Abstract: A print head has a plurality of linearly arranged, spaced apart print elements. The print head is positioned in a printing assembly at an angle to the process path of the print receiving documents. The angle of the print head is preselected whereby the distance between adjacent print elements in the direction orthogonal to the process direction is a preselected print resolution. The print head is then operated whereby the print elements fire multiple times as the document moves the preselected print resolution beneath the print head.

Abstract: A hybrid printing system adds color accents to documents produced by high speed black on white printers using wax based inks. The color indicia is printed while the moving documents are supported against a curved surface and the documents are heated to an appropriate temperature for use of a wax based ink between black printing and color accent printing.

Abstract: A printer for adding accent colors to preprinted documents includes a transport which defines a curvilinear path along which the documents move during the printing of the accent colors thereon. The printing is accomplished through the use of multiple print heads which discharge wax based ink through multiple jets. The documents to which the accent colors are to be added are edge justified and then released in timed sequence to the curved transport path which leads through a printing zone defined by the print heads.

Abstract: The print head of an electrographic printer is cleaned electrostatically. The printhead has a number of electrodes in an electrode array, which cooperate with a dielectric belt. Periodically, printing with the printer is interrupted (e.g. after every 100 pages of printing, or about every minute), and then substantially all of the electrodes are energized at the same time for a time period sufficient to effect burning off of contaminants from the electrodes (e.g. about the time it takes to print four pages, or about 3 seconds). A host computer controls the operation of the printer components. The printer developer unit may be moved away from the dielectric belt prior to the energization of all of the electrodes to effect cleaning.

Abstract: In electrographic printing apparatus, a charge transfer endless-loop dielectric belt including a conductive member to effect a ground plant is supported to tension with an unsupported portion thereof disposed opposite the electrodes of the print head. The unsupported portion results from belt engagement with the printhead in regions adjacent to the electrodes to provide the desired electrode/dielectric belt spacing.

Abstract: An electronic music system includes a voltage controlled tone generator, or synthesizer, and an input device, in the form of a guitar or other fretted stringed instrument and associated electronic circuitry, for sequentially providing voltage signals, selected from a set of discretely different voltage levels each analogously related to a musical tone, for driving the tone generator. Each string-fret pair of the stringed instrument is assigned a given musical tone, preferably in accordance with normal tuning of the instrument, and means are provided for producing a corresponding voltage when a string-fret pair is closed by pressing the string against the fret. When two or more string-fret pairs are simultaneously closed, the output voltage corresponding to the highest frequency musical tone associated with the closed string-fret pairs is produced.