Rotary offset printing press with cylinder interrupter

Claim 1

An offset printing press comprising: a. a plate roller and a blanket roller; b. supporting shafts extending axially from each said plate roller and blanket roller; c. a frame for supporting said plate roller; d. a slot formed to extend generally horizontally within said frame for receiving the support shaft associated with said plate roller; e. said slot having a length being at least as great as the diameter of the shaft supporting said plate roller; f. means for holding the shaft supporting said plate roller in a fixed position within said slot; g. a pair of upwardly extending arms pivotally mounted on said frame and provided at the free ends thereof with means for releasably supporting the shaft supporting said blanket roller to facilitate the changing of said blanket roller; h. said blanket roller being journaled for rotation by adjustable bearing means mounted at the free ends of said pair of upwardly extending arms; i. gear drive means associated with said upwardly extending arms for pivoting said blanket roller from a plate roller engaging position to an outer plate roller disengaged position in response to the application of torque to said gear drive means; j. said gear drive means being further operable to precision adjust and then to lock said arm in a desired position; k. a fixed inking roller journaled within said frame for rotation about a stationary axis disposed parallel with and above the axis of said plate roller; l. at least one adjustable inking roller engageable with both said fixed inking roller and said plate roller; and m. gear means for revolving said adjustable inking roller along an arc of constant radius about said stationary axis of said fixed inking from a plate roller engaging position to a plate roller disengaged position while maintaining contact between said adjustable inking roller and said fixed inking roller.