Device and method for calibrating a non-destructive sheet strength measuring system
AssigneeMeasurex Corporation
InventorsPaul J. Houghton, John D. Goss, Mathew G. Boissevain
Life of this patent
Estimating the term…
Abstract
A running blade is adapted to move at the same speed as a continuously running sheet and to generate a burst perforation through the sheet. The force exerted by the blade against the sheet is measured and used to calibrate a non-destructive sheet strength sensor.
Claims10
A device for determining a physical characteristic of a material, said physical characteristic being related to the force required to puncture the material, the device comprising:
- a rotatable wheel having a peripheral surface adapted to contact said material;
- a blade mounted to protrude from the periphery of the wheel, said blade being fully retractable into the wheel;
- and
- a force sensor operatively associated with said blade for generating a signal indicative of the force exerted by said blade when the blade punctures the material.
A device for determining a physical characteristic of a material, said physical characteristic being related to the force required to puncture the material, the device comprising:
- a rotatable wheel having a peripheral surface adapted to contact said material;
- at least one blade mounted on the wheel, said at least one blade having a first position relative to the wheel in which a portion of said at least one blade projects from the peripheral surface of the wheel, and a second position in which said at least one blade is fully retracted relative to the peripheral surface;
- and
- a force transducer operatively associated with said at least one blade for generating a signal indicative of the force exerted by said blade in puncturing said material when said blade is in said first position.
Dependencies are inferred from the claim text.