Patents Represented by Attorney George J. Muckenthaler

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  • Multiple nozzle ink jet print head
    Patent number: 4387383
    Abstract: A print head includes a plurality of liquid droplet producing devices in an arrangement wherein the piezoelectric elements are in direct contact with the liquid. The piezo elements are pulsed on demand to cause rapid volume change in the compression chamber to initiate pressure waves therein and to eject ink droplets from the nozzles of the print head.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: June 7, 1983
    Assignee: NCR Corporation
    Inventor: Steven P. Sayko
  • Low ink indication for ink jet print head
    Patent number: 4380772
    Abstract: A visual indication of low ink supply wherein a soluble-dye fluid is added to the ink supply and floats on the surface of the ink. The low ink supply is indicated by a change in color printed on the record media by reason of the indicating fluid having different characteristics from the printing ink.
    Type: Grant
    Filed: December 24, 1981
    Date of Patent: April 19, 1983
    Assignee: NCR Corporation
    Inventor: Victor J. Italiano
  • Ink jet print head with tilting nozzle
    Patent number: 4376944
    Abstract: In ink jet printing, the ink droplets formed at the nozzle of the print head are selectively guided by tilting the nozzle against a resilient portion of the print head and relative to the normal ink droplet propelling direction. The tilting movement is accomplished by an electromagnet or by using conductive wires operably associated with permanent magnet plates in an arrangement such that the pivot of the tilting movement is located at the center of the orifice through the nozzle.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: March 15, 1983
    Assignee: NCR Corporation
    Inventors: Peter H. Reitberger, Wilhelm Ruprich
  • Ink jet print head
    Patent number: 4376284
    Abstract: An ink jet print head has a plurality of nozzles arranged in a vertical line at the printing end and connected by respective ink channels to pressure cavities in a circular arrangement at the ink supply end. The pressure cavities are supplied from an intermediate chamber contained in the print head and formed in a thin elongated shape and positioned generally in a plane parallel with the line of the nozzles. The construction of the print head compensates for acceleration and deceleration forces which are induced in the ink due to movement of the print head in the horizontal direction or perpendicular to the plane of the nozzles.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: March 8, 1983
    Inventors: Leonhard Bader, Frank Giessner, Helmut Weber
  • Ink jet printer drive means
    Patent number: 4354197
    Abstract: The ink in an ink jet printer is accelerated by means of cylindrically-shaped electromagnetically energized pressure waves wherein plates of metal serve as electrodes between which a capacitor is discharged. The capacitor along with the resistance losses and the inductance of the leads represent a damped oscillating circuit to reduce the back pressure waves. Other means of damping include a soft hose having an exponentially shaped portion, porous material in a passageway between a pair of air chambers, and a plastic foil placed between the pressure wave drive means and the nozzle.
    Type: Grant
    Filed: October 3, 1980
    Date of Patent: October 12, 1982
    Assignee: NCR Corporation
    Inventor: Peter H. Reitberger
  • Method and apparatus for ink jet printing
    Patent number: 4345259
    Abstract: The ink in a continuous moving stream is caused to be deflected at a point inside the closed ink system by means of timely short pulses to effect the printing operation wherein only deflected ink in the form of ink droplets are ejected through the nozzle. The speed of the ejected droplets depends upon the speed of the continuously-flowing ink and not on the energy of the deflection pulse.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: August 17, 1982
    Assignee: NCR Corporation
    Inventor: Peter H. Reitberger
  • Nozzle plate for ink jet print head
    Patent number: 4343013
    Abstract: The nozzle plate of an ink jet print head is made of glass to provide a desirable wetting property for a stable meniscus of the ink column and the front surface of the plate is coated with a non-wetting material such as metal or plastic to prevent ink deposits at the front surface around the orifice. Any ink deposits at such front surface would adversely affect the ejection of ink droplets.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: August 3, 1982
    Assignee: NCR Corporation
    Inventors: Leonhard Bader, Frank Giessner, Friedrich B. Rombach, Hermann Winter
  • Optical sensing of wire matrix printers
    Patent number: 4339208
    Abstract: An optical sensor is provided for each print wire of a print head and includes two glass fibers to carry light from a light-emitting diode to the surface of a record medium and to carry the reflected light to a photodiode. Each printed dot is detected and the sensor output is compared with a delayed or stored print signal which is applied to the drivers for the print wires.
    Type: Grant
    Filed: September 25, 1980
    Date of Patent: July 13, 1982
    Assignee: NCR Corporation
    Inventor: Horst H. Biedermann
  • Optical sensing of ink jet printing
    Patent number: 4328504
    Abstract: Printing of characters in non-impact manner by means of ink droplets which are driven through the nozzle of an inking device is optically sensed and the existence, the position, the size and the condition of each ink spot or mark are determined. The desired printing signals are generated and input in a signal shaping circuit and these signals are compared with the actual signals from the optical sensor and the ink droplet drive means is changed or altered to correct the printing.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: May 4, 1982
    Assignee: NCR Corporation
    Inventors: Helmut Weber, Peter H. Reitberger
  • Valve for ink jet printer
    Patent number: 4323907
    Abstract: A valve member is positioned in an ink cavity carried by a bidirectionally movable print head and is operable to open and close the inlet and the outlet of the cavity to minimize fluctuations of the ink due to acceleration and deceleration of the print head.
    Type: Grant
    Filed: January 2, 1980
    Date of Patent: April 6, 1982
    Assignee: NCR Corporation
    Inventor: Victor J. Italiano
  • Ink droplet sensing means
    Patent number: 4323905
    Abstract: An ink droplet sensing means for detecting whether or not droplets are impinging on record media during ink jet printing operations. A synthetic foil having a metal layer is placed over a counter electrode having a rough surface on one side and a voltage is then applied to the electrode and the metal layer. Ink droplets impinging on the foil momentarily deflect the foil and cause a change in capacity which in turn causes a voltage change at the electrode. The voltage change is coupled through a capacitor and an amplifier and through recognition logic for evaluation of the signals.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: April 6, 1982
    Assignee: NCR Corporation
    Inventors: Peter H. Reitberger, Helmut Weber
  • Imaging and scanning system
    Patent number: 4317004
    Abstract: A sheet of optical fibers, circular at one end thereof and unfurled at the other end to form a straight line, is used to transmit laser-emitted light through a rotating prism and onto a photosensitive surface for electrophotographic printing or copying.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: February 23, 1982
    Assignee: NCR Corporation
    Inventor: John W. Reece
  • Low energy impact printer
    Patent number: 4308795
    Abstract: The action of a rotatable cam assembly positions a plurality of type racks, enables printing and indexes paper prior to restoring the type racks to the home position. Teeth on the cam assembly engage teeth on the type racks for positioning thereof and an extended tooth on the cam assembly causes impact of the racks against a platen which is caused to be rotated by movement of the cam assembly to index the paper to the next print line.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: January 5, 1982
    Assignee: NCR Corporation
    Inventors: David C. Wills, Raymond L. Lawter, Barry D. Briggs, Edward F. Sampson
  • Document sorting method
    Patent number: 4295206
    Abstract: A document sorting process utilizes existing or natural incoming sequences of documents each of which includes a sort key code thereon and which are sequentially arranged in accordance with a trace, locate and retrieve number (TLR). The documents are machine-sorted by the sort key code in numerical sequence and the corresponding trace, locate and retrieve number is checked for ascending or descending order. Whenever the trace, locate and retrieve number is seen in ascending order, the created sort number remains the same, whereas on a descending record the sort number is incremented by one digit. A reduction in the number of sort numbers reduces the passes required for physically sorting the documents.
    Type: Grant
    Filed: June 6, 1979
    Date of Patent: October 13, 1981
    Assignee: NCR Canada Ltd.-NCR Canada Ltee
    Inventors: John D. Cain, Gary C. Lovie
  • Valve for ink jet printer
    Patent number: 4287523
    Abstract: A rotary ink jet printer has an ink supply in a rotating reservoir wherein a major portion of the ink supply is isolated from the ink feed system during the printing operation. A cylindrical reservoir has a central cavity and a surrounding or outer cavity connected by an orifice opened and closed by means of a ball valve to control the flow of ink or ink supply from the central cavity to the outer cavity.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: September 1, 1981
    Assignee: NCR Corporation
    Inventors: Jacob E. Thomas, Victor J. Italiano
  • Quick change lens mount
    Patent number: 4281895
    Abstract: A mounting for an objective or projection-type lens has a male bayonet with beveled lugs engageable with a recess in a female bayonet plate and a one-piece spring is attached to the female plate and applies clamping force against the lugs of the male bayonet and also against the recessed shoulders of the female plate to provide for rapid changing of the lens and to maintain the lens in precise focal position.
    Type: Grant
    Filed: April 12, 1979
    Date of Patent: August 4, 1981
    Assignee: Quantor Corporation
    Inventor: Siegfried H. Mohr
  • Quick change lens system
    Patent number: 4266855
    Abstract: A lens nesting member carries a plurality of lenses in position to enable rapid selection of a desired lens and photoelectric means is provided for sensing and for identifying the desired lens.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: May 12, 1981
    Assignee: Quantor Corporation
    Inventor: Siegfried H. Mohr
  • Artificial tree or similar article
    Patent number: D262097
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: December 1, 1981
    Assignee: George J. Muckenthaler
    Inventor: Louis H. Weixelman
  • Ribbon cassette or similar article
    Patent number: D266256
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: September 21, 1982
    Assignee: NCR Corporation
    Inventor: Michael O. Grey
  • Ribbon cassette with bi-color capability
    Patent number: RE31117
    Abstract: A ribbon cassette having a body portion and a nose portion which pivots with respect to the body portion to obtain bi-color printing capability. The cassette also includes hinges and a fracturable member interconnecting the body portion and the nose portion. The fracturable member retains the nose portion in fixed relationship with respect to the body portion; however, upon removing the fracturable member, the nose portion is free to pivot between first and second positions with respect to the body portion and thereby present first and second colors of inked ribbon to an associated print means.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: January 4, 1983
    Assignee: NCR Corporation
    Inventor: Noel F. Depew