Apparatus for continuously manufacturing corrugated sheet

Apparatus for continuously manufacturing corrugated sheet, which comprises:

• first and second toothed rolls relatively movably positioned one above the other in a meshed relationship with each other and defining a biting region therebetween for a passage of a web of sheet to be corrugated, said web being imparted with fold lines while passing through the biting region, each of said first and second toothed rolls being spaced from each other and having a plurality of circumferential grooves defined therein so as to extend circumferentially thereof;
• movable first and second guide bar means extending in a direction parallel to a direction of feed of the web of sheet while accommodated within the circumferential grooves in the first and second toothed rolls, respectively, said first and second guide bar means being operable to contact upper and lower surfaces of the web of sheet to guide said web of sheet;
• means for supporting and moving one of the first and second toothed rolls relative to the other of the first and second toothed rolls in a direction towards and away from the other of the first and second toothed rolls;
• and
• means for supporting and moving each of the first and second movable guide bar means towards and away from each other over a distance corresponding to a height of each of teeth of any one of the first and second toothed rolls;
• wherein a movement amount of said one toothed roll relative to said other toothed roll and a movement amount of said first and second guide bars are based on a thickness of the web of sheet to be corrugated and a fold width of the corrugated sheet.