Abstract: A system for determining the location of an edge of a sheet of media for alignment purposes utilizes a beam of light directed at the media surface to produce a reflected light beam. The reflected light beam intensity varies in response to the reflectivity of the surface on which it impinges and the beam position shifts in accordance with the datum of the surface at which the reflected beam is originated. By monitoring both intensity and positional information of the reflected beam as it is scanned across the media edge, the edge location can be determined using a weighted combination of the intensity and positional information.

Abstract: A flexographic press of conventional design is used to print on a container, with the container to be printed upon replacing the web and the impression roll of the conventional press. In order to maintain the registration between the print stations, the container is placed into a carrier and stays registered to the carrier until all colors are printed. The carrier is moved between the different print stations and is registered to each print station independently. All print stations are set up to print in exactly the same place relative to the carrier, thus registration is achieved.

Abstract: The present invention provides a modular bit holder which stores and displays a single bit, and can be linked with other such bit holders to form a variable set. A bit is inserted in one end of the holder and is held in place by a flange. To remove the bit, a second bit is forced into the holder, displacing the first bit to a holding position from which it can be removed. Each holder has means along either side of it to removably attach it in side-by-side fashion to another similar holder.