US 4,756,245 AGranted

Printing press having various printing heads

OwnerYvan Rochinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A self-standing printing apparatus is described which includes a paper feeder for feeding individual sheets of paper, an impression cylinder and an accessory shaft adjacent the impression cylinder on which various types of printing heads may be mounted, including a numbering device. A counter roller may also be provided adjacent the impression cylinder for perforating the paper against perforating strips which may be provided on the surface of the impression cylinder. The impression cylinder is adapted to move out of contact with the various printing heads on the accessory shaft and the counter roller when the paper supply is interrupted. As the paper supply is reinstated, the impression cylinder automatically moves back into position. A particular paper supply and transfer device is also described as well as a novel inking unit. A stacking plate for stacking the printed sheets along with jogger devices are provided.

A printing apparatus for letterpress work comprising a frame, an impression cylinder mounted for rotation on the frame, means for feeding sheets of paper to the impression cylinder, means provided on the impression cylinder for successively retaining the sheets of paper on the surface of the impression cylinder as the latter rotates through a predetermined arc, a shaft mounted on the frame in spaced relation and parallel to the axis of rotation of the impression cylinder and contained within said arc, driving means for driving said impression cylinder and said shaft in registry, a group of printing elements including a numbering device, a letter press head and a flexographic printing cylinder;

means for releasably mounting said printing elements on said shaft such that said printing elements contact said impression cylinder surface within said arc, removable ink means including at least an ink roller positioned for directly contacting and transferring printing ink to the printing elements on said shaft, a perforation strip releasably carried on the surface of the impression cylinder, and a counter roller mounted on the frame adjacent the impression cylinder within said predetermined arc and driven by said driving means to press a sheet of paper on the impression cylinder passing through said arc against the perforation strip, in order to perforate the sheet of paper, said printing elements and said counter roller all concurrently actuatable upon rotation of said impression cylinder, so that said printing elements and perforating strip can accomplish their respective printing and perforating functions on the sheet retained on said impression cylinder, anyone of said printing elements and said perforating strip attachable to said shaft and impression cylinder, respectively, so that one or more of said printing elements and perforated strip can accomplish its function, and means for removing the sheet of paper from the imprssion cylinder at the end of said predetermined arc.

Abstract

Claims11