Japan, July 14 -- CANON INC has got intellectual property rights for 'IMAGE FORMING APPARATUS.' Other related details are as follows:
Application Number: JP,2022-037939
Category (FI): G03G15/08,221,G03G21/18,189,G03G15/02,102,G03G15/08,235,G03G21/14,G03G15/08,226,G03G15/08,220,G03G21/00,370,G03G21/18,178,G03G21/18,114,G03G21/00,512,G03G21/00,388,G03G15/06,101
Stage: PROBLEM TO BE SOLVED: To prevent the occurrence of fogging at the start of using a new developing device.SOLUTION: In an operation period A, a control unit controls a power supply unit so that a supply potential difference and a regulation potential difference have the same polarity as the polarity of the supply potential difference and the regulation potential difference in an image forming operation, and an absolute value is reduced or become zero. In an operation period B, the control unit controls the power supply unit so that the supply potential difference and a regulation potential difference have the same polarity as the polarity of the supply potential difference and the regulation potential difference in the operation period A, and the absolute value is increased. In transition from the operation period A to the operation period B, the control unit controls the power supply unit to change the regulation potential difference at a timing earlier than the timing when a surface of a developing roller located at a first position when the supply potential difference is changed reaches a second position without passing through a developing unit in accordance with the rotation of the developing roller.SELECTED DRAWING: Figure 3 (Grant)
Filing Date: March 11, 2022
Publication Date: Sept. 22, 2023
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
