51
David D Thornburg, Brian Rosen: Capacitance controlled keyswitch. Xerox Corporation, Serge Abend, September 8, 1981: US04288836 (9 worldwide citation)

A tri-state capacitance controlled keyswitch having a deformable concave electrode moveable by means of an actuator toward and away from a pair of capacitor plates underlying a dielectric layer in order to change the capacitive coupling between the capacitor plates. The electrode is normally remote ...


52
Hsing C Tuan, Malcolm J Thompson: Ion projection copier. Xerox Corporation, Serge Abend, February 24, 1987: US04646163 (9 worldwide citation)

A fluid jet assisted ion projection copier including a marking head incorporating an array of thin film ion modulating electrodes and photosensors integrated upon a single substrate. An optical projection system places incremental images of light and dark areas from an original to be copied onto the ...


53
Gene F Day, Lloyd D Clark: Ion projection copier. Xerox Corporation, Serge Abend, May 27, 1986: US04591885 (8 worldwide citation)

An ionographic copier based upon the fluid jet assisted ion projection electrographic marking process. A light sensitive ion modulation assembly is used for controlling the flow of ions in accordance with dark and light patterns of raster line optical information projected from an original to be cop ...


54
Andrew Gabor: Closed loop velocity control system for a movable element. Xerox Corporation, Barry Paul Smith, Serge Abend, May 4, 1982: US04328450 (8 worldwide citation)

Apparatus is disclosed for controlling the movement of a movable element between an initial starting position and a final stopping position. The apparatus comprises drive means coupled to the movable element and responsive to motor drive signals for moving the movable element along a predefined path ...


55
Harold S Foster: Ribbon cartridge with pivotable ribbon guide arms. Xerox Corporation, Serge Abend, March 1, 1988: US04728207 (7 worldwide citation)

A ribbon cartridge having a pair of movable arms extending outwardly from the body, over which the ribbon passes on its transit from an internal ribbon supply to an internal used ribbon storage. Each of the arms is supported for movement about an oblique axis which moves the active marking portion o ...


56
David M Mayer: Apparatus for automatically spooling output media from an electrographic printer. Xerox Corporation, Serge Abend, October 29, 1991: US05060880 (7 worldwide citation)

Apparatus for automatically spooling output media from a printer including a web supply of recording medium, a generally circular baffle arrangement for directing the recording medium into a tubular form, a drive roller for bidirectionally driving the recording medium into an out of the generally ci ...


57
Leo Levinson: Cassette sheet feed apparatus. Xerox Corporation, Serge Abend, September 10, 1985: US04540169 (7 worldwide citation)

An improved sheet feeding apparatus for use in printers, typewriters, facsimile equipment and copying machines. The apparatus comprises a cassette loading system wherein the cassette may be automatically loaded into operative position, and locked therein, in a sequence of two substantially transvers ...


58
Hsing C Tuan, Malcolm J Thompson: Electrographic ion writing head driver system. Xerox Corporation, Serge Abend, January 12, 1988: US04719481 (7 worldwide citation)

A thin film writing head for recording information upon a record medium by means of a continuous writing process. The writing head comprises thin film elements including marking elements, high and low voltage bus lines, driver circuitry, and switching elements, integrally fabricated upon a large are ...


59
Richard L Weisfield, Leonard E Fennell, Hsing C Tuan: Modulation electrodes having improved corrosion resistance. Serge Abend, October 18, 1988: US04779107 (7 worldwide citation)

A marking array for use in an ionographic marking apparatus in which the ion modulation structure is subject to a lighly corrosive atmosphere. Improved marking electrodes are provided which comprise a thin film body of a conductive material having a surface which is chemically neutral to the corona ...


60
Andrew Gabor, John C Dunfield, George W Bowers Jr, Richard G Crystal: Impact mechanism for quiet impact printer. Xerox Corporation, Serge Abend, April 12, 1988: US04737043 (6 worldwide citation)

An impact mechanism for an improved serial impact printer for delivering a printing force to drive a character element against a platen by means of a print tip movable toward and away from the platen. The print tip is supported upon a carriage mounted upon the printer for reciprocating movement in a ...