Marquip, LLC

Kent L Ross

Richard F Paulson

Timothy C Prochnow

David W Dix

Luke A Stout

A roller assembly for supporting a running web of corrugated paperboard in a slitting apparatus includes a pair of rollers which define therebetween a slot for receipt of a rotary slitting blade. The rollers are mounted on separate rotational axes which are angled slightly with respect to one another so that the axially inner edge portions of the rollers where the blade enters the slot therebetween actually engage the blade edge and the diametrically opposite edge portions of the rollers are maximally spaced to define between the adjacent roller faces a downwardly divergent slot. Roller contact with the blade faces helps prevent paperboard adhesive build up and the entry of scrap into the slot. The downwardly divergent shape of the slot allows scrap which does enter therein to be discharged readily with rotation of the rollers. The roller assembly is adapted to be carried with the slitting blade and automatically positioned with the mechanism used to drive and lock the slitting blade in operating position. Each roller assembly is rotatably mounted on its supporting bracket for movement between a maximum blade overlap utilized during repositioning and complete disengagement from the blade as for blade replacement. Spring biased rotational mounting of the roller assembly allows it to be rotated to optimal slitting position under the weight of the moving paperboard web.

Roller assembly for paperboard slitting apparatus

An apparatus for providing longitudinal, laterally spaced slits in a continuously moving sheet or web of corrugated paperboard or the like includes a plurality of upper tool heads each supporting a thin, circular rotary slitting blade. The blades are coaxially mounted and driven by a common drive shaft and each blade-carrying tool head is independently positionable across the width of the paperboard sheet. Each slitting assembly includes a lower tool head or counterhead carrying a roller assembly which supports the underside of the moving board and provides a firm surface to support the board against the upper rotary slitting blade. The roller assembly includes a circumferential radially extending slot in its outer surface through which an edge portion of the upper cutting blade travels with the sheet firmly supported by the roller surfaces on each side of the slot. A blade lubricator is attached to the upper head and applies a thin film of lubricant to the blade edge by direct engagement by a lubricating wick while the blade is rotating. The thin blade is maintained in a sharpened condition by periodic engagement with a rotary sharpening tool pivotally attached to the upper tool head for periodic light sharpening contact with one face of the beveled blade cutting edge.

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Phillips, WI, United States of America

Kent L Ross