Patent ID: 8267847
Filing Date: 2012-09-18
Classification: B26D,B31F,Y10T

Abstract:
1. A method for slitting a continuous corrugated paperboard web to provide longitudinal edge trim slit line to define the lateral outside edge of an output web of a running order, the method comprising the steps of: (1) providing a tool head support structure for transverse tool head movement across the web; (2) mounting a pair of a downstream and an upstream trim slitting tool for selective positioning on said support structure, each slitting tool operable by selective positioning to establish the position of a web edge trim line; (3) positioning the downstream trim slitting tool to plunge into the web to make the edge trim slit for the running order; (4) positioning the upstream trim slitting tool on the line of the edge trim slit for the running order; (5) plunging the upstream trim slitting tool into the edge trim slit line near the end of the running order to operate simultaneously with the downstream trim slitting tool; (6) retracting the downstream trim slitting tool from the running order trim slit prior to the end of the running order; (7) repositioning the downstream trim slitting tool for a new order trim slit line; and, (8) plunging the downstream trim slitting tool into the new order trim slit line at the beginning of the new order; and, (9) retracting the upstream trim slitting tool from the web at the end of the running order.