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公开(公告)号：US11460805B2
公开(公告)日：2022-10-04
申请号：US17423079
申请日：2019-12-11
发明人： Shota Onishi
摘要： An image forming apparatus includes a fixing device, a discharge roller pair, a cooling fan, a detection portion, and a cooling fan control unit. The discharge roller pair discharges a sheet on which a toner image has been fixed in the fixing device to a discharge tray via a discharge port. The cooling fan cools the sheet discharged on the discharge tray by blowing air thereto. The detection portion detects a rear end of the sheet being conveyed from the fixing device toward the discharge port. The cooling fan control unit performs control so that, within a prescribed period from a point in time of detection of the rear end of the sheet by the detection portion to when the rear end passes through the discharge roller pair, a rotation speed of the cooling fan is reduced to be lower than a reference speed used to cool the sheet.
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公开(公告)号：US20220308519A1
公开(公告)日：2022-09-29
申请号：US17694430
申请日：2022-03-14
发明人： Ai TAKAGAMI , Yosuke SAITO , Nobuyuki HAYASHI , Masaki KADOTA
IPC分类号： G03G21/00
摘要： A cleaning device includes a housing, a cleaning blade, a toner conveyance path, a conveyance screw, and a first flicker. The conveyance screw includes a rotary shaft and a helical vane. The first flicker includes a first base portion and a plurality of first contact pieces and uses the first contact pieces to press the conveyance screw in a first direction away from a bottom part of the toner conveyance path. The first base portion includes a secured portion and a blade opposed portion. The first contact pieces are connected to an upper end part of the blade opposed portion. An elastic member is disposed between the cleaning blade and the blade opposed portion.
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公开(公告)号：US11429059B2
公开(公告)日：2022-08-30
申请号：US17381503
申请日：2021-07-21
发明人： Shougo Sato , Hideshi Nishiyama
摘要： A drum cleaner in a drum unit removes toner from a photosensitive drum. A waste-toner conveyance pipe has a waste-toner discharge port and conveys toner removed from the photosensitive drum by the drum cleaner. A toner accommodation chamber accommodates toner to be supplied to a developing roller. A waste-toner accommodation chamber accommodates toner removed from the photosensitive drum. A toner cartridge rotatably moves relative to the drum unit between: a first position at which a waste-toner receiving port is separated from the waste-toner discharge port in a state where the toner cartridge is mounted on the drum unit; and a second position at which an internal space of the waste-toner accommodation chamber is in communication with an internal space of the waste-toner conveyance pipe through the waste-toner discharge port and the waste-toner receiving port in a state where the toner cartridge is mounted on the drum unit.
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74.发明授权公开(公告)号：US11409225B2
公开(公告)日：2022-08-09
申请号：US17126362
申请日：2020-12-18
摘要： An image forming apparatus includes an apparatus body including a control board, a draw-out unit including a photosensitive drum configured to bear a toner image and rotate about a rotation axis, a developing unit, and a unit contact, the developing unit including a developing roller and a memory, and a door configured to face the draw-out unit at a closed position. The door includes a door contact electrically connected to the control board. The draw-out unit includes a facing surface configured to face the door positioned at the closed position, and a grip portion provided at a center portion of the facing surface in an axial direction of the rotation axis. The unit contact is provided in a region outside an end surface of the grip portion in the axial direction and below the grip portion in a vertical direction.
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公开(公告)号：US20220229391A1
公开(公告)日：2022-07-21
申请号：US17614549
申请日：2019-05-31
发明人： Ken HIROTOMI
摘要： The present invention addresses the issue of providing a cleaning blade having excellent durability. An elastic body for blades is provided that has an abutting section that comprises a heat-curable polyurethane urea that is a reaction product of at least a polyol, a polyisocyanate, and a curing agent including a diaminobenzoic acid ester indicated by general formula (1).
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公开(公告)号：US20220221817A1
公开(公告)日：2022-07-14
申请号：US17646930
申请日：2022-01-04
申请人： Keiichiro Juri , Masahiro Ohmori
发明人： Keiichiro Juri , Masahiro Ohmori
IPC分类号： G03G21/00
摘要： A cleaning blade is provided. The cleaning blade includes an elastic body having a contact edge to contact a surface of a cleaning target to remove a residue on the surface. The elastic body includes a coating layer on at least a part of the contact edge. The coating layer contains fluorine-based particles and a binder comprising a fluorine-based oil.
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公开(公告)号：US11372363B2
公开(公告)日：2022-06-28
申请号：US17112452
申请日：2020-12-04
申请人： RICOH COMPANY, LTD.
摘要： An image forming apparatus is provided. The image forming apparatus includes an image bearer and a cleaning blade configured to remove toner particles remaining on the image bearer. The cleaning blade includes an elastic member in contact with a surface of the image bearer to remove the toner particles. The elastic member has a Martens hardness of from 3 to 8 N/mm2 when measured by a nanoindentation method with a load of 1 μN. The toner particles comprise toner base particles and an external additive, and the external additive comprise silica particles. A liberation ratio (Xs) of the silica particles liberated from the toner particles is from 40% to 75% when measured by an ultrasonic vibration method. A proportion (R70) of the silica particles having a volume-based particle diameter of 70 nm or more in the silica particles liberated from the toner particles is from 70% to 90% by number.
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公开(公告)号：US11372349B2
公开(公告)日：2022-06-28
申请号：US17299769
申请日：2020-06-10
发明人： Yuya Kato
摘要： A developing device includes a container having an opening, a developer roller disposed within the container to supply toner to a photosensitive body through the opening, and an air flow passage. The air flow passage receives air from inside of the container and supplies the air, via an end of the container in a longitudinal direction of the developer roller, to an upstream side, in a rotation direction of the developer roller, of a closest position between the developer roller and the photosensitive body. The air flow passage has an outlet that is aligned with a central area in the longitudinal direction of the developer roller.
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公开(公告)号：US20220197207A1
公开(公告)日：2022-06-23
申请号：US17531924
申请日：2021-11-22
摘要： An image forming apparatus includes a charging unit that charges an image bearing member, a developing unit that forms a toner image on an latent image formed on the image bearing member, a transfer unit that transfers the toner image onto a transfer material, a charge neutralizer that neutralizes a charge of the image bearing member downstream of a transfer portion and upstream of a charging portion in a rotating direction of the image bearing member, a conductive collecting unit that collects a material adhering on the image bearing member downstream of the transfer portion and upstream of the charging portion, wherein the developing unit collects residual toner on the image bearing member, an voltage application unit sets a potential difference between the voltage applied to the collecting unit and the surface electric potential of the image bearing member not more than a discharge threshold.
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公开(公告)号：US11340552B2
公开(公告)日：2022-05-24
申请号：US17322619
申请日：2021-05-17
发明人： Shotaro Ishihara
摘要： An image forming apparatus includes a rotatable photosensitive member, a charging unit, a developing unit, a support frame, and a sensor unit. The sensor unit is detachably attached to the support frame in a direction that intersects a rotation-axis direction of the photosensitive member and includes a potential sensor, a support portion, a fixing portion, an electric board, and a linking portion. The support portion supports the potential sensor at an area from the charging unit to the developing unit in a rotational direction of the photosensitive member. The fixing portion is fixed to the support frame at a position that faces an area from the developing unit to the charging unit in the rotational direction of the photosensitive member. The support portion is positioned with respect to the support frame at a position downstream of the support portion in an attachment direction of the sensor unit.
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