Plate changing device and assembly

Plate changing device comprising a roller disposed parallel to a plate cylinder having a plate lock-up device, positioning means for pressing the roller against the plate cylinder and for inserting a rear edge of a printing plate into said plate lock-up device, and guide means extending in a direction in which the rear edge of the printing plate is insertable in said plate lock-up device and displaceably supporting said roller at ends thereof, said guide means comprising a pair of guides secured to a machine frame, said positioning means comprising two positioning elements firmly connected to said machine frame and supporting said roller at each of said ends thereof, respectively, a pair of displaceable bearings respectively holding said roller in said pair of guides, said roller being removable from said bearings, said bearings having displaceable supports at said machine frame for absorbing axial forces of said roller.

Plate changing device comprising a roller disposed parallel to a plate cylinder having a plate lock-up device, positioning means for pressing the roller against the plate cylinder and for inserting a rear edge of a printing plate into said plate lock-up device, and guide means extending in a direction in which the rear edge of the printing plate is insertable in said plate lock-up device and displaceably supporting said roller at ends thereof, said guide means comprising a pair of guides secured to a machine frame, said positioning means comprising two positioning elements firmly connected to said machine frame and supporting said roller at each of said ends thereof, respectively, a pair of displaceable bearings respectively holding said roller in said pair of guides, said roller being removable from said bearings, and including respective bushings displaceable by said positioning elements, said bearings being disposed in said bushings, said bushings being displaceable along said guides radially to the plate cylinder.

Plate changing device comprising a roller disposed parallel to a plate cylinder having a plate lock-up device, positioning means for pressing the roller against the plate cylinder and for inserting a rear edge of a printing plate into said plate lock-up device, and guide means extending in a direction in which the rear edge of the printing plate is insertable in said plate lock-up device and displaceably supporting said roller at ends thereof, said guide means comprising a pair of guides secured to a machine frame, said positioning means comprising two positioning elements firmly connected to said machine frame and supporting said roller at each of said ends thereof, respectively, a pair of displaceable bearings respectively holding said roller in said pair of guides, said roller being removable from said bearings, said roller being formed of an inner and an outer tube, said inner tube receiving therein part of said bearings, and roller bearings supporting said outer tube on said inner tube.