Patents Examined by Linda M. Peco
  • Patent number: 4746930
    Abstract: In a thermal head used in a printer, a rod-shaped mounting member carries heating elements thereon. The mounting member is formed of a metal material, and the heating elements are arranged over the peripheral surface of the mounting member with an insulating material interposed. Excess heat accumulated in the heating elements is quickly transmitted to the mounting member and diffused.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: May 24, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Shimazaki, Kunihiko Miura
  • Patent number: 4737859
    Abstract: A method and an apparatus are disclosed for producing in a bi-level recording device a composite record from visually distinguishable images by means of a logical EXOR operation calculated on the binary representations of either of said images.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: April 12, 1988
    Assignee: Agfa-Gevaert, N.V.
    Inventor: Jean A. Van Daele
  • Patent number: 4736183
    Abstract: A composite sintered oxide resistor comprising crystal grains of zinc oxide and crystal grains of a zinc oxide compound of other metal or semi-metal element than zinc, and a grain boundary layer having an electric resistance equal to or lower than that of the crystal grains and which of zinc oxide between the individual crystal grains has a very large withstanding capacity against switch surge, a small non-linear coefficient of voltage in the voltage-current characteristics, a positive, smaller resistance-temperature coefficient, and a small percent change in resistivity after heat treatment at 500.degree. C. in the atmosphere.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: April 5, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Takeo Yamazaki, Satoru Ogihara, Tetsuo Kosugi, Shingo Shirakawa, Shinichi Owada
  • Patent number: 4734788
    Abstract: A color printer/plotter includes a frame having a paper inlet, a number of print stations, and a paper outlet. The paper is pulled past the print stations by a single driver at the paper outlet. Each print station includes a electrostatic charging head having a flat charging surface against which a first roller, typically having a foam outer surface, presses with the paper therebetween. Immediately downstream of the charging head a toner roller supplies toner to the paper, the toner adhering to the charged areas on the paper. A second pressure roller presses the paper against the toner roller. The second pressure roller is offset slightly upstream of the center of the toner roller to aid toner roller-paper contact. The sizing and positioning of the toner and second pressure rollers is such so as not to significantly deflect the paper from the substantially straight paper path between the paper inlet and paper outlet.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: March 29, 1988
    Assignee: Benson, Inc.
    Inventors: David M. Emmett, Robert L. Nieto, Joseph Camacho
  • Patent number: 4733254
    Abstract: A thermal head employed in a printer includes a plurality of heating elements which are mounted on a molybdenum rod arranged at the edge portion of an aluminum plate. A plurality of drive integrated circuits, mounted on the aluminum plate, control the heating elements in response to an image signal through lead electrodes formed on the circumferential surface of the molybdenum rod. Connecting portions of the lead electrodes and integrated circuits are electrically connected through a polyimide film where electric wiring patterns are formed. In order to use the laser bonding process, these connecting portions of the lead electrodes and integrated circuits are flush with one another.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: March 22, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hayamitu Yukihiro, Kunihiko Miura, Takefumi Nosaki
  • Patent number: 4731621
    Abstract: A recording apparatus having a printing head, comprises a support having heating elements, a film being contacted the support to face the elements and having nozzle holes on a region facing the elements, an ink holder, arranged near the holes and on one of opposing surfaces of the film and the support, for holding externally supplied ink, and a vibrator for vibrating the support to supply ink to the holes from the ink holder through a gap between the opposing surfaces of the film and the support.In another embodiment a drive unit may reciprocally move the nozzle member in the alignment direction. In a further embodiment the drive unit may reciprocally move the film and spacer relative to the support and the ink supplier.
    Type: Grant
    Filed: March 24, 1987
    Date of Patent: March 15, 1988
    Assignees: Kabushiki Kaisha Toshiba, Soartec Corporation
    Inventors: Mamoru Hayamizu, Ichiro Sano, Toshiaki Sakai
  • Patent number: 4731673
    Abstract: An image output device has a plurality of memories each capable of reading and writing parallel data transferred in, means for instructing reading of the image data parallelly written in parallel in the memories, and a plurality of dot forming means for forming dots in accordance with the image data read from the memories.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: March 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tadashi Yamakawa
  • Patent number: 4731619
    Abstract: In a thermal head according to the present invention, a rod-like member having a circular cross-section is mounted on a support member. An array of heating elements is provided on the rod-like member. Drive signal side electrodes and driving power source side electrodes are connected to each heating element. The drive signal side electrodes are connected to a driver integrated circuit (IC). The driving power source side electrodes are connected in common at ends thereof to provide a common electrode. The common electrode extends along the outer circumferential surface of the rod-like member, is exposed on the side of the driver IC along the surface of the rod-like member opposing the support member, and is connected to a driving power source pattern on the side of the driver IC. A thermistor for detecting a temperature is provided in the vicinity of the rod-like member.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: March 15, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kunihiko Miura, Takashi Shimazaki
  • Patent number: 4730221
    Abstract: Identification of constant grey components in electronic screening by first determining from the continuous-tone input, the maximum value of grey, the minimum value of grey and the average value. The average value is used to determine how many white bits are to be turned on in the halftone dot generated. Since "Moire" problems only occur only from the fluctuating part of the input, the three grey ranges corresponding to the minimum, the maximum and the fluctuating portions of the grey found in the area are then treated separately. The minimum and maximum grey levels identify constant levels within the grey area. That is, every point is at least as light as the minimum and every point is no lighter than the maximum. A template black dot corresponding to the amount of black in the maximum light grey area is generated and correspondingly a template white dot corresponding in size to that for the minimum grey level is generated, and compared to those actual dots created by ordinary halftoning.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: March 8, 1988
    Assignee: Xerox Corporation
    Inventor: Paul G. Roetling
  • Patent number: 4725861
    Abstract: In a printer in which a plurality of holes to be filled with ink are formed in an ink film, selectively heating ink generates bubbles from the holes and ejects ink due to the pressure of bubbles, thus printing an image on a sheet. A cartridge for integrally holding the ink film with holes, a pair of rollers for holding the ink film, ink soaking members for supplying ink to the ink film, and a seal member for sealing the ink soaking members from outer atmosphere is detachably mounted.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: February 16, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Goro Oda
  • Patent number: 4724447
    Abstract: In a printer in which a plurality of holes to be filled with ink are formed in an ink film, selectively heating ink generates bubbles from the holes and ejects ink due to the pressure of bubbles, thus printing an image on a sheet. The printer includes a conveying mechanism for conveying the ink film and shut conveying unit for conveying the sheet to a position facing the heating elements through the ink film. The conveying mechanism feeds the ink film at a speed lower than a sheet conveying speed.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: February 9, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Goro Oda
  • Patent number: 4717927
    Abstract: A liquid injection recording apparatus which discharges liquid droplets by the contraction or expansion of a piezo-electric element and effects recording by the use of the discharged liquid droplets is provided with a wave form shaping circuit for shaping the wave form of a signal applied to the piezo-electric element, and a converting circuit for impedance-converting the wave form shaped circuit. The converted signal is applied to the piezo-electric element.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: January 5, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventor: Eiichi Sato
  • Patent number: 4713699
    Abstract: The present invention provides a method for controlling the movement of a print medium to be printed, for example, in a facsimile device. The invention uses printing velocities for each line (or printing unit) to be printed, which are calculated based on the number of black picture elements in the image signal related to this line (or picture unit). These calculated printing velocities are stored each for succeeding line to be printed and are then used to determine the moving velocity of the print medium for the actual line being printed.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: December 15, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Kozoo Nakamura, Yasuyuki Kozima, Nagaharu Hamada, Kunihiro Sakata
  • Patent number: 4708486
    Abstract: Image-forming apparatus comprising an original document table on which an original document can be placed, an optical scanning mechanism for optically scanning an original document placed on the original document table, a moving mechanism which can cause reciprocal movement of this optical scanning mechanism parallel to the original document table, a specification switch for specifying the size of an original document placed on the original document table, detection switches which detect the position in which the optical scanning mechanism has been halted after being moved by the moving mechanism, a transferring mechanism that compares a first distance between the halt position of the optical scanning mechanism detected by the detection switches and one edge portion, going in the direction of scanning, of an original document of a size specified by the specification switch and a second distance between the optical scanning mechanism's halt position and the other edge portion of the original document and which
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: November 24, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Junji Watanabe
  • Patent number: 4707748
    Abstract: An image recording apparatus. A disposable part is detachably mounted therein. The apparatus includes a photosensitive member which is imagewisely exposed to a dots of beam in accordance with the signal of the image to be recorded. A counter counts clockpulses during the time when the signal of the image to be recorded being produced. Utilizing the output of the counter, the signal corresponding to the degree of consumption of the disposable or consumable part is generated.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: November 17, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasumasa Ohtsuka, Masaharu Ohkubo
  • Patent number: 4707715
    Abstract: A printing apparatus which prints the dot-matrix characters or dot-matrix graphic patterns on a paper sheet one page at a time by scanning a photosensitive drum with a modulated laser beam in accordance with the recording data externally supplied and by transferring an image on the drum onto the paper sheet. This printing apparatus comprises page memory for storing the dot-matrix image according to the recording data, margin table for storing the margin data of the respective sizes of the paper sheets and a controller for incorporating the margin data into the dot-matrix image read from the page memory and for supplying the incorporated image to the laser scanning unit for modulating the laser beam.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: November 17, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Kunihiko Miura
  • Patent number: 4707704
    Abstract: An ink jet printer with a roll of paper stored within an imaging drum. The paper through a longitudinal opening in the drum to the outside, passes around the drum, where it is held in place during the imaging process, and then ejected from the drum to the desired length and cut off by a cutter that extends the full width of the paper. While the imaged sheet is being ejected from the drum, the next length of paper is drawn from the interior of the drum and around the outside of the drum in position for the next imaging operation. The length of paper that remains projecting from the drum after the imaged paper has been cut off is then withdrawn into the interior of the drum through the longitudinal opening in the drum surface until only a short stub, which will not interfere with the subsequent imaging operation, remains protruding from the drum. Precise movement of the paper is under the control of a counter that is responsive to the paper movement.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: November 17, 1987
    Assignee: Advanced Color Technology, Inc.
    Inventors: David Allen, Arthur Cleary
  • Patent number: 4707712
    Abstract: An ink jet printer in which a roll of paper is stored within an imaging drum and feeds through a longitudinal opening in the drum to the outside, passes around the drum, where it is held in place during the imaging process, and then ejected from the drum and cut off. While the imaged sheet is being ejected from the drum, the next length of paper is drawn from the interior of the drum and around the outside of the drum in position for the next imaging operation. The paper is withdrawn from the drum by a traction roller that engages only the center portion of the paper to prevent the paper from skewing because of unequal forces applied to the edge portions of the paper. The same traction roller is also used in a reverse mode to tension the paper around the drum.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: November 17, 1987
    Assignee: Advanced Color Technology, Inc.
    Inventors: Dennis J. Buckley, Arthur Cleary, Calvin Winey
  • Patent number: 4706131
    Abstract: A thermally developed photographic copier is provided having two controls, one for adjusting the contrast, or blackness, of an image, and another for adjusting background contrast. A microprocessor samples and processes the settings of these controls to produce a video pedestal determined bythe background contrast control, and a gain control signal adjusted for effects of the background contrast setting to keep amplified video singals within the dynamic range necessary for the image contrast setting. Video signals used to expose light-sensitive paper or film are amplified in accordance with the gain control signal and combined with the video pedestal for desired background contrast.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: November 10, 1987
    Assignee: Johnson & Johnson Ultrasound, Inc.
    Inventors: Herbert Perten, William Ambrose
  • Patent number: 4704638
    Abstract: An image information reading device for optically scanning an original document placed on a document base with use of an optical system including a light source and a beam condensing fiber lens and a reading device including a photoelectric converter to thereby read out the image information of the document; comprising an adjusting member for adjusting the vertical positions of guide members reciprocatably supporting and guiding the reading device to achieve a parallel relation between parts in the reading device, the fiber lens whose optical axis is disposed parallel to the document, and a printed circuit substrate mounted with circuits for processing of an output signal of the photoelectric converter and disposed parallel to the document surface and under the fiber lens, whereby the apparatus can be made thin and small in weight. Further, the respective parts of the reading device are fixed to a single block, thus improving the assembling accuracy of the respective parts.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: November 3, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yosuke Igarashi