Web and transfer cutoff apparatus

Abstract

A web rewind unit includes a turret with spaced spindles and cores for receiving the web. A slide is mounted on the turret beneath the web moving over the core at the winding station. A knife bracket is pivotally secured to the slide. A power cylinder positions the slide between a web cut position and a retracted position. A pivot unit connects between the knife bracket and the main cylinder unit. A pneumatic cylinder loads the pivot unit. A stop unit is mounted to the machine frame and includes an adjustable member for establishing angular orientation of the cutting knife to accurately locate the knife with respect to the web during the cutting action. An air bar is mounted above the web path and moves down through the web as the knife pivots. The free web end of the web moves into the new core. The air bar includes a cam which engages a cam roller on the bracket and pivots the knife to cut the web. The timing is preferably such that as the knife moves to the cutting position, the air bar cylinder is operated and the cam coupled to the knife bracket is engaged by the pivoting air bar and the knife blade pivots and moves through the web. The air bar moves through the web in a direction opposite the knife. The air blast drives the free end of the web downwardly into a guide about the new core.