| 摘要 |
<p>PURPOSE:To enhance attractive force by providing an electric-charge applying means being in contact with a transfer belt formed by a dielectric substance, and by constituting a large number of electrode parts whose electric-charge applying means has been connected to a power supply and the nonelectrode parts between them in such a way that the width of each nonelectrode part is wider than that of each electrode part. CONSTITUTION:An endless conveyor belt 1 is formed by a dielectric substance such as Mylar, and is wound around a metallic conveyor roller 2 that has been grounded. An electrode roller 3 being an electric-charge applying member is entirely formed by a conductive material such as metal, and is provided so as to be in contact with or to be adjacent to the conveyor belt 1, and is connected to a d.c. power supply 4. In the electrode roller 3, a large number of electrode parts 5 projected in the outer circumferential direction and nonelectrode parts 6 of a recessed shape are formed and alternately arranged. And it is so contrived that the width (c) of the electrically- charged region 8 of the conveyor belt 1 is equal to the width (d) of the nonelectrically- charged region 9, and that the width (b) of the nonelectrode part 6 is larger than the width (a) of the electrode part 5. Thus, the boundary of regions 8, 9 can be made clear, and the part of the boundary having a strong electric field can be increased, and paper sheets can be accurately attracted by the edge effect.</p> |
