Patent ID: 6921450
Filing Date: 2005-07-26
Classification: B31F,Y10T

Abstract:
1. An apparatus for forming a single face corrugated paperboard web from a liner web and a corrugated medium web, the medium web being corrugated on a heated fluted bonding roll and having starch based adhesive glue lines applied to the flute tips while said medium web remains on said bonding roll, a generator roll for bringing the liner web into initial tangent contact with the glue lines on the flute tips of the corrugated medium on the bonding roll without nipping contact to form a composite single face web on said bonding roll, the improvement comprising: a contact roll having an axis of rotation parallel to the rotational axis of the bonding roll and mounted closely spaced from and immediately downstream of the generator roll to lightly press the single face web against the bonding roll with a radial force distributed uniformly across the width of the single face web to spread the adhesive glue lines between the flute tips and the liner before gelatinization of the adhesive.