Abstract: A sheet inserter inserts special insert sheets into a continuous stream of sheets by overlaying the insert sheets with a corresponding sheet in the continuous stream of sheets. The insert sheet overlaying the corresponding sheet in the continuous stream of sheets is then conveyed with the corresponding sheet to a final destination where the sheets can be compiled into a stack. The sheet inserter can be contained in a module which is removably attachable to a document finishing apparatus so as to insert the special insert sheets into the stream of sheets that are output from the document producing apparatus. When the document producing apparatus is associated with a finishing device such as a booklet maker, which compiles and stitches multiple copies of a booklet, the sheet inserter inserts one or more special insert sheets at the appropriate location(s) for each booklet as the sheets are entering the assembly station of the booklet maker.

Abstract: Method and apparatus for applying a periodic negative voltage to a coronode for the prevention of a streaming phenomenon in electrographic devices. A negative polarity voltage signal is applied periodically to the bare wire coronode of a positive corona charging device. The negative polarity voltage signal is believed to prevent the formation of streamer sites associated with the pepper tracking copy quality defect. The negative polarity voltage signal is applied to the coronode in a manner having a minimal effect on charging functions.