Patent ID: 7153253

Claim:
A folding drum of a folder comprising: a support; at least one folding element on said support; a rotatable shaft of said support and having a support shaft axis of rotation; a gear unit on said support; a first central gear wheel having a first central gear wheel axis of rotation and being arranged in said gear unit coaxially with respect to said support shaft axis of rotation; means for shifting said first central gear wheel axially between at least first and second positions; a second central gear wheel having a second central gear wheel axis of rotation and being arranged in said gear unit coaxially with respect to said support shaft axis of rotation and said first central gear wheel axis of rotation; complementary tooth arrangements on end faces of said first and second central gear wheels; and means for selectively displacing said first central gear wheel axially with respect to said second central gear wheel to selectively bring said complimentary end face tooth arrangements into engagement in said first position and out of engagement in said second position.