Device for folding print copies

A folder including a device for folding printing copies in a web-fed rotary printing machine, comprising a folding knife, controls for reciprocatingly moving the folding knife at least approximately in one plane, said controls including first and second toggle levers, which, at one of the ends thereof, respectively, are movably attached to frame-fixed parts of the printing machine and at the other ends thereof, respectively, are movably attached to said folding knife, and a rotary element, said rotary element being constructed as a double crank simultaneously actable upon both said first and said second toggle levers for operating said controls.

An assembly including a folder having a longitudinal folding device for forming a second longitudinal fold in printing copies in a transport direction of the printing copies, the folder being preceded by a web-processing web-fed rotary printing machine, and the second longitudinal fold being producible after a cylinder crossfold is formed, the longitudinal folding device comprising a folding knife accepted at two control members and being movable vertically up and down thereby, said folding knife, in a lower position thereof, serving to push printing copies between two driven folding rollers, said two control members being two driven toggle lever pairs disposed between a frame-fixed cross bar and said folding knife, and a rotary element, said rotary element being constructed as a double crank for simultaneously controlling said toggle lever pairs, said double crank being rotatable over one rotation thereof per one stroke of said folding knife.