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公开(公告)号：US20240345500A1
公开(公告)日：2024-10-17
申请号：US18628022
申请日：2024-04-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Keiya NISHIMURA , Yohei WAKASA
CPC classification number: G03G15/0266 , G03G21/0058
Abstract: In the image forming apparatus, a controller applies a collection voltage to a cleaning roller by a voltage application part in image formation process. The controller adjusts the collection voltage applied to the cleaning roller on bases of uncollected toner quantity of a toner image and residual charge of an image carrier, the uncollected toner being part of after-transfer remaining toner which results after formation of the toner image on an outer circumferential surface of the image carrier and transfer of the toner image onto a transfer-objective member, and which has missed being collected by the cleaning roller so as to remain even after one-round rotation of the image carrier.
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公开(公告)号：US20210149320A1
公开(公告)日：2021-05-20
申请号：US17098405
申请日：2020-11-15
Applicant: KYOCERA Document Solutions Inc.
Inventor： Tamotsu SHIMIZU , Takahiro OKUBO , Yohei WAKASA , Kazuhiro NAKACHI
Abstract: Provided is an image forming apparatus having a simple configuration capable of measuring a toner current included in a developing current and accurately calculating a toner charge amount based on the measurement result. The developing device has a developer carrier that carries a two-component developer including a magnetic carrier and toner. The density detecting device detects the density of the toner image. The current detecting unit detects a DC component of a developing current that flows when a developing voltage is applied to the developer carrier. The control unit, in a state in which the image carrier is rotated at two or more different linear speeds during non-image formation, forms the same reference image on the image carrier by the developing device, and estimates the toner charge amount based on the developing current when the reference image is formed and the density of the reference image.
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公开(公告)号：US20240345531A1
公开(公告)日：2024-10-17
申请号：US18628047
申请日：2024-04-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Keiya NISHIMURA , Yohei WAKASA
CPC classification number: G03G21/0058 , G03G15/5004 , G03G15/55 , G03G15/80 , G03G21/007
Abstract: In the image forming apparatus, a controller applies a collection voltage to a cleaning roller by a voltage application part in image formation process. After making a toner image formed on an outer circumferential surface of an image carrier and transferred to a transfer-objective member, the controller predicts a toner charging level of after-transfer remaining toner which results after the transfer of the toner image, and changes at least either one of absolute value or polarity of the collection voltage applied to the cleaning roller in response to the toner charging level.
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公开(公告)号：US20240345511A1
公开(公告)日：2024-10-17
申请号：US18627774
申请日：2024-04-05
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yohei WAKASA , Keiya NISHIMURA
CPC classification number: G03G15/161 , G03G15/1645 , G03G21/0058
Abstract: In the image forming apparatus, a controller makes a reference image formed on an outer circumferential surface of an image carrier and transferred to a belt. Then, uncollected toner of the reference image, which is part of after-transfer remaining toner of the reference image that has missed being collected so as to remain even after one-round rotation of the image carrier, is transferred to the belt. The controller measures a collectable toner quantity corresponding to an applied voltage of the cleaning roller on a basis of an uncollected toner quantity estimated based on a toner concentration of the uncollected toner, and executes such adjustment that the collectable toner quantity becomes equal to or larger than a maximum value of the after-transfer remaining toner quantity and moreover the applied voltage becomes equal to or lower than a maximum applicable voltage.
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