(under subclass 419) Subject matter wherein the means to apply a retarding force against the running material is regulated in response to a detector actuated by a change in the radial dimension of a roll of material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
334.5, for a coil diameter sensor for regulating the speed or tension in an information-bearing carrier.
413.2, for a take-up coil diameter sensor for regulating the tension being wound onto the coil.
421.2, for a supply coil diameter sensor for regulating a supply coil brake.
