Single facer having rapid roll changing means

A single facer for manufacturing single-faced corrugated board comprising a frame having a base supporting a pair of transversely spaced side frames between which are disposed an upper corrugating roll, a lower corrugating roll meshing with the upper corrugating roll, a pressure roll for contact with the lower corrugating roll and an adhesive applying device arranged near the lower corrugating roll, characterized by means permitting one or more of said rolls to be lowered and removed from the single facer and replaced by substitute rolls in a relatively short period of time, said means including

• (a) an interior opening formed within each side frame adjacent the base for removal of the corrugating and pressure rolls,
• (b) support means mounted on the side frames for releasably supporting the rolls adjacent the openings, said support means including releasing means operative to release said rolls to permit said rolls to be lowered for removal through the openings,
• (c) support means for movably supporting the adhesive applying device on the frame with capacity to enable the adhesive applying device to move toward or away from the lower corrugating roll and
• (d) actuating means connected to the adhesive applying device, said actuating means being operative to retract the adhesive applying device from the lower corrugating roll a distance sufficient to provide clearance adjacent the openings in the side frames to permit removal of the corrugating and pressure rolls.