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Capacitive metering means for uniform ribbon feed and take-up mechanism

  • US 4,475,829 A
  • Filed: 04/30/1981
  • Issued: 10/09/1984
  • Est. Priority Date: 04/30/1981
  • Status: Expired due to Term
First Claim
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1. Apparatus for feeding ribbon from a supply reel to a take-up reel, each reel supporting a portion of a fixed inventory of ribbon running from the supply reel to the take-up reel comprisingmeans for driving said take-up reel at selected one of a plurality of different rotational velocities,capacitive means for sensing the portion of said inventory of ribbon on said supply reel and for producing an electrical signal representative of the radius of said portion, andmeans for selecting one of said rotational velocities in response to said signal.

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