Rotary press with web-tensioning roll means

Claim 1

A rotary press of the offset or process engraving type comprising a plurality of printing units through which a paper web is fed in direct succession, each of said units comprising a power-driven blanket cylinder and a cooperating impression cylinder mounted for free rotation and driven by frictional engagement with the paper web passing in the nip between the blanket cylinder and the impression cylinder with an entering tension T1, a tension control cylinder to which the paper web is directed directly downstream of said blanket cylinder and impression cylinder said web contacting said tension control cylinder only on the downstream side of said nip and means for driving said tension control cylinder from said impression cylinder at a circumferential speed which is constantly proportional to and slightly lower than that of said impression cylinder so that the tension T2 of the paper web between said tension control cylinder and said blanket cylinder is slightly lower than said tension T1, thereby avoiding beating of said impression cylinder.