Apparatus for producing a corrugated product
AssigneeIntpro, LLC
InventorHerbert B. Kohler
Life of this patent
Estimating the term…
Abstract
An apparatus for introducing transverse trapezoidal corrugations into a traveling web is provided, and includes a plurality of corrugating rollers for imparting corrugations to the web. In disclosed embodiments four such rollers are provided in a roller train defining respective first, second and third nips therebetween, wherein the teeth of the first and second rollers have rounded distal faces and those of the third and fourth rollers have flattened distal faces. Methods of yielding a trapezoidal corrugated web also are disclosed.
Claims28
An apparatus for producing a corrugated product, comprising:
- a roller train comprising:
- a first corrugating roller having a first set of corrugating teeth,
- a second corrugating roller having a second set of corrugating teeth,
- a third corrugating roller having a third set of corrugating teeth, and
- a fourth corrugating roller having a fourth set of corrugating teeth;
- a first nip defined between said first and second corrugating rollers opposing one another;
- a second nip defined between said second and third corrugating rollers opposing one another;
- and
- a third nip defined between said third and fourth corrugating rollers opposing one another;
- each tooth in each of said first, second, third and fourth sets of teeth comprising a distal face, a leading flank and a trailing flank, the distal faces of each of said first and second sets of teeth being rounded, the distal faces of each of said third and fourth sets of teeth being flattened relative to the distal faces of each of said first and second sets of teeth.
A method of introducing trapezoidal corrugations to a traveling web, comprising:
- feeding the web through a first nip defined between first and second corrugating rollers having respective first and second sets of teeth that oppose one another in said first nip, said web following a first path through said first nip tangent to respective edges of the opposing teeth therein;
- thereafter feeding said web through a second nip defined between said second corrugating roller and a third corrugating roller, the third corrugating roller having a third set of teeth that opposes said second set of teeth in said second nip, said web following a second path through said second nip tangent to respective edges of the second set of teeth and discretely folding over respective edges of said third set of teeth therein;
- and
- thereafter feeding said web through a third nip defined between said third corrugating roller and a fourth corrugating roller, the fourth corrugating roller having a fourth set of teeth that opposes said third set of teeth in said third nip, said web following a third path through said third nip discretely folding over respective edges of the third set of teeth and fourth set of teeth therein,
- said web emerging from said third nip possessing a substantially fully trapezoidal corrugated conformation.
Dependencies are inferred from the claim text.