Brake for paper roll bearing shaft in paper roll support frame of web feeder for rotary press

A brake system for paper roll bearing shafts in a rotatably supported support frame of a web feed for a rotary press, which support frame includes at least two pairs of radial paper roll support arms each with a paper roll bearing shaft rotatably supported therebetween, said frame being rotatable for successively advancing said support arms to a paper feeding first position, a web pasting second position, a paper roll loading third position locating the now-loaded paper roll in position for repeat cycling, said brake system comprising a pneumatic brake on said support frame and individually associated with each paper roll bearing shaft, a pneumatic circuit for feeding compressed air to each of said pneumatic brakes, a plurality of solenoid valves on said support frame and connected in said pneumatic circuit and respectively associated with each of said pneumatic brakes for individually controlling the operation of said brakes, and solenoid valve switching means on said support frame for selectively and individually operating each solenoid valve according to a turning phase of each paper roll support arm, said switching means comprising actuation means for simultaneously energizing two of said solenoid valves during a web pasting operation to maintain tension on spliced webs from two paper rolls mounted on said respective bearing shafts and support arms located with a brake operating zone extending to and between said web pasting second position and said paper feeding first position.