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US 8,672,825 B2Granted
Apparatus for producing corrugated board
AssigneeHbk Family, LLC
InventorHerbert B. Kohler
Life of this patent
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AssigneeHbk Family, LLC
InventorHerbert B. Kohler
Estimating the term…
An apparatus is provided for producing longitudinally corrugated product. The apparatus includes a guide roll for guiding a web of medium material, wherein at least a portion of the guide roll is adapted to be arranged at an angle relative to another portion of the guide roll. The apparatus further includes a plurality of flute forming bars oriented generally along a longitudinal axis of the web to define a first corrugating labyrinth effective to longitudinally corrugate the web to an intermediate geometry. The apparatus further includes a pair of corrugating rollers that cooperate to define, at a nip therebetween, a second corrugating labyrinth effective to longitudinally corrugate the web to a substantially final geometry. The apparatus further includes a web travel pathway for the web that follows a path around a portion of the guide roll, through the first corrugating labyrinth, and through the second corrugating labyrinth.
An apparatus for producing a longitudinally corrugated product, including a first set of flute forming bars and a second, opposing set of flute forming bars, said first and second sets of flute forming bars together defining a first corrugating labyrinth effective to introduce longitudinal corrugations in a web traveling therethrough along a web travel pathway in a machine direction, wherein a pair of adjacent flute forming bars in each of said first and second sets thereof approach one another along said web-travel pathway in the machine direction, said flute forming bars comprising openings in respective surfaces thereof configured to emit a fluid for supporting a web traveling through said first corrugating labyrinth at a distance spaced from said surfaces.
An apparatus for producing a longitudinally corrugated product, including a first set of flute forming bars and a second, opposing set of flute forming bars, said first and second sets of flute forming bars being interdigitated along partial lengths thereof to define a first corrugating labyrinth effective to introduce longitudinal corrugations in a web traveling therethrough along a web travel pathway in a machine direction, wherein a degree of interdigitation between said first and second sets of flute forming bars is adjustable adjacent an exit end of said first corrugating labyrinth into a range of fixed relative positions to thereby define respective predetermined lateral take-up widths for the web of medium material, said flute forming bars comprising openings in respective surfaces thereof configured to emit a fluid for supporting a web traveling through said first corrugating labyrinth at a distance spaced from said surfaces.
Dependencies are inferred from the claim text.