Peter J Leas

6397014, May 28, 2002

Jun 1, 2000

09/585524

Peter J. Leas - Penfield NY

Heidelberg Digital L.L.C. - Rochester NY

G03G 1500

399 11, 399 9

An optical device for indicating the position of a flexible web in a machine. The device is mounted in a fixed bracket and a collimated beam is reflected from the web onto a screen to produce a visible light spot. The location of the light spot on the screen is directly related to the position of the web.

6628121, Sep 30, 2003

Oct 13, 2000

09/687501

Peter J. Leas - Penfield NY
Kenneth P. Friedrich - Honeoye NY
Gerald M. Darby - Brockport NY

Heidelberger Druckmaschinen AG - Heidelberg

G01R 2912

324457, 324458, 399 9

An apparatus is provided for determining the response of an electrometer used in an electrophotographic recording apparatus. The apparatus includes a movable base disposed adjacent said electrometer. The base includes a non-conductive material. A conductive pattern is disposed on the base. The conductive pattern is electrically connected to a variable power supply. A motor moves or drives the base past the electrometer. The motor is controlled by a motor control to vary the speed of movement of said base. A method is also provided for determining the response of an electrometer used in an electrophotographic recording apparatus. An electrometer to be tested is selected and the operational parameters of the electrometer are dynamically tested.