Abstract: A glue applicating means is constructed with an elongated shoe floatingly mounted alongside of and urged toward a glue applicator roll by a fluid controlled biasing means. A longitudinally extending depression in the shoe is substantially closed by the glue roll to define a glue cavity to which glue is fed by a positive displacement pump. The shoe is mounted so that the downstream end of the shoe is movable away from the glue roll automatically as required to permit glue to exit from the cavity at the same rate it is supplied thereto. This provides what is effectively a self-adjusting nozzle or metering slot extending the full length of the shoe and through which glue is forced from the cavity to form a thin layer of uniform thickness on the outside of the glue roll.

Abstract: A method for producing corrugated board utilizes a glue applying means constructed with an elongated shoe floatingly mounted alongside of and urged toward a glue applicator roll by a fluid controlled biasing means. A longitudinally extending depression in the shoe is substantially closed by the glue roll to define a glue cavity to which glue is fed by a positive displacement pump. The shoe is mounted so that the downstream end of the shoe is movable away from the glue roll automatically as required to permit glue to exit from the cavity at the same rate it is supplied thereto. This provides what is effectively a self-adjusting nozzle or fluid distribution slot extending the full length of the shoe and through which glue is forced from the cavity to form a thin layer of uniform thickness on the outside of the glue roll. The latter applies such thin layer of glue directly to the flute tip of a corrugated web for joining a liner web to the corrugated web.

Abstract: In a single facer having split blades for stripping a corrugated medium from one of the corrugating rolls and then guiding the corrugated medium to a pressure nip where a liner is applied thereto, the blade sections are biased toward the corrugating medium by a single spring which acts through blade holding cranks so constructed that retracting the upstream blade section against the force of the biasing spring automatically retracts the downstream blade section against the force of the biasing spring thereby minimizing interference between the downstream blade section and a thickened web portion.