Patents Represented by Attorney George J. Muckenthaler

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  • Voltage compensating driver circuit
    Patent number: 4503480
    Abstract: A voltage compensating driver circuit uses a resistor and a zener diode to remove the effect of potential difference between logic ground and power ground on the comparative function of the circuit and the supply voltage is applied as an input to the comparative function.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: March 5, 1985
    Assignee: NCR Corporation
    Inventors: Ronald D. Pickard, John W. Reece, Joseph W. Racette
  • Dot matrix print head
    Patent number: 4501506
    Abstract: A wire matrix print head includes a generally circular portion for supporting a plurality of electromagnetic actuators and their associated armatures for driving print wires which are supported and guided in a nose portion of the housing a precise distance from a non-printing to a printing position. The print wire support and guide system is assembled separately from the main body of the print head to facilitate the insertion of the print wires.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: February 26, 1985
    Assignee: NCR Corporation
    Inventors: David E. Weeks, John W. Reece, Robert L. Wirth
  • Compact print head
    Patent number: 4485388
    Abstract: A circuit board is utilized to hold a plurality of ink droplet producing elements in compact manner and conductive portions of the board are connected to actuate the elements in pulse-on-demand type printing.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: November 27, 1984
    Assignee: NCR Corporation
    Inventor: Steven P. Sayko
  • Coiled conduits within ink jet reservoir
    Patent number: 4484202
    Abstract: A movable ink reservoir carries a plurality of ink jet printing elements and supplies ink to the elements by means of individual conduits. The individual conduits are coils of tubing arranged in stacked side-by-side manner and the reservoir includes a portion for containing the tubing in such coiled arrangement.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: November 20, 1984
    Assignee: NCR Corporation
    Inventor: Steven P. Sayko
  • Dot matrix print head solenoid assembly
    Patent number: 4484170
    Abstract: A plurality of solenoid bobbins or bobbin wound coils are collectively attached to and supported from one surface of a printed circuit board and the coil wires are securely connected to the conductors on the board.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: November 20, 1984
    Assignee: NCR Corporation
    Inventors: Robert L. Wirth, David E. Weeks, John W. Reece
  • Ink control baffle plates for ink jet printer
    Patent number: 4463362
    Abstract: A movable ink reservoir carries a plurality of ink jet print heads and supplies ink to the heads by means of separate conduits. The reservoir includes baffle means therein formed to provide individual ink tanks for the print heads and to prevent or substantially minimize the sloshing motion of the ink as the reservoir is accelerated and decelerated in printing operation.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: July 31, 1984
    Assignee: NCR Corporation
    Inventor: Jacob E. Thomas
  • Ink level control for ink jet printer
    Patent number: 4462037
    Abstract: The level of ink in a reciprocating reservoir is automatically controlled for both printing and non-printing conditions. The reciprocating motion creates forces to cause the ink to move back and forth between the reciprocating reservoir and a main reservoir and a pump maintains the ink at one level during printing. The pump controls the direction and flow of ink moving between the reservoirs by continuous operation during printing and the ink is allowed to rise in the first-mentioned reservoir during non-printing.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: July 24, 1984
    Assignee: NCR Corporation
    Inventors: Richard G. Bangs, Jacob E. Thomas
  • Control valve for ink jet nozzles
    Patent number: 4460905
    Abstract: The valve mechanism controls the flow of ink from a pressurized ink supply to a plurality of ink nozzles for printing bar codes. The mechanism includes a valve ball and a valve seat and an elastic diaphragm is positioned opposite the valve seat and is movable by action of a spring-loaded magnet armature to move the valve ball against the valve seat.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: July 17, 1984
    Assignee: NCR Corporation
    Inventor: Jacob E. Thomas
  • Temperature control of ink for ink jet printer
    Patent number: 4454518
    Abstract: The ink fluid in a reservoir is heated to establish a temperature differential between the ink fluid therein and the ink flowing through a print head and being ejected therefrom in the form of ink droplets. The temperature differential in the ink tends to reduce or substantially eliminate any air or other type gas bubbles which may be present in the ink fluid at the lower temperature.
    Type: Grant
    Filed: May 12, 1982
    Date of Patent: June 12, 1984
    Assignee: NCR Corporation
    Inventor: Richard G. Bangs
  • Printing solenoid
    Patent number: 4441830
    Abstract: A dot matrix print actuator of low cost and compact rectangular design is constructed of flat, mild steel stock. An armature is engageable with a spring loaded print wire which is guided through a passageway in the poles of the actuator which are on either side of a bobbin containing coil.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: April 10, 1984
    Assignee: NCR Corporation
    Inventor: Victor J. Italiano
  • Projection printer
    Patent number: 4433902
    Abstract: A non-impact printing method wherein pulsed light is transmitted through a mask containing enlarged characters. The characters are optically reduced and are focused on a document in back of a heat-sensitive or thermal magnetic ink ribbon. Heat energy projected by the pulsed light causes ink transfer from the ribbon onto the paper.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: February 28, 1984
    Assignee: NCR Corporation
    Inventors: Miroslav S. Osmera, Ralf M. Brooks, Sung-Soon Kim
  • Ink level control for ink jet printer
    Patent number: 4433341
    Abstract: The level of ink in a reciprocating reservoir is automatically controlled for both printing and non-printing conditions. The reciprocating motion creates forces to cause the ink to move back and forth between the reciprocating reservoir and a main stationary reservoir and to maintain the ink at one level during printing. A check valve controls direction and flow of ink moving between the reservoirs and allows the ink to rise in the first-mentioned reservoir during non-printing.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: February 21, 1984
    Assignee: NCR Corporation
    Inventor: Jacob E. Thomas
  • Teleprinter terminal
    Patent number: 4419736
    Abstract: A teleprinter terminal includes a keyboard and a printer, each of which is operated by means of a self-contained microprocessor, and a third microprocessor is programmed to handle the communications. The three microprocessors are interconnected to operate in a four-bit bus manner wherein communications between the processors is done in bytes but the four-bit bus forces the byte to be transferred in two, four-bit exchanges. One four-bit bus is used to connect the communications processor with the keyboard processor and with the printer processor and a second four-bit bus is used to connect the keyboard processor and the communications processor.
    Type: Grant
    Filed: May 12, 1980
    Date of Patent: December 6, 1983
    Assignee: NCR Corporation
    Inventors: Gay A. Christensen, Gerard Franco, Theron L. Wildey
  • Ink jet print head
    Patent number: 4418356
    Abstract: A cluster or array of ink jet printing elements consisting of two or more inclined rows of tubular transducers are folded or indexed in an interleaf pattern to maintain the nozzles of the transducers in parallel manner for use in a compact print head.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: November 29, 1983
    Assignee: NCR Corporation
    Inventor: John W. Reece
  • Ink control for ink jet printer
    Patent number: 4418353
    Abstract: A short tapered elastomer tube carries ink from a reservoir to an ink jet print head. The tube has a substantially constant inside diameter throughout the length thereof and a decreasing outside diameter along a portion of the length to provide a thin wall section for absorbing return pressure waves generated from the nozzle of the print head.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: November 29, 1983
    Assignee: NCR Corporation
    Inventor: Jacob E. Thomas
  • Multiple nozzle ink jet print head
    Patent number: 4415909
    Abstract: An ink jet printer has an arrangement of nozzles in a symmetrical pattern and formed by tubular ink channels with cylindrical piezoelectric crystal or like transducers surrounding the tubular channels. The arrangement of nozzles is contained in a small and compact package and is capable of serial printing dot matrix characters in columnar manner.
    Type: Grant
    Filed: October 26, 1981
    Date of Patent: November 15, 1983
    Assignee: NCR Corporation
    Inventors: Victor J. Italiano, Steven P. Sayko
  • Ink jet transducer
    Patent number: 4415910
    Abstract: An ink jet transducer operates on pressurized ink which is released on demand by action of an electromagnet operating to unseat a magnetic ball seated on the nozzle. Ink droplets are formed and are caused to travel in a path along the nozzle axis to impact on record media.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: November 15, 1983
    Assignee: NCR Corporation
    Inventor: John W. Reece
  • High speed low temperature diazo processor
    Patent number: 4412731
    Abstract: An improved diazo film processing and developing system has warm-up and steady state heaters along with gravity loading of the film drive rollers and cast aluminum pre-heat and developing chambers. The chambers use resilient or leaf spring seals and a stainless steel aqueous ammonia separation chamber is contiguous and directly connected with the developing chamber for maintaining a temperature differential between the two chambers.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: November 1, 1983
    Assignee: NCR Corporation
    Inventors: Peter E. Herborn, Thomas T. Liu, Sze-Teh Young
  • Ink evaporation prevention means for ink jet print head
    Patent number: 4412233
    Abstract: An ink-carrying conduit connected between an ink reservoir and a print head is placed within an enclosure for a portion of its length and which enclosure is an extension of the reservoir in large tubular form to contain the conduit in an ink vapor atmosphere.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: October 25, 1983
    Assignee: NCR Corporation
    Inventors: Jacob E. Thomas, James K. McKnight
  • Reloadable ribbon cassette
    Patent number: 4397574
    Abstract: A ribbon cassette is fastened on one side of a printer and is operator reloadable. The endless ribbon is loaded in coil form and is driven from the cassette in a path past the printing station of the printer and back into the cassette where it assumes a random form corresponding to a stuffing type cassette.
    Type: Grant
    Filed: August 7, 1981
    Date of Patent: August 9, 1983
    Assignee: NCR Corporation
    Inventor: Gary A. Wojdyla