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公开(公告)号：US12078950B2
公开(公告)日：2024-09-03
申请号：US18336835
申请日：2023-06-16
Applicant: KYOCERA Document Solutions Inc.
Inventor： Koji Uno , Keisuke Oba , Yasuhiro Michishita
CPC classification number: G03G15/80 , G03G15/0131 , G03G15/0806 , G03G15/162 , G03G15/5004 , G03G2215/00632
Abstract: An image forming apparatus includes an image carrying member, an intermediate transfer belt, a primary transfer roller, a first belt support roller, a secondary transfer roller, a second belt support roller, a current feeder, a controller, a current sensor, and a rectifier. The current sensor has a lead member. The rectifier shuts off a current passing from the second belt support roller to the ground if the voltage on the second belt support roller is less than a predetermined reference voltage. The controller controls the output current such that the secondary transfer current has a current value resulting from subtracting a leak current from the output current and, when the lead member is in a conducting state, keeps the voltage on the second belt support roller less than the reference voltage.
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公开(公告)号：US12013651B2
公开(公告)日：2024-06-18
申请号：US18338010
申请日：2023-06-20
Applicant: KYOCERA Document Solutions Inc.
Inventor： Koji Uno , Keisuke Oba , Yasuhiro Michishita
CPC classification number: G03G15/1675 , G03G15/1685 , G03G15/5054 , G03G15/80 , G03G2215/1614 , G03G2215/1623
Abstract: An image forming apparatus includes an image carrying member, an intermediate transfer belt, a primary transfer roller, a first belt support roller, a secondary transfer roller, a second belt support roller, a current output portion, a current sensing portion, and a control portion. The current output portion passes across the secondary transfer roller a secondary transfer current as part of an output current. The current output portion and the second belt support roller are electrically connected together. The current sensing portion senses a leakage current passing from the first belt support roller via the intermediate transfer belt to the second belt support roller. The control portion sets the output current such that the secondary transfer current has a value given by subtracting a leakage current from the output current and keeps the voltage on the second belt support roller between −50 V and 50 V, inclusive.
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Patent Agency Ranking
公开(公告)号：US12111584B2
公开(公告)日：2024-10-08
申请号：US18331678
申请日：2023-06-08
Applicant: KYOCERA Document Solutions Inc.
Inventor： Yasuhiro Michishita , Keisuke Oba , Koji Uno
CPC classification number: G03G15/0233 , G03G15/025 , G03G15/04 , G03G15/1605 , G03G15/167 , G03G15/6535 , G03G15/657 , G03G21/06 , G03G2221/0047
Abstract: An image forming apparatus includes a plurality of image forming portions, an intermediate transfer belt, a primary transfer member, a secondary transfer roller, a counter roller, and a charge eliminating device. The counter roller is pressed against the secondary transfer roller via an intermediate transfer belt to thereby form a secondary transfer nip portion. The charge eliminating device includes a charge eliminating needle that is disposed with an end part thereof pointing to a downstream side in a conveyance direction of the recording medium, and that is grounded, and a charge eliminating needle protection cover that has a guide surface that is opposed to the recording medium having passed through the secondary transfer nip portion, and that maintains a constant interval between the recording medium and the charge eliminating needle, and eliminates residual charge on the recording medium having passed through the secondary transfer nip portion.
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公开(公告)号：US20230213880A1
公开(公告)日：2023-07-06
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 , G03G15/5058 , G03G15/0131 , 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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15.发明公开公开(公告)号：US20230164284A1
公开(公告)日：2023-05-25
申请号：US18057456
申请日：2022-11-21
Applicant: KYOCERA Document Solutions Inc.
Inventor： Kanako Kikuchi , Akihiro Kondo , Keisuke Oba
CPC classification number: H04N1/6027 , G03G15/28 , H04N1/4074 , H04N1/6019
Abstract: An image forming apparatus includes an image forming portion, a first acquisition processing portion, a second acquisition processing portion, and an adjustment processing portion. The image forming portion forms an image on a sheet. The first acquisition processing portion acquires a captured image of the sheet. The second acquisition processing portion acquires a specific value that indicates a difference between a gradation value of a pixel that, among pixels included in the captured image acquired by the first acquisition processing portion, corresponds to a higher part of an outer surface of the sheet, and a gradation value of a pixel that, among the pixels included in the captured image, corresponds to a lower part that is lower than the higher part. The adjustment processing portion adjusts an image forming condition of the image forming portion based on the specific value acquired by the second acquisition processing portion.
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公开(公告)号：US20230080093A1
公开(公告)日：2023-03-16
申请号：US17932620
申请日：2022-09-15
Applicant: KYOCERA Document Solutions Inc.
Inventor： Keisuke Oba , Masaru Watanabe , Yasuaki Sakamoto , Kanako Kikuchi , Ayato Morikami , Yuki Nakaiwa , Koji Uno , Takuji Watanabe
IPC: G03G15/00
Abstract: An image forming apparatus includes a transfer processing portion, a detection processing portion, a correction processing portion, and an adjustment processing portion. The transfer processing portion transfers a detection toner image to outside an output area of a transfer object to which a toner image as an output target is transferred from an image-carrying member. The detection processing portion detects a density of the detection toner image that has been transferred to the transfer object by the transfer processing portion. The correction processing portion corrects a detection result of the detection processing portion based on an amount of toner transferred from the image-carrying member to the output area at a transfer timing when the detection toner image is transferred. The adjustment processing portion adjusts an image forming condition based on the detection result after correction by the correction processing portion.
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17.发明申请公开(公告)号：US20230051298A1
公开(公告)日：2023-02-16
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
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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