Abstract: An internal drum printing plate plotter is disclosed. The plotter provides a smooth path for a printing plate from an input location to a plotting location to an output location. The plotter includes a partially cylindrical drum and a loading tray associated with the drum at one end thereof. The drum covers at least 180 degrees of curvature and has an internal surface and the loading tray and the internal surface define the smooth path.

Abstract: There is provided a core lamination for electromagnetic devices. The lamination comprises an open, substantially C-shaped frame having inwardly pointing end portions facing one another across a gap, and a central limb of a substantially rectangular shape, tightly insertable with its width into the gap between the end portions. When thus inserted, the central limb defines the space enclosed by the frame two window-like openings, each of which has a height-to-width ratio of about 3:1. The shapes and relative dimensions of the open frame and the central limb are such that they are capable of interlocking and of fully tesselating a surface delimited by two parallel edges.