Error Checking Patents (Class 235/437)
  • Patent number: 4646353
    Abstract: A method and apparatus for checking deviations in dimensions and contrast of patterns 1 which are presented for checking purposes at a practically constant speed v of a continuously variably adjustable magnitude, in particular of identical patterns 1 printed on a repetitive fixed area 3 on a strip 2 of flat carrier material 30, each pattern 1 consisting of parallel lines of bar codes printed at predetermined mutual distances, by optically forming an image of each pattern to be checked upon a fixed format and by taking several traverse images therefrom at an angle .beta. with respect to the direction 6 of the bars by means of the row(s) of closely arranged electrical sensing elements, said traverse images being read out serially and subsequently entered into an electronic arithmetic apparatus for comparison with a reference pattern.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: February 24, 1987
    Assignee: Stork Screens B.V.
    Inventors: Johannes Tenge, Paul A. Tenge
  • Patent number: 4587411
    Abstract: A method of printing and checking a printing image, e.g., bar codes, of a thermoprinter. The just-printed printing image is scanned after printout of a portion of the printing image on the paper web by means of an opto-electronic sensor which can move relative to the paper web, reading the just-printed printing image in the process. The read result is compared and checked with the originally entered data and, if an error is detected, the remainder of the printing image still to be printed or the just-printed printing image is marked by the printer as unusable, e.g., blackened.
    Type: Grant
    Filed: January 4, 1984
    Date of Patent: May 6, 1986
    Assignee: F & O Electronic Systems GmbH & Co.
    Inventors: Gunther Obstfelder, Gerhard Kreutze, Winfried Luttig
  • Patent number: 4564752
    Abstract: A method and system for processing documents such as checks for achieving concurrent, reject, re-entry of sorter rejects of the documents in association with a sorting machine. A document reader such as a MICR reader for example, and an imaging apparatus are included along the document track to generate MICR data and digitized image data for each document passing thereby. A document whose MICR data is read correctly is routinely sorted while a document whose MICR data is not read correctly or completely is sorted in a reject pocket. The data needed to complete or correct the MICR data is obtained by an operator viewing an image of the document on a data entry terminal while the associated document is still physically located in the reject pocket. After a first pass or run of the documents through the sorter, the now-complete data obtained by the operator is used to sort the rejected documents on a second pass through the sorter to provide the re-entry of the sorter rejects.
    Type: Grant
    Filed: December 23, 1982
    Date of Patent: January 14, 1986
    Assignee: NCR Canada Ltd
    Inventors: Daniel A. Lepic, Robert B. Nally
  • Patent number: 4339820
    Abstract: A method of securing data on a data support and means for performing the method are provided. In the method, the data of successive data units forming a coded text are rearranged and recorded on the data support in coded form. Coding is performed in accordance with a variable code. The variable code is determined by a given number contained in the text and individually characterizing the data support. Decoding of data recorded in accordance with the method is governed by an instruction number controlling the coding and/or decoding device.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: July 13, 1982
    Inventor: Hermann Stockburger
  • Patent number: 4322613
    Abstract: A method for inhibiting tampering with data on a magnetic stripe card is disclosed. The data are erased if the card is prematurely withdrawn from the reader/writer. A write protect bit is set and recorded on the card if the power source is interrupted. Apparatus for activating the tamper-proofing techniques are disclosed.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: March 30, 1982
    Assignee: Vendacopy, Inc.
    Inventor: Ralph J. Oldenkamp
  • Patent number: 4291384
    Abstract: System for dynamically testing the dimensional accuracy of punched tape. A microprocessor controller and modified capstan drive tape reader are utilized to provide large volume checking of punched tape. Dimensional requirements of the tape are tested dynamically at tape reader speeds.
    Type: Grant
    Filed: May 16, 1980
    Date of Patent: September 22, 1981
    Assignee: The Boeing Company
    Inventors: James M. Burton, Robert L. Miller, Jansey D. Tieden
  • Patent number: 4273996
    Abstract: A card reader having a limited capacity for use with digitally encoded cards is used in conjunction with a system requiring a greater amount of information than is encoded on a single card. A multiple stage buffer storage memory is placed between the card reader and the utilization system. The memory has specific memory locations corresponding to locator data which is uniquely encoded on each of the different cards of a set of cards employed to supply the necessary information to the utilization system. A data locator is connected between the card reader and the buffer storage means and is responsive to locator data read from the cards by the reader to direct the information data on the cards to the proper location in the buffer storage memory. The cards may be inserted into the reader in any order; and when all of the areas of the buffer storage memory have the necessary data encoded in them, the information is transferred from the buffer storage memory to the utilization system.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: June 16, 1981
    Assignee: Engineered Systems, Inc.
    Inventor: Dan G. Weimer
  • Patent number: 4272675
    Abstract: A symbol processing system incorporated in an NMOS/LSI chip separates valid data from invalid data all generated by scanning a bar-coded symbol. The signals representing the bars and spaces of the symbol are decoded by a pattern recognition array, and the decoded data is clocked into a storage unit. When valid data is discovered, such data is captured within the storage unit. The valid data is then clocked out of the storage unit to a utilization device for further processing.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: June 9, 1981
    Assignee: NCR Corporation
    Inventors: Denis M. Blanford, Syed Naseem
  • Patent number: 4239151
    Abstract: This specification describes apparatus for reading and decoding data encoded in terms of the spacing between adjacent code bars on a document. The apparatus contains reading means for producing an electrical pulse for each bar recorded on the document as the bar passes the reading element. A counter is used to measure the time between each two pulses and the resultant counts are stored in a memory in the order in which the pulses were produced by the reading means. A microprocessor then compares this stored data with microcoded data representative of properly coded digits. If there is a compare the stored data is shifted out of the memory and into a computer for use. However if there is a no-compare the microprocessor alters the data on the assumption that a particular type of error has occurred and again compares the modified data with the microcoded data. If this results in a compare the modified data is again read out and into the using computer.
    Type: Grant
    Filed: April 19, 1979
    Date of Patent: December 16, 1980
    Assignee: International Business Machines Corporation
    Inventors: Mats A. Enser, Nils G. Stalberg
  • Patent number: 4237375
    Abstract: An opto-electronic apparatus for reading out preferably coded information contained on a data carrier with high reliability and free of disturbances even when the insertion speed of the information carrier into an associated opening of the reading apparatus depends only on the arbitrary actuation by the operating person, including retrograde motions or stoppage of the information carrier. The apparatus is especially adapted to the read-out of information coded in a card as a pattern of alternating transparent and opaque areas which are subjected to infrared radiation whose passage or non-passage is detected by suitable detectors. The process of reading out the information contained in the data carrier is timed or clocked by a clock cycle generated from a clock trackcontained in the data carrier itself.
    Type: Grant
    Filed: October 18, 1978
    Date of Patent: December 2, 1980
    Assignees: Firma Interlock Sicherheitssysteme GmbH, Firma Interflex Datensysteme GmbH & Co. K.G.
    Inventor: Carl Granholm
  • Patent number: 4224508
    Abstract: A low cost, high performance bar code reader is required for reading the CFC-6 character font. The character is printed in fluorescent bars which are coded by different spacing between each bar so that it can be machine readable. A special recognition logic is developed to read the font when it is data lifted by the analog front end. An error correction capability is built in to correct certain correctable errors such as a missing bar.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: September 23, 1980
    Assignee: Recognition Equipment Incorporated
    Inventor: Charles T. Kao
  • Patent number: 4207814
    Abstract: Method and apparatus for use in numbering a series of successively fed documents with consecutive serial numbers and corresponding check digits, including weighted, non-sequential check digits. The check digits are independently applied by a single, engraved wheel mounted on the periphery of a rotating sleeve and positioned by an eccentrically-mounted electronically-controlled stepping motor, with the consecutive serial numbers being applied by a conventional consecutive decimal numbering head mounted to a separate, rotating shaft. Multiple check digit wheels and/or multiple consecutive decimal numbering heads may be employed.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: June 17, 1980
    Inventor: William D. Schenk
  • Patent number: 4172553
    Abstract: An apparatus for verifying the tolerance of the positions of holes in in form of a continuous web is moved over an opaque plate on which there are a plurality of transparent areas in the form of slits. The slits in the plate are illuminated by light sources placed above the plate. Photocells are placed below the plate in position with the slits so as to be responsive to the light coming therethrough. The moving web of punched material is positioned with respect to the plate such that when the holes are in tolerance they pass between pairs of slits, thereby blocking the light from reaching the photocells. If a hole position is out of tolerance, it passes over one or more of the slits, thereby permitting the corresponding photocells to provide an output. This indicates the presence of an out-of-tolerance hole.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: October 30, 1979
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Larry M. Feather, Joseph Ferrero
  • Patent number: 4160901
    Abstract: A coincidence testing method for enhancing the reliability of output data from a label reader adapted to read a bar code consisting of a plurality of bars. Each bar in the bar code is scanned at a plurality of points and sets of binary symbols representative of the scanned points along each bar are obtained. Then the binary symbols in each set are ordered to correspond to the order of the scanned points or segments along each bar. Then coincidence tests are performed on successive pairs of binary symbols in each set to determine whether a reliable decision can be made for each bar.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: July 10, 1979
    Assignee: Shinko Electric Co., Ltd.
    Inventors: Sadao Nakanishi, Kazuhiro Suzuki, Nobufumi Tokura, Shinichiro Endo
  • Patent number: 4141492
    Abstract: Signatures of a book are identified with a binary coded indicia on the backbone. A signature verifier having a row of indicia sensors associated with the stack of signatures in the stream feeder of a gathering machine senses the coded indicia. In the event of an error, the verifier gives an alarm or stops the stream feeder. A book of plural signatures has a plurality of indicia on the backbone. A verifier has corresponding plural rows of sensors which detect the indicia and are sampled sequentially.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: February 27, 1979
    Assignee: R. R. Donnelley & Sons, Inc.
    Inventors: Walter A. Michel, Donald E. Hagenbart
  • Patent number: 4136821
    Abstract: A light source, a converging lens and a light responsive image sensor are optically coupled to recognize the code information such as bar codes recorded on an object. The light source supplies the code information with illumination light and the image sensor receives the reflected light through the converging lens to convert it into the image signal. The distance between the lens and the image sensor is adjusted automatically in response to the image signal such that clear reflected light is received by the image sensor, whereby correct information recognizing operation is attained.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: January 30, 1979
    Assignee: Nippondenso Co., Ltd.
    Inventors: Akio Sugiura, Atutoshi Okamoto, Tadao Nojiri
  • Patent number: 4118687
    Abstract: Disclosed is a portable optical character recognition system which may be used as a point-of-sale or inventory taking system which operates from battery power and may be moved from place to place without difficulty. The system includes an edit and sequencing system which guides the operator in its use, alerting the operator when the proper sequence of input is not used and when an incorrect reading has been made. The system includes visual read out and tape cassette recording of the input to the system to keep a permanent record thereof. A power conserve circuit is incorporated into system to turn the system off in between the reading of lines of data yet retain the proper sequencing when reading is continued.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: October 3, 1978
    Assignee: Recognition Equipment Incorporated
    Inventors: Lynn D. McWaters, Hersh B. Parekh
  • Patent number: 4061900
    Abstract: System and method for validating UPC (Universal Product Code) or TRI-BAR indicia on packaging or the like and which includes means for finding the start and end codes of the indicia, means for checking the tolerances of the black-white band pairs of the indicia, etc., in order to control the storage and use of information obtained from the indicia.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: December 6, 1977
    Assignee: Data General Corporation
    Inventor: Francis John Masciarelli
  • Patent number: 4059225
    Abstract: A label incorporating a plurality of concentric rings having two different light reflective characteristics provides a binary coded label on which any desired information can be displayed, and which may be secured to various objects. By passing the label in any orientation over a label scanning assembly which provides a scanning light beam, the label code signal is read and transmitted to a label information assembly which converts the label signal to digital signals, determines when the entire label signal has been read, and transmits the complete label information to data storage.
    Type: Grant
    Filed: August 27, 1971
    Date of Patent: November 22, 1977
    Inventor: James A. Maddox
  • Patent number: 4056710
    Abstract: A system for decoding encoded character information characterized by a plurality of bars of alternating light reflective characteristics of one or more widths in applications such as reader/scanner systems utilizing a decision tree technique that enables decoding to take place on line in real time.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: November 1, 1977
    Assignee: Coherent Radiation
    Inventors: Robert C. Shepardson, Michael E. Watts
  • Patent number: RE31692
    Abstract: A system and method for character recognition in which each of a plurality of characters is recognized both magnetically and optically. If the magnetic reader fails to recognize a character while the optical reader is successful in recognizing it, a character identification signal corresponding to the character recognized by the optical reader is generated while if the optical reader fails to recognize a character and the magnetic reader is successful in recognizing it, an identification signal corresponding to the character recognized by the magnetic reader is generated. Where the magnetic and topical readers provide signals indicative of different characters while attempting to read the same character, depending on the parameters of the system an identification signal corresponding to one or the other recognition signals, or a reject signal is generated.
    Type: Grant
    Filed: June 5, 1978
    Date of Patent: October 2, 1984
    Assignee: Optical Recognition Systems, Inc.
    Inventors: Robert M. Tyburski, Donald W. Russell, Brian D. Mayberry, Joseph R. Kenney