PLASMA DISCHARGED STATIC ELIMINATOR

Abstract

There is provided a plasma discharged static eliminator comprises a power supply, electrodes and a plasma discharging electrode portion comprised of a dielectric covering the electrodes. The plasma generated by a dielectric-barrier discharge in which the dielectric functions as a barrier is used as a charged molecules source or an electrons source.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a first embodiment of static eliminator according to the present invention,

FIG. 2 shows a second embodiment of static eliminator according to the present invention for explanation of a mechanism for statically eliminating the object to be discharged,

FIG. 3 shows a plasma discharging electrode portion of a third embodiment according to the present invention,

FIG. 4 shows a plasma discharging electrode portion of a fourth embodiment according to the present invention,

FIG. 5 shows a plasma discharging electrode portion of a 5th embodiment according to the present invention,

FIG. 6 shows a plasma discharging electrode portion of a 6th embodiment according to the present invention, and

FIG. 7 shows a plasma discharging electrode portion of a 7th embodiment according to the present invention in which various electrodes are disposed.

Claims

1. A plasma discharged static eliminator which comprises a power supply, electrodes and a plasma discharging electrode portion comprised of a dielectric covering said electrodes, in which plasma generated by an dielectric-barrier discharge in which said dielectric functions as a barrier is used as charged molecules source or electrons source.

2. A plasma discharged static eliminator according to claim 1 which supplies the charged molecules or electrons generated from said plasma to a charged body to neutralize electric charge thereof.

3. A plasma discharged static eliminator according to claim 1 in which said electrodes in the dielectric are a pair of opposite electrodes and a.c. voltage of more than 1 KV in more than 1KHz is applied between the opposite electrodes.

4. A plasma discharged static eliminator according to claim 1 in which the dielectric is provided adjacent to the pair of opposite electrodes with a weaker portion of insulation performance.

5. A plasma discharged static eliminator according to claim 1 in which the dielectric is provided adjacent to the pair of opposite electrodes with a weaker portion of insulation performance in a point-like configuration, a line-like configuration or in a planar configuration.

6. A plasma discharged static eliminator according to claim 1 in which the dielectric is provided adjacent to the pair of opposite electrodes with a thinner portion than other portion to increase the density of electric flux lines outside the dielectric.

7. A plasma discharged static eliminator according to claim 1 in which the charged molecules or electrons generated by plasma discharge are made to fly away by a compressed air or a blower.

8. A plasma discharged static eliminator according to claim 1 in which generation of ozone is kept down using inert gas.

9. A plasma discharged static eliminator according to claim 1 in which the dielectric constant of said dielectric is more than 10 F/m.

10. A plasma discharged static eliminator according to claim 1 in which said opposite electrodes are of a point-like configuration, a line-like configuration, a circular configuration, or a cylindrical configuration.

11. A plasma discharged static eliminator according to claim 1 in which said opposite electrodes are disposed in a planar alignment.