Various embodiments are directed to a yarn analyzer comprising a measurement mechanism configured to monitor the local thickness of the yarn moving along a yarn path. The measurement mechanism comprises a fixed member and a displaceable member between which the yarn path passes. The displaceable member is secured relative to a mechanical amplifier comprising a pivotable lever arm at a first end of the pivotable lever arm at a short distance from the pivot axis of the lever arm, and is biased toward the fixed member. The measurement mechanism further comprises a displacement sensor configured to monitor the displacement of a reference component secured relative to a second end of the lever arm at a long distance from the pivot axis. The monitored movement of the reference component is correlated with the thickness of the yarn, such that the yarn thickness is recorded for the length of yarn.

The invention relates to a casting apparatus for the production of a cast sheet of homogenized tobacco material, said casting system comprising a casting box adapted to contain a slurry of the homogenized tobacco material; a movable support; a casting system adapted to deposit the slurry contained in the casting box onto the movable support so as to form the cast sheet; a sensor to detect a thickness of the cast sheet; wherein the sensor includes a slider comprising a planar surface adapted to be in contact to a top surface of the cast sheet and a height detector adapted to measure the height of the planar surface so as to derive the thickness of the cast sheet. The invention also relates to a method to measure the thickness of a homogenized tobacco sheet.

A method for roll-forming a tubular member is provided. The method includes providing a roll-forming machine having a pair of rollers and a forming roller adjacent the pair of rollers. Further, cutting a strip of sheet metal to form a segment having free leading and trailing ends extending between a predetermined length; feeding the segment between the pair rollers; calculating the thickness of the segment via feedback from the pair of rollers; automatically adjusting the position of the forming roller in response to the determined thickness of the segment; advancing the segment between the pair of rollers and against the forming roller to form an annulus; and forming a weld joint between the free ends.

A device for identifying thickness of a sheet-like medium and method thereof are provided. The device includes: a frame, a thickness shaft, a floating shaft and a sensor; where: both ends of the thickness shaft are arranged on the two lateral plates of the frame via bearings; both ends of the floating shaft are arranged on the two lateral plates of the frame via bearings and an outer surface of the floating shaft is tangently contacted with an outer surface of the thickness shaft; and the sensor is arranged on the facade of the frame, and configured to detect an amplitude of a point of tangency where the floating shaft is tangent to the thickness shaft.

A paper sheet handling apparatus includes: a displacement amount detector that includes a pressing part intended to press a paper sheet against a transporting face of a paper sheet transporting path and having an initial position at which the pressing part is not in contact with the transporting face of the paper sheet transporting path, the displacement amount detector detecting a displacement amount of displacement of the pressing part from the initial position in a direction perpendicular to the transporting face, the pressing part being displaced according to a thickness of a paper sheet passing between the transporting face and the pressing part; a reference displacement amount storage; a paper sheet thickness storage; and a tape thickness threshold storage.

The present disclosure relates to a method for calibrating a stationary THz measuring device which measures geometric properties of a profile by means of one or more THz sensors during an extrusion of the profile, comprising at least one or more steps.

A device (20) for characterizing a tire (10) in terms of uniformity comprises: a frame (22), a rotary support (24) mounted with the ability to rotate relative to the frame (22) and on which the tire (10) is placed and which is intended to be set in rotation at low speed, at least two geometric measuring members (28a, 28b) secured to the frame (22) and positioned respectively in such a way as to measure the internal geometry and the external geometry of the tire (10) simultaneously as the rotary support (24) rotates, a measuring member (29) for measuring the angular position of the rotary support (24) secured to the frame (22), and an electronic control unit (30) configured to retrieve the variations in the internal and external geometry of the tire for each angular position of the rotary support.

A method for determining the thickness of a material strip (5) when feeding the material strip (5) to the processing zone of a machine tool (1). The material strip (5) is clamped between two rotatable rollers (3, 4), whose relative position to each other in the original state with clean rollers and zero roller spacing was detected (reference relative position) and whose relative position to each other in the intended feed operation is determined for each feed interval (current relative position). The difference between the current relative position and the reference relative position, which gives the thickness of the strip material (5) when the rollers are clean in their original state, is corrected according to the invention for any changes in diameter of the rollers (3, 4) that may have occurred, for example, due to contamination. For this purpose, in the original state with clean rollers (3, 4) in a reference feed operation, an assigned reference angle of rotation of the roller (3) is additionally detected for at least one of the rollers (3) at a detected reference feed length, so that the original ratio of feed length/angle of rotation for this roller (3) is known and thus its original diameter is also clearly defined. If there are deviations from these parameters during the intended feed operation, the deviations are converted into a diameter change of the at least one roller (3) and taken into account in the calculation of the thickness of the material strip (5). The invention makes it possible to solve today's problems in strip thickness measurements with rollers.