Corrugating machine

In a corrugated board making machine comprising apparatus for the forming of a corrugated web consisting of upper and lower liners and a pre-corrugated medium sandwiched between and bonded to the liners and wherein the upper liner and corrugated medium are first bonded together prior to passage through a gluing section for the adhesive coating by a primary adhesive applying means of the yet exposed flutes of the corrugated medium preliminary to passage to a double backer section for entrainment with and bonding to the lower liner, the improvement adapted expressly for and operative only in such machine downtime situations as where a length of the forming web carrying a section of yet exposed flutes of the corrugated medium and charge of adhesive is exposed while stopped in transit before entrainment with and bonding to the lower liner with a resultant drying of the adhesive charge and comprising:

• a supplemental adhesive applying means disposed transversely of the forming web and between the lower liner and the corrugated medium inboard of their point of joinder for spraying a controlled shower of adhesive in the nip, and timing means rendering the shower operative for an interval commencing only upon machine start up following a down time situation and until the newly glued portion of the corrugated medium arrives at the nip.