Paper web threading apparatus for rotary printing press

A paper web threading apparatus for a rotary printing press for threading a paper web through a paper web threading path extending from a paper web supply section through a printing section and to and through a paper folding section therein for conducting printing on the paper web, said paper web threading apparatus comprising:

• a guide path provided along and laterally of the paper web threading path, said guide path being branched into a plurality of paths at a plurality of spaced branch positions of said paper web along said threading path and to and through said paper folding section;
• a paper web guiding member comprising a continuously flexible, deformable belt-shaped member of a predetermined length which is flexible in a lateral direction, said paper web guiding member having a guided and engaging portion for engagement with and securing a guided end of said paper web;
• a plurality of guiding member moving and driving means for moving the paper web guiding member along the guide path, said plurality of guiding member moving and driving means provided along said guide path and at regular intervals shorter than said predetermined length of said paper web guiding member, each of said guiding member moving and driving means including a driver means and a driving member driven by the driver means and meshing with the paper web guiding member;
• and
• a plurality of guide path change-over means, provided at each of said spaced branched positions, for selectively changing direction of advancement of said paper web guiding member to a direction of each of said spaced branch positions and at said paper folding section for changing direction of said paper web guide members through said paper folding section as said paper web is folded, wherein said plurality of guide path change-over means includes a plurality of turning bars for changing the direction of advancement of said paper web guiding member in a lateral direction.