GB1391389A - Bar code scanner - Google Patents

Bar code scanner

Info

Publication number
GB1391389A
GB1391389A GB2349173A GB2349173A GB1391389A GB 1391389 A GB1391389 A GB 1391389A GB 2349173 A GB2349173 A GB 2349173A GB 2349173 A GB2349173 A GB 2349173A GB 1391389 A GB1391389 A GB 1391389A
Authority
GB
United Kingdom
Prior art keywords
aperture
white
black
amplifier
photo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2349173A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1391389A publication Critical patent/GB1391389A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/016—Synchronisation of sensing process
    • G06K7/0166—Synchronisation of sensing process by means of clock-signals derived from the code marks, e.g. self-clocking code

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Character Input (AREA)
GB2349173A 1972-07-14 1973-05-17 Bar code scanner Expired GB1391389A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27196172A 1972-07-14 1972-07-14

Publications (1)

Publication Number Publication Date
GB1391389A true GB1391389A (en) 1975-04-23

Family

ID=23037830

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2349173A Expired GB1391389A (en) 1972-07-14 1973-05-17 Bar code scanner

Country Status (7)

Country Link
US (1) US3763351A (enExample)
JP (1) JPS5321818B2 (enExample)
CA (1) CA1000407A (enExample)
DE (1) DE2335711C2 (enExample)
FR (1) FR2193511A5 (enExample)
GB (1) GB1391389A (enExample)
IT (1) IT988999B (enExample)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784792A (en) * 1972-03-29 1974-01-08 Monarch Marking Systems Inc Coded record and methods of and apparatus for encoding and decoding records
US3906202A (en) * 1974-03-01 1975-09-16 Monarch Marking Systems Inc Data retrieval and error detection method and apparatus designed for use in a width-modulated bar-code scanning apparatus
US3887792A (en) * 1973-12-04 1975-06-03 Scope Inc Method and device for reading and decoding a delta-distance code
US3979577A (en) * 1973-12-05 1976-09-07 Data General Corporation Code recognition record medium and technique
JPS5615541B2 (enExample) * 1974-08-01 1981-04-10
US3898689A (en) * 1974-08-02 1975-08-05 Bell Telephone Labor Inc Code converter
US3932731A (en) * 1974-08-02 1976-01-13 Bell Telephone Laboratories, Incorporated Code converter
CA1054717A (en) * 1974-11-20 1979-05-15 E-Systems Optical reader correlation circuit
JPS547661B2 (enExample) * 1975-02-06 1979-04-09
US4044227A (en) * 1975-08-07 1977-08-23 The Upjohn Company Bar code reader
DE2843462C2 (de) * 1978-10-05 1986-02-06 Interflex Datensysteme Gmbh & Co Kg, 7730 Villingen-Schwenningen Optoelektrischer Code-Kartenleser
US4245152A (en) * 1979-10-23 1981-01-13 International Business Machines Corporation Decoding method and system for ETAB bar code
US4553027A (en) * 1984-10-03 1985-11-12 Eastman Kodak Company Apparatus for reading encoded information on a carrier subject to non-uniform motion
US4801789A (en) * 1986-07-07 1989-01-31 Videx, Inc. Replaceable reader head for optical code reader
CA2022269A1 (en) * 1990-01-05 1991-07-06 Theodosios Pavlidis Method of decoding bar code symbols from partial scans
EP1791075B8 (en) * 2005-11-29 2010-11-24 Datalogic Scanning Group S.r.l. Method, diaphragms and optical receiving devices for improving the depth of field in a linear optical code reader

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238501A (en) * 1962-08-29 1966-03-01 Ncr Co Optical scanning pen and codedcharacter reading system
US3243776A (en) * 1963-02-08 1966-03-29 Ncr Co Scanning system for registering and reading characters
US3502850A (en) * 1967-05-25 1970-03-24 Everet F Lindquist Data sensing system for a document scanner
US3708748A (en) * 1970-04-27 1973-01-02 Ibm Retrospective pulse modulation and apparatus therefor

Also Published As

Publication number Publication date
CA1000407A (en) 1976-11-23
JPS4953331A (enExample) 1974-05-23
IT988999B (it) 1975-04-30
FR2193511A5 (enExample) 1974-02-15
DE2335711C2 (de) 1981-10-15
JPS5321818B2 (enExample) 1978-07-05
DE2335711A1 (de) 1974-01-24
US3763351A (en) 1973-10-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee