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Flap folder

  • US 5,440,852 A
  • Filed: 07/21/1993
  • Issued: 08/15/1995
  • Est. Priority Date: 07/21/1993
  • Status: Expired due to Term
First Claim
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1. A flap folder comprising a pair of spaced parallel rails, a carton passage between said rails, a control bar mounted on each of said rails for axial movement relative to its respective rail, means for moving said bars in a first direction downstream of a direction of movement of a carton along said passage during a flap folding operation and then in a second direction opposite to said first direction, a pair of flap folding levers, each said flap folding lever having a first cam means, one of said flap folding levers being mounted on each of said bars, a pair of first cooperating cam means, one of said first cooperating cam means being fixed to each of said rails in a position to engage its adjacent said first cam means when said bars and said levers are moved in said first direction relative to said rails to move each of said levers from a retracted position to a flap folding position and maintain said levers in said folding positions during further movement of said bars in said first direction, and to return said levers to said retracted positions when said bars and said levers are moved relative to their respective said rails in said second direction opposite to said first direction.

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