Roll Weight System for On Machine Dynamic Verification

A method of operating a sheet making system that produces a continuous sheet that travels in the machine direction which comprises:

• (a) forming a sheet of material that contains a liquid;
• (b) determining the basis weight of the sheet of material;
• (c) reeling the traveling sheet of material into a roll;
• (d) calculating the weight of the sheet material in the roll using basis weights determined in step (b) to yield an estimate weight;
• and
• (e) weighing the roll to determine the actual weight of the sheet of material in the roll.

An apparatus for determining the gross weight of sheet material on a roll that comprises:

• a spool that is equipped with a radio frequency identification (RFID) tag to identify its tare weight and/or its spool identification number wherein the spool is configured to wind the sheet of material;
• means for lifting a roll of material that is wound on the spool and comprises a sensor configured to sense a force produced by the roll of material when lifted and transmitting wireless signals that include information representative of the force produced by the roll of material;
• and
• means for calculating the gross weight of the sheet of material wound on the roll.