Patent ID: 6596108
Filing Date: 2003-07-22
Classification: B29C,B65H

Abstract:
A process for intermittently performing an operation on a web traveling in a machine direction at a substantially constant velocity comprisingproviding a workstation adjacent to said traveling web, said workstation including a device for performing an operation affecting said web intermittently at locations separated along said web in said machine direction, providing first and second roller assemblies displaced from each other and located, in the machine direction, on opposite sides of said work station, said roller assemblies both being in driving contact with said traveling web, intermittently actuating said device to perform said operation on said web at intervals spaced apart in the machine direction, simultaneously shifting said first and second roller assemblies in a direction counter to said machine direction each time said device is actuated while maintaining the overall running speed in said machine direction at a constant velocity, whereby the dwell time is increased for each actuation of said device, and simultaneously shifting said first and second roller assemblies back in the machine direction after completion of each application of said operation.