Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on running web and causing parts thereof to move in opposite directions and in frictional engagement
Registering, tensioning, smoothing or guiding webs longitudinally by retarding devices, e.g. acting on web-roll spindle acting on running web and causing parts thereof to move in opposite directions and in frictional engagement