Invention Grant
- Patent Title: Image forming apparatus
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Application No.: US16928894Application Date: 2020-07-14
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Publication No.: US10996586B2Publication Date: 2021-05-04
- Inventor: Takeru Nagamoto , Ryo Taniguchi , Atsuya Ikeuchi
- Applicant: KYOCERA Document Solutions Inc.
- Applicant Address: JP Osaka
- Assignee: KYOCERA Document Solutions Inc.
- Current Assignee: KYOCERA Document Solutions Inc.
- Current Assignee Address: JP Osaka
- Agency: Stein IP, LLC
- Priority: JPJP2019-132963 20190718
- Main IPC: G03G15/08
- IPC: G03G15/08 ; G03G15/00

Abstract:
An image forming apparatus includes: an image forming portion having an image carrying member, a charging device, an exposing device, and a developing device; a developing voltage power supply; a control portion; and an image density sensor. The developing device has a developer carrying member that carries two-component developer and a toner concentration sensor. The control portion senses toner concentration during calibration or during first image formation after calibration for correcting image density based on the sensing result from the image density sensor. If the difference Vtarget−V between the output value V of the toner concentration sensor actually sensed and a target value Vtarget of the toner concentration sensor to be observed when the toner concentration equals a reference concentration is equal to or larger than a predetermined value, the control portion performs calibration again when the amount of toner consumed after calibration reaches a predetermined threshold value.
Public/Granted literature
- US20210018856A1 IMAGE FORMING APPARATUS Public/Granted day:2021-01-21
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