Patent ID: 6733432
Filing Date: 2004-05-11
Classification: B31F,Y10T

Abstract:
A single facer apparatus for forming a single face corrugated web comprising:a large diameter fluted corrugating roll and a small diameter fluted corrugating roll positioned with parallel roll axes such that flutes on the small diameter corrugating roll are loaded against and mesh with flutes on the large diameter corrugating roll to form a corrugating nip therebetween, wherein a ratio of the diameters of the large diameter fluted corrugating roll to the small diameter fluted corrugating roll is at least 3:1; and a backing arrangement in engagement with the small diameter corrugating roll to apply pressure on the small diameter corrugating roll and in turn apply pressure along the corrugating nip; wherein the small diameter corrugating roll comprises a resilient tubular member that deflects locally in the vicinity of the corrugating nip as flutes on the small diameter corrugating roll impact flutes on the large diameter corrugating roll, thereby cushioning impact throughout the corrugating nip.