Blade Patents (Class 399/350)
  • Patent number: 11262670
    Abstract: An electrophotographic blade to be brought into contact with a contact member, comprises a plate spring, and a resin layer that covers at least a part of a surface of the plate spring to form a contact region that comes into contact with a contact member. In the state where one of ends of the plate spring is fixed, a length (L) from the fixed end to the another end is 5 mm to 20 mm, and a force needed to displace the another end by 1 mm is 5 N/m to 100 N/m. The resin layer satisfies the requirements: (1) the thickness of the resin layer is 0.05 mm to 2.00 mm, (2) the tan ? value of the resin layer in the range of 5° C. to 40° C. is 0.05 to 0.70, and (3) the elastic modulus of the resin layer is 1.0 to 60.0 MPa.
    Type: Grant
    Filed: April 2, 2021
    Date of Patent: March 1, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenichi Mochizuki, Ryosuke Takayama, Takahiro Miyazawa
  • Patent number: 11188020
    Abstract: There is provided a method of producing a blade for cleaning a toner image retainer, the method including: binding an abutting layer that abuts against the toner image retainer and a supporting layer that supports the abutting layer, wherein the maximum value D of a difference between a first loss tangent at 1 Hz and a second loss tangent at 100 Hz of the blade that includes the abutting layer and the supporting layer satisfies the formula: 0.2?D?0.7, wherein the maximum value D is a maximum value of a difference between the first loss tangent and the second loss tangent at temperatures within a range of 0° C. to 50° C.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: November 30, 2021
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kunihiro Ogura, Yukio Hosoya, Taiki Amemiya, Teruo Sasaki
  • Patent number: 11173519
    Abstract: The present application discloses a method for making a rubber blade. The method includes applying a first coating composition and a second coating composition in separate steps on at least a part of a surface of a polyurethane elastic substrate; and solidifying the first coating composition and the second coating composition by ultraviolet light irradiating to form a hardened layer on the surface of the polyurethane elastic substrate. The first coating composition includes an isocyanate-group-terminated polyisocyanate and a first solvent. The second coating composition includes a first monomer, a photoinitiator, and a second solvent. The first monomer is at least one of an acrylate monomer and a methacrylate monomer each having an reactive hydroxyl group. The isocyanate group of the polyisocyanate is reacted with the reactive hydroxyl group of the first monomer to generate a urethane group to form a polyurethane acrylate. The present application also discloses a rubber blade.
    Type: Grant
    Filed: August 24, 2019
    Date of Patent: November 16, 2021
    Assignee: SHENZHEN FANCY CREATION INDUSTRIAL LIMITED
    Inventors: Hua Zhu, Hua Yang, Feng Hua, Hongnan Li, Naoyuki Ohmori
  • Patent number: 11089185
    Abstract: A cleaning apparatus for cleaning a detection device having a detection surface includes a cleaning unit provided with a cleaning member for performing a cleaning and configured to perform a wipe-off cleaning in a state where the cleaning member is in contact with the detection surface, a drive unit configured to press the cleaning member onto the detection surface, a detection unit configured to detect a force with which the cleaning member presses the detection surface, and a control unit configured to, while controlling the drive unit based on a result of the force detection by the detection unit to control the force, drive the cleaning unit to perform the wipe-off cleaning.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: August 10, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akihiko Sakamaki
  • Patent number: 11048202
    Abstract: A sheet conveyance apparatus includes a conveyance portion including a rotary member, and a counter member, a first contact member, a second contact member, and a contacting and separating mechanism. The contacting and separating mechanism causes the second contact member to separate from the surface of a rotary member of a conveyance portion when the rotary member rotates in the first direction, and causes the second contact member to abut against the surface of the rotary member when the rotary member rotates in a second direction opposite to the first direction.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: June 29, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Naoki Hayashi
  • Patent number: 10942468
    Abstract: An optical scanning device (30) includes a first elastic member (51) fixed to a bottom wall of a casing (31) and compressed by a lower surface of an image forming lens (36) and the bottom wall to close a gap between the lower surface of the image forming lens (36) and the bottom wall, and a second elastic member (52) fixed to a lid member (37) and compressed by an upper surface of the image forming lens (36) and the lid member (37) to close a gap between the upper surface of the image forming lens (36) and the lid member (37).
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: March 9, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Hiroyuki Tomioka
  • Patent number: 10942482
    Abstract: A method for manufacturing a blade for electrophotographic devices and a blade for electrophotographic devices are provided. The method includes: an impregnation step of impregnating, from the surface of at least a part of a blade-shaped substrate containing urethane rubber, with a blocked isocyanate in which an isocyanate group is blocked with a blocking agent, wherein the part includes a portion that comes into contact with a mating member; and a curing step of dissociating the blocking agent from the blocked isocyanate impregnated into the substrate in the impregnation step, and then curing the released isocyanate in the substrate to form a cured portion in at least the part of the substrate including the portion that comes into contact with the mating member. In the method, the isocyanate released from the blocked isocyanate includes an aromatic isocyanate.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: March 9, 2021
    Assignee: Sumitomo Riko Company Limited
    Inventors: Shimpei Miyagawa, Yoshihiro Saito
  • Patent number: 10871741
    Abstract: A cleaning device that cleans a surface of an image holding unit capable of holding an image formed using an image forming material includes: a cleaning tool that is movable along an intersecting direction intersecting with a moving direction of the image holding unit and cleans the surface of the image holding unit when placed in a contact position where the cleaning tool is in contact with the surface of the image holding unit; and a guiding unit that guides the cleaning tool so that the cleaning tool moves from a non-contact position where the cleaning tool is not in contact with the image holding unit to the contact position for cleaning the surface of the image holding unit, wherein when the image holding unit is moved, the cleaning tool placed in the contact position cleans the surface of the image holding unit.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: December 22, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Keiichiro Sato
  • Patent number: 10859963
    Abstract: An image forming apparatus including an image bearer and a cleaning blade is provided. The cleaning blade comprises an elastic member configured to contact a surface of the image bearer to remove toner particles remaining thereon. The elastic member comprises a substrate and a surface layer comprising a cured product of a curable composition and a siloxane compound. The surface layer is disposed on at least a part of a lower surface of the substrate. The surface layer has a hardness gradient in which a Martens hardness HM measured using a nanoindenter decreases from a surface of the surface layer toward the lower surface of the substrate in a thickness direction, and the Martens hardness HM measured in a region extending from a vicinity of the surface (with a load of 1 ?N) to a deepest part in the thickness direction (with a load of 1,000 ?N) ranges from 2.5 to 32.5 N/mm2. The toner has a tensile breaking force F of from 200 to 450 gf (from 1.96 to 4.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: December 8, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Nakayama, Keiichiro Juri, Yuka Aoyama, Hiroshi Yamada
  • Patent number: 10852686
    Abstract: A cleaning device has: a cleaning frame; a cleaning member which, after transfer through contact with an image bearing member, removes a developer remaining on the image bearing member; and a sheet member having flexibility and coming into contact with the image bearing member at an upstream side of a contact position between the cleaning member and the image bearing member in the rotation direction of the image bearing member. An external additive is an inorganic salt having a charging polarity on the positive side with respect to the developer, and work functions ?(S), ?(A), ?(T) of the sheet member, the external additive and the developer satisfy 0?|?(A)??(S)|<0.57; and ?(A)<?(T).
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: December 1, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takayuki Kanazawa, Shuhei Tokiwa
  • Patent number: 10838322
    Abstract: A toner conveying device includes a case, a conveying screw, a film member and a supporting member. The conveying screw conveys a toner stored in the case in a predetermined direction inside the case. The film member includes a base part elongated in an axial direction of the conveying screw as a longitudinal direction and a plurality of protruding pieces formed so as to protrude in one direction intersecting the longitudinal direction from the base part, and has flexibility. The supporting member includes an attaching part elongated in the axial direction as the longitudinal direction to which the film member is attached, and an axis part being in parallel to the longitudinal direction. The film member and the supporting member are disposed at an upper side of the conveying screw so that the protruding pieces come into contact with the conveying screw, and are rotatable around the axis part.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: November 17, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Hirofumi Tsuji, Masahiro Ueno
  • Patent number: 10809658
    Abstract: A cleaning blade includes an elastic material, a first surface, a second surface and an end surface. The end surface includes a first region and a second region provided on opposite sides of the first region. The elastic material of the cleaning blade has indentation elastic modulus E0 [MPa] of 3 or more and 20 or less, and indentation elastic modulus E1 [MPa] of the end surface in the first region is (E0+1) or more and 40 or less. Dynamic hardness DH1 [mN/?m2] of the first region is 0.10 or more and 0.20 or less, dynamic hardness DH2 [mN/?m2] of the second region is 0.15 or more and 0.50 or less, and a difference (DH2?DH1) is 0.05 [mN/?m2] or more. A difference in thickness between the end surface in the first region and the end surface in the second region is 25 ?m or less.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: October 20, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shingo Hirota
  • Patent number: 10705477
    Abstract: A cleaning blade includes a contact part coming into contact with a member to be cleaned, the contact part being configurated by a member containing polyurethane rubber produced by polymerizing at least a polyol component, which contains over 50 mol % and 75 mol % or less of 1,4-butanediol relative to the entire polyol components, with a polyisocyanate component. The ratio (M100/Re) of 100% modulus (M100 [MPa]) to rebound resilience coefficient (Re [%]) is 0.25 or more. The rebound resilience coefficient (Re [%]) is 25% or more.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: July 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Daisuke Tano, Tomoo Matsushima, Yosuke Tsutsumi
  • Patent number: 10684585
    Abstract: The disclosure provides a cleaning blade having a blade portion. The blade portion has a blade tip equipped with an edge constituted by a ridge line between the tip surface the blade portion and a blade surface arranged near a photosensitive drum. The blade portion satisfies the following expressions: a?50 ?m, and 0.1?b/a?0.6 where, when the blade portion is viewed along blade longitudinal direction with the edge in sliding contact with the photosensitive drum for measurement rotating in one direction, a represents a maximum amplitude of the edge which vibrates with the rotation of the photosensitive drum for measurement, and b represents a maximum amplitude when a position separated from the edge by 200 ?m on the blade surface of the blade tip vibrates with the oscillation of the edge.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: June 16, 2020
    Assignee: Sumitomo Riko Company Limited
    Inventors: Shimpei Miyagawa, Toshihiko Arata
  • Patent number: 10585366
    Abstract: Provided is an image forming apparatus including an image bearer capable of bearing a toner image, where a latent image is formed on the image bearer, a developing unit configured to develop the latent image formed on the image bearer with a toner, and a cleaning unit including a blade-shaped elastic body, where the elastic body is brought into contact with a surface of the image bearer, wherein a friction coefficient Ft/Fn between the image bearer and the elastic body is 0.85 or greater but 1.1 or less, and self-excited vibration WRFt(LMH) of shear force of the elastic body in a LMH band is 1.5 gf or greater but 3.5 gf or less.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: March 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Hiroki Orii, Ryohta Takahashi
  • Patent number: 10571851
    Abstract: A cleaning unit includes a case, a blade, a swing member, a first coil spring, a second coil spring, and a plurality of first engaging portions. The first coil spring is provided on a first end side of the blade in the longitudinal direction and configured to pull the swing member. The second coil spring is provided on a second end side of the blade in the longitudinal direction and configured to pull the swing member. The plurality of first engaging portions are provided on one of the case or the swing member at the first end side of the blade and configured to selectively engage a one end side of the first coil spring at different positions with respect to the longitudinal direction of the blade so that a contact pressure of the blade against the image bearing member caused by the first coil spring is changed.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: February 25, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shotaro Ishihara
  • Patent number: 10534310
    Abstract: The present disclosure provides a cleaning blade capable of improving chipping resistance. A cleaning blade includes a blade part made of polyurethane and having an edge that comes in slidable contact with a mating part. The edge includes: a base material containing polyurethane; an impregnated layer containing polyurethane in the base material and a cured acrylic product and present from the surface through to the inside of the base material; and a particle layer containing particles supported by the surface of the base material. The average particle diameter of the particles is between 3 nm and 100 nm, inclusive. The thickness of the impregnated layer is 30 nm or greater and less than 1000 nm. The edge has an area ratio of the particle layer to the impregnated layer that is between 5% and 30%, inclusive in a cross section perpendicular to the surface of the base material.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: January 14, 2020
    Assignee: Sumitomo Riko Company Limited
    Inventors: Manabu Sakuda, Satoshi Endo, Kazushi Yamaguchi
  • Patent number: 10520874
    Abstract: A cleaning blade that removes a foreign matter adhering to a rotational body includes: an abutment member; a supporting member that supports the abutment member; and a holding member that holds the supporting member, wherein the abutment member includes: an abutment layer abutting on the rotational body; and an adjustment layer that is a part other than the abutment layer, and an elongation percentage of the adjustment layer is larger than an elongation percentage of the abutment layer in a case where frictional force is applied from the rotational body to the abutment member during rotation of the rotational body.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: December 31, 2019
    Assignee: Konica Minolta, Inc.
    Inventor: Noritoshi Hagimoto
  • Patent number: 10514651
    Abstract: A cleaning blade includes an edge portion made of an elastic material having a rebound resilience value R35 at 35° C. and a 100% modulus value M35 at 35° C. that satisfy the relation R35??4.8 M35+42.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: December 24, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuhiko Watanabe, Hiroshi Nakai, Hiroshi Mizusawa, Tomoyuki Kirigane, Yasuhide Nakazawa
  • Patent number: 10503113
    Abstract: An image forming apparatus includes an image bearing member, a charging member, an exposing device, a developing device, a transfer member, and a rubbing member. The image bearing member includes a plurality of recess portions on a surface thereof. The rubbing member is configured to come into contact with the image bearing member to form a rubbing nip portion between the rubbing member and the image bearing member. The recess portions each have an opening portion whose maximum length in the rotational direction is 20 ?m to 120 ?m. When a linear speed of the image bearing member in the rubbing nip portion is S1 and a linear speed of the rubbing member in the same direction as the linear speed of the image bearing member in the rubbing nip portion is S2, a relationship of a linear speed ratio of S2/S1<1.0 is satisfied.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: December 10, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroyuki Kidaka
  • Patent number: 10481526
    Abstract: An image-forming apparatus includes an electrophotographic photosensitive member including a conductive base and a single-layer photosensitive layer disposed on the conductive base, the single-layer photosensitive layer including a binder resin, a charge-generating material, a hole-transporting material, and an electron-transporting material; and a developing unit including a developing roller that develops an electrostatic latent image formed on a surface of the electrophotographic photosensitive member with a developer including a toner in order to form a toner image, the developing roller being arranged to come into contact with the photosensitive layer. The ratio R/P of the content R [mass %] of the binder resin in the photosensitive layer to the pressing force P [N/mm] at which the developing roller is pressed against the photosensitive layer is about 11.5 or more and about 19.6 or less.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: November 19, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yoshiteru Yamada
  • Patent number: 10394180
    Abstract: A cleaning blade 1 includes an elastic body 11 that is a molded body of a rubber base material, and which has at least a surface treatment layer 12 in a portion of the elastic body 11, the portion coming into contact with an object to be contacted. The surface treatment layer 12 is formed by impregnating a surface portion of the elastic body 11 with a surface treatment liquid, which contains an isocyanate compound and an organic solvent, and curing the surface treatment liquid; the surface treatment layer 12 has an elastic modulus of 95 MPa or less; the elastic body 11 has an elastic modulus of from 20 MPa to 60 MPa (inclusive); and the difference between the elastic modulus of the surface treatment layer 12 and the elastic modulus of the elastic body 11 is 1 MPa or more.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: August 27, 2019
    Assignees: NOK CORPORATION, SYNZTEC CO., LTD.
    Inventors: Syo Kawabata, Kenji Sasaki, Yasushi Sugiyama, Hiroaki Kaneda, Natsumi Kimura, Katsuya Shimotsuma, Koji Nishiguchi, Shuji Abe, Hidetomo Mukai
  • Patent number: 10345743
    Abstract: An image forming apparatus includes an image bearing member configured to carry a toner image; a cleaning member contacted to the image bearing member to clean a surface of the image bearing member by movement of the surface of the image bearing member: a supporting member configured to support the cleaning member; a case provided with a space configured to hold the supporting member therein; a viscoelasticity member; and a vibration controlling member configured to suppress vibration of the cleaning member, wherein the vibration controlling member is mounted on an outer surface of the case by the viscoelasticity member.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: July 9, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuki Takase, Joji Goto, Yoshimi Suzuki
  • Patent number: 10295950
    Abstract: A cleaning device includes a cleaning member, a container, a feeding screw including a blade for feeding toner inside the container toward an outside of the container, and a loosening member, stretching along a rotation axis direction of the feeding screw, for loosening toner on a container wall surface provided around the feeding screw by being swung about a rotational axis along the rotation axis direction in a direction crossing the rotation axis direction, and the loosening member includes a contact portion for rotating the loosening member in a first direction with rotation of the feeding screw in contact with the blade when the feeding screw is in a predetermined phase range and includes an urging portion for imparting, to the loosening member, a force for rotating the loosening member in a second direction opposite to the first direction.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 21, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Iwakawa, Masato Yuasa, Keita Shigihara
  • Patent number: 10295949
    Abstract: A cleaning blade has a contact portion contacting a surface of an image bearing body. The contact portion removes a developer remaining on the surface of the image bearing body when the image bearing body rotates. Using coefficients ? and ? and a temperature T, a loss elastic modulus E? of the cleaning blade is represented by: E?=?×e?T; 1.36×103???2.24×109; ?0.12????0.005; and 0° C.?T?100° C.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: May 21, 2019
    Assignee: Oki Data Corporation
    Inventor: Ken Kato
  • Patent number: 10289057
    Abstract: An image forming apparatus (1) includes a photosensitive drum (50), a cleaning blade (81), and a drive mechanism (90). The cleaning blade (81) is in pressed contact with a circumferential surface of the photosensitive drum (50). The drive mechanism (90) causes one of the photosensitive drum (50) and the cleaning blade (81) to reciprocate in a rotational axis direction (D) of the photosensitive drum (50). The drive mechanism (90) for example causes the photosensitive drum (50) to reciprocate in the rotational axis direction (D). The photosensitive drum (50) includes a photosensitive layer (85). An outermost layer of the photosensitive layer (85) contains a plurality of particles.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: May 14, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshitaka Imanaka, Hiroaki Watanabe, Masahito Ishino
  • Patent number: 10191439
    Abstract: A cleaning blade includes a support and an elastic member with a flat shape. The elastic member has a secured end secured to the support and a free end. A ridgeline of the free end contacts a cleaning target to remove substances adhering to a surface of the cleaning target. The elastic member includes a base and a surface layer made of a cured product of a curable composition. The surface layer is disposed on at least a part of an opposite face disposed to oppose a downstream side of the cleaning target downstream from a contact portion of the elastic member with the cleaning target in a direction of movement of the cleaning target. A thickness of the surface layer progressively decreases toward the secured end along a cross section perpendicular to a longitudinal direction of the surface layer.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 29, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiro Juri, Masanobu Gondoh, Yohta Sakon, Masahiro Ohmori, Yuuki Mizutani, Yuka Aoyama
  • Patent number: 10185276
    Abstract: An image forming apparatus includes an electrophotographic photoreceptor, a charging device, an electrostatic latent image forming device, a developing device, a transfer device, and a cleaning device, and further includes an intercepting device that includes an intercepting member separated from the electrophotographic photoreceptor by a gap so that a distance from the surface of the electrophotographic photoreceptor to the intercepting member is about 0.3 to 0.9 (inclusive) times a volume-average particle size of toner particles. The intercepting member is used to intercept residual toner particles at a position downstream of the transfer device and upstream of the cleaning device in a rotation direction of the electrophotographic photoreceptor, the residual toner particles remaining on the surface of the electrophotographic photoreceptor.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 22, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masaki Hirakata, Takashi Imai
  • Patent number: 10146169
    Abstract: A cleaning blade including an elastic member configured to be in contact with a surface of a cleaning-target member to remove deposited matter deposited on the surface of the cleaning-target in member, wherein the elastic member includes a base and a surface layer formed of a cured product of a curable composition, the surface layer is formed on at least part of a bottom surface of the base including a contact part to be in contact with the cleaning-target member, where the bottom surface of the base is a surface of the base facing a downstream side along a traveling direction of the cleaning-target member relative to the contact part, and an average film thickness of the surface layer at the contact part is 10 ?m or greater but 100 ?m or less.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: December 4, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuka Aoyama, Keiichiro Juri, Masanobu Gondoh, Yohta Sakon, Masahiro Ohmori, Yuuki Mizutani
  • Patent number: 10139771
    Abstract: An image forming apparatus includes an intermediate transfer member bearing a toner image and image forming units arranged side by side, with each image forming unit having a developing device forming the toner image, a magnetic permeability sensor detecting a toner density of a developer in the developing device, and a cleaning unit having a cleaning member which removes toner remaining on an image bearing member and a conductive support member which supports the cleaning member. The apparatus further includes a conductive member facing the magnetic permeability sensor of the most upstream image forming unit and arranged upstream of that image forming unit. The developing device of one of adjacent image forming units is opposed to the cleaning unit of another unit which is arranged downstream and is next to the developing device of the one of the adjacent image forming units.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: November 27, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshihisa Yago
  • Patent number: 10108132
    Abstract: An image forming apparatus which transfers a toner image formed on an image carrier onto a transfer object and forms an image, the apparatus including: a cleaner which has a rigid blade made of metal that contacts the image carrier after transferring of the toner image onto the transfer object and cleans a residue attached to a surface of the image carrier, wherein the image carrier has a base layer and an elastic layer, and a surface hardness of the elastic layer measured by a nanoindentation method is 70 MPa or more and 150 MPa or less, and a thickness of the rigid blade is 100 ?m or more and 300 ?m or less.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: October 23, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Takashi Kawanago
  • Patent number: 10088795
    Abstract: There is provided a cleaning blade including an elastic member and a supporting member, in which a free end of the elastic member has an edge and a hardened surface constituting the edge. The cleaning blade satisfies a relationship of 0.10?DHs?0.40 and DHs?DHm where DHs (mN/?m2) represents a dynamic hardness of the hardened surface and DHm (mN/?m2) represents a maximum value of a dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisect an angle of the edge satisfies 0 ?m<L?200 ?m and in AFM-IR spectrum of the hardened surface, peak intensity ? C?O free (1724 to 1736 cm?1) derived from a urethane group and peak intensity ? C?O bond (1708 to 1720 cm?1) derived from a urethane group hydrogen bond has a specific relationship.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: October 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yohei Ikeda, Arihiro Yamamoto, Tomoya Kawakami
  • Patent number: 10082750
    Abstract: A cleaning device detachable from an image forming apparatus, the cleaning device including a frame that includes a waste toner containing unit that contains toner removed with a cleaning member, a vent hole that communicates an inside and an outside of the waste toner containing unit and that is covered with a filter, and a partitioning portion that protrudes inside the waste toner containing unit. In a state in which the cleaning device in mounted in the image forming apparatus, there is a contact position where the image bearing member and the cleaning member come in contact with each other, and the partitioning portion is positioned between the vent hole and the contact position in a vertical direction.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: September 25, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichi Fukui, Shinjiro Toba
  • Patent number: 10042316
    Abstract: The present disclosure provides a cleaning blade configured to be in contact with a cleaning target member and clean a surface of the cleaning target member. The cleaning blade has a contact surface configured to be in contact with the cleaning target member, and is formed such that (i) Young's modulus of the cleaning blade reaches a peak value at a peak position inside of the contact surface in a thickness direction of the cleaning blade, and (ii) a relationship of Ym>Yc>Yb holds, where Yc is a value of Young's modulus at the contact surface, Ym is the peak value of Young's modulus at the peak position, and Yb is a value of Young's modulus at a position separated from the contact surface more than the peak position in the thickness direction.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: August 7, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Yoshitoku
  • Patent number: 10042315
    Abstract: An elastic blade includes a contact edge to contact a contact object, an edge region including the contact edge and having a thickness smaller than or equal to 0.50 mm, and a backup region different in material or property from the edge region. The backup region is adjacent to the edge region on a cross section perpendicular to a direction in which the contact edge extends. The elastic blade has a converted Martens hardness X (N/mm2) in a range of from 0.9 to 2.9. The converted Martens hardness is defined as: X = S A S A + S B × h A + S B S A + S B × h B where SA represents a cross-sectional area (mm2) of the edge region, SB represents a cross-sectional area (mm2) of the backup region, hA represents a Martens hardness (N/mm2) of the edge region, hB represents a Martens hardness (N/mm2) of the backup region, and t represents the thickness (mm) of the edge region including the contact edge.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: August 7, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Eisuke Shimizu, Kazuhiko Watanabe, Takaaki Tawada, Yuu Sakakibara
  • Patent number: 10030167
    Abstract: A method for producing a blade member 1 includes an impregnation step of impregnating at least a portion of a surface of a blade portion 11 made of a polyurethane rubber with a surface treatment liquid that includes a salt of diazabicycloundecene and a carbodiimide-modified polyvalent isocyanate compound including a carbodiimide-modified polyvalent isocyanate dimer and a carbodiimide-modified polyvalent isocyanate trimer or higher multimer, in which a content of the trimer or higher multimer is 50% by mass or less, and a cured layer formation step of heating and curing the carbodiimide-modified polyvalent isocyanate compound which is impregnated into the blade portion 11, to form a cured layer 110.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: July 24, 2018
    Assignee: SUMITOMO RIKO COMPANY LIMITED
    Inventors: Yasunori Nimura, Satoshi Suzuki, Shimpei Miyagawa
  • Patent number: 10018956
    Abstract: A cleaning blade has an elastic body formed of a urethane elastomer, and a treated surface layer formed at least at a portion which comes into contact with a contact target of the elastic body. The treated surface layer is formed through impregnating a surface portion of the elastic body with a surface treatment liquid containing a bifunctional isocyanate compound, at least one polyol, and an organic solvent; or a surface treatment liquid containing an isocyanate group-containing compound having an isocyanate group at an end thereof, which compound is a reaction product of the bifunctional isocyanate compound with the at least one polyol, and an organic solvent, and curing the surface treatment liquid. The difference between the nitrogen concentration at the surface and the nitrogen concentration in the elastic body at a depth of 0.5 mm from the surface of the treated surface layer is 0.02 to 0.15 mass %.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: July 10, 2018
    Assignees: NOK CORPORATION, SYNZTEC CO., LTD.
    Inventors: Syo Kawabata, Kenji Sasaki, Katsumi Abe, Natsumi Kimura
  • Patent number: 10018941
    Abstract: A cleaning device includes a cleaning blade disposed in contact with a rotator, a toner collecting section disposed along the rotator and the cleaning blade and includes a groove extending in an axial direction of the rotator, a conveyor disposed in the groove, and an agitator disposed on a side of a rim of the groove. The conveyor rotates to convey the toner in a longitudinal direction of the groove. The agitator vibrates through contact with the conveyor and includes comb-tooth portions lined in a comb shape in the longitudinal direction of the groove, and bent portions, each of which is bent from an end of one of the comb-tooth portions. The comb-tooth portions contact a circumference of the conveyor to vibrate. The bent portions are lined at intervals smaller than intervals on a base side of the comb-tooth portions.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: July 10, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Tomita, Takeshi Shintani, Hiroshi Mizusawa, Yasuhiro Maehata, Yasuhito Kuboshima, Yuta Azeyanagi
  • Patent number: 9996047
    Abstract: Provided is a cleaning blade including: an elastic member; and a supporting member supporting the elastic member. The elastic member includes a free end portion, and the free end portion has an edge and a first surface and a second surface that form the edge. At least one of the first surface and the second surface has a hardened surface. The following expression (1): 0.1?DHs?0.4 and the following expression (2): DHs<DHm are satisfied, where DHs (mN/?m2) represents a dynamic hardness of the hardened surface, and DHm (mN/?m2) represents a maximum value of the dynamic hardness obtained in a positional range in which a distance L from the edge on a straight line that bisects an angle of the edge in a cross-section of the elastic member orthogonal to a longitudinal direction thereof satisfies 0 ?m<L?100 ?m.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: June 12, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomoya Kawakami, Arihiro Yamamoto, Masaaki Kimura
  • Patent number: 9955037
    Abstract: An image forming system includes: an image forming apparatus including an image forming unit for forming an image on a sheet, an image reading unit for reading a sheet surface and generating a scan image, an image inspection unit for detecting abnormalities within the scan image, and a history generating unit for generating detection information of each of the abnormalities and generating a history image by embedding the detection information in the scan image; a storage device for storing the history image; and a user terminal for displaying an abnormality detection result and inputting a user's evaluation of the abnormality detection result, wherein the image forming apparatus further includes a parameter setting unit for finally determining the abnormalities depending on the user's evaluation, and determining and setting abnormality detection parameters such that the abnormalities finally determined are detected, and the abnormalities not finally determined are not detected.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 24, 2018
    Assignee: Konica Minolta, Inc.
    Inventor: Makoto Oki
  • Patent number: 9946218
    Abstract: Provided is a cleaning blade disposed to be in contact with an image carrying belt having an elastic layer for removing foreign material from a surface of the image carrying belt, including: a base; and an amorphous coating layer on the base, the coating layer including a contact portion disposed to be in contact with the image carrying belt, wherein the contact portion is curved to have a predetermined curvature with respect to a direction of a movement of the image carrying belt.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: April 17, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventor: Taichi Meguro
  • Patent number: 9915910
    Abstract: A cleaning device includes a cleaning member configured to move in the opposite direction from a moving direction of an image carrier and come into contact with a surface of the image carrier to remove residual matter from the surface of the image carrier, wherein the cleaning member includes a supporting member formed with a metallic plate spring and a contact member formed with an elastic material and bonded to an end of the supporting member, an edge portion at an end of the contact member being brought into contact with the surface of the image carrier, the end of the contact member protrudes from the end of the supporting member, and the end of the supporting member is located on an upstream side of a normal line of the image carrier at the contact position of the edge portion in the moving direction of the image carrier.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: March 13, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Noritoshi Hagimoto, Eri Yoshida
  • Patent number: 9904233
    Abstract: An elastic blade includes a contact edge to contact a contact object, an edge region including the contact edge, and a backup region different in at least one of material and physical property from the edge region and adjacent to the edge region on a cross section perpendicular to a direction in which the contact edge extends. The backup region is free of direct contact with the contact object. In the elastic blade, a converted elastic power X is from 57% to 90% and defined as X = S A S A + S B × e A + S B S A + S B × e B where SA and SB represent cross-sectional areas of the edge region and the backup region on the cross section, and eA and eB represent elastic powers of the edge region and the backup region.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: February 27, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Eisuke Shimizu, Kazuhiko Watanabe, Takaaki Tawada, Yuu Sakakibara
  • Patent number: 9904235
    Abstract: A cleaning device includes a toner storing container that stores a collected toner, a conveyance screw that conveys toner in the toner storing container, and a toner crushing member that crushes the toner accumulated in the toner storing container. The toner crushing member is formed so as to include: a supporting portion being attached above a rotation axis of the conveyance screw; and a plurality of elastic pieces each extending from the supporting portion toward the conveyance screw and being swung by a fin that rotates in association with the rotation of the conveyance screw. Each of the elastic pieces is formed with a raised portion rising toward the seal member, so that the elastic pieces come in contact with the seal member.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: February 27, 2018
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Koichi Imanaka, Takashi Morita
  • Patent number: 9880510
    Abstract: Provided is a cleaning blade including an elastic member, wherein a spin-spin relaxation time (T2) of the elastic member obtained by a solid echo method in a pulse NMR analysis is longer than or equal to 0.60 msec but shorter than or equal to 1.0 msec, and wherein the elastic member has a contact part to contact a surface of a cleaning target member, and the contact part contains a cured product of a curable composition.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: January 30, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kaori Toyama, Masanobu Gondoh, Yohta Sakon, Shohei Gohda, Yuka Aoyama, Yuta Nakamura
  • Patent number: 9874847
    Abstract: A cleaning unit includes a cleaning member that removes a developer from a surface of an image holding member; an accommodating portion that accommodates the removed developer; and a transport member that transports the developer removed by the cleaning member to the accommodating portion, wherein the transport member includes a transport unit that extends in a direction intersecting with a developer transport direction, has a surface formed to be inclined in a direction approaching the cleaning member towards an upstream side, and transports the developer while contacting with the developer.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: January 23, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Mikio Yamaguchi, Hiroyuki Mamiya, Yosuke Ninomiya
  • Patent number: 9829851
    Abstract: A cleaning device of the disclosure includes a housing, a cleaning member, a cleaning blade, a seal member, a discharge screw, and a first film member as well as a second film member. In the housing, a waste toner containing part is formed. The discharge screw is placed in the waste toner containing part. The first film member and the second film member are reciprocatively moved in a radial direction of the rotating shaft. The first film member is so positioned as to be inclined constantly downward as it becomes farther and farther from the seal member. A second end portion of the second film member is placed between the discharge screw and the seal member.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: November 28, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Tomohisa Okura
  • Patent number: 9817358
    Abstract: A cleaning blade (1) having an elastic body (11) molded from a rubber base material, and having at least a surface treatment layer (12) on the area of the elastic body (11) that is brought into contact with a body to be contacted, wherein the surface treatment layer (12) is formed by impregnating the surface layer portion of the elastic body (11) with a surface treatment liquid containing an isocyanate compound and an organic solvent and hardening the liquid. The elasticity modulus of the surface treatment layer (12) is 40 MPa or less, the elasticity modulus of the elastic body (11) is 3-20 MPa, and the difference between the elasticity modulus of the surface treatment layer (12) and the elasticity modulus of the elastic body (11) is 1 MPa or more.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: November 14, 2017
    Assignees: NOK CORPORATION, SYNZTEC CO., LTD.
    Inventors: Miyuki Abe, Kenji Sasaki, Syo Kawabata, Katsumi Abe, Natsumi Kimura
  • Patent number: 9798284
    Abstract: A multilayered blade made of an elastic material includes an edge layer, having a contact edge to contact an object, and at least one backup layer laminated on the edge layer. The blade has a converted loss tangent tan ? of 0.23 or greater and 0.51 or smaller in a temperature range of from 0° C. to 50° C. The converted loss tangent tan ? is defined as: X = A A + B × L 1 + B A + B × L 2 , where X represents the converted loss tangent tan ?, A represents a thickness in millimeters of the edge layer, B represents a thickness in millimeters of the at least one backup layer, L1 represents a variation of a loss tangent tan ? of the edge layer in the temperature range of from 0° C. to 50° C., and L2 represents a variation of a loss tangent tan ? of the at least one backup layer in the temperature range of from 0° C. to 50° C.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: October 24, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Eisuke Shimizu, Kazuhiko Watanabe, Takaaki Tawada, Yuu Sakakibara
  • Patent number: 9746817
    Abstract: Provided is a cleaning blade including an elastic member configured to abut on a surface of a cleaning target member and remove residual material deposited thereon, wherein elastic member satisfies requirements a to c below, a. an abutment part of the elastic member to abut on the surface of the cleaning target member has a reformed layer, b. Martens hardness at a surface of the reformed layer is from 1.5 to 15 N/mm2, and c. a relationship H/L between maximum Martens hardness H among Martens hardnesses H in a region inward from the abutment part thicknesswise and distance L from the surface of the reformed layer is from 0.010 to 0.2 (N/mm2·1/?m), where distance L represents minimum distance among distances to the surface of the reformed layer, from positions at which a measured Martens hardness and a measured elastic power are equal to those of the elastic member.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: August 29, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shohei Gohda, Shinji Nohsho, Masanobu Gondoh, Kaori Toyama, Yohta Sakon, Masahiro Ohmori