Back to results
US 2020/0039172 A1Published application
Method and apparatus for fluting a web in the machine direction
AssigneeHbk Family, LLC
InventorHerbert B. Kohler
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHbk Family, LLC
InventorHerbert B. Kohler
Estimating the term…
A forming device for gathering the width of a traveling web is disclosed. The forming device includes opposing arrays of flute-forming bars that can be interlaced to define therebetween a longitudinal flute-forming labyrinth effective to reduce the width of a web traveling therethrough by a preselected take-up ratio. The flute-forming bars are curved beginning at an entry end of the forming device such that they converge in a lateral direction as they proceed in the machine direction. In this manner, individual elements of the web traveling between the respective arrays in the machine direction follow contour lines along the curved bars or between adjacent ones of the curved bars so that no such element crosses any flute-forming bar in the cross-machine direction as the web travels and is fluted. A corrugating die for introducing a near-net shape to the intermediate-fluted web is also disclosed, as are a corrugating line incorporating these operations and methods for its operation.
A forming device having an entry end and an exit end spaced apart along a machine direction, the forming device comprising a plurality of flute-forming bars extending from adjacent the entry end toward the exit end, wherein the plurality of flute-forming bars are configured to gradually and uniformly introduce into a web of medium material an array of longitudinal flutes as the web travels along a web-travel pathway in the machine direction.
A corrugating die having an entry end and an exit end spaced apart along a machine direction, the die comprising a continuous smooth first forming surface having a first sinus contour viewed in lateral cross-section adjacent the entry end, the first forming surface smoothly evolving in the machine direction to a second sinus contour viewed in lateral cross-section adjacent the exit end, the first sinus contour having a larger amplitude and lower frequency than the second sinus contour.
Dependencies are inferred from the claim text.