Single facer with small intermediate corrugating roll
AssigneeMarquip, Inc.
InventorCarl R. Marschke
Life of this patent
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Abstract
The labyrinth path in the corrugating nip of a single facer is substantially reduced by utilizing a small diameter intermediate corrugating roll captured between a pair of larger diameter conventional corrugating rolls. The two large diameter rolls capture the smaller roll and prevent bending thereof under corrugating loads. The corrugator may be operated at high speeds without the adverse increase in labyrinth path and web tension characteristic of large diameter corrugating rolls.
Claims7
In a single facer apparatus for producing a single face corrugated web, including a pair of fluted main corrugating rolls rotatable on parallel spaced roll axes with flutes of the same shape and pitch adapted to inter-engage to form a corrugating nip for a paper machine web, means rotatably mounting said main corrugating rolls to impose a corrugating nip force normal to the roll axes generally in the plane common thereto, the improvement comprising:
- an intermediate fluted corrugating roll mounted between and in rotatable engagement with said main corrugating rolls and with the axis of said intermediate roll lying generally in said common plane;
- and,
- said intermediate roll forming with one main corrugating roll the corrugating nip and having a diameter sufficiently smaller than the diameter of said one main corrugating roll to provide a reduction in the labyrinth paper path sufficient to prevent rupture of the medium web.
Dependencies are inferred from the claim text.