PAPER AND PAPERBOARD WEB SLITTING APPARATUS AND METHOD

摘要

A paper or paperboard web slitting apparatus of the type utilizing a thin high speed rotary slitting blade (24) extending through the web and into a slotted anvil or web supporting surface (34, 72) on the opposite side of the web is adapted to provide effective plunge slitting while maintaining a desirable narrow blade-receiving slot in the supporting surface. The web supporting surface (34, 72) may comprise either a slotted roller assembly (34) or a stationary slotted plate (72), either of which includes a mechanism (47, 78) for allowing the repositioned rotary cutting blade to plunge into an initially widened slot which is subsequently closed laterally toward the opposite faces of the cutting blade, resulting in a narrow blade-receiving slot, the edges of which are either closely spaced from or in light sliding contact with the opposite faces of the slitting blade.