Apparatus and method to control free charge on moving webs

Details Apparatus and method to control free charge on moving webs Apparatus and method to control free charge on moving webs

1994-03-10

1995-07-11

Snow, Walter E.

Electricity: measuring and testing

A material property using electrostatic phenomenon

361213, 264 22, G01N 2760, H05F 306

Patent

active

054324548

ABSTRACT:
The present invention is a method and apparatus for controlling free charge on a moving web. The method and apparatus includes two DC ionizers one of each polarity positioned near one surface of the web. A conductive plate mounted on the opposite side of the web opposite the DC ionizers is controlled in response to the free charge measured on the web downstream of the ionizers. The present invention allows control of the free charge on the web to almost zero without imparting any frequency in the charge on the web.

REFERENCES:
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patent: 4974115 (1990-11-01), Breidegam et al.
A. R. Blythe & W. Reddish, "Static eliminator systems for difficult industrial applications", pp. 115-123, Inst. Phys. Conf. Ser. No. 48.
N. Denbow & A. W. Bright, "The design and performance of novel on-line electrostatic charge-density monitors, injectors and neutralisers for use in fuel systems", pp. 171-179, Inst. Phys. Conf. Ser. No. 48.
A. R. Blythe, "A device for controlling static charge levels on film", pp. 239-245, Inst. Phys. Conf. Ser. No. 27, Chapter 3.
Prof. T. Horvath and Dr. I. Berta, "Static Elimination", pp. 58-59, 98-99, 100, Electronic and Electrical Engineering Research Studies, undated.
N. Shikhov, V. P. Sitnikov, O. A. Petrov, and V. I. Pyastolov, "An efficient high-voltage electrostatic charge neutralizer", translated Russian article, undated.

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