Patent ID: 8038150
Filing Date: 2011-10-18
Classification: B65H

Abstract:
1. A method of measuring a thickness of a sheet being conveyed on a transport path, comprising: rotating a substantially cylindrical reference surface disposed in the transport path; engaging a probe with the reference surface to determine a runout value for each of a set of positions along a circumference of the reference surface; controlling the rotation of the reference surface and engagement of the probe by a controller operatively connected to a processing device; conveying the sheet on the transport path so that the sheet contacts the reference surface at one position of the set; engaging the probe with the sheet at the one position to determine a measured sheet thickness value; storing the runout value for each of the set of positions along the circumference of the reference surface in a database on the processing device; and adjusting the measured sheet thickness value based on the runout value for the one position to obtain an actual sheet thickness value by adding the runout value to the measured sheet thickness where the runout value is negative; and subtracting the runout value from the measured sheet thickness where the runout value is positive.