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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
发明人： Yohei WAKASA , Keiya NISHIMURA
CPC分类号： G03G15/161 , G03G15/1645 , G03G21/0058
摘要： 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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公开(公告)号：US20240302768A1
公开(公告)日：2024-09-12
申请号：US18670361
申请日：2024-05-21
发明人： TAKANORI MITANI , TAKAO KUME , SATOSHI NISHIDA , ISAMU TAKEDA , KOHEI OKAYASU
CPC分类号： G03G15/0808 , G03G9/09328 , G03G15/0173 , G03G15/161 , G03G2215/00177 , G03G2215/00679
摘要： An image-forming apparatus includes first and second photosensitive drums, first and second image-forming portion including first and second development rollers configured to bear developers composed of first and second toner particles and organosilicon protrusions formed on surfaces of the first and second toner particles, an intermediate transfer member to which a developer image is to be transferred in first and second contact portions in contact with the first and second photosensitive drums, and a transfer member configured to transfer the developer image to a recording material in a transfer portion. The first contact portion is formed downstream of the transfer portion and upstream of the second contact portion in a movement direction of the surface of the intermediate transfer member. A protrusion formed on the second developer has a lower height than a protrusion formed on the first developer.
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公开(公告)号：US20240280938A1
公开(公告)日：2024-08-22
申请号：US18648163
申请日：2024-04-26
发明人： KEIKO FUJITA , KENTARO YAMANA , SHIGEO DOI , YUYA YOKOBORI , HIROSHI NOJIMA
CPC分类号： G03G21/206 , G03G15/161 , G03G15/2028 , G03G2215/0132 , G03G2215/1661 , G03G2221/1642
摘要： An image forming apparatus includes a photosensitive member, a transfer unit having a transfer belt, a primary transfer roller, a secondary transfer inner roller below the primary transfer roller in a vertical direction, and a stretching roller, a secondary transfer outer roller, a support unit, and an air duct provided in the transfer unit. The secondary transfer outer roller faces the secondary transfer inner roller via the transfer belt and forms a nip portion for secondarily transferring a toner image on the transfer belt to a sheet. The air duct is located downstream of the nip portion in a sheet conveyance direction and below a portion of the transfer belt stretched between the secondary transfer inner roller and the stretching roller in the vertical direction. The air duct includes an air intake port and moves with the transfer unit with movement of the transfer unit from the support unit.
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公开(公告)号：US20240255890A1
公开(公告)日：2024-08-01
申请号：US18400097
申请日：2023-12-29
申请人： Yutaka GOTO , Seiichi KOGURE , Hiroshi KIKUCHI , Hirotaka HATTA , Hideki KIMURA , Yusuke ISHIZUKA , Takuya AKIYAMA , Yuuki AOKI
发明人： Yutaka GOTO , Seiichi KOGURE , Hiroshi KIKUCHI , Hirotaka HATTA , Hideki KIMURA , Yusuke ISHIZUKA , Takuya AKIYAMA , Yuuki AOKI
CPC分类号： G03G21/0047 , G03G15/161 , G03G21/0076 , G03G2221/001 , G03G2221/1627
摘要： An image forming apparatus includes a toner image bearer, a transfer device, a cleaner, a bias power source, and circuitry. The toner image bearer bears a toner image. The transfer device performs a transfer process The cleaner contacts the toner image bearer to remove transfer residual toner that is subject to the transfer process and remove untransferred toner that is not subject to the transfer process. The bias power source applies one of a first bias and a second bias different from the first bias to the cleaner. The circuitry controls the bias power source to output the first bias to the cleaner in response to a start of an image forming operation to remove the untransferred toner from the toner image bearer and control the bias power source to switch an output from the first bias to the second bias.
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公开(公告)号：US12045000B2
公开(公告)日：2024-07-23
申请号：US18065200
申请日：2022-12-13
申请人： Kazuhiko Watanabe , Hiroshi Nakai
发明人： Kazuhiko Watanabe , Hiroshi Nakai
CPC分类号： G03G21/0094 , G03G15/161 , G03G21/0011 , G03G2215/1661 , G03G2221/1609
摘要： An image forming apparatus includes a latent image bearer, an intermediate transferor, a primary transferor, a second transferor, and a cleaning blade. The latent image bearer has a surface onto which a lubricant comprising zinc stearate is supplied. The intermediate transferor has a surface onto which the toner image is transferred, the surface including an adhering region to which the lubricant from the latent image bearer adheres. The cleaning blade cleans the surface of the intermediate transferor including the adhering region, after the toner image is secondarily transferred. In a region outside at least a horizontal A4 sheet passing width on the intermediate transferor, a ratio of a peak area derived from zinc stearate to a peak area derived from the intermediate transferor in a difference spectrum between attenuated total reflection (ATR) infrared absorption spectrums of the intermediate transferor in an unused state and after use is 0.892 or less.
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公开(公告)号：US20240160142A1
公开(公告)日：2024-05-16
申请号：US18326660
申请日：2023-05-31
发明人： Tomohisa SUZUKI , Yutaka KIUCHI , Daisuke NAKAI
CPC分类号： G03G15/5041 , G03G15/161 , G03G2215/00059 , G03G2215/00063 , G03G2215/047
摘要： An image forming apparatus includes: multiple image carriers holding developers; multiple potential detectors that are mounted in a first scanning direction on each of the image carriers and detect surface potentials of the image carriers; an intermediate transfer body to which the developers held by the image carriers are transferred; and multiple density detectors that are mounted in the first scanning direction of the intermediate transfer body and detect densities of the developers transferred to the intermediate transfer body. A subset of the potential detectors is mounted at a location corresponding to a location where the density detectors are mounted and a subset of the potential detectors is mounted at a location that is common to the image carriers.
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公开(公告)号：US20240134303A1
公开(公告)日：2024-04-25
申请号：US18486068
申请日：2023-10-12
发明人： SHOHEI ISHIO , KEISUKE ISHIZUMI
CPC分类号： G03G15/162 , G03G15/0216 , G03G15/161 , G03G15/6597 , G03G21/007 , G03G2215/066
摘要： An image forming apparatus includes an image bearing member, an intermediate transfer member, a reinforcing member, and a collection unit having a contact member and a support member. The contact member extends in a longitudinal direction that is orthogonal to an intermediate transfer member movement direction. One end of the contact member is fixed to the support member and the other end is in contact with the intermediate transfer member as a free end. When a maximum region in the longitudinal direction where an image is formable on a transfer medium having a maximum size that is supported by the image forming apparatus is defined as an image forming region, at least part of the reinforcing member is located outside the image forming region and, on one end side of the contact member, the reinforcing member is provided on an inner side than the end of the contact member.
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公开(公告)号：US20240118658A1
公开(公告)日：2024-04-11
申请号：US18482089
申请日：2023-10-06
申请人： Konica Minolta, Inc.
发明人： Takashi KAWANAGO
CPC分类号： G03G21/203 , G03G15/161
摘要： An image forming apparatus forming an image on a recording medium, includes: a developing device that forms a toner image on an image carrier, a transfer device that transfers the toner image formed by the developing device to a recording medium at a transfer position, and a charge eliminator that is arranged upstream of the transfer position in a conveyance direction of the recording medium and eliminates charges of the recording medium in a non-contact manner, wherein the charge eliminator is an ionizer and is arranged at a position which is away by a predetermined distance from a conductor for moving ionic particles generated at the time of charge elimination.
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公开(公告)号：US11947285B2
公开(公告)日：2024-04-02
申请号：US17971207
申请日：2022-10-21
发明人： Ryosuke Tsuruga , Manato Kobayashi , Yutaka Kakehi
IPC分类号： G03G15/16
CPC分类号： G03G15/161 , G03G15/1615
摘要： An image forming apparatus includes an image forming portion, a rotatable endless belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, a guiding member, a sheet-like pressing member, and a coating member. The coating member is disposed on the pressing member so as not to contact the belt and is electrically grounded or electrically conducted to the guiding member. The coating member is formed of a material lower in surface resistivity than the pressing member.
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公开(公告)号：US20240103424A1
公开(公告)日：2024-03-28
申请号：US18180972
申请日：2023-03-09
发明人： Yu TSUDA
CPC分类号： G03G21/0029 , G03G15/161 , G03G21/0058
摘要： A cleaning device, for cleaning an image holding body that rotates while holding a toner image on an outer circumferential surface of the image holding body, includes: a scraping member that scrapes toner sticking to the outer circumferential surface of the image holding body in a rotating state by a distal end of the scraping member being in contact with, in the outer circumferential surface, in a region in which the image holding body moves upward from below; a trapping member in which toner scraped from the outer circumferential surface to fall is trapped; and at least one raising member that raises up toner trapped in the trapping member, toward the distal end of the scraping member.
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