Improvements in the Construction of Reciprocating Beds for HIgh Speed Cylinder Printing Presses.

Реферат: 557. Rockstroh, M. Jan. 9. [Patent of Addition to No. 23,111, A.D. 1906.] Cylinder machines with plane printing-surfaces.- Relates to means for reciprocating the beds of cylinder machines, especially such as is described in Specification No. 23,111, A.D. 1906. The point a at which the driving effort is applied, in this case by fluid pressure, is located so that its distance from the centre of gravity of the bed and forme c, and from the plane of contact of the rolling surfaces b, is inversely as the force of inertia at reversal and the forces of friction at the point of contact with the rollers b. It is stated that these forces thus balance one another, and that all tendency of the bed to tilt at high speeds is avoided.