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Vacuum system for combination fold-off control

  • US 4,666,139 A
  • Filed: 10/21/1985
  • Issued: 05/19/1987
  • Est. Priority Date: 10/21/1985
  • Status: Expired due to Fees
First Claim
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1. A signature folder comprising drive means to move at least a portion of a signature first in one direction and then in a reverse direction, guide means adjacent to said portion when it reverses direction, and vacuum means operable to create a vacuum between said guide means and signature portion operating to move said portion toward said guide means to prevent tail whipping when said portion reverses in direction, said guide means including a rotatable roll connected to a vacuum source, said roll being freely rotated by engagement with said signature portion.

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