Semi-corrugated paperboard panels and method for production of same
AssigneeSemi Corr Containers, Inc.
InventorJames Alan Cummings
Life of this patent
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Abstract
A means of making a multi ply structural panel by eliminating the top liner in the corrugating process. The present invention is made possible through modification to the corrugating rolls of the singlefacer. The design modification to the rolls involves incorporation of slots that run around the circumference of one roll and mating creasing tools incorporated around the circumference of the other of the corrugated roll set. These slots and creasing tools are incorporated across the existing flutes of the corrugating rolls.
Claims15
A paperboard product comprising:
- a creased base layer of medium or liner paper wherein the creased base layer is comprised of
- a fluted web of a first flute type having opposed tips directed in a downward direction and upward direction, respectively;
- and
- multiple machine direction cross flute bond lines extended in-line at intervals across the fluted web and directed in the downward direction.
A corrugated roll product comprising:
- a pair of semi corrugated board corrugating rolls wherein
- at least one of the rolls contains a series of parallel slots extending circumferentially around the roll and across the normal flutes of the roll and the slots are spaced at intervals;
- and
- an other of the at least one of the rolls having creasing tools embedded circumferentially around the roll and across normal flutes of the roll with the tools positioned to mate with the slots in the at least one roll.
A singlefacer product comprising:
- a corrugated singlefacer containing a pair of corrugating rolls
- wherein at least one roll is a standard corrugating roll and an other of the at least one roll is a slotted corrugating roll with slots extending circumferentially around the roll and across normal flutes of the roll with the slots spaced at intervals;
- and
- an independent creasing roll holding cross corrugator circumferentially mounted creasing tools with the tools positioned to mesh with the parallel slots in the slotted corrugating roll;
- wherein an independent creasing roll is positioned to mesh with the slotted corrugating roll downstream of a point of flute formation.
Dependencies are inferred from the claim text.