METHOD AND APPARATUS FOR UNWINDING A ROLL OF WEB MATERIAL

摘要

An apparatus and method for unwinding a roll (10) of web material (11) are disclosed herein. The web material (12) is unwound from the roll (10) and the machine direction of motion of the web is altered without creating a problematic span of web material. A value analogous to the tension of the web material is determined. The speed of the web is adjusted according to the analog of the tension of the web. The apparatus can comprise an unwind stand (100) to rotate the roll, and a means for altering the direction of travel of the web material. The apparatus further comprises a means to determine an analog of the web material tension and a means of controlling the speed of the web according to the analog of the web tension. The web material is routed to a downstream process.