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Inertial system for detecting foreign objects between contra-rotating rolls

  • US 6,637,179 B2
  • Filed: 12/20/2001
  • Issued: 10/28/2003
  • Est. Priority Date: 12/20/2001
  • Status: Expired due to Term
First Claim
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1. Apparatus for detecting the presence of a substantially non-compressible foreign object between contra-rotating, substantially parallel and opposing rotating rolls, the apparatus comprising:

  • a first rotating rolls, rotatable on a shaft supported by a frame;

    a second rotating roll which is displaceable relative to the first roll for adjusting the spacing therebetween; and

    wherein the first and second contra-rotating rolls are oriented one above the other;

    microswitch, mounted for displacement with the second rotating roll, and having an inertially activated lever pivotally mounted for actuating the microswitch at a predetermined level of acceleration for emitting a signal when said acceleration of the second rotating roll and microswitch exceeds a predetermined level of acceleration said signal being indicative of the presence of a foreign object between the first and second rolls; and

    means for stopping the rotation of at least one of the first and second rolls upon said signal indicating the presence of a foreign object between the first and second rolls.

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