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公开(公告)号：US12001159B2
公开(公告)日：2024-06-04
申请号：US18147174
申请日：2022-12-28
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masaru Watanabe , Kanako Kikuchi , Yasuaki Sakamoto , Ayato Morikami , Yuki Nakaiwa , Keisuke Oba , Koji Uno , Takuji Watanabe
CPC classification number: G03G15/5041 , G03G15/0131 , G03G15/5058 , G03G2215/00059
Abstract: A processor causes a printing portion to execute, when first conveying processing is executed, test print processing for executing processing of forming a plurality of test toner images on a sheet under a print condition that differs for each of the plurality of test toner images. The processor acquires a plurality of first sensing densities when the first conveying processing is executed. The processor causes the printing portion to execute the test print processing when second conveying processing is executed. The processor acquires a plurality of second sensing densities when the second conveying processing is executed. The processor compares the plurality of first sensing densities and the plurality of second sensing densities to adjust the print condition in the print processing when the second conveying processing is executed.
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公开(公告)号：US11868060B2
公开(公告)日：2024-01-09
申请号：US17884421
申请日：2022-08-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Masaru Watanabe , Kanako Kikuchi , Yasuaki Sakamoto , Ayato Morikami , Yuki Nakaiwa , Keisuke Oba , Koji Uno , Takuji Watanabe
IPC: G03G15/043
CPC classification number: G03G15/043
Abstract: An image forming apparatus includes a developing current detecting portion, a control portion, and a deviation detecting portion. The developing current detecting portion detects a developing current that flows between a developing device and a photoconductor drum during development of an electrostatic latent image. The control portion causes the exposure device to form electrostatic latent images of at least two patch images at different positions from each other and at different timings from each other in a main scanning direction. The deviation detecting portion detects deviation of one of the exposure device and the photoconductor drum with respect to the other based on a detection timing at which the developing current is detected during development of the electrostatic latent images of the at least two patch images.
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公开(公告)号：US20130279928A1
公开(公告)日：2013-10-24
申请号：US13867459
申请日：2013-04-22
Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
Inventor： Shingo Sakato , Takuji Watanabe
CPC classification number: G03G15/24 , G03G15/0266 , G03G15/1675
Abstract: An image forming apparatus includes a photosensitive drum, a charging roller, a transfer roller, a first bias application unit, a second bias application unit, and a control unit. The charging roller contains an ion conductive material. The first bias application unit applies a first bias to the charging roller. The second bias application unit applies a predetermined bias to the transfer roller. The control unit controls the first bias application unit not to apply the first bias to the charging roller in a non-image forming period in which a toner image is not formed on the photosensitive drum. The control unit controls the second bias application unit to apply the second bias, which is a bias that can electrically charge the surface of the photosensitive drum, to the transfer roller in the non-image forming period.
Abstract translation: 图像形成装置包括感光鼓，充电辊，转印辊，第一偏压施加单元，第二偏压施加单元和控制单元。 充电辊包含离子导电材料。 第一偏置施加单元对充电辊施加第一偏压。 第二偏压施加单元对转印辊施加预定的偏压。 控制单元控制第一偏置施加单元在不在感光鼓上未形成调色剂图像的非图像形成期间内对第一偏压施加到充电辊。 控制单元控制第二偏压施加单元，以在非图像形成期间内将作为可以使感光鼓的表面充电的偏压的第二偏压施加到转印辊。
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公开(公告)号：US10976680B2
公开(公告)日：2021-04-13
申请号：US16737426
申请日：2020-01-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Takuji Watanabe , Norio Tomiie
Abstract: In an image forming apparatus, a bias controller varies one, while keeping the other fixed, of a charging alternating-current frequency, which is the frequency of the charging alternating-current voltage, and a developing alternating-current frequency, which is the frequency of the developing alternating-current voltage. Specifically, in a case where interference fringes appear in a developed image due to interference between the charging and developing alternating-current frequencies, when the recognizable minimum pitch of the interference fringes is A1 (mm), the width of the variation region of the other frequency is B1 (Hz), the rotation speed of an image carrying member is C1 (mm/sec), and the variation speed of the other frequency in the variation region is D1 (Hz/sec), the bias controller varies the other frequency at a variation speed D1 that fulfills |D1|>B1/(A1/C1).
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公开(公告)号：US10082764B2
公开(公告)日：2018-09-25
申请号：US15838128
申请日：2017-12-11
Applicant: KYOCERA Document Solutions Inc.
Inventor： Shinji Yamane , Takuji Watanabe
CPC classification number: G03G21/1676 , G03G15/0921 , G03G21/1604 , G03G2215/0619
Abstract: A developing device includes a developing roller and a developing magnetic pole. The developing roller is disposed to face an image carrier across a predetermined gap. The developing magnetic pole is provided in the developing roller so as to be displaced between first and second magnetic pole positions. When the developing magnetic pole is at the first magnetic pole position, a magnetic field is generated at a first position in the gap. When the developing magnetic pole is at the second magnetic pole position, a magnetic field is generated at a second position in the gap. When a circumferential speed ratio of the developing roller to the image carrier is increased, the developing magnetic pole is displaced toward the second magnetic pole position, and when the circumferential speed ratio is decreased, the developing magnetic pole is displaced toward the first magnetic pole position.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20170285506A1
公开(公告)日：2017-10-05
申请号：US15474869
申请日：2017-03-30
Applicant: KYOCERA Document Solutions Inc.
Inventor： Hiroka Itani , Nariaki Tanaka , Shingo Sakato , Kiyotaka Kobayashi , Takuji Watanabe , Eriko Hayashi
IPC: G03G21/00
CPC classification number: G03G21/06
Abstract: An image forming apparatus includes a photoconductor and an electricity removing member electrically grounded and disposed to be in contact with a surface of the photoconductor. In the image forming apparatus, with regard to a capacitance component of an inner impedance of the electricity removing member and a capacitance component of a contact impedance of the electricity removing member that are calculated from a Cole-Cole plot obtained from measurement by an AC impedance method in a predetermined frequency range, a value obtained by dividing the capacitance component of the contact impedance by the capacitance component of the inner impedance is equal to or lower than a predetermined first specific value, and the capacitance component of the inner impedance is equal to or lower than a predetermined second specific value.
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公开(公告)号：US12007712B2
公开(公告)日：2024-06-11
申请号：US18332143
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Junichi Nakagawa , Tamotsu Shimizu , Hiroshi Yamazaki , Kenichi Tamaki , Takuji Watanabe
CPC classification number: G03G21/0052 , G03G7/0013 , G03G15/0808 , G03G15/081 , G03G15/0889 , G03G21/206 , G03G2215/085 , G03G2221/0021
Abstract: Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered by a cleaning unit through intermediation of an image bearing member. An absolute value of a perpendicular-magnetic-force gradient of a fixed magnet of the developer carrying member is 4.0 mT/° or less at a position where the fixed magnet faces a central portion of the filter in a rotation direction of a developing sleeve.
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8.发明申请公开(公告)号：US20190072894A1
公开(公告)日：2019-03-07
申请号：US16081152
申请日：2018-01-12
Applicant: KYOCERA Document Solutions Inc.
Inventor： Shingo Sakato , Nariaki Tanaka , Kiyotaka Kobayashi , Hiroka Itani , Takuji Watanabe , Eriko Hayashi
Abstract: In an image forming apparatus, a resistance component of an inner impedance of an electricity removing member is equal to or lower than a value that is obtained by multiplying a calculated resistance value by a first specific value, the calculated resistance value being calculated based on a predetermined formula as a DC resistance value of the electricity removing member that is required to reduce a pre-electricity-removal potential of a photoconductor to a predetermined post-electricity-removal potential during an electricity removal time, the first specific value being calculated based on a ratio of a linear speed of the electricity removing member to a linear speed of the photoconductor, and a resistance component of the contact impedance of the electricity removing member is equal to or lower than a value that is obtained by multiplying the calculated resistance value by a second specific value that is calculated based on the ratio.
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公开(公告)号：US12092993B2
公开(公告)日：2024-09-17
申请号：US18332440
申请日：2023-06-09
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kenichi Tamaki , Hiroshi Yamazaki , Junichi Nakagawa , Takuji Watanabe , Tamotsu Shimizu
CPC classification number: G03G21/206 , G03G15/0848 , G03G15/0898 , G03G15/0921
Abstract: Provided is an image forming apparatus in which, while image formation is prevented from being performed, scattered toner that has dropped from a filter and adhered to an outer peripheral surface of a developer carrying member is recovered. A fixed magnet of the developer carrying member has a first pole that is arranged to face the filter, and a second pole and a third pole on a downstream side relative to the first pole. The first pole and the second pole have polarities opposite to each other, and the second pole and the third pole have a same polarity. A length of a gap between the developing container and an area where the developing sleeve faces the second pole among areas of the developing sleeve is smaller than a length between the developing sleeve and the filter.
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公开(公告)号：US11977350B2
公开(公告)日：2024-05-07
申请号：US18331671
申请日：2023-06-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Junichi Nakagawa , Tamotsu Shimizu , Hiroshi Yamazaki , Kenichi Tamaki , Takuji Watanabe
CPC classification number: G03G21/206 , G03G15/0266 , G03G15/065 , G03G15/09 , G03G15/5008 , G03G21/0047 , G03G21/0052 , G03G21/10 , G03G21/105 , G03G21/1814 , G03G2215/00025 , G03G2221/1645
Abstract: An image forming apparatus includes an image carrier, a cleaning unit, a development device, and a control unit. The development device includes a toner collection mechanism having a developer carrier and a filter. The control unit is capable of executing a scattered toner recovery mode at non-image forming time, in which the filter is vibrated, a potential difference is generated in the direction for the toner to move from the developer carrier to the image carrier, the developer carrier is rotated in a reverse direction to that at image forming time, and the image carrier is rotated in the same direction as that at the image forming time, so that scattered toner, which has dropped from the filter and adhered to the developer carrier, is recovered by the cleaning unit via the image carrier.
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