Winder speed control apparatus
AssigneeGraphic Packaging Corporation
InventorJames W. Ditto
Life of this patent
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Abstract
A speed control assembly for a rotatable web winding apparatus comprising a dancer engaged with a web of material wound about the winder apparatus for displaceably responding within a predetermined range of dancer positions to tension variations in the web; a first control signal generating device for generating a first control signal in response to dancer displacement from a predetermined centered position, the ratio of dancer displacement to the first control signal being variable over the range of dancer displacement positions; and a dancer response rotation control device for rotationally accelerating the winding apparatus in response to the first control signal.
Claims18
Apparatus for controlling the rotational speed of a spool having a web of material wound thereon comprising:
- dancer means in contact with a portion of said web of material between said spool and an operating station;
- mounting means for mounting said dancer means for movement in linear directions in response to the tension in said portion of said web of material;
- dancer signal generating means for generating a dancer signal which has an intensity that is proportionate to the amount of displacement of said dancer means from a center position;
- control signal generating means having at least a first electric circuit and a second electric circuit;
- said first electric circuit being responsive to at least a portion of all intensities of said dancer signal;
- said second electric circuit being response to intensities of said dancer signal above a first predetermined intensity;
- said first electric circuit generating a first control signal and said second electric circuit generating a second control signal;
- said first control signal having an intensity that varies in response to said dancer signal along a first linear direction having a predetermined slope and said second control signal having an intensity that varies in response to said dance signal along at least a second linear direction having a slope greater than said predetermined slope;
- and
- said first or said second control signal controlling the rotational speed of said spool.
Dependencies are inferred from the claim text.