Take-out/take-up tension control apparatus
OwnerHiroshi Kataokainventor
Life of this patent
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Abstract
A sheet winding apparatus comprises a take-out roller provided with a tension controller and adapted to take out a sheet stretched by a stretching unit so that uniform tension is applied to the sheet over its entire width, a dancer roller provided with a drive control mechanism and adapted to properly control the take-up tension in the sheet being taken out and wind the sheet on a take-up reel.
Claims2
A take-out tension control apparatus for controlling tension in a film or sheet, the film or sheet being fed out from a stretching device for stretching a film or sheet to a predetermined thickness by holding the opposite ends of the film or sheet with clips, said take-out tension control apparatus comprising:
- a take-out roller for taking out the film or sheet having been released from the clips;
- a motor for driving said take-out roller;
- tension detecting roller means for detecting tension in a portion of the film or sheet disposed between the stretching device and said take-out roller;
- a speed detector for detecting the line speed of the stretching device;
- and
- control means for receiving a tension value detected by said tension detecting roller means and a line speed value detected by said speed detector and transmitting an optimum drive value to said motor.
Dependencies are inferred from the claim text.