Patent ID: 6149751
Filing Date: 2000-11-21
Classification: B31F,Y10T

Abstract:
An apparatus for forming a single face corrugated paperboard web from a liner web and a corrugated medium web by corrugating, gluing, joining and bonding the component webs on a common roll, said apparatus comprising:a large diameter rotary fluted bonding roll forming a corrugating nip with a small diameter fluted corrugating roll, said large diameter bonding roll carrying the corrugated medium web from the nip;means for applying a starch adhesive to the exposed flute tips of said corrugated medium web on the bonding roll;means for joining the liner web with the medium web on the bonding roll without nipping pressure to create uncured adhesive glue lines between the liner and said exposed flute tips;means for heating said bonding roll to heat the web to a bonding temperature of at least 200.degree. F.;means for adjustably wrapping the glued single face web around more than half of the circumference of the bonding roll surface downstream of the point of joining the liner web with the medium web sufficient to permit substantially complete formation of green bonds in said adhesive glue lines; and,said wrapping means being operative to limit radial pressure applied to the web to that induced by web tension.