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Interfolding method of sheet material and machine for carrying out such method

  • US 6,228,014 B1
  • Filed: 08/19/1999
  • Issued: 05/08/2001
  • Est. Priority Date: 08/21/1998
  • Status: Expired due to Term
First Claim
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1. A method for production of a stack of interfolded sheets comprising the steps of:

  • feeding of sheets in succession on folding rollers that comprise means for selectively holding the sheets on their surface so that a sequence of offset sheets is created;

    alternately holding the sheets by means of folding rollers downstream of their point of contact in order to obtain an interfolded disposition; and

    , folding and formation of said stack of interfolded sheets by the use of folding arms each pivoting about a pivot which is located within a respective groove formed within the periphery of each of said folding rollers and pushing away alternatively the partially overlapped portions of sheets in succession that adhere to said rollers onto a stack formed below.

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