Blanket cylinder slot arrangement

Claim 1

In a clamping and tightening arrangement for a flexible packing in a printing machine, said packing comprising a printing blanket having reinforced clamping edges and an underpacking, the improvement of said arrangement comprising in combination a rotatable blanket cylinder having at least two grooves each of said grooves having an opening in the periphery of said cylinder, said grooves axially extending the entire length of said cylinder, said grooves comprising twO narrow slots of substantially rectangular section in the bottom thereof, the first one of said slots radially extending in said opening in the periphery of said cylinder, the second one of said slots disposed at an angle to said first slot and extending from said opening of said first slot in said periphery of said cylinder, said cylinder having a slanted edge on one side of said opening of said groove, said slanted edge having first and second rounded edges connected by a straight surface to form a contacting ramp, said slanted edge straight surface being substantially in line with the inside wall of said second slot such that said angle between said first and second slots is substantially equal to the angle formed between said slanted edge straight surface and said first radial slots, and a blanket clamping bar having a substantially rectangular section fitted together with said reinforced clamping edge of said blanket and with said underpacking in each one of said slots and means fastening said bar in said slot, said fastening means for each of said slots being substantially identical and interchangeable.