Machine readable merchandise marking tag
US3985293A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1974 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Nov 4, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2019/06243
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The code and record medium of the present invention is comprised of a plurality of code marks which are positioned around the periphery of one or more circles in a predetermined sequence, on a record member, for merchandise marking or other appropriate use. One or more of the code marks can be designated to be a marker for an orientation of the code sequence. A machine can read the code marks by scanning the code marks with a light beam, or other suitable scanner, as an associated article of merchandise, for example, is moved transversely across the scan path of the beam. Light reflections from the code marks are detected and converted into corresponding electrical signals. The electrical signals are then compared against known valid signals to eliminate false signals not corresponding to known code marks. Valid signals may be serially fed to a shift register which shift register, upon receipt of all valid signals corresponding to the reading of one plurality of code marks, end-around shifts the received signals to align the marker signal in a predetermined location in the shift register thereby placing all of the received signals in sequence regardless of the angular orientation o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.