Patent ID: 6311754
Filing Date: 2001-11-06
Classification: B31F,Y10T

Abstract:
In a single facer apparatus for producing a single face corrugated web, including first and second fluted corrugating rolls rotatable on parallel spaced roll axes with flutes adapted to interengage to form a corrugating nip for a paper web, means rotatably mounting said first and second corrugating rolls to impose a corrugating nip force normal first and second corrugating to the roll axes generally in the plane common thereto, the improvement comprising:said first corrugating roll having a diameter sufficiently smaller than the diameter of said second corrugating roll to provide a reduction in the labyrinth paper path sufficient to prevent rupture of a medium web; and,a plurality of backing roll means in operative rotatable engagement with said first corrugating roll for applying a backing force to said first corrugating roll sufficient to provide the nip force and to restrain the first corrugating roll against deflection, said plurality of backing roll means each independently supported to impose the backing force along substantially the full axial length of said first corrugating roll.