Corrugating system employing controllable steam shower

摘要

The specification discloses a corrugating system comprising corrugating rolls for corrugating a sheet of paper as it is drawn from a roll of paper. Located between the corrugating rollers and the roll of paper is a steam shower which comprises a plurality of separate steam injection means extending across the width of the web of paper for injecting steam onto the sheet of paper as it is drawn from the roll to the corrugating rollers. Separate control means is provided for each steam injection means for separately controlling the injection of steam by each injection means to insure that the sheet of paper, as it leaves the steam shower, has an even distribution of moisture content along its width.