Method and apparatus of measuring a gap between a first and second roll
AssigneeThe Procter & Gamble Company
InventorsCurtis Hunter VanValkenburgh, Jeremy Georges Bertin, Robert George Cox, Jr., Christopher Robert Lyman, Kevin John Schmitz, Jon Richard Rossiter
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Abstract
A method and an apparatus are provided to measure a gap between a first and second roll. Moreover, a method and an apparatus are provided to correct the gap to a target distance with a closed loop system. Also, a method and an apparatus are implemented to detect the wear for each roll by using a non-contacting measuring device.
Claims16
A method of measuring a gap between a first and second roll, wherein the method comprises the steps of:
- providing a first and second roll having parallel axes of rotation, the first roll having a first position and the second roll having a second position, the first roll having a first surface and the second roll having a second surface;
- defining a gap between the first and second roll which meets a target distance between the first and second roll to allow a web material to pass through the gap;
- providing at least a first non-contacting measuring device and which measures a first distance from the first non-contacting measuring device to the first surface to infer the position of the first roll;
- inferring the gap between the first and second roll from the inferred position of the first roll;
- passing the web material between said first and second surfaces for a resulting transformation;
- and
- wherein the first non-contacting measuring device is selected from the group consisting of an inductive sensor, a capacitance sensor, an Eddy-current sensor, a laser triangulation displacement sensor, a confocal-chromatic sensor and combinations thereof.
A method of measuring a gap between a first and second roll, wherein the method comprises the steps of:
- providing a first and second roll having parallel axes of rotation, the first roll having a first position and the second roll having a second position, the first roll having a first surface and the second roll having a second surface;
- defining a gap between the first and second roll which meets a target distance between the first and second roll to allow a web material to pass through the gap;
- providing at least a first non-contacting measuring device and which measures a first distance from the first non-contacting measuring device to the first surface to infer the position of the first roll;
- providing at least a second non-contacting measuring device and which measures a second distance from the second non-contacting measuring device to the second roll to infer the position of the second roll;
- inferring the gap between the first and second roll from the inferred positions of the first and second roll;
- passing the web material between said first and second surfaces for a resulting transformation;
- and
- wherein the first and second non-contacting measuring device are selected from the group consisting of an inductive sensor, a capacitance sensor, an Eddy-current sensor, a laser triangulation displacement sensor, a confocal-chromatic sensor and combinations thereof.
Dependencies are inferred from the claim text.