Method and apparatus for U.P.C./EAN symbology ambiguous character compensation by localized thermal energy dot adjustment
US5853252A · kind A · utility
11Cited by
5References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | May 20, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K1/121
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is disclosed that can be used to print the U.P.C./EAN symbology in a way that does not suffer poor print quality over a range of ink spread conditions by applying appropriately more or less thermal energy to at least one row of dots on the internal edges of the ambiguous characters. The resultant characters have identical edge-to-edge measurements to those without the compensation; but, the sum of the widths of the bars are beneficially adjusted. The resulting print quality grades and scanning performance are enhanced on thermal printer platforms of moderate to high resolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.