公开(公告)号：US20240353783A1

公开(公告)日：2024-10-24

申请号：US18639257

申请日：2024-04-18

Applicant: KYOCERA Document Solutions Inc.

Inventor： Ayato MORIKAMI ,  Yasuaki SAKAMOTO ,  Masaru WATANABE ,  Yukiko KOTANI ,  Atsuki ITO ,  Makoto MATSUMOTO

IPC: G03G15/00 ,  G03G15/043 ,  G03G15/06

CPC classification number: G03G15/5041 ,  G03G15/043 ,  G03G15/065 ,  G03G15/5045 ,  G03G15/5062 ,  G03G15/55 ,  G03G2215/00042 ,  G03G2215/00084 ,  G03G2215/047

Abstract: An image forming apparatus includes an image forming portion, an exposure device, an image density sensor, and a control portion. The control portion can, by adjusting the development voltage based on the image density of a reference image and the amount of exposure from the exposure device, perform image density correction to adjust the image density. The control portion predicts the toner charge amount based on a formation condition of the reference image and the image density of the reference image and determines the timing of performing the image density correction next time based on the rate of change of the toner charge amount calculated using a first toner charge amount predicted when the image density correction was performed last time, a second toner charge amount predicted when the image density correction is performed this time, and the interval between the image density correction performed last time and this time.

公开(公告)号：US20200285186A1

公开(公告)日：2020-09-10

申请号：US16809369

申请日：2020-03-04

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masaru WATANABE ,  Akira MATAYOSHI

IPC: G03G15/00 ,  G03G15/16 ,  G03G15/01

Abstract: An image forming apparatus includes a developing section, storage, a first calculation section, a comparing section, and an executing section. The developing section develops an electrostatic latent image with toner. The storage stores coverage rates. The first calculation section calculates a first coverage rate and a second coverage rate. The comparing section compares the first coverage rate with the second coverage rate. The first coverage rate includes one or more coverage rates stored earlier in the storage than the second coverage rate. The second coverage rate includes coverage rates of a specified number of latest images individually formed on the specified number of sheets. The running-in operation is driving the developing section. The executing section executes the running-in operation.

公开(公告)号：US20220137541A1

公开(公告)日：2022-05-05

申请号：US17510631

申请日：2021-10-26

Applicant: KYOCERA Document Solutions Inc.

Inventor： Yuki NAKAIWA ,  Masaru WATANABE

IPC: G03G15/00 ,  G03G15/043

Abstract: An image forming apparatus forms a coverage rate adjustment patch having a coverage rate corresponding to a difference between a coverage rate measured by a coverage rate measurement unit and a coverage rate of an adjustment image pattern together with an adjustment image pattern by using the exposure device and the developing device in the calibration.

公开(公告)号：US20200285185A1

公开(公告)日：2020-09-10

申请号：US16809357

申请日：2020-03-04

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masaru WATANABE ,  Akira MATAYOSHI

IPC: G03G15/00 ,  G03G15/16 ,  G03G15/01

Abstract: An image forming apparatus includes a developing section, storage, a first calculation section, a comparing section, and an executing section. The developing section contains toner and develops an electrostatic latent image with the toner. The storage stores coverage rates. The first calculation section calculates a first coverage rate and a second coverage rate. The comparing section compares the first coverage rate with the second coverage rate. The executing section executes a running-in operation based on a result of comparison by the comparing section. The first coverage rate includes one or more coverage rates stored earlier in the storage than the second coverage rate. The second coverage rate includes coverage rates of a specified number of latest images individually formed on the specified number of sheets. The running-in operation is driving the developing section.

公开(公告)号：US20200285172A1

公开(公告)日：2020-09-10

申请号：US16809381

申请日：2020-03-04

Applicant: KYOCERA Document Solutions Inc.

Inventor： Masaru WATANABE

IPC: G03G15/10 ,  G03G15/08

Abstract: An image forming apparatus includes an image forming section, a controller, and storage. The storage stores therein a coverage rate of a past image specified by a past print job. The controller includes a determining section and a first calculating section. When a new print job is received, the determining section determines whether or not to perform a running-in operation by comparing a coverage rate of a new image specified by the new print job to the coverage rate of the past image stored in the storage. The first calculating section calculates an amount of toner to be supplied from a developing section to a photosensitive drum based on the coverage rate of the new image. The running-in operation is to supply the toner in the amount calculated by the first calculating section from the developing section to the photosensitive drum before the new image is formed on a sheet.