Patents Examined by James R. McDaniel
  • Patent number: 4913569
    Abstract: A wire-type print head comprises an armature to which a rear end of a printing wire is fixed, a core having its forward end adjacent to a rear surface of the armature, a leaf spring having a first end fixed near a permanent magnet and a second end fixed to the armature, and an auxiliary core positioned between the permanent magnet and the core, and having a forward end adjacent to the rear surface of the armature. An electric current is made to flow through a coil wound on the core for generating a magnetic flux through the core in a direction to cancel the magnetic flux due to the permanent magnet. When the coil is not energized the armature is attracted toward the core to resiliently deform the leaf spring. When the coil is energized the armature is released and moved forward by the action of the leaf spring. The rear surface of the armature is kept in contact with the front end of the auxiliary core so that the front end of the auxiliary core forms a fulcrum point for swinging of the armature.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: April 3, 1990
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Tatsuya Koyama, Tetsuhiro Yamada, Hirokazu Ando, Katsuya Kamimura
  • Patent number: 4913568
    Abstract: A dot printer wherein a film of magnetic ink is formed in a slit shaped between a pair of magnetic poles, and needles piercing through the ink film thus formed are driven to deposit the magnetic ink on a recording paper so as to print dots thereon. The tips of the needles in an undriven state are positioned in the ink film proximately to one surface thereof adjacent to the recording paper, so that an adequate amount of the magnetic ink is deposited on the paper to eventually attain clear printing.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: April 3, 1990
    Assignee: Tokyo Electric Co., Ltd.
    Inventor: Yoshihiro Torisawa
  • Patent number: 4898489
    Abstract: A printer system containing an elastic endless sheet member which extends between roller members in front of a print head. The roller members are disposed so as to form a flat surface of the elastic endless sheet member in front of the print head in order to ensure clean printing. One of the roller members is connected to a paper feed motor so that a paper sheet is fed in front of the print head in the vertical direction in unison with the rotation of the elastic endless sheet member around the roller members.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: February 6, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Junichiro Matsumoto, Mitsuhiro Shimada, Yoichi Yamamoto
  • Patent number: 4898486
    Abstract: A thermocarbon ribbon is formed by emulsifying two mutually incompatible thermoplastic polymers melting at heat-transfer temperatures of a wax. The emulsion containing a pigment is applied to a ribbon support and the solvent is evaporated. The ribbon has multi-strike capabilities and improved sharpness of transfer to rough paper resulting from the presence in the solid continuous phase of beads or microspheres of a dispersed phase, both phases being formed by the polymers.
    Type: Grant
    Filed: February 10, 1988
    Date of Patent: February 6, 1990
    Assignee: Pelikan Aktiengesellschaft
    Inventors: Norbert Mecke, Heinrich Krauter
  • Patent number: 4896980
    Abstract: A method and associated apparatus for quickly and accurately advancing paper between the platen and printing mechanism on a line-by-line basis in a high speed printer for printing lines of text including a platen and a printing mechanism disposed adjacent the platen.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: January 30, 1990
    Assignee: Royden C. Sanders, Jr.
    Inventors: Royden C. Sanders, Jr., John L. Forsyth
  • Patent number: 4896979
    Abstract: A device for a paper transport in an office machine, in particular in a matrix printer, presupposes the presence of side plates (1, 2), wherein a print-support surface (7) is supported and, in addition, a friction drive including a roller pair for individual sheets (9) to be transported or, respectively, endless webs (10) without edge perforation, and tractors (13) provided in pairs, which operate in push and pull operation.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: January 30, 1990
    Assignee: Mannesmann AG
    Inventors: Gerd Nolte, Erich Steppe
  • Patent number: 4895465
    Abstract: A thermocarbon ribbon is formed by emulsifying two mutually incompatible thermoplastic polymers melting at heat-transfer temperatures of a wax. The emulsion containing a pigment is applied to a ribbon support and the solvent is evaporated. The ribbon has multi-strike capabilities and improved sharpness of transfer to rough paper resulting from the presence in the solid continuous phase of beads or microspheres of a dispersed phase, both phases being formed by the polymers.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: January 23, 1990
    Assignee: Pelikan Aktiengesellschaft
    Inventors: Norbert Mecke, Heinrich Krauter
  • Patent number: 4893561
    Abstract: A printing plate fastening and tensioning assembly for use with a plate cylinder of a rotary printing machine uses springs and magnets to provide holding forces. The springs bias fastening or tensioning bars away from walls of a groove formed in the peripheral surface of the plate cylinder. Magnetic forces provided by magnetic carried either by the plate cylinder or by these movable bars attract a portion of the bar to the groove wall. This alternative use of spring or magnetic forces effects either a fastening or tensioning of a selected end portion of a printing plate carried by the plate cylinder.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: January 16, 1990
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventors: Heinrich K. Grosshauser, Georg Schneider
  • Patent number: 4893953
    Abstract: Disclosed is a printer having memory means for storing the vertical print position movement data so as to print a super-script or sub-script character. When the carriage is returned after printing in a nonstandard row position, the print position is moved down by an adjusted line feed amount based on the vertical movement data stored in the memory means.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: January 16, 1990
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yuji Kawakami, Sae Kawakami
  • Patent number: 4889439
    Abstract: The invention automatically divides the text at the end of the page in such a way that widow lines and orphan lines of text do not exist. The typewriter shifts the effective page end point to shift the orphan line of text to the next page of text or delays the page ending to accommodate the widow line on the present page rather than forcing the line to the top of the next page. The text is not altered in the memory of the typewriter and no stop codes or page end codes are inserted in the text memory, thereby eliminating revision problems with the paginated text.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: December 26, 1989
    Assignee: International Business Machines Corporation
    Inventors: Sherry A. Cook, Patrick J. Gerstle, David R. Smith, Kathryn R. Stilz
  • Patent number: 4889437
    Abstract: This invention is concerned with a ticket issuing machine system including a keyboard 6 to enter into the machine details of a ticket to be issued a printer 1 to print out ticket information on the ticket depending upon the data entered into the keyboard and means 8 for storing information about the tickets issued by the machine and which includes a store circuit board module 12 capable of storing data about the tickets issued and which is readily capable of being inserted into and removed from the ticket issuing machine to have the details of the tickets issued transferred to an exterior store. The machine includes optical emitting means 17, 20 and optical responsive means 8, 19 to enable signals to be passed.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: December 26, 1989
    Assignee: Almex Control Systems Limited
    Inventors: Paul Schofield, Graham P. Sewell
  • Patent number: 4884908
    Abstract: An overlappingly overstrikeable ribbon is described having a carrier film (2) and an ink-releasing coating (3) in the form of a plastic matrix applied thereto, which contains at least one fatty dye and/or oil-soluble dye and optional carbon black and/or other ink pigments, as well as further conventional additives. According to FIG. 1 the ink-releasing coating (3) can be subdivided into differently colored coatings (4a, 4b and 4c) representing the three primary colors and a black coating (4d) for producing color prints. The ink-releasing coating contains no fillers and contains a polyethoxylated fatty acid ester of a polyhydric alcohol as a solvent for the dye(s). This ribbon has advantages when used in continuously full cassettes which are more particularly used in matrix printing systems.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: December 5, 1989
    Assignee: Caribonum Ltd.
    Inventors: Hans Paffhausen, Ian Hogarth, Andrew Scott, Christine Mackintosh
  • Patent number: 4884904
    Abstract: A thermal printhead fixed to a pivotal supporting frame is held in operative printing contact with a web of printing medium backed by a platen roller under the bias of a spring device engageable with the pivotal supporting frame for the printhead. The spring device is operatively located relative to the platen roller so that the spring bias exerted establishes proper frictional feeding engagement between the web and the roller which is power driven. The spring device, the pivotal supporting frame for the printhead and the platen roller are mounted by a common housing section.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: December 5, 1989
    Assignee: Cognitive Solutions, Inc.
    Inventor: John F. Berquist
  • Patent number: 4883375
    Abstract: A guide shaft guides a print head, which moves along a print line of a platen to perform a printing operation. A rotating member and an eccentric cam member, having a toothed sector portion on its periphery, are mounted on the guide shaft. The guide shaft is guided on a frame by a bearing slot, so as to be movable toward and away from the platen. The eccentric cam member rotates as it is always spring-urged to engage a fixed engaging pin. As a result, the guide shaft moves in a direction transverse to its axis, thus changing a gap between the print head and the platen. As the eccentric cam member rotates in one direction, the print head moves away from the platen, in a retreat stroke. In a rear half of the retreat stroke, the toothed sector portion of the rotating member engages a toothed arm, which is connected to a paper bail member for holding a printing medium down on the platen.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: November 28, 1989
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yoshiyuki Karube, Yuji Kawahara
  • Patent number: 4883378
    Abstract: A sheet-feeding device for feeding individual sheets to the platen of a printing apparatus from a single storage unit or a plurality of storage units is provided. The sheet-feeding device incorporates selecting discs incorporating a switching arrangement for the purpose of establishing a driving connection with the associated printing apparatus to a separating roller for withdrawing a sheet from the selected storage unit. In the storage units which have not been selected, the switching disc prevents inadvertent activation of the non-selected storage units by a blocking device controlled by a counter which permits the switching arrangement to be blocked during the printing process in order to prevent undesired sheet feeding.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: November 28, 1989
    Inventor: Helmut Steinhilber
  • Patent number: 4881835
    Abstract: A printer including a gap changeover device for moving a print head and a platen relative to each other and thereby adjusting a head gap between the print head and a recording medium on the platen. A switch is provided to produce a signal where the recording medium includes a local portion whose thickness is greater than that of the remaining portion. A gap control device is responsive to the signal from the switch, to change a normally established head gap to a larger value. At the same time, a speed control device is operated to lower the printing speed, according to the larger head gap.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: November 21, 1989
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takeshi Niikawa
  • Patent number: 4881839
    Abstract: An electronic terminal is mechanically and electrically connected to an electronic printer module to form a portable electronic terminal/printer. The bottom housing of the terminal and an extended portion of the bottom housing of the printer module together form a dovetail type connection. The bottom housing of the terminal has a plurality of rails formed thereon and the extended portion of the bottom housing of the printer module has a plurality of channels formed therein for slidably receiving the rails, forming a dovetail type connection. One half of an electrical connector is mounted on the terminal and the other half of the electrical connector is mounted on the printer module in a position to couple when the mechanical dovetail connection is made. A latch mechanism, attached to the extended portion of the bottom housing of the printer secures the bottom housing of the printer and also the two halves of the electrical connector.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: November 21, 1989
    Assignee: Texas Instruments Incorporated
    Inventor: Thomas R. Grimm
  • Patent number: 4876957
    Abstract: An apparatus for applying an emulsion screen film of screen-printing is disclosed, which includes a support frame for vertically supporting a screen-printing plate and for holding a rolled emulsion screen film above the screen-printing plate, a film guiding- and cutting-mechanism for guiding and positioning the unrolled emulsion screen film in contact with a screen surface of the screen-printing plate from its upper portion and for cutting the film at a predetermined length, and a pressing- and applying-mechanism for pressing the emulsion screen film against the screen surface at its lower portion and for supplying an emulsion onto an opposite side of the screen surface relative to the contacted screen side while sliding upwardly in contact with the screen surface.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: October 31, 1989
    Assignees: Tokai Shoji Co., Ltd., Tokai Seiki Co., Ltd.
    Inventor: Shigekazu Sakai
  • Patent number: 4875412
    Abstract: A blanket cleaner for removing dust, lint or ink from a blanket cylinder in an offset printing press during the uninterrupted course of a press run. A first fluid cylinder periodically urges a brush against the blanket cylinder and retracts the brush from the blanket cylinder. Retraction of the brush permits the dust and lint swept before the brush to fall onto a door of a lint catcher. The door is raised and lowered by action of a second fluid cylinder. Operation of the second fluid cylinder lags the operation of the first fluid cylinder by an interval of time sufficient to permit the dust, lint or ink to fall onto the door. In the preferred embodiment, the structure includes a device for removal of debris from the lint catcher.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: October 24, 1989
    Inventors: Norman D. Wright, Gary C. Glanzner, John A. Signorelli
  • Patent number: RE33134
    Abstract: A mechanism for encoding continuously moving documents. Documents are transported between a plurality of fixed dies and a plurality of electronically controlled hammers. An ink bearing ribbon is interposed between the documents and the fixed dies and is momentarily transported at the same velocity as the documents. As the documents traverse the plurality of fixed dies, the electronically controlled hammers are cycled, in a selected sequence and at selected positions, to provide the desired encoding. In those applications wherein the cycle time of the electronically controlled hammers is too slow to allow identical encoding in adjacent position, a second plurality of fixed dies and electronically controlled hammers may be located adjacent to the first plurality or interspersed among the first plurality of fixed dies.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: December 26, 1989
    Assignee: BancTec, Inc.
    Inventors: Gerald L. Johnson, Eugene C. Nolting, John H. Allen