Patent number: 9557690
    Abstract: An image forming apparatus includes a slider movable from a first position to a second position against a spring force for urging a primary transfer roller to an intermediary transfer belt to space the primary transfer roller from the intermediary transfer belt. An assisting mechanism assists the movement of the slider in a first direction. The assisting mechanism includes vertical and horizontal sliders which cause to apply the urging force of a compression spring to the slider as an urging force in the first direction, from a third position which is between the first position and the second position.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: January 31, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Fukashi Hatano
  • Patent number: 9280102
    Abstract: An image heating apparatus includes: a rotatable heating member; a belt unit including an endless belt configured to heat the rotatable heating member, and a supporting portion configured to rotatably support an inner surface of the belt; a holding portion configured to rotatably hold the belt unit; a detecting portion configured to detect that the belt is out of a predetermined zone with respect to a widthwise direction of the belt; a tilting portion configured to tilt the belt unit relative to the holding portion in a direction of causing the belt to return into the predetermined zone on the basis of an output of the detecting portion; and a limiting portion configured to limit tilting of the belt unit to an angle exceeding a predetermined angle range wider than an angle range in which the belt unit is capable of being tilted by the tilting portion.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: March 8, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuya Hasegawa
  • Patent number: 9268274
    Abstract: There is provided a fixing device that may include: an endless belt having an inner peripheral surface defining an internal space and configured to circularly move about a first axis extending in an axial direction; a heater and a nip plate extending through the internal space; a rotary body; a restricting member and a biasing member. The rotary body and the nip member may nip the endless belt therebetween. The restricting member may restrict displacement of the endless belt in the axial direction, the restricting member having a restricting surface configured to oppose an axial end face of the endless belt in the axial direction. The biasing member may bias the restricting member toward the axial end face of the endless belt.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: February 23, 2016
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomohiro Kondo
  • Patent number: 9261854
    Abstract: A frame of an apparatus includes first and second skeleton frames arranged to face each other and third and fourth skeleton frames configured to couple the first and second skeleton frames. A first installation portion is provided on the third skeleton frame at a position closer to the second skeleton frame side than a center portion of the third skeleton frame. Second and third installation portions are provided on the fourth skeleton frame. A coupling stay includes a first end portion fixed to the third skeleton frame at a position closer to one skeleton frame out of the first and second skeleton frames than the center of the third skeleton frame and a second end portion fixed to the other skeleton frame out of the first and second skeleton frames at a position closer to the fourth skeleton frame side than the third skeleton frame.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: February 16, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Tomonori Kitan
  • Patent number: 9244403
    Abstract: A fixing device includes a heating member heating a recording medium to fix a developer image thereto; an endless heating belt rotatably wrapped around the heating member and heating the medium; a rotating member around which the belt is wrapped and having a fixed first axial end; a position detecting unit detecting a position of the belt when moved in first and second opposite directions parallel to an axial direction of the rotating member; and a controller controlling a rotational movement angle by which a second axial end of the rotating member is rotationally moved about the first end in an axis-intersecting direction based on information from the position detecting unit when the belt is moved in the first and second directions so that first and second speeds for respectively moving the belt in the first and second directions are made equal to or close to each other.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yoshihiro Hayashi, Yasuto Okabayashi, Toshiyuki Miyata
  • Patent number: 9223268
    Abstract: A fixing device includes a first support and a second support to rotatably support a fixing rotator at a first lateral end and a second lateral end of the fixing rotator in an axial direction thereof. A first stopper is mounted on the first support. A second stopper is mounted on the second support. A first skew restraint projects from an outer circumferential surface of the fixing rotator radially at the first lateral end of the fixing rotator in the axial direction thereof. A second skew restraint projects from the outer circumferential surface of the fixing rotator radially at the second lateral end of the fixing rotator in the axial direction thereof. The second skew restraint comes into contact with the second stopper as the fixing rotator moves in the axial direction thereof toward the first support.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: December 29, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshiki Yamaguchi, Kazuhito Kishi, Masahiro Samei, Ippei Fujimoto, Misaki Shimizu, Yukiko Nakajima, Keisuke Kawabata, Yasunori Ishigaya, Haruyuki Honda
  • Patent number: 9213301
    Abstract: An image forming apparatus includes; a belt unit detachably mountable to a main assembly, said belt unit including a movable endless belt, a belt supporting roller, a steering unit for swinging the belt to incline relative to the supporting roller by a force produced by movement of the belt in a widthwise direction, and a cleaning unit, supported by the steering unit, for removing and collecting toner from the belt; a toner receiving unit, provided in the assembly, for receiving the toner collected by the cleaning unit; and a path member for guiding the toner collected by the cleaning unit to the toner receiving unit, the path member being supported by the assembly when the belt unit is not mounted, and the path member being supported by the cleaning swingably relative to the toner receiving unit when the belt unit is mounted.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: December 15, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ran Kudo, Jirou Makinodan
  • Patent number: 9201350
    Abstract: Provided is an image forming apparatus including plural image holding members that have toner images formed on respective surfaces thereof, image forming sections that form the toner images on the plural image holding members, respectively, a belt member that has an endless belt shape, plural transfer members each of which nips the belt member between the transfer member and a corresponding image holding member, a moving mechanism that individually moves the plural transfer members between a first place and a second place, plural rod-shaped rotating members around which the belt member is stretched and rotated, an adjusting member that adjusts a position of the belt member, an initializing mechanism that performs an initialization processing of returning the inclination of the adjusting member to an initial state, and a controller that starts the initialization processing by the initializing mechanism.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: December 1, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Kenji Shimizu
  • Patent number: 9195177
    Abstract: A belt driving device includes first and second steering rollers to stretch an endless belt, first and second pivoting mechanisms, and first and second detecting members to detect a position of the belt A first setting portion sets first and second pivoting instruction values through which the first and second steering rollers are pivoted in the same direction, and a second setting portion sets third and fourth pivoting instruction values through which the first and second steering rollers are pivoted in the opposite directions. A controller pivots the first steering roller by the first pivoting mechanism on the basis of an addition value of the first pivoting instruction value and the third pivoting instruction value, and pivots the second steering roller by the second pivoting mechanism on the basis of an addition value of the second pivoting instruction value and the fourth pivoting instruction value.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: November 24, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Miyazawa, Takaaki Aoyagi, Yuri Mori, Hisatoshi Baba
  • Patent number: 9141043
    Abstract: A transport device includes a belt-shaped member that is rotated so as to transport an object, a first support member that supports the belt-shaped member, an urging member extending in an axial direction of the first support member, and a conversion unit that converts a direction of an urging force of the urging member to a direction toward the belt-shaped member.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: September 22, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Mikio Saiki
  • Patent number: 9031479
    Abstract: An image forming apparatus includes an image forming unit, a belt position detection unit to detect a position of a transfer belt in a rotating shaft direction of a driving roller, and a roller driving unit to tilt a steering roller to control the position of the transfer belt in the rotating shaft direction of the driving roller. In addition, a storage unit stores a reference position of the steering roller and a reference position of the transfer belt, and a control unit controls a formation position of the latent image, in a rotation axis direction of each photosensitive member, formed on each of a plurality of photosensitive members by the image forming unit based on a position of the transfer belt, in the rotating shaft direction of the driving roller, with respect to a detected reference position of the transfer belt and a tilt amount of the steering roller controlled by the roller driving unit with respect to the reference position of the steering roller.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: May 12, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jiro Shirakata, Keitaro Taoka
  • Patent number: 8929774
    Abstract: A belt unit is detachably attached to a housing. A holder changes a state of an endless belt by moving a transfer roller between a first state as an endless belt movement state and a second state as a detachment state. The first state allows the endless belt to circulate for image formation, and the second state allows the belt unit to be detached from the housing. The holder moves the transfer roller adjacent supporter independently of the transfer roller and lifts the opening in the endless belt to a prescribed position to expose it to the front side plate.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsutomu Katoh, Yohhei Watanabe, Yuji Kato, Yoshihisa Watanabe, Hajime Teraji, Arinobu Yoshiura
  • Patent number: 8929775
    Abstract: A belt drive device for an image forming apparatus includes a belt, a roller, a roller drive member, a state detector and a controller. The roller drive member drives the roller that entrains the belt. The state detector detects a state of the belt. The controller identifies a specific portion of the belt based on the state detected by the state detector, and controls the roller drive member to stop the belt so that the specific portion lies at a predetermined position.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: January 6, 2015
    Assignee: Oki Data Corporation
    Inventor: Yukifumi Ito
  • Patent number: 8909101
    Abstract: An image forming apparatus includes a belt member; a toner image forming portion for forming a toner image on the belt member; a transfer portion where the toner image formed on the belt member is to be transferred onto a recording material; a recording material supplying portion for supplying the recording material to the transfer portion; a steering portion for adjusting a widthwise position of the belt member by being tilted; and an adjusting portion for adjusting a conveyance direction of the recording material supplied by the recording material supplying portion so that a conveyance direction of the belt member when the steering portion is tilted is the same as the conveyance direction of the recording material supplied by the recording material supplying portion.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: December 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jiro Shirakata
  • Patent number: 8881891
    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: Grant
    Filed: November 19, 2012
    Date of Patent: November 11, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Fumito Mizoguchi, Masashi Hirai, Toshiki Takiguchi
  • Patent number: 8879968
    Abstract: An image forming apparatus includes an image bearing member, a medium transport member, an image transfer member, a first detection member detecting widthwise deviation of the image bearing member, a first deviation correcting member tiltable relative to the width direction and supporting the image bearing member, a first correction control section tilting the first deviation correcting member to correct deviation of the image bearing member, a second detection member detecting widthwise deviation of the transport member, a second deviation correcting member tiltable relative to the width direction and supporting the transport member, and a second correction control section tilting the second deviation correcting member to correct deviation of the transport member.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: November 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masaaki Takahashi, Yasuhiro Shimada, Takashi Hoshino, Koichi Sato, Kazutoshi Sugitani, Yusuke Sakai, Koji Deguchi, Kazuyoshi Hagiwara
  • Patent number: 8879931
    Abstract: An image forming apparatus includes an image bearing member; an endless belt; a first driver for driving the belt in contact to an inner surface of the belt; a second driver for driving the belt in contact to an outer surface of the belt; and a tension detector for detecting a state of tension of the belt. The tension detector includes: a movable device, contacted to the belt in a region downstream of the second driver and upstream of the first driver and in a region upstream of the second driver and downstream of the first driver with respect to a rotational direction of the belt, capable of moving its position depending on the tension of the belt in the two regions; a member-to-be-detected capable of changing its position in interrelation with the movement of the movable device; and a detecting device for detecting the member-to-be-detected.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shinya Kawakami
  • Patent number: 8874002
    Abstract: A belt member driving device includes an arm configured to be movable with movement of a belt member in a width direction thereof while being in contact with an end of the belt member in the width direction thereof, a first detected portion provided on the arm, a second detected portion provided on the arm and disposed in a position different from that of the first detected portion in a direction perpendicular to a movement direction of the arm on a plane where the arm is moved, a first sensor configured to detect the first detected portion, and a second sensor configured to detect the second detected portion. The second sensor and the first sensor partly overlap each other in the movement direction of the arm as viewed in a direction perpendicular to the movement direction of the arm.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: October 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomohito Nakagawa
  • Patent number: 8867961
    Abstract: An image forming apparatus includes a storage unit configured to store a first tilted position of a roller at which meandering of the belt can be prevented in a state that the belt abuts on the image bearing member and a second tilted position of the roller at which meandering of the belt can be prevented in a state that the belt is separated from the image bearing member, and a control unit configured to move the roller to the first tilted position if the belt abuts on the image bearing member while the belt is conveyed and move the roller to the second tilted position if the abutment of the belt on the image bearing member is cancelled while the belt is conveyed.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: October 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Jun Nakazato
  • Patent number: 8837997
    Abstract: A belt driving device includes an endless belt, a tension roller, a shaft member, deviation transfer members, and biasing members. The deviation transfer members are fitted over the shaft member in such a manner as to adjoin respective of opposite ends of the tension roller in an axial direction of the tension roller. Of the deviation transfer members, at least that deviation transfer member which is located on a downstream side in a deviation direction along the axial direction is movable together with the endless belt along the shaft member. Each of the biasing members has an acting end pivotally supported on an associated one of the deviation transfer members and a base end pivotally supported on an associated one of apparatus frames at a predetermined position.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 16, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shotaro Okamoto, Masaki Saka
  • Patent number: 8837989
    Abstract: A belt driving apparatus includes a movable belt member, a stretching member configured to stretch the belt member, and a steering unit configured to stretch the belt member and to be inclined to steer the belt member in a widthwise direction substantially perpendicular to a direction of moving of the belt member. The steering unit includes a rotatable member contacting an inner surface of the belt member and configured to be rotatable with movement of the belt member around a rotational axis of the rotatable member, with the rotational axis extending in the widthwise direction, and non-rotatable members contacting an inner surface of the belt member, provided at each opposite axial end of the rotatable member and configured not to be rotatable with movement of the belt member.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Yasumoto
  • Patent number: 8831446
    Abstract: An image forming apparatus includes a rotatable belt member, a plurality of image forming members opposing the belt in an image forming region, a first detecting member configured to detect a position of the belt member with respect to a widthwise direction, a second detecting member configured to detect a moving direction, an adjusting roller configured to adjust the moving direction in the image forming region, the adjusting roller configured to adjust the moving direction in the image forming region, and a control portion configured to control a position of the adjusting roller on the basis of outputs of the first detecting member and the second detecting member without changing a position of the belt member in the image forming region in a direction perpendicular to a surface of the belt member.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 9, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Matsumoto, Sumitoshi Sootome, Yasumi Yoshida, Shinji Yamamoto, Takashi Hiratsuka, Toshihiro Fukasaka
  • Patent number: 8824939
    Abstract: An image forming apparatus includes an image bearing member; a rotatable belt member; a rotatable supporting roller for stretching the belt member; and a steering roller controlled by motors for stretching the belt member and for moving the belt member in a widthwise direction by an inclining operation. A number of sensors detect the position of the belt member in the widthwise direction and produce an output, causing a first controller to change the amount of the inclining operation of the steering roller in order to counter the force moving the belt member in the widthwise direction. The output of the sensors also causes a second controller to change the amount of the inclining operation of the steering roller in short intervals to reduce the rapid positional deviation of the belt member attributable to the inclination of the steering roller.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: September 2, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Yamamoto, Yasumi Yoshida, Toshihiro Fukasaka, Tadashi Matsumoto, Takashi Hiratsuka, Sumitoshi Sotome
  • Patent number: 8818239
    Abstract: An apparatus includes a belt member, a first image bearing member, a second image bearing member provided downstream of the first image bearing member, and a first steering roller provided upstream of the first image bearing member for controlling a widthwise position of the belt member by inclining at a position. In addition, a second steering roller is provided downstream of the second image bearing member and controls the widthwise position of the belt member, a first detecting member detects a widthwise position of the belt member on the first image bearing member, and a second detecting member detects a widthwise position of the belt member on the second image bearing member.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 26, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Yamamoto, Yasumi Yoshida, Tadashi Matsumoto, Takashi Hiratsuka, Toshihiro Fukasaka
  • Patent number: 8792812
    Abstract: An image forming device, comprising: an image formation unit; an endless belt; first, second and third rollers arranged in parallel such that the belt extends therebetween; a collar that is provided at least at one of ends in an axial direction of the first roller and moves in the axial direction when the belt moves obliquely; a press arm that presses an one axial end side of the second roller on which the collar is provided; and an oblique motion force conversion unit that includes a cam on which an slanting surface is formed and a movable part slidably contacting the slanting surface, and that converts a force for moving the collar into a pressing force for pressing the press arm, and wherein the slanting surface becomes closer to a rotation center of the first roller at a point further from the belt.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: July 29, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Michio Fujioka
  • Patent number: 8774687
    Abstract: A belt driving apparatus includes: an endless belt having a stepped region at its edge; a driving member for driving the endless belt; a moving member for moving the endless belt in a widthwise direction; a mark provided at a part of the endless belt with respect to a circumferential direction and located at a position corresponding to the stepped region of the endless belt with respect to a rotational direction; a mark detecting member for detecting the mark during rotation of the endless belt; an edge position detecting member for detecting a widthwise position of at least one of edges of the endless belt during rotation; and a controller for controlling, after the mark detecting member detects the mark, the moving member on the basis of a detection result of the edge other than the stepped region of the endless belt.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: July 8, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Shimizu, Keitaro Taoka
  • Patent number: 8768216
    Abstract: A processor places a printer apparatus in a reduced activity mode after printing requests have not been received for an “inactivity” time period. A belt support device rotates a photoreceptor belt at a reduced speed when the printer apparatus enters the reduced activity mode and for a “delay” time period after the printer apparatus enters the reduced activity mode. The belt support device returns the rotational speed of the photoreceptor belt to the original speed if a new printing request is received during the delay time period. However, the belt support device stops rotation of the photoreceptor belt and reduces the belt tension if the delay time period expires without receiving a new printing request.
    Type: Grant
    Filed: August 20, 2012
    Date of Patent: July 1, 2014
    Assignee: Xerox Corporation
    Inventors: Michael L. Gumina, Mark A. Atwood, John T Buzzelli
  • Patent number: 8689967
    Abstract: A belt driving device that drives a belt includes a plurality of rollers, an endless belt tensioned on the plurality of rollers, a belt guide member that is mounted on at least one end of at least one roller of the plurality of rollers and that guides a side edge part of the belt, and a belt displacement device that is mounted on the same end of the one roller as the belt guide member in order to displace the side edge part of the belt in a direction away from the belt guide member. Wherein a portion of the belt displacement device is located on a downstream side of the belt guide member in a traveling direction of the belt, and the portion continuously contacts the side edge part of the belt.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: April 8, 2014
    Assignee: Oki Data Corporation
    Inventor: Makoto Kitamura
  • Patent number: 8666284
    Abstract: An upstream end of a guide surface of a recording material guide in the recording-material conveying direction is located on the same side as a separation belt-stretching roller with respect to an extension of the belt surface from the separation belt-stretching roller to a recessed portion formed in the belt surface by the separation assistance rollers.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: March 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yutaka Kakehi
  • Patent number: 8643901
    Abstract: A detection apparatus includes the following elements. A first measuring unit measures, from a binary image, density levels of first and second regions which are alternately arranged in a first direction in the binary image, the binary image being disposed on a second surface of a holding member which includes a first surface and the second surface. A storage unit stores therein information indicating an association between a distance from the first measuring unit to the second surface and a contrast between the adjacent first and second regions. A calculator calculates a contrast between the adjacent first and second regions. A detector specifies a distance corresponding to the calculated contrast by using the stored information, and detects a deflection of the holding member in the first direction by using the specified distance as the distance from the second surface to the adjacent first and second regions.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: February 4, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Yoshiro Yamaguchi
  • Patent number: 8602208
    Abstract: An intermediate transfer unit includes a shaft, a joint member, an apparatus frame and a supporting member. The joint member includes a first concave portion in which a first end portion in a longitudinal direction of the shaft is fittable at a plurality of angles around a first axis of the shaft, and a first peripheral portion having a second axis that is parallel to but does not share the same straight line with the first axis. The apparatus frame has a through hole. The supporting member has a second concave portion which the first peripheral portion is attachable to and removable from at a plurality of angles around the second axis, and is insertable into and removable from the through hole in the longitudinal direction.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: December 10, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Tachiki, Shohtaroh Okamoto
  • Patent number: 8577261
    Abstract: A belt member is supported by a plurality of rollers and moves in a predetermined moving direction. A detecting unit detects a displacement of the belt member in its width direction. A correcting unit moves a second end of a first roller from among the rollers in either one of a forward direction and a backward direction while fixing its first end based on a result of detecting the displacement of the belt member such that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member. An adjusting unit adjusts a fixing position of the first end.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: November 5, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Makoto Nakura, Junji Shirakawa, Hiroshi Suzuki
  • Patent number: 8523176
    Abstract: A protrusion (13a) and a protrusion (13b) are formed a predetermined distance apart in the direction of a shaft in the outer circumferential surface of the roller main body (11). The cross sections of the protrusion (13a) and the protrusion (13b) are shaped such that a center portion of the roller main body (11) in the direction of the shaft is a boundary (14), and that on the left side of the boundary (14), a vertex (131a) is displaced to the left side from the perpendicular bisector (133a) of an opposite side (132a) whereas on the right side of the boundary (14), a vertex (131b) is displaced to the right side from the perpendicular bisector (133b) of an opposite side (132b). In this way, in a metallic movement roller that moves a strung endless belt, the winding movement and the like of the belt can be prevented, and the belt can be intentionally moved in a specific direction.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: September 3, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Jun Saito
  • Patent number: 8514463
    Abstract: An image processing apparatus is provided. The image processing apparatus includes a lower unit, an upper unit, a joint piece to connect the upper unit with the lower unit, a flat cable, and a holder piece, which is movable with respect to one of the upper unit and the lower unit when the upper unit is moved with respect to the lower unit. The holder piece includes a first opening, a second opening, and a path connecting the first opening and the second opening to hold the flat cable therein in a curved posture. When the upper unit is vertically moved, the holder member is vertically moved with respect to the one of the upper unit and the lower unit by shifting a range of curvature in the flat cable as the flat cable is pulled out of and withdrawn in the holder member.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: August 20, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takashi Fujiwara
  • Publication number: 20130164034
    Abstract: A passive belt steering apparatus includes a steering linkage at two ends of a steering roll. The steering linkage includes a fixed support and a steering link movably connected to the fixed support and a steering roll at to pivot points. The two pivot points are offset from one another to accommodate passive hard axis roll alignment in response to an axial force to the steering roll applied by a misaligned or incorrectly positioned belt.
    Type: Application
    Filed: December 23, 2011
    Publication date: June 27, 2013
    Applicant: XEROX CORPORATION
    Inventor: David Kenneth AHL
  • Patent number: 8467711
    Abstract: An image forming apparatus, a fixing unit and a belt assembly thereof are disclosed. The image forming apparatus, the fixing unit and the belt assembly includes a frame, a belt rotatably disposed at an outer periphery of the frame, and a lateral slip prevention member which presses at least a portion of the belt to cause the belt to move in a direction of mitigating undesirable lateral movement of the belt.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: June 18, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventor: Dong Woo Lee
  • Patent number: 8412073
    Abstract: To enable not only releasing pressurization by a pressurization mechanism for pressurizing a belt thereby preventing a deformation therein but also easily and securely releasing the pressurization mechanism held in the pressure release state, thereby facilitating the installation operation of an apparatus. A pressurization mechanism for pressurizing a belt is in a released state prior to the use of the main body of the apparatus. Prior to the initial use of the main body, the pressurization of the pressurizing mechanism for the belt is exerted in linkage with a user operation of placing a recording material in a feed tray.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: April 2, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Yano, Yasuhiko Fuse, Hiroshi Kato
  • Patent number: 8406643
    Abstract: An image forming apparatus includes an image formation unit, a conveying unit and controller. The image formation unit includes a rotating photoreceptor, a latent image formation unit, a developing unit, a first transfer unit, and a second transfer unit. Regardless of forming or not forming on the photoreceptor a belt-shaped image which is not being transferred onto a recording medium, the controller controls the image forming unit such that formation of an image quality adjusting image that is not transferred to the recording medium starts from a predetermined position in a rotational direction of the photoreceptor, and such that the recorded image is formed further downstream in the rotational direction of the photoreceptor than an image quality adjusting image region.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: March 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hiroyuki Funayama, Naoki Hirako, Hideo Kimura, Keita Kumokiri, Mitsugu Kamio, Shun Kuwahara, Izumi Suda
  • Patent number: 8396405
    Abstract: According to aspects described herein, there is disclosed an apparatus and method for controlling a position of a belt in a printing system. The apparatus including a roller assembly for engaging at least a portion of the belt. The roller assembly extending laterally across the belt. The apparatus including a pair of laterally spaced support arms each rotatably supporting opposed ends of the roller assembly. Each support arm being pivotally coupled to the printing system for movement about a pivot axis extending substantially in the lateral direction. The apparatus also including a pair of actuating assemblies each configured to pivot a different one of the support arms about the pivot axis. The pivotal movement of each of the pair of support arms by the respective actuating assemblies being independent of the other.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: March 12, 2013
    Assignee: Xerox Corporation
    Inventor: Joseph M. Wing
  • Patent number: 8351831
    Abstract: An displacement correcting device is provided and includes: a rotation supporting member having a rotation shaft and rotating to support the endless belt-shaped member; a shaft supporting frame supporting a one-end supporting portion of the rotation shaft movably relative to an opposite-end supporting portion and supporting one end of the rotation shaft to be tilted about the other end; and a shaft displacing member having a rotation center disposed closer to one end portion in the axial direction than a rotation shaft supporting body and intersected by the axial direction and a rotation shaft contact portion contacting with the one end of the rotation shaft. The shaft displacing member allows the rotation shaft contact portion to rotate about the rotation center to tilt the rotation shaft when a movement sensing member detects the movement of the endless belt-shaped member to the one end of the rotation shaft.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: January 8, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Satoru Hori, Naohisa Fujita
  • Patent number: 8346140
    Abstract: A belt driving apparatus for rotationally driving a belt member, the belt driving apparatus includes a stretching member for stretching the belt member; a steering section including a steering member having a rotatable portion which is rotatable with rotation of the belt member, a frictional portion slidable relative to the belt member and provided at each of longitudinal outsides of the rotatable portion, and further including a supporting section supporting the steering member, and a rotation shaft rotatably supporting the supporting section, the steering section being effective to steer the belt member by inclining the steering member by a force produced by sliding between the frictional portion and the belt member; and a resisting force applying section for applying a resisting force against inclination of the steering member, the resisting force increasing with increase of a rate of change of an inclination angle of the steering member with respect to time.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Yasumoto
  • Patent number: 8340550
    Abstract: A transfer device includes: an endless transfer-belt that includes a first transfer-portion, at which a developer image is transferred onto an outer periphery surface of the transfer-belt, and a second transfer-portion, at which the developer image is transferred onto a member-to-be-transferred, the transfer-belt moving toward the second transfer-portion from the first transfer-portion; a transfer-member that, at the second transfer-portion, sandwiches the member-to-be-transferred between the transfer-member and the transfer-belt, and transfers the developer image to the member-to-be-transferred; a tension application unit that includes a resilient member, and a tension application member that urges the transfer-belt with resilient force of the resilient member and applies tension to the transfer-belt; and a damping member that causes damping force to act on the tension application member when the tension application member moves in one of a direction in which the tension application member urges the transfer
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: December 25, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takashi Hoshino, Chihiro Iijima