Patent ID: 7448424

Claim:
A corrugated paper bonding device comprising: a primary corrugated roller; a surface corrugated roller mounted under said primary corrugated roller; a core sheet fed through between said primary corrugated roller and said surface corrugated roller; a paste application roller applying a layer of paste on a surface of said core sheet; an adjusting mechanism including a first, a second and a third rollers and an endless band mounted around said rollers, said first roller serving as a tension roller, and said second and third rollers serving as pressurizing rollers, said first roller and said third roller being supported by a swing arm, said swing arm having an extendible member for changing distance between second and third rollers to adjust tension, said swing arm being supported by an elevating device so that said elevating device can move said swing arm to change position of said swing arm with respect to said primary corrugated roller, a surface sheet located above said paste application and fed through between said adjusting mechanism and said primary corrugated roller; wherein said band is put to surface contact with said surface sheet within an angular range determined by position of said swing arm with respect to said primary corrugated roller by operating said elevating device to selectively position said swing arm with respect to said primary corrugated roller, thereby pressurizing area between said surface sheet and said core sheet can be adjusted to provide pressurization between said surface sheet and said core sheet with no surface damage or fracture to said surface sheet.