Corrugating machine glue applicator
AssigneeWestvaco Corporation
InventorWillem A. Nikkel
Life of this patent
Estimating the term…
Abstract
In the fabrication of double-faced corrugated paperboard, the exposed flute tips of single-faced corrugated board are prepared with a coating of liquid adhesive to receive a second liner web. To press the flute tips uniformly against the adhesive film coated surface of a glue applicator roll, pressure is applied by a segmented air bearing wherein multiple air bearing shoe segments are resiliently secured to a common manifold air source.
Claims8
In combination with an apparatus for continuously applying a second facing web to an exposed face plane of corrugated flute tips on a continuously produced line of single-faced corrugated paperboard, a glue station having an adhesive applicator roll for applying adhesive to said exposed, corrugated flute tips, said glue station including backing force means for exerting a force bias on said single-faced production line to press said exposed flute tips substantially radially against the length of said adhesive applicator roll, said backing force means comprising air manifold means secured in a position proximate of said glue station to extend substantially parallel with a rotational axis of said roll, the improvement comprising a plurality of air bearing shoes aligned along the length of said applicator roll to apply said force bias against said single-faced production line, independent resilient positioning means respective to each air bearing shoe for laterally and longitudinally confining the location of each shoe and conduit means respective to each of said shoes for applying pressurized air thereto from said air manifold means.
A method of applying a second liner web to a moving web of single-faced corrugated paperboard having an exposed, corrugated surface and a smooth surface, said method comprising the steps of:
- (a) routing flute tip elements of said corrugated surface into a line contact with an adhesive coated surface of a rotating glue applicator roll;
- (b) positioning a plurality of air bearing shoe elements proximately of said smooth surface along said line of contact;
- (c) resiliently biasing each of said shoe elements, independently of other said shoe elements, toward said smooth surface;
- and,
- (d) providing a sufficient air flow between each of said shoe elements and said smooth surface to support said shoe elements from normal contact with said smooth surface against the force of said resilient bias.
Dependencies are inferred from the claim text.