| 发明名称 |
System for charging a photoreceptor |
| 摘要 |
A system for charging a photoreceptor (3) includes a first corona charging unit (2) a first corona electrode (4), a first shell electrode (6), and a first high voltage power supply (22). The shell electrode is connected through a resistor to ground and the high voltage power supply is connected to the first corona electrode. A second corona charging unit (10) has a second corona electrode (12), and a first grid electrode (14) connected to a second shell electrode (16). A first corona current from the first high voltage power supply to the first corona electrode and a return current from the first shell electrode to ground is sensed and a voltage on the high voltage power supply is adjusted to maintain a constant difference. The first corona charging unit charges the photoreceptor to at least 63% of the desired voltage. |
| 申请公布号 |
US8948635(B2) |
申请公布日期 |
2015.02.03 |
| 申请号 |
US201213465052 |
申请日期 |
2012.05.07 |
| 申请人 |
Eastman Kodak Company |
发明人 |
Zaretsky Mark C. |
| 分类号 |
G03G15/02 |
主分类号 |
G03G15/02 |
| 代理机构 |
|
代理人 |
Blish Nelson Adrian |
| 主权项 |
1. A system for charging a photoreceptor to a desired voltage level comprising:
a first corona charging unit having a first corona electrode, a first shell electrode, and a first high voltage power supply; wherein the first shell electrode is connected through a resistor to a first ammeter; wherein the first high voltage power supply is connected to the first corona electrode; a second corona charging unit having a second corona electrode, a first grid electrode, and a second shell electrode; wherein the grid electrode is connected to the second shell electrode; a second ammeter for sensing a first corona current from the first high voltage power supply to the first corona electrode; wherein the first ammeter senses a return current from the first shell electrode to ground; a controller for adjusting a voltage on the first high voltage power supply to maintain a constant difference between the first corona current and the return current; wherein the first corona charging unit charges the photoreceptor to at least 63% of the desired voltage; and wherein the second corona charging unit charges the photoreceptor to within plus or minus 10% of the desired voltage. |
| 地址 |
Rochester NY US |
