Patent ID: 6016860
Filing Date: 2000-01-25
Classification: B31F

Abstract:
Apparatus for forming corrugated paperboard of the kind in which two corrugated mediums are joined at their flute tips without an intervening liner comprising:two register rolls for ensuring that the mediums are brought into precise flute tip to flute tip alignment for bonding,dependent electric motors to drive the register rolls in which one roll is driven by a reference motor and the second motor register roll is driven by a follower motor, each of said dependent electric motors having a drive motor shaft which is an extension of the roll body for its associated register roll so that precise flute tip to flute tip alignment is maintained,location sensing devices associated with each register roll to measure a value related to the location of a position on the periphery of each register roll, andcontrol means which compares the measured values for each register roll and if necessary adjusts the voltage or current of the follower motor to maintain alignment of the flute tips of the two mediums.