Kenneth L Clum

US Patent:

50669184, Nov 19, 1991

Filed:

Dec 14, 1990

Appl. No.:

7/627174

Inventors:

Robert J. Pazda - Waterloo NY
Kenneth L. Clum - Webster NY
Harrison P. Hood - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01N 2761
G03G 1500

US Classification:

324452

Abstract:

Apparatus for measuring lateral charge distribution on a moving web includes a cylindrical roller having at least a pair of charge measuring segments on the cylinder surface which are electrically isolated from each other and aligned end-to-end in the direction of the axis of rotation of the cylinder. Each of the measurement segments is adapted to be connected to a separate electrometer. The cylinder is mounted on a support to move the cylinder in a direction perpendicular to the longitudinal direction of conveyance of the web over the surface of the cylinder. A measuring device for measuring lateral displacement of the cylinder is used for calculation of the proportion of web area in contact with one segment relative to the total web area in contact with both segments. The proportionate measured charge represents the integral charge on a fraction of the web and by taking periodic measurements as the cylinder is moved laterally across the web, a profile of lateral integral charge distribution is determined. The corresponding profile of lateral charge density distribution is then readily determined by differentiation of the charge distribution profile curve.

US Patent:

54002087, Mar 21, 1995

Filed:

Oct 5, 1993

Appl. No.:

8/132144

Inventors:

Robert J. Pazda - Waterloo NY
Kenneth L. Clum - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H05F 302

US Classification:

361221

Abstract:

Static charge on a charge retaining, somewhat conductive moving web is reduced by a non-contacting apparatus placed at the edge of and coplanar with the moving web. The apparatus is comprised of metallic needles or bristles, a conductive support or other conductive material connecting the needles or bristles in parallel, and an electrical ground connected to the support by an electrical coupling means, which together make up a conductive path for static charges to be removed from the moving web to ground.

US Patent:

48620653, Aug 29, 1989

Filed:

Apr 7, 1988

Appl. No.:

7/178700

Inventors:

Robert J. Pazda - Waterloo NY
Kenneth L. Clum - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01R 2702
G01R 2726

US Classification:

324 65R

Abstract:

A web roller is provided with at least two electrodes that are positioned parallel to each other on the roller surface end parallel to the longitudinal axis of the roller. Slip rings provide individual electrical connections to the electrodes. The electrodes are spaced apart a distance which permits both electrodes to be in contact with a web of sheet material of the type having a conductive center sandwiched between layers of insulating sheet. A position detector, positioned to detect the rotation of the roller, provides a pulse signal of a known magnitude to one of the electrodes, through a slip ring, when the electrodes are in contact with the web of sheet material. A sensor coupled to the other electrode, through a slip ring, receives the pulse signal after it has passed through the sheet material located between the two electrodes. The magnitude of the received pulse is a function of the resistivity of the sheet material.

US Patent:

54555140, Oct 3, 1995

Filed:

Jun 20, 1994

Appl. No.:

8/261786

Inventors:

Robert J. Pazda - Waterloo NY
Kenneth L. Clum - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01N 2760
G03G 1500

US Classification:

324452

Abstract:

The present invention is a device for measuring the electric surface charge density on each surface of a sheet. The sheet can either be moving or non-moving. If the sheet is non-moving a pliers-like device having a pair of electrodes aligned opposite with each other is used. The sheet is placed between the electrodes and the surface measurement is made by either one or two electrometers. For a moving web, the apparatus includes a first and second roller each having a charge measurement segment electrically isolated from the roller shell wherein the charge measurement segments periodically engage the web running through the two rollers. Two grounded shields which periodically shield the charge measurement segment are provided. Two electrometers are provided and from this surface charge density measurement and net charge density measurement on the moving sheet are obtained.

US Patent:

55857302, Dec 17, 1996

Filed:

Jul 13, 1995

Appl. No.:

8/501856

Inventors:

Robert J. Pazda - Waterloo NY
Kenneth L. Clum - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G01N 2760
G03G 1500

US Classification:

324452

Abstract:

The present invention is a device for measuring the electric surface charge density on each surface of a sheet. The sheet can either be moving or non-moving. If the sheet is non-moving a pliers-like device having a pair of electrodes aligned opposite with each other is used. The sheet is placed between the electrodes and the surface measurement is made by either one or two electrometers. For a moving web, the apparatus includes a first and second roller each having a charge measurement segment electrically isolated from the roller shell wherein the charge measurement segments periodically engage the web running through the two rollers. Two grounded shields which periodically shield the charge measurement segment are provided. Two electrometers are provided and from this surface charge density measurement and net charge density measurement on the moving sheet are obtained.