Apparatus for producing corrugated board

Claim 1

IN CORRUGATED BOARD-PRODUCING APPARATUS COMPRISING COOPERATING CORRUGATING ROLLS ADAPTED TO CORRUGATE CELLULOSIC MEDIA FED THEREBETWEEN, AND MEANS FOR FEEDING TO SAID ROLLS CELLULOSIC MEDIA TO BE CORRUGATED THEREBY, THE IMPROVEMENT COMPRISING, IN COMBINATION, (A) MEANS FOR DIRECTING A STREAM OF WET STEAM AGAINST SAID CELLULOSIC MEDIA PRIOR TO PASSAGE BETWEEN SAID ROLLS, (B) AN OPEN-TOP CONTAINER DISPOSED IMMEDIATELY SUBJACENT AT LEAST ONE OF SAID ROLLS AND EXTENDING PARALLEL TO THE AXIS OF THE ROLL FOR SUBSTANTIALLY THE ENTIRE LENGTH OF SAID ROLL, (C) A PLURALITY OF SPACED-APART NOZZLES DISPOSED OVER SAID CONTAINER AND ALIGNED TO SPRAY AN AQUEOUS LIQUID ALKALI METAL SILICATE ONTO A CORRUGATED CELLULOSIC SHEET TRAVELING ON SAID ROLL, (D) SAID NOZZLES BEING PIVOTALLY MOUNTED TO PERMIT DISPLACEMENT FROM THEIR POSITION ALIGNED TO SPRAY ONTO SAID CORRGUATED SHEET, TO A POSITION TO PERMIT DIPPING SAID NOZZLES INTO A BODY OF LIQUID SOLVENT FOR SAID SILICATE IN SAID CONTAINER.