Abstract A device for electrostatically charging or discharging surfaces of a web or sheet material or charging photoconductive insulating layers comprising two mounted rows of needles which are separated from one another but parallel to one another with each row being of a different electrical potential. Within each row the distance between adjacent needles remains constant. Furthermore each needle of one row is coordinated at an acute angle with a needle of the other row by separating walls extending from one row of needles to the other row of needles. The angle between coordinated needles is below 45*. The needle distance is about three needle thicknesses with the needle thickness ranging between about 0.1 to 1 mm. Preferably the device includes a counterelectrode having an electrical potential equal to one row of needles.
A device for electrostatically charging or discharging of surfaces of material, comprising two rows of needles arranged transversely to the direction of travel of the material, with the points of said needles forming an area parallel to the surface of the material, said rows being separated from one another, parallel to one another and of different electric potential, with each row having a constant distance between needles therein, and with each needle of one row of needles being coordinated at an acute angle to a needle of the other row of needles by intermediate separating walls.
Claim 2
Independent Claim
96 words
A device for electrostatically charging or discharging of surfaces of material, comprising two rows of needles arranged transversely to the direction of travel of the material, with the points of said needles forming an area parallel to the surface of the material, said rows being separated from one another, parallel to one another and of different electric potential, with each row having a constant distance between needles therein, and with each needle of one row of needles being coordinated at an acute angle to a needle of the other row of needles by intermediate separating walls.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein the acute angle is below 45*.
Claim 4
Dependent Claim
19 words
The device of claim 1 wherein the needle distance of a row of needles is about three needle thicknesses.
Claim 5
Dependent Claim
27 words
The device of claim 1 wherein the longitudinally inserted needles are so arranged that a needlE is on the mid-vertical on the distance between two opposing needles.
Claim 6
Dependent Claim
17 words
The device of claim 1 wherein the needle thicknesses range between about 0.1 and about 1 mm.