Fold-off guide for a folder in a paper-processing machine

A folder in a signature-processing machine, comprising:

• a transfer cylinder and a folding cylinder mounted to be rotatable in relative counter-rotation at a substantially equal peripheral speed, and disposed to form a nip having an entry side and an exit side defined by the rotation of said transfer cylinder and said folding cylinder;
• said transfer cylinder being configured to transport a signature with a leading edge and a trailing edge;
• said folding cylinder having a device for taking up the signature at a folding location between the leading edge and the trailing edge, folding the signature at the folding location, and slaving a tail of the signature with the trailing edge and the leading edge away from the transfer cylinder and along with said folding cylinder;
• and
• a fold-off guide disposed at the exit side of said nip, said fold-off guide having a fold-off surface movably disposed for dynamically changing a position of said fold-off surface in synchronicity with a fold-off sequence of each signature.

A folder in a signature-processing machine, comprising:

• a transfer cylinder and a folding cylinder mounted to be rotatable in relative counter-rotation at a substantially equal peripheral speed, and disposed to form a nip having an entry side and an exit side defined by the rotation of said transfer cylinder and said folding cylinder;
• said transfer cylinder being configured to transport a signature with a leading edge and a trailing edge;
• said folding cylinder having a device for taking up the signature at a folding location between the leading edge and the trailing edge, folding the signature at the folding location, and slaving a tail of the signature with the trailing edge and the leading edge away from the transfer cylinder and along with said folding cylinder;
• and
• a fold-off guide disposed at the exit side of said nip, said fold-off guide having a fold-off surface movably disposed for dynamically changing a position of said fold-off surface during a folding operation when a speed of the signature-processing machine changes.