Printing unit interrupter for rotary printing presses

Claim 2

A printing unit for rotary printing presses comprising a first wall unit, a second wall unit movable relative to said first wall unit, a third wall unit movable relative to said first and second wall units, a counterimpression cylinder mounted for rotation in said first wall unit, a printing cylinder parallel to said counterimpression cylinder and mounted for rotation in said second wall unit, an inking roller parallel to said impression cylinder and mounted for rotation in said third wall unit, a spindle connecting all said wall units and extending parallel to a line perpendicular to the axes of said impression cylinder and said counterimpression cylinder, first and second threaded portions on said spindle, one of said threaded portions being of a left-hand thread and the other of said threaded portions being of a right-hand thread, a rotatable nut mounted for rotation in each of two of said wall units and cooperating with said first and second threaded portions respectively, means for preventing axial movement of said nuts in their respective one of said two wall units, means for rotating said nuts individually for individual adjustment of said wall units, means for rotating said spindle and means for holding said nuts stationary for simultaneous variation of the relative position of said wall units on rotation of said spindle.

Claim 3

A printing unit for rotary printing presses comprising a first wall unit, a second wall movable relative to said first wall unit, a third wall unit movable relative to said first and second wall units, a printing cylinder, a counterimpression cylinder and an inking roller each mounted for rotation in a respective one of said wall units; a spindle connecting said first and third wall units passing through said second wall unit and extending parallel to a line perpendicular to the axes of said printing cylinder and said counterimpression cylinder, means for preventing axial movement of said spindle relative to said second wall unit, a first nut mounted for rotation in said first wall unit, means for preventing axial movement of said first nut relative to said first wall unit, a second nut mounted for rotation in said third wall unit, means for preventing axial movement of said second nut relative to said third wall unit, first and second threaded portions on said spindle, one of said threaded portions being of a left-hand thread and the other of said threaded portions being of a right-hand thread, said first and second Threaded portions cooperating with said first and second nuts respectively, means for rotating said nuts individually for individual adjustment of the spacing between said first and third wall units and said wall unit, means for rotating said spindle and means for preventing rotation of said first and second nuts for simultaneous variation of the spacing of said first and third wall units and said second wall unit on rotation of said spindle.

Claim 4

A printing unit for rotary printing presses comprising a first wall unit, a second wall movable relative to said first wall unit, a third wall unit movable relative to said first and second wall units, a printing cylinder, a counterimpression cylinder and an inking roller each mounted for rotation in a respective one of said wall units; a spindle connecting said first and third wall units passing through said second wall unit and extending parallel to a line perpendicular to the axes of said printing cylinder and said counterimpression cylinder, means for preventing axial movement of said spindle relative to said second wall unit, a first nut mounted for rotation in said first wall unit, means for preventing axial movement of said first nut relative to said first wall unit, a second nut mounted for rotation in said third wall unit, means for preventing axial movement of said second nut relative to said third wall unit, first and second threaded portions on said spindle, one of said threaded portions being of a left-hand thread and the other of said threaded portions being of a right-hand thread, said first and second Threaded portions cooperating with said first and second nuts respectively, means for rotating said nuts individually for individual adjustment of the spacing between said first and third wall units and said wall unit, means for rotating said spindle and means for preventing rotation of said first and second nuts for simultaneous variation of the spacing of said first and third wall units and said second wall unit on rotation of said spindle.

Claim 5

A printing unit as defined in claim 2, wherein said means for rotating said nuts and said means for preventing rotation of said nuts comprises a worm wheel mounted on each nut and a worm with which it cooperates, said worm serving, when driven, to drive the nuts, but locking the nuts against rotation when it is not driven.

Claim 6

A printing unit as defined in claim 3, wherein each wall unit comprises two wall members between which the cylinders or inking roller are mounted, the spindle being provided running through the wall members at one side of each unit and a second spindle is provided passing through the other wall members of said wall units and coupled to said first spindle, said second spindle cooperating with further worm-driven nuts in said first and third wall units and means being provided for driving connecting the worms associated with each wall unit together for simultaneous drive thereof.