(under subclass 421) Subject matter comprising a detector responsive to one of: (a) the rate of movement of the material or coil, (b) the force exerted to wind or unwind material, or (c) the number of turns of a roll of material or rotatable indicator associated with the material or roll, which detector serves as a material condition input component of the tension regulating system.
SEE OR SEARCH THIS CLASS, SUBCLASS:
334+, for means to control the speed or tension of an information-bearing carrier.
413.9, for a material speed detector in a tension regulating system for a take-up coil.
